Motronic, On Board Diagnostic (OBD) Page 1 of 19 01-1 Motronic, On Board Diagnostic (OBD) On Board Diagnostic (OBD), technical data Equipment Data is transmitted between the control module and the VAS5051 tester or VAG1551 Scan Tool (ST) via operating mode "Rapid Data Transfer". DTC memory is designed for permanent memory and is therefore not dependent on voltage supply. Display of stored DTCs occurs after initiation of display mode Page 01-15 .
Motronic, On Board Diagnostic (OBD) Page 2 of 19 01-2 If the ECM recognizes malfunctions that lead to a degradation of emissions values, it indicates them by lighting the Malfunction Indicator Lamp (exhaust warning lamp -K83-). Clarification of this lamp Page 01-3 . "E-Gas"-relevant malfunctions are also indicated in the instrument cluster by the warning lamp for Electronic Power Control ("EPC warning lamp"). http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Motronic, On Board Diagnostic (OBD) Page 3 of 19 01-3 Malfunction Indicator Lamp (MIL), significance If the ECM recognizes malfunctions that lead to a degradation of emissions values, it indicates them by lighting the Malfunction Indicator Lamp for exhaust. Installation position of exhaust MIL Note: The Malfunction Indicator Lamp (MIL) can blink or remain lit continuously. DTC memory should be checked in both cases Page 01-15 .
Motronic, On Board Diagnostic (OBD) Page 4 of 19 01-4 Malfunction Indicator Lamp (MIL), checking Special Tools and Equipment VAG1594A VAG1598/31 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Motronic, On Board Diagnostic (OBD) Page 5 of 19 01-5 Function test of warning lamp - Switch ignition on. Warning lamp for On Board Diagnostic (Malfunction Indicator Lamp -MIL-) must light up A - Warning lamp for On Board Diagnostic (Malfunction Indicator Lamp -MIL-) does not light up - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 . - Bridge sockets 1 and 47 of test box. - Switch ignition on. Warning lamp must light up.
Motronic, On Board Diagnostic (OBD) Page 6 of 19 Repair Manual, Electrical Equipment, Repair Group 90, Instrument cluster, removing and installing http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Motronic, On Board Diagnostic (OBD) Page 7 of 19 01-6 - Check the following wire connection for open circuit and short circuit to B+: Test box Instrument cluster VAG1598/31 Socket 47 Terminal Electrical Wiring Diagrams, Troubleshooting & Component Locations binder - Repair open circuit or short circuit if necessary. If wire connection is OK: - Replace Engine Control Module (ECM) 24-21 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Motronic, On Board Diagnostic (OBD) Page 8 of 19 01-7 B - Warning lamp for On Board Diagnostic (Malfunction Indicator Lamp -MIL-) remains lit constantly - Check DTC memory of Engine Control Module (ECM) Page 01-15 . If no DTCs are stored: - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Motronic, On Board Diagnostic (OBD) Page 9 of 19 Troubleshooting & Component Locations binder - Repair short circuit if necessary. If wire connection is OK: - Replace Engine Control Module (ECM) 24-21 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Motronic, On Board Diagnostic (OBD) Page 10 of 19 01-8 Safety precautions If special testing equipment is required during road test, note the following: WARNING! Scan tools and testing devices must always be secured on the rear seat and operated from there by a second person. If a scan tool or testing device were to be operated from the passenger seat and there were an accident involving activation of the passenger-side airbag, the person seated there could be seriously injured. http://127.0.0.
Motronic, On Board Diagnostic (OBD) Page 11 of 19 01-9 VAS 5051 vehicle diagnostic, testing and information system orVAG1551 Scan Tool (ST), connecting and selecting functions Test requirements: Fuses for engine electronics OK Electrical Wiring Diagrams, Troubleshooting & Component Locations binder Fuel Pump (FP) OK, checking 49 . Page 24- Battery voltage at least 12.7 V Ground (GND) connections at engine and transmission OK Procedure - Connect VAS5051 tester to vehicle with VAS5051/1 diagnostic wire.
Motronic, On Board Diagnostic (OBD) Page 12 of 19 Data Link Connector (DLC) is located in front left knee bolster. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Motronic, On Board Diagnostic (OBD) Page 13 of 19 01-10 WARNING! Observe safety precautions Page 01-8 . Note: The following description only explains implementation of On Board Diagnostic using VAG1551 Scan tool. When using the VAS5051 tester, observe the tester's instructions for use V.A.
Motronic, On Board Diagnostic (OBD) Page 14 of 19 - Start engine. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Motronic, On Board Diagnostic (OBD) Page 15 of 19 01-11 - Press -Print- button to turn on Scan Tool (ST) printer. Indicator lamp in button must light up. - Press button 1 to select "Rapid data transfer" operating mode 1. Rapid data transfer HELP When indicated on display: Insert address word XX Note: The address word 00 initiates the automatic test sequence, i.e. it results in a DTC check on all OBD capable systems in the vehicle via rapid data transfer.
Motronic, On Board Diagnostic (OBD) Page 16 of 19 01-12 Control module identification (example) 3B0907551 BA V6/5V Construction style of engine (V engine, 6 cylinder, 5 valves) "G" i.e. no indication Vehicle with or without cruise control system 0003 Data version (software version) of control module Coding 07251 WSC 12345 - Press HELP Parts Catalog Engine displacement 2.
Motronic, On Board Diagnostic (OBD) Page 17 of 19 01-13 Notes: It will be possible to display the control module identification again after pressing buttons -0and -1- to select "Check Control Module Versions" and confirming with the -Q- button.
Motronic, On Board Diagnostic (OBD) Page 18 of 19 01-14 Selectable functions VAS 5051 vehicle diagnostic, testing and information system or VAG1551 Scan Tool (ST) Ignition on, engine off Engine running Vehicle in drive at idle mode page Address words 01 Engine electronics Yes Yes Yes Page 01-9 00 Automatic test sequence Yes Yes Yes Page 01-11 Functions 01 Check Control Module Versions Yes Yes Yes Page 01-13 02 Check DTC Memory No Yes Yes Page 01-15 03 Output Diagnostic Test M
Motronic, On Board Diagnostic (OBD) 08 Read Measuring Value Block Page 19 of 19 Yes Yes http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 1 of 52 01-15 Check DTC Memory (function 02) and Erase DTC Memory (function 05) - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this. Note: If engine doesn't start, crank engine using starter for at least 5 seconds. Do not switch ignition off afterward under any circumstance.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 2 of 52 When printer is switched on, stored DTCs are shown in sequence and printed. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 3 of 52 01-16 - Find printed DTCs in DTC table and repair Page 01-18 . Important note: If there are no DTCs in DTC memory, DTC memory should not be unnecessarily erased or else readiness code will be lost. If DTC memory was erased, readiness code must be re-generated Page 01-82 . - Press Rapid data transfer HELP button.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 4 of 52 A static malfunction was not repaired. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 5 of 52 01-17 When indicated on display: Rapid data transfer DTC Memory is erased - Press button. - Check DTC memory again after repair work and erase it if necessary. Note: This causes DTCs to be erased that were stored during repair of malfunction, e.g. because harness connectors were disconnected. - If DTC memory was erased, readiness code must be re-generated Page 01-82 .
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 6 of 52 01-18 Diagnostic Trouble Code (DTC) table Notes: When malfunctions occur in monitored sensors or components, Diagnostic Trouble Codes (DTCs) are stored in DTC memory with a description of the malfunction type. "E-Gas"-relevant malfunctions are also indicated in the instrument cluster by the warning lamp for Electronic Power Control ("EPC warning lamp"); Notes for E-gas system Page 24-134 .
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 7 of 52 If the connector is disconnected from the ECM or the battery is disconnected, all adaptation values in the control module are erased. DTC memory content will remain intact however. If the engine is started after this, a rough, uneven idle can result. In this case, engine must be allowed to run at idle for a few minutes until adaptation procedure has been completed.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 8 of 52 01-19 DTC SAE DTC text Corrective action VAG P0101 16485 Mass Air Flow (MAF) sensor -G70Implausible signal1) - Check Mass Air Flow (MAF) sensor Page 24-56 P0102 16486 Mass Air Flow (MAF) sensor -G70Signal too small 1) P0103 16487 Mass Air Flow (MAF) sensor -G70Signal too large 1) P0112 16496 Intake Air Temperature (IAT) sensor -G42Signal too small 1) - Intake Air Temperature (IAT) sensor, checking 14 Page 28- P0113 1
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 9 of 52 01-20 DTC SAE DTC text Corrective action VAG P0130 16514 Bank 1, sensor 1 Electrical malfunction in circuit 1) - Testing Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC) Page 24-76 P0131 16515 Bank 1, sensor 1 Voltage too low 1) P0132 16516 Bank 1, sensor 1 Voltage too high 1) P0133 16517 Bank1, Sensor 1 Signal too slow 1) P0134 16518 Bank 1, sensor 1 No activity 1) 1) For these m
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 10 of 52 01-21 DTC SAE DTC text Corrective action VAG P0136 16520 Bank1, Sensor 2 Electrical malfunction in circuit 1) - Testing Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC) Page 24-97 P0137 16521 Bank1, Sensor 2 Voltage too low 1) P0138 16522 Bank1, Sensor 2 Voltage too high 1) P0139 16523 Bank1, Sensor 2 Signal too slow 1) P0140 16524 Bank1, Sensor 2 No activity 1) 1) For these malf
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 11 of 52 01-22 DTC SAE DTC text Corrective action VAG P0150 16534 Bank 2, sensor 1 Electrical malfunction in circuit 1) - Testing Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC) Page 24-76 P0151 16535 Bank 2, sensor 1 Voltage too low 1) P0152 16536 Bank 2, sensor 1 Voltage too high 1) P0153 16537 Bank 2, sensor 1 Signal too slow 1) P0154 16538 Bank 2, sensor 1 No activity 1) 1) For these
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 12 of 52 01-23 DTC SAE DTC text Corrective action VAG P0156 16540 Bank 2, sensor 2 Electrical malfunction in circuit 1) - Testing Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC) Page 24-97 P0157 16541 Bank 2, sensor 2 Voltage too low 1) P0158 16542 Bank 2, sensor 2 Voltage too high 1) P0159 16543 Bank 2, sensor 2 Signal too slow 1) P0160 16544 Bank 2, sensor 2 No activity 1) P0219 16603 M
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 13 of 52 01-24 DTC SAE DTC text Corrective action VAG P0300 16684 Combustion misfire detected 1) - Check fuel pressure - Test fuel injectors Page 24-30 Page 24-36 P0301 16685 Cyl. 1 combustion misfire detected 1) - Check spark plugs and ignition wires with connector P0302 16686 Cyl. 2 combustion misfire detected 1) - Check ignition coils Page 28-7 P0303 16687 Cyl.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 14 of 52 01-25 DTC SAE DTC text Corrective action VAG P0321 16705 Engine Speed (RPM) sensor -G28Implausible signal1) - Check sender for fuel gauge Page 28-19 P0322 16706 Engine Speed (RPM) sensor -G28No signal1) P0327 16711 Knock Sensor (KS) 1 -G61Signal too small - Check knock sensor Page 28-41 P0328 16712 Knock Sensor (KS) 1 -G61Signal too large P0332 16716 Knock Sensor (KS) 2 -G66Signal too small P0333 16717 Knock Sensor
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 15 of 52 01-26 DTC SAE DTC text Corrective action VAG P0420 16804 Catalytic converter system, bank 1, Not effective enough 1) P0421 16805 Primary catalytic converter, bank 1, Not effective enough 1) - Generate readiness code Page 01-82 . If the same malfunction is indicated again, replace primary catalytic converter, bank 1.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 16 of 52 01-27 DTC SAE DTC text Corrective action VAG P0430 16814 Catalytic converter system, bank 2, Not effective enough 1) - Generate readiness code Page 01-82 . If the same malfunction is indicated again, replace primary catalytic converter, bank 2.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 17 of 52 01-28 DTC SAE DTC text Corrective action VAG P0441 16825 Tank ventilation system - Check Evaporative Emission (EVAP) Canister Purge Regulator Valve, perform output Diagnostic Test Mode (DTM) Page 01-56 Throughput faulty 1) P0442 16826 Tank ventilation system - Checking fuel supply and ventilation systems for leaks Small leak detected 1) P0455 16839 Tank ventilation system Repair Manual, Engine Mechanical, Repair Gro
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 18 of 52 01-29 DTC SAE DTC text Corrective action VAG P0501 16885 Vehicle speed signal Implausible signal1) P0506 16890 Idle control Engine speed below specified value 1) - Check vehicle speed signal Page 24-168 - Checking throttle valve control module Page 24-141 P0507 16891 Idle control Engine speed above specified value 1) - Check hose setup (intake manifold change-over valve and Secondary Air Injection -AIR- solenoid val
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 19 of 52 01-30 DTC SAE DTC text Corrective action VAG P0571 16955 Brake light switch -F- - Check brake light switch and brake pedal switch Page 24-178 Implausible signal P0601 16985 Control module faulty1) - replacing Engine Control Module (ECM) Page 24-21 P0604 16988 Control module faulty1) P0605 16989 Control module faulty1) P1102 17510 Bank 1, sensor 1, heating circuit - Check oxygen sensor heating Page 24-116 Short ci
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 20 of 52 01-31 DTC SAE DTC text Corrective action VAG P1111 17519 Oxygen sensor control, bank 1 - Check oxygen sensor control before catalytic converter Page 24-76 - Next check signal wires for contact resistance => page are no contact resistances: Replace oxygen sensor Page 24-90 ; if there - Next check signal wires for contact resistance => page are no contact resistances: Replace oxygen sensor Page 24-112 ; if there Syst
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 21 of 52 01-32 DTC SAE DTC text Corrective action VAG P1115 17523 Bank 1, sensor 1, heating circuit - Check oxygen sensor heating Page 24-116 Short circuit to Ground (GND)1) P1116 17524 Bank 1, sensor 1, heating circuit Open circuit1) P1117 17525 Bank 2, sensor 1, heating circuit Short circuit to Ground (GND)1) P1118 17526 Bank 2, sensor 1, heating circuit Open circuit1) P1119 17527 Bank 2, sensor 1, heating circuit Short circu
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 22 of 52 Open circuit1) 1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01-3 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 23 of 52 01-33 DTC SAE DTC text Corrective action VAG P1127 17535 Bank 1, mixture adaptation (mult.) System too rich 1) - Road test vehicle (fuel in oil). P1128 17536 Bank 1, mixture adaptation (mult.) - Check Mass Air Flow (MAF) sensor Page 24-56 - Check intake system for proper seal Page 24-64 System too lean - Check fuel system pressure Page 24-30 1) P1129 17537 Bank 2, mixture adaptation (mult.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 24 of 52 mult. = multiplicative, means that malfunction is valid across entire range of engine speed and engine load. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 25 of 52 01-34 DTC SAE DTC text Corrective action VAG P1136 17544 Bank 1, mixture adaptation (add.) System too lean 1) - Road test vehicle (fuel in oil). P1137 17545 Bank 1, mixture adaptation (add.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 26 of 52 01-35 DTC SAE DTC text Corrective action VAG P1141 17549 Load detection Implausible value - Check to be sure the correct throttle valve control module is installed (part number) - Check Mass Air Flow (MAF) sensor Page 24-56 P1142 17550 Load detection Limit not reached P1143 17551 Load detection Limit exceeded P1147 17555 Oxygen sensor control, bank - Check oxygen sensor adaptation values and regulation 2 Page 24-83 S
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 27 of 52 01-36 DTC SAE DTC text Corrective action VAG P1149 17557 Oxygen sensor control, bank 1 Unplausible control value - Check oxygen sensor adaptation values and regulation Page 24-83 - Check fuel system pressure P1150 17558 Oxygen sensor control, bank 2 Unplausible control value Page 24-30 - Check intake system for proper seal 64 Page 24- P1171 17579 Angle sensor -2- for throttle drive (power accelerator - Check angle s
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 28 of 52 01-37 DTC SAE DTC text Corrective action VAG P1176 17584 Bank 1, oxygen sensor correction behind catalytic converter Control limit reached 1) P1177 17585 Bank 2, oxygen sensor correction behind catalytic converter Control limit reached 1) P1213 17621 Cylinder 1 fuel injector -N30Short circuit to B+1) - Check oxygen sensor aging of oxygen sensor before catalytic converter Page 24-93 - Check oxygen sensor and oxygen sensor
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 29 of 52 01-38 DTC SAE DTC text Corrective action VAG P1225 17633 Cylinder 1 fuel injector -N30Short circuit to Ground (GND)1) - Check fuel injectors Page 24-36 P1226 17634 Cylinder 2 fuel injector -N31Short circuit to Ground (GND)1) P1227 17635 Cylinder 3 fuel injector -N32Short circuit to Ground (GND)1) P1228 17636 Cylinder 4 fuel injector -N33Short circuit to Ground (GND)1) P1229 17637 Cylinder 5 fuel injector -N83Short circ
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 30 of 52 01-39 DTC SAE DTC text Corrective action VAG P1237 17645 Cylinder 1 fuel injector -N30- - Check fuel injectors Page 24-36 Open circuit1) P1238 17646 Cylinder 2 fuel injector -N31Open circuit1) P1239 17647 Cylinder 3 fuel injector -N32Open circuit1) P1240 17648 Cylinder 4 fuel injector -N33Open circuit1) P1241 17649 Cylinder 5 fuel injector -N83Open circuit1) P1242 17650 Cylinder 6 fuel injector -N84Open circuit1) 1) Fo
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 31 of 52 01-40 DTC SAE DTC text Corrective action VAG P1250 17658 Fuel level too low4) - Fill fuel tank with fuel - Check wire connection between Engine Control Module (ECM) and instrument cluster according to wiring diagram - Check signal from sender for fuel gauge and fuel gauge Repair Manual, Electrical Equipment, Repair Group 01, On Board Diagnostic (OBD) of instrument cluster; Read Measuring Value Block P1296 17704 Malfunct
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 32 of 52 01-41 DTC SAE DTC text Corrective action VAG P1325 17733 Knock control, cyl. 1 Control limit reached - Check knock control Page 28-33 P1326 17734 Knock control, cyl. 2 Control limit reached P1327 17735 Knock control, cyl. 3 Control limit reached P1328 17736 Knock control, cyl. 4 Control limit reached P1329 17737 Knock control, cyl. 5 Control limit reached P1330 17738 Knock control, cyl.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 33 of 52 01-42 DTC SAE DTC text Corrective action VAG P1335 17743 Engine torque monitoring 2 Control limit exceeded 2) 3) P1336 17744 Engine torque monitoring Control limit exceeded P1337 17745 Bank 1, Camshaft Position (CMP) sensor G163 Short circuit to Ground (GND)1) - Check hose setup - Check Intake Air Temperature (IAT) sensor 28-14 - Check Mass Air Flow (MAF) sensor - Check coolant temperature sensor Page Page 24-56 Page 2
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 34 of 52 2) For these malfunctions, ECM switches on the EPC warning lamp in instrument cluster. Significance of EPC warning lamp Page 24-136 . 3) For these malfunctions, the Engine Control Module (ECM) switches on the Malfunction Indicator Lamp (MIL) in the instrument cluster immediately after recognizing the malfunction. Meaning of Malfunction Indicator Lamp (MIL) Page 01-3 . http://127.0.0.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 35 of 52 01-43 DTC SAE DTC text Corrective action VAG P1386 17794 Control module faulty - replacing Engine Control Module (ECM) Page 24-21 P1391 17799 Bank 2, Camshaft Position (CMP) sensor -G40 - Check Camshaft Position (CMP) sensor Page 28-45 P1387 17795 Control module faulty1) P1388 17796 Control module faulty2) 3) Short circuit to Ground (GND)1) P1392 17800 Bank 2, Camshaft Position (CMP) sensor -G40 Open circuit / short
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 36 of 52 01-44 DTC SAE DTC text Corrective action VAG P1393 17801 Ignition output 1 Electrical malfunction in circuit - Check activation or wiring connection from Engine Control Module (ECM) to power output stage Page 28-12 P1394 17802 Ignition output 2 Electrical malfunction in circuit P1395 17803 Ignition output 3 Electrical malfunction in circuit P1410 17818 EVAP canister purge regulator valve -N80Short circuit to B+1) - Che
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 37 of 52 The terms "ignition output 1", "ignition output 2" and "ignition output 3" refer to the outputs on the Engine Control Module (ECM), via which the Engine Control Module (ECM) activates the power output stages at the ignition coil. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 38 of 52 01-45 DTC SAE DTC text Corrective action VAG P1414 17822 Bank 2, Secondary Air Injection (AIR) system Leak detected P1421 17829 Secondary Air Injection (AIR) solenoid valve -N112Short circuit to Ground (GND)1) - Check hose setup from pump to mechanical Secondary Air Injection (AIR) valve, cylinder bank 2 Repair Manual, Engine Mechanical, Repair Group 26; Secondary Air Injection (AIR) system - Check Secondary Air Injecti
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 39 of 52 01-46 DTC SAE DTC text Corrective action VAG P1424 17832 Bank 1, Secondary Air Injection (AIR) system Leak detected P1425 17833 EVAP canister purge regulator valve -N80Short circuit to Ground (GND)1) - Check hose setup from pump to mechanical Secondary Air Injection (AIR) valve, cylinder bank 1 Repair Manual, Engine Mechanical, Repair Group 26; Secondary Air Injection (AIR) system - Check Evaporative Emission (EVAP) Can
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 40 of 52 P1435 17843 Secondary Air Injection (AIR) pump relay -J299Short circuit to Ground (GND)1) 1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01-3 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 41 of 52 01-47 DTC SAE DTC text Corrective action VAG P1471 17879 Leak Detection Pump (LDP) tank ventilation system - Leak Detection Pump (LDP) Checking Short circuit to B+1) P1472 17880 Leak Detection Pump (LDP) tank ventilation system Repair Manual, Engine Mechanical, Repair Group 20; EVAP canister system components, servicing; Leak Detection Pump (LDP) -V144-, checking.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 42 of 52 01-48 DTC SAE DTC text Corrective action VAG P1501 17909 Fuel Pump (FP) relay -J17Short circuit to Ground (GND)1) - Check Fuel Pump (FP) relay Page 24-49 P1502 17910 Fuel Pump (FP) relay -J17Short circuit to B+1) P1512 17920 Intake manifold change-over valve -N156Short circuit to B+1) - Check intake manifold change-over Page 24-71 P1515 17923 Intake manifold change-over valve -N156Short circuit to Ground (GND)1) P151
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 43 of 52 Implausible signal4) 1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01-3 . 4) DTC is stored upon appropriate signal from airbag control module. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 44 of 52 01-49 DTC SAE DTC text Corrective action VAG P1529 17937 Camshaft adjustment Repair Manual, Engine Mechanical, Repair Group 15; Camshaft adjustment, checking; Solenoid valve for camshaft adjustment, checking Short circuit to B+1) P1530 17938 Camshaft adjustment Short circuit to Ground (GND)1) P1531 17939 Camshaft adjustment Open circuit1) P1539 17947 Clutch vacuum vent valve switch -F36- - Check clutch pedal switch Pa
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 45 of 52 P1544 17952 Throttle Actuation Potentiometer -G187Signal too large 2) 3) 1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01-3 . 2) For these malfunctions, ECM switches on the EPC warning lamp in instrument cluster. Significance of EPC warning lamp Page 24-136 .
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 46 of 52 01-50 DTC SAE DTC text Corrective action VAG P1545 17953 Throttle valve control Malfunction 2) 3) - Check throttle valve control module Page 24-141 P1558 17966 Throttle drive (power accelerator actuation) -G186Electrical malfunction in circuit 2) 3) P1559 17967 Throttle valve control module -J338Malfunction in basic setting 1) 2) - Perform adaptation P1564 17972 Throttle valve control module -J338Voltage too low duri
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 47 of 52 01-51 DTC SAE DTC text Corrective action VAG P1569 17977 Cruise control switch -E45- Repair Manual, Electrical Equipment, Repair Group 01; On Board Diagnostic (OBD) for cruise control system Implausible signal P1570 17978 Engine Control Module (ECM) locked P1579 17987 Throttle valve control module -J338Adaptation not started - Adapt electronic immobilizer to Engine Control Module (ECM) Repair Manual, Electrical Equipm
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 48 of 52 01-52 DTC SAE DTC text Corrective action VAG P1603 18011 Control module faulty1) - Replace Engine Control Module (ECM) Page 24-21 P1604 18012 Control module faulty2) 3) P1606 18014 Rough terrain info/engine torque from ABS control module Electrical malfunction in circuit P1609 18017 Crash shut-off was triggered - Check wire connection between Engine Control Module (ECM) and ABS control module (powertrain databus) Pag
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 49 of 52 01-53 DTC SAE DTC text Corrective action VAG P1386 17794 Control module faulty - Replace Engine Control Module (ECM) P1612 18020 Engine Control Module (ECM) incorrectly coded 1) - Code Engine Control Module (ECM) P1624 18032 Request for warning lamp on active - Exhaust related malfunction of Transmission Control Module (TCM) 7) Page 24-21 Page 01-71 - Check DTC memory of Transmission Control Module (TCM) Repair Ma
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 50 of 52 01-54 DTC SAE DTC text Corrective action VAG P1630 18038 Throttle Position (TP) sensor -G79Signal too small 2) 3) - Throttle Position (TP) sensor, checking Page 24-154 P1631 18039 Throttle Position (TP) sensor -G79Signal too large 2) 3) P1633 18041 Sender -2- for accelerator pedal position -G185Signal too small 2) 3) P1634 18042 Sender -2- for accelerator pedal position -G185Signal too large 2) 3) P1639 18047 Throttle P
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 51 of 52 3) For these malfunctions, the Engine Control Module (ECM) switches on the Malfunction Indicator Lamp (MIL) in the instrument cluster immediately after recognizing the malfunction. Meaning of Malfunction Indicator Lamp (MIL) Page 01-3 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Check DTC Memory (function 02) and Erase DTC Memory (function 05) Page 52 of 52 01-55 DTC SAE DTC text Corrective action VAG P1648 18056 Powertrain databus - Check Engine/ABS/Transmission control module Page 24-192 faulty P1649 18057 Powertrain databus Missing message from ABS control module P1682 18090 Powertrain databus Implausible message from ABS control module P1853 18261 Powertrain databus Implausible message from ABS control module P3262 16646 Exhaust bank 1/2 - Check data transfer of Engi
Output Diagnostic Test Mode (DTM) (function 03) Page 1 of 12 01-56 Output Diagnostic Test Mode (DTM) (function 03) Notes: Output Diagnostic Test Mode (DTM) is only possible with engine idle and ignition switched on. Output Diagnostic Test Mode (DTM) is aborted if engine is started or an RPM signal is recognized.
Output Diagnostic Test Mode (DTM) (function 03) Page 2 of 12 01-57 Output Diagnostic Test Mode (DTM) activates the following components in the specified sequence: Activation sequence 1 Evaporative Emission (EVAP) canister purge regulator valve -N80- 2 Secondary Air Injection (AIR) solenoid valve -N112- 3 Secondary Air Injection (AIR) pump relay J299- 4 Intake manifold change-over valve -N156- 5 Camshaft adjustment 1 (Valve 1 for camshaft adjustment -N205- and valve 2 for camshaft adjustment -N20
Output Diagnostic Test Mode (DTM) (function 03) Page 3 of 12 01-58 Test requirement: Fuses for engine electronics OK Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Ignition must remain switched on for this. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -3- to select "output Diagnostic Test Mode" and press -Q- button to confirm input.
Output Diagnostic Test Mode (DTM) (function 03) Page 4 of 12 01-59 Output Diagnostic Test Mode Indicated on display: EVAP canister purge regulator valve -N80 (Indicated on VAG1551: from EVAP canister purge regulator valve N80-) This valve is activated for approx. 1 minute (clicks), unless is pressed first to switch to the next actuator. - button If valve is not activated (does not click): - Check Evaporative Emission (EVAP) canister purge regulator valve N80- Page 24-128 .
Output Diagnostic Test Mode (DTM) (function 03) Page 5 of 12 - Press button. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Output Diagnostic Test Mode (DTM) (function 03) Page 6 of 12 01-60 Output Diagnostic Test Mode Indicated on display: Secondary air injection pump relay -J299 The Secondary Air Injection (AIR) pump relay -J299- (in 3-socket relay carrier in the E-box, at left in the plenum chamber , position 2) switches the Secondary Air Injection (AIR) pump motor -V101- on for approx. 1 minute in intervals unless the next actuator is selected first by pressing the button.
Output Diagnostic Test Mode (DTM) (function 03) Page 7 of 12 01-61 Activating camshaft adjustment valves - Press Output Diagnostic Test Mode button. Indicated on display: Camshaft adjustment 1 Valve -1- for camshaft adjustment -N205- and valve -2- for camshaft adjustment -N208- are activated for approximately 1 minute (they click) unless output Diagnostic Test Mode (DTM) is ended first by pressing the " button If valves are not activated (do not click).
Output Diagnostic Test Mode (DTM) (function 03) Page 8 of 12 01-62 Note: The click can be heard by listening near the rear left wheelhousing. If valve is not activated (does not click): Repair Manual, Fuel Supply System, Repair Group 20; components of the EVAP canister system, servicing; Leak Detection Pump (LDP) V144-, checking. Activating fuel injectors Note: Fuel injectors are activated according to ignition sequence: Cyl. 1, Cyl. 4, Cyl. 3, Cyl 6 Cyl. 2, Cyl 5.
Output Diagnostic Test Mode (DTM) (function 03) Page 9 of 12 If injector does not click: - Check fuel injectors Page 24-36 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Output Diagnostic Test Mode (DTM) (function 03) Page 10 of 12 01-63 - Press Output Diagnostic Test Mode button. Indicated on display: Cyl. 4 fuel injector -N33 - Press Output Diagnostic Test Mode button. Indicated on display: Cyl. 4 fuel injector -N33 Fuel injector must click 5 times after arrow button is pressed. If injector does not click: - Check fuel injectors - Press Output Diagnostic Test Mode Page 24-36 . button. Indicated on display: Cyl.
Output Diagnostic Test Mode (DTM) (function 03) Page 11 of 12 01-64 - Press Output Diagnostic Test Mode button. Indicated on display: Cyl. 6 fuel injector -N84 - Press Output Diagnostic Test Mode button. Indicated on display: Cyl. 6 fuel injector -N84 Fuel injector must click 5 times after arrow button is pressed. If injector does not click: - Check fuel injectors - Press Output Diagnostic Test Mode Page 24-36 . button. Indicated on display: Cyl.
Output Diagnostic Test Mode (DTM) (function 03) Page 12 of 12 01-65 - Press button. Indicated on display: Output Diagnostic Test Mode Cyl. 5 fuel injector -N83 - Press button. Indicated on display: Output Diagnostic Test Mode Cyl. 5 fuel injector -N83 Fuel injector must click 5 times after arrow button is pressed. If injector does not click: - Check fuel injectors Page 24-36 . Indicated on display: Output Diagnostic Test Mode END - Press Rapid data transfer HELP button.
Basic Setting (function 04) Page 1 of 5 01-66 Basic Setting (function 04) With ignition on and engine at standstill, the following operations can be performed using "function 04", basic setting: Adapt throttle valve control module to Engine Control Module (ECM) Display group 060 ( Page 24-142 ) Vehicles with automatic transmission: Adaptation of kick down function of accelerator pedal position sensor to ECM Display group 063 ( Page 24-161 ) With ignition on and engine running, the following operations ca
Basic Setting (function 04) Page 2 of 5 01-67 Test requirements for operations with engine running: No DTCs in DTC memory. Coolant Temperature at least 80 C. Electrical consumers switched off (radiator fan must NOT run during test). A/C switched off. Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this. - Check DTC Memory Page 01-15 .
Basic Setting (function 04) Page 3 of 5 01-68 Depending on desired operation: - Switch ignition on. or - Start engine. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -4- to select "Initiate basic setting" and press -Qbutton to confirm input. Initiate basic setting Q When indicated on display: Input display group number XXX - Input desired display group number.
Basic Setting (function 04) Page 4 of 5 01-69 Notes: For display group number 000, measured values are displayed as a decimal. Display can be printed out on the paper roll when printer is switched on. To switch to a different display group, proceed as follows: Display group VAG1551 Scan Tool (ST) VAS5051 tester higher Press button -3- Press s button. Lower Press button -1- Press t button. - Let engine run at idle for a few minutes, coolant temperature at least 80 C.
Basic Setting (function 04) Page 5 of 5 01-70 Display group 000 (indicated values decimal) Engine running at idle (Coolant Temperature not less than 80 C) 1 2 3 4 5 6 7 8 9 10 Display fields Specified represents value Adaptation value of mixture preparation, bank 2 77 to 179 -10 to 10 % 77 to 179 -10 to 10 % 115 to 141 -10 to 10 % 115 to 141 -10 to 10 % 102 to 169 -5 to 8 % 102 to 154 -5.0 to 5.0 % 0 to 8 0 to 3.
Code Control Module (function 07) Page 1 of 4 01-71 Code Control Module (function 07) If control module does not indicate coding corresponding to vehicle, or if control module has been replaced, code it as follows. - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Ignition must remain switched on for this.
Code Control Module (function 07) Page 2 of 4 X Vehicle model http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Code Control Module (function 07) Page 3 of 4 01-72 Coding example 07251 USA LEV 1) (emissions regulations), All Wheel Drive (AWD) without ESP 2) , 5 speed Automatic transmission, Audi A4 1) LEV: Abbreviation for Low Emission Vehicle 2) ESP: Abbreviation for Electronic Stability Program - Confirm input using the -Q- button. 3B0907551BA 2.8l V6/5V G 0003 Coding 07251 WSC 12345 VAG1551 Scan Tool (ST) display indicates control module identification, e.g.
Code Control Module (function 07) Page 4 of 4 01-73 Coding table Country/Exhaust Drive/Additional Functions Transmission Vehicle model 07 USA LEV (emissions regulation); Characteristic: Vehicles with Leak Detection Pump (LDP) 2 All Wheel Drive (AWD) without Electronic Stability Program (ESP) 5 Front Wheel Drive (FWD) with Anti-Slip Regulation (ASR) 7 All Wheel Drive (AWD) with Electronic Stability Program (ESP) 0 5 speed manual transmission 5 Automatic transmission 01V 1 Audi A4 Notes: Elec
Read Measuring Value Block (function 08) Page 1 of 3 01-74 Read Measuring Value Block (function 08) Test requirements: Coolant Temperature at least 80 C. Electrical consumers switched off (radiator fan must NOT run during test). A/C switched off. Steering in "straight-ahead" position Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this.
Read Measuring Value Block (function 08) Read Measuring Value Block Q Page 2 of 3 When indicated on display: Input display group number XXX - Enter desired three digit display group number and confirm by pressing the -Q- button. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Read Measuring Value Block (function 08) Page 3 of 3 01-75 Note: Which display group should be chosen depends on current function and component tests. Indicated on display for display group 000: Read Measuring Value Block 0 1 2 3 4 5 6 7 8 9 10 Indicated on display (example) for display group 001: Read Measuring Value Block 1 1 2 3 4 Notes: Display can be printed out on the paper roll when printer is switched on.
Readiness code Page 1 of 47 01-76 Readiness code The readiness code appears as an 8-digit display in measuring value block 086, display field 1. Each of the 8 digits is allocated to a specific exhaust related system. During a test sequence (which must be carried out in its entirity), On Board Diagnostic (OBD) checks the function of each of these systems and then changes the character assigned to it in the 8-digit display from a "1" to a "0".
Readiness code Page 2 of 47 01-77 Readiness code is returned to "0 1 1 0 1 1 0 1" if: DTC memory was erased, a new Engine Control Module (ECM) was installed In this case, readiness code must be regenerated Page 01-82 . Note: During driving operation in various load conditions, exhaust relevant tests are performed by the control module within a "short trip" and readiness code is generated on its own.
Readiness code Page 3 of 47 01-78 Readiness code, checking Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Ignition must remain switched on for this. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -8- to select "Read Measuring Value Block" and press -Q- button to confirm input.
Readiness code Page 4 of 47 01-79 Display fields 1 2 3 4 Display group 086: Readiness code Display 00000000 XXXXXXXX XXXXXXXX XXXXXXXX Indicated Status-digits individual tests carried out individual tests carried out individual tests carried out completed tests Functional range 1 = not completed 1 = not completed 1 = not completed 1 = not completed 0 = completed 0 = completed 0 = completed 0 = completed Specified value 00000000 Notes XXXXXXXX XXXXXXXX Meaning of readiness code
Readiness code Page 5 of 47 01-80 X X X X X X X X Notes for display group 086, display field 1 Diagnostic of catalytic converter Indication 0 = test was performed Indication 1 = test was not performed (generate readiness code Page 01-82 ) Indication always 0 EVAP system Indication 0 = test was performed Indication 1 = test was not performed (generate readiness code Page 01-82 ) Secondary Air Injection system Indication 0 = test was performed Indication 1 = test was not performed (generate readiness c
Readiness code Page 6 of 47 Indication 1 = test was not performed (generate readiness code Page 01-82 ) Indication always 0 Note: Readiness code is not generated until all indications in display field 1 show "0" http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Readiness code Page 7 of 47 01-81 Once the specified value "0 0 0 0 0 0 0 0" is reached in display field 1: - Press Rapid data transfer HELP button. Indicated on display (function selection): Select function XX - Check DTC memory as a control measure malfunctions may be stored). Page 01-15 (no If specified value is not obtained: - Generate readiness code Page 01-82 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Readiness code Page 8 of 47 01-82 Readiness code, generating Special Tools and Equipment VAG1788/10 RPM adjuster Requirements Electrical consumers switched off (radiator fan must NOT run during test). A/C system switched on. Vehicles with automatic transmission Selector lever in P or N. Coolant temperature at least 80 C Display group 4, display field 3. Important: Drive engine warm via road test if possible.
Readiness code Page 9 of 47 01-83 Work step 1: Check DTC Memory Test requirement Ignition switched on. - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -2- to select "Check DTC memory" and press -Qbutton to confirm input. X DTC recognized Number of stored DTCs or "No DTC recognized" will be indicated on display.
Readiness code Page 10 of 47 01-84 Work step 2: Erase DTC Memory Test requirement Engine not running, ignition switched on. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -5- to select "Erase DTC memory" and press -Qbutton to confirm input. Note: When DTC memory is erased, readiness code is reset and must therefore be re-generated. Rapid data transfer When indicated on display: DTC Memory is erased - Press button. http://127.0.0.
Readiness code Page 11 of 47 01-85 Work step 3: Adapt throttle valve control module to Engine Control Module (ECM) Test requirement Engine not running, ignition switched on. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -4- to select "Initiate basic setting" and press -Qbutton to confirm input.
Readiness code Page 12 of 47 01-86 Display fields 1 2 3 4 Display group 060: Adaptation of throttle valve control module Display Indicated Functional range xx % xx % Throttle Throttle valve angle valve angle (angle sensor 1) (angle sensor 2) 0 to 100 % 0 to 100 % x --- Adaptation step counter Adaptation condition 0 to 8 ADP in progress ADP OK ADP ERROR Specified value 3 to 93 % Notes 97 to 3 % 8 ADP OK After adaptation, the adaptation step counter reaches the number 8 (it is OK fo
Readiness code Page 13 of 47 4 indicates the specification "ADP OK" after adaptation. If specified value "ADP OK" is obtained: - Press -C- button. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Readiness code Page 14 of 47 01-87 Work step 4: Kick down function, adapting Test requirement Engine not running, ignition switched on. Initiate basic setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -6- and -3- to select "display group number 063" and press -Q- button to confirm input.
Readiness code Page 15 of 47 01-88 Display fields 1 2 3 4 Display group 063: Kick down function, adapting Display xx % xx % Kick down --- Indicated Sensor 1 for Sensor 2 for Kick down Adaptation condition Pedal position Pedal position 0 to 100 % 0 to 50 % Kick down operate Functional range ADP in progress ADP OK ADP ERROR Specified value 12 to 97 % Notes 4 to 49 % Kick down ADP OK If "ADP ERROR." is displayed: Check DTC memory Page 01-15 .
Readiness code Page 16 of 47 If specified value "ADP OK" is obtained: - Press -C- button. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Readiness code Page 17 of 47 01-89 Work step 5: Check operating condition of oxygen sensor control - Start engine (for a vehicle with manual transmission: engage clutch). Note: After starting engine, it may be necessary to select the Engine Control Module (ECM) again using "address word" 01 and the function "Initiate basic setting" using "04". - Install VAG1788/10 RPM adjuster on the accelerator pedal and raise the engine speed.
Readiness code Page 18 of 47 01-90 Display fields 1 2 3 4 Display group 030: Oxygen sensor status with engine at idle Display XXX XXX XXX XXX Indicated Oxygen sensor status, bank 1, sensor 1 Oxygen sensor status, bank 2, sensor 1 Oxygen sensor status, bank 2, sensor 1 Oxygen sensor status, bank 2, sensor 2 Functional range 0 = off 0 = off 0 = off 0 = off 1 = on 1 = on 1 = on 1 = on 111 110 111 110 Specified value Significance of 3 digit indications in display group 030 X X X D
Readiness code Page 19 of 47 0= not active 1 = active http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Readiness code Page 20 of 47 01-91 Work step 6: Diagnostic of oxygen sensor aging before catalytic converter Test requirement Engine continues to run at 2200 RPM. Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -3- and -4- to select "display group number 034" and press -Q- button to confirm input.
Readiness code Page 21 of 47 01-92 Display fields 1 2 3 4 Display group 034: Oxygen sensor aging diagnostic, oxygen sensor before catalytic converter (bank 1) Display xxxx/min Indicated Engine speed (RPM) Functional range 630 to 6800 RPM xxx C Exhaust temperature 70 to 850 C x.x s --- Period duration Oxygen sensor before Catalytic converter Diagnostic condition 0 to 3.0 s Test OFF Test ON B1-S2 OK B1-S2 not OK Specified value 2200 RPM Notes above 380 C 0.1 to 1.
Readiness code Page 22 of 47 - Press buttons -0-, -3- and -5- to select "display group number 035" and press -Q- button to confirm input. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Readiness code Page 23 of 47 01-93 If specified value "B2-S1 OK" is obtained: When indicated on display: System in Basic Setting 35 1 2 3 4 - Check specified value in display field 4. Display fields 1 2 3 4 Display group 035: Oxygen sensor aging diagnostic, oxygen sensor before catalytic converter (bank 2) Display xxxx/min Indicated Engine speed (RPM) Functional range 630 to 6800 RPM xxx C Exhaust temperature 70 to 850 C x.
Readiness code Page 24 of 47 01-94 Work step 7: Diagnostic of operational readiness of oxygen sensors behind catalytic converter Test requirement Engine continues to run at 2200 RPM. Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -3- and -6- to select "display group number 036" and press -Q- button to confirm input. When indicated on display: System in Basic Setting 36 1 2 3 4 - Check specified values in display fields 2 and 4. http://127.0.0.
Readiness code Page 25 of 47 01-95 Display fields 1 2 3 4 Display group 036: Operational readiness of the oxygen sensor behind catalytic converter (bank 1 and bank 2) Display x.xxx V --- x.xxx V --- Indicated Voltage of oxygen sensors behind catalytic converter, bank 1 Diagnostic condition Voltage of oxygen sensors behind catalytic converter, bank 2 Diagnostic condition Functional range 0.100 to 1.000 V Test OFF 0.100 to 1.000 V Test OFF Specified value smaller than 0.
Readiness code Page 26 of 47 01-96 Work step 8: Diagnostic of oxygen sensor control system Test requirement Engine continues to run at 2200 RPM. Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -3- and -7- to select "display group number 037" and press -Q- button to confirm input. When indicated on display: System in Basic Setting 37 1 2 3 4 - Check specified value in display field 4. http://127.0.0.
Readiness code Page 27 of 47 01-97 Display fields 1 2 3 4 Display group 037: Diagnostic of oxygen sensor control system (Bank 1) Display xxx % x.xxx volts xxx ms --- Indicated Load Voltage of oxygen sensors behind catalytic converter, bank 1 Oxygen sensor correction value between sensor 1 and sensor 2 (bank 1) Diagnostic condition Functional range 12 to 100 % 0.100 to 1.000 V -800 to 800 ms Test OFF Test ON System OK System not OK Specified value 12 to 26 % 0.100 to 1.
Readiness code Input display group number XXX Page 28 of 47 - Press buttons -0-, -3- and -8- to select "display group number 038" and press -Q- button to confirm input. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Readiness code Page 29 of 47 01-98 If specified value "Syst. OK" is obtained: When indicated on display: System in Basic Setting 34 1 2 3 4 - Check specified value in display field 4. Display fields 1 2 3 4 Display group 038: Diagnostic of oxygen sensor control system (Bank 2) Display xxx % x.
Readiness code Page 30 of 47 01-99 Work step 9: Diagnostic of oxygen sensor aging behind catalytic converter Test requirement Engine continues to run at 2200 RPM. Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -4- and -3- to select "display group number 043" and press -Q- button to confirm input. When indicated on display: System in Basic Setting 43 1 2 3 4 - Check specified value in display field 4. http://127.0.0.
Readiness code Page 31 of 47 01-100 Display fields 1 2 3 4 Display group 043: Oxygen sensor aging diagnostic, oxygen sensor behind catalytic converter (bank 1) Display xxxx/min Indicated Engine speed (RPM) Functional range 630 to 6800 RPM xxx x.x s --- Voltage of oxygen sensors behind catalytic converter, bank 1 Diagnostic condition 0.100 to 1.000 V Test OFF C Exhaust temperature 70 to 850 C Test ON B1-S2 OK B1-S2 not OK Specified value 2200 RPM above 380 C 0.100 to 1.
Readiness code Page 32 of 47 and press -Q- button to confirm input. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Readiness code Page 33 of 47 01-101 If specified value B2-S2 OK" is obtained: When indicated on display: System in Basic Setting 44 1 2 3 4 - Check specified value in display field 4. Display fields 1 2 3 4 Display group 044: Oxygen sensor aging diagnostic, oxygen sensor behind catalytic converter (bank 2) Display xxxx/min Indicated Engine speed (RPM) Functional range 630 to 6800 RPM xxx C Exhaust temperature 70 to 850 C x.
Readiness code Page 34 of 47 01-102 Work step 10: Diagnostic of catalytic converter Test requirement Engine continues to run at 2200 RPM. Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -4- and -5- to select "display group number 046" and press -Q- button to confirm input. When indicated on display: System in Basic Setting 46 1 2 3 4 - Check specified value in display field 4. Note: Catalytic converter diagnostic lasts approx. 60 seconds.
Readiness code Page 35 of 47 01-103 Display fields 1 2 3 4 Display group 046: Diagnostic of catalytic converter (bank 1) Display xxxx/min Indicated Engine speed (RPM) Functional range 630 to 6800 RPM x.x s --- Exhaust temperature Catalytic converter conversion Diagnostic condition 70 to 850 0.00 to 0.99 Test OFF xxx C C Test ON Cat B1 OK Cat B1 not OK Specified value 2200 RPM above 420 C Cat B1 OK 0.00 to 0.52 1) 0.00 to 0.
Readiness code Page 36 of 47 01-104 If specified value "Cat B1 OK" is obtained: - Press -C- button. Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -4- and -7- to select "display group number 047" and press -Q- button to confirm input. When indicated on display: System in Basic Setting 47 1 2 3 4 - Check specified value in display field 4. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Readiness code Page 37 of 47 01-105 Display fields 1 2 3 4 Display group 047: Diagnostic of catalytic converter (bank 2) Display xxxx/min Indicated Engine speed (RPM) Functional range 630 to 6800 RPM x.x s --- Exhaust temperature Catalytic converter conversion Diagnostic condition 70 to 850 0.00 to 0.99 Test OFF xxx C C Test ON Cat B2 OK Cat B2 not OK Specified value 2200 RPM above 420 C Cat B2 OK 0.00 to 0.52 1) 0.00 to 0.
Readiness code Page 38 of 47 If specified value "Cat B2 OK" is obtained: - Press -C- button. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Readiness code Page 39 of 47 01-106 Work step 11: Diagnostic of tank ventilation valve - Remove the VAG1788/10 RPM adjuster and leave engine running at idle. Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -7- and -0- to select "display group number 070" and press -Q- button to confirm input. When indicated on display: System in Basic Setting 70 1 2 3 4 - Check specified value in display field 4.
Readiness code Page 40 of 47 01-107 Display fields 1 2 3 4 Display group 070: Diagnostic of tank ventilation valve Display xx % xx.x % g/s --- Indicated Degree tank ventilation valve is opened Oxygen sensor control deviation Deviation of Idle control Diagnostic condition Functional range 0 to 99 % -25.0 to 25.0 % Test OFF Test ON TVV OK TVV not OK Aborted Specified value Notes 0 to 99 % -7.0 to 7.0 % TVV OK x.
Readiness code Page 41 of 47 - Press button. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Readiness code Page 42 of 47 01-108 Work step 12: Diagnostic of tank seal Test requirements Engine running at idle: Intake Air Temperature (IAT) less than 95 C display group 004, display field 4. Coolant temperature at least 80 Display group 4, display field 3 C Fuel filler cap opened briefly (to reduce pressure). Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -7- and -1- to select "display group number 071" and press -Q- button to confirm input.
Readiness code Page 43 of 47 01-109 - Check specified value in display field 4 after indication "Test ON" appears: Display fields 1 2 3 4 Display group 071: Diagnostic of tank seal Display --- --- --- --- Indicated Condition ReedTerminal DTC message System condition Diagnostic condition Functional range Reed open Small leak System test Test OFF Reed closed Large leak Measurement Test ON System not OK END Measurement System OK System not OK Aborted Aborted Specified value Reed o
Readiness code Page 44 of 47 01-110 Work step 13: Diagnostic of Secondary Air Injection (AIR) system Test requirement Engine running at idle: Note: During diagnostic of the Secondary Air Injection (AIR) system, the Secondary Air Injection (AIR) pump will run for several seconds. Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -7- and -7- to select "display group number 077" and press -Q- button to confirm input.
Readiness code Page 45 of 47 01-111 Display fields 1 2 3 4 Display group 077: Secondary Air Injection (AIR) system diagnostic Display xxxx/min xx.
Readiness code Page 46 of 47 If specified value "Syst. OK" is obtained: - Press Rapid data transfer HELP button. Indicated on display (function selection): Select function XX http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.
Readiness code Page 47 of 47 01-112 Work step 14: Readiness code, reading - Read readiness code http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.01.7 Page 01-78 .
Motronic injection system, servicing Page 1 of 78 24-1 Motronic injection system, servicing Safety precautions If special testing equipment is required during road test, note the following: WARNING! Scan tools and testing devices must always be secured on the rear seat and operated from there by a second person.
Motronic injection system, servicing Page 2 of 78 disconnect connector from ignition coils and from fuel injectors. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 3 of 78 24-2 It is possible that the control module will recognize a malfunction and store a DTC during some tests. After completing all tests and repairs, DTC memory should therefore be checked and erased if necessary. Readiness code must be generated after DTC memory is erased Page 01-82 . Always switch ignition off before cleaning engine.
Motronic injection system, servicing Page 4 of 78 24-3 Rules of cleanliness When working on the fuel supply or fuel injection systems, the following "6 rules of cleanliness" should be carefully observed: Thoroughly clean all connections and the surrounding area before disconnecting. Place parts that have been removed on a clean surface and cover. Use lint-free cloths only! Carefully cover opened components or seal them if repairs are not carried out immediately.
Motronic injection system, servicing Page 5 of 78 24-4 Technical data Engine identification ATQ (2.8 L / 5V/ 147 kW-engine) Idle speed Engine speed cannot be adjusted, it is regulated by idle stabilization 720 to 820 RPM (front wheel drive) 630 to 730 RPM (all wheel drive) Engine speed (RPM) limitation via fuel injector shut-off Fuel pressure at idle speed about 6800 RPM Vacuum hose connected 3.2 to 3.8 bar Vacuum hose disconnected Residual pressure after 10 min. Fuel injectors 3.8 to 4.
Motronic injection system, servicing 1) Page 6 of 78 With an engine at normal operating temperature, the resistance of the fuel injectors increases by approx. 4 to 6 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 7 of 78 24-5 Component locations, overview Notes: Other component Locations Fig. 7 , page Page 24-11 up to Fig. 12 , page Page 24-13 .
Motronic injection system, servicing Page 8 of 78 24-6 1 - 4-pin harness connector for Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC) -G130and Oxygen Sensor (O2S) Heater 1 -Z29(bank 1 sensor 2) green 2 - 4-pin harness connector for Oxygen Sensor (O2S) 2 behind Three Way Catalytic Converter (TWC) -G131and Oxygen Sensor (O2S) Heater 2 -Z30(bank 2 sensor 2) brown 3 - 4-pin harness connector for Heated Oxygen Sensor (HO2S) -G39before catalytic converter and Oxygen Sensor (O2S) Heater -Z19- (b
Motronic injection system, servicing Page 9 of 78 24-7 5 - Secondary Air Injection (AIR) solenoid valve -N1126 - Intake Air Temperature (IAT) sensor -G427 - 4-pin harness connector for Heated Oxygen Sensor (HO2S) 2 G108- before catalytic converter and Oxygen Sensor (O2S) 2 Heater -Z28(bank 2 sensor 1) Black 8 - 3-pin harness connector for engine speed (RPM) sensor -G28gray 9 - 3-pin harness connector for Knock Sensor (KS) 2 -G66blue http://127.0.0.
Motronic injection system, servicing Page 10 of 78 24-8 10 - E-box in plenum chamber Motronic Engine Control Module (ECM) J220Secondary Air Injection (AIR) Pump Relay J299- Fig.
Motronic injection system, servicing Page 11 of 78 24-9 17 - Engine Coolant Temperature (ECT) sensor -G62for Engine Control Module (ECM) At coolant line behind cylinder head engine bank 1 with Engine Coolant Temperature (ECT) Sensor -G2Checking Page 28-23 If necessary, release pressure in cooling system before removing 18 - Throttle valve control module -J338With throttle drive (power accelerator actuation) -G186-, angle sensor -1- for throttle drive (power accelerator actuation) -G187-, and angle sens
Motronic injection system, servicing Page 12 of 78 24-10 22 - Camshaft Position (CMP) sensor 2 -G40Bank 2 23 - Heated Oxygen Sensor (HO2S) 2 -G108before catalytic converter with Oxygen Sensor (O2S) 2 Heater -Z28Bank 2, sensor 1 24 - Knock Sensor (KS) 2 -G6625 - Ignition coils (-N-, -N128-, -N158-) with power output stage -N12226 - Knock Sensor (KS) 1 -G6127 - Fuel injectors -N30- through -N33,Cylinder 5/6 Fuel Injector -N83-, -N8428 - Valve -1- for camshaft adjustment -N20529 - Secondary Air Injection (A
Motronic injection system, servicing Page 13 of 78 24-11 Fig. 7 Component location, fault light for power accelerator activation -K132- Fig. 8 Installation position, Throttle Position (TP) sensor -G79and sender 2 for accelerator pedal position -G185- http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 14 of 78 24-12 Fig. 9 Component location Brake Light Switch -F- and Brake Vacuum Vent Valve Switch For Cruise Control/Diesel Fuel Injection, Clutch Vacuum Vent Valve Switch -F36- 1 - Clip 2 - Brake Light Switch -F-, Brake Vacuum Vent Valve Switch For Cruise Control/Diesel Fuel Injection -F473 - Clutch vacuum vent valve switch -F36Note: In order to assure sufficiently secure fitting, switches must not be installed more than once.
Motronic injection system, servicing Page 15 of 78 24-13 Fig. 11 Component locations Fuel Pump (FP) Relay -J17- Fuel Pump (FP) Relay -J17- is located at position 4 of central electrics in driver's footwell, left. Fig. 12 Component location of Data Link Connector (DLC) Data Link Connector (DLC) in knee bolster on driver's side. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 16 of 78 24-14 Air filter, disassembling and assembling 1 - Cover 2 - Air duct to metering unit 3 - Mass Air Flow (MAF) sensor -G704 - 10 Nm 5 - Connection hose 6 - Seal 7 - Air filter, upper portion 8 - Rubber grommet 9 - Filter element 10 - Air filter, lower portion http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 17 of 78 24-15 Intake manifold change-over components, removing and installing 1 - Vacuum setting element 2 - Compression spring 3 - Rotary change-over valve 4 - Intake Manifold 5 - Check-valve Installed position: blue side toward Y-piece 6 - Y-piece 7 - Intake manifold change-over valve -N156- http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 18 of 78 24-16 8 - 10 Nm 9 - Securing plate 10 - Rubber grommet 11 - Spacer sleeve 12 - Washer conical side toward intake manifold 13 - Seal Replace if damaged 14 - Seal for rotary change-over valve Replace if damaged 15 - 6 Nm http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 19 of 78 24-17 Wire and component test using VAG1598/31 test box Notes: VAG1598/31 test box is designed so that it can be simultaneously connected to the wiring harness at the Engine Control Module (ECM) and also to the ECM itself. This is advantageous because electronic engine control remains fully functional (e.g. measurement of signals with engine running) when the test box is attached.
Motronic injection system, servicing Page 20 of 78 24-18 Special Tools and Equipment VAG1598/31 Procedure - Switch ignition off. - Pull off rubber seal of plenum chamber cover in direction of arrow. - Remove cover -1- toward front. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 21 of 78 24-19 - Remove Heater Core E-box cover -arrows-. - Using a screwdriver, carefully pry off retaining bracket (arrow). - Disengage locking lugs and remove control module connector. Note: Adaptation values are erased when connector is disconnected from the Engine Control Module (ECM), DTC memory content remains intact. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 22 of 78 24-20 - Connect VAG1598/31 test box to connector of wiring harness. Ground (GND) clip at test box (not visible in illustration) must be connected to Ground (GND). Relevant test procedures note whether Engine Control Module (ECM) should also be connected to the test box. - Perform test as described in relevant repair sequence.
Motronic injection system, servicing Page 23 of 78 24-21 Engine Control Module (ECM), replacing Special Tools and Equipment VAS5051 with VAG5051/1 or VAG1551 with VAG1551/3B Removing - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 01-9 . Ignition must remain switched on for this. 3B0907551BA Coding 07252 2.8l V6/5V G 0003 WSC 12345 VAG1551 Scan Tool (ST) display indicates control module identification, e.g.
Motronic injection system, servicing Page 24 of 78 24-22 - Pull off rubber seal of plenum chamber cover in direction of arrow. - Remove cover -1- toward front. - Remove Heater Core E-box cover -arrows-. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 25 of 78 24-23 - Using a screwdriver, carefully pry off retaining bracket (arrow). - Disengage locking lugs and remove control module connector. - Remove Engine Control Module (ECM). Installing Installation is reverse of removal, noting the following: Important note: After installing new Engine Control Module (ECM), the following work steps must be performed: - Check DTC memory and erase it if necessary Page 01-15 .
Motronic injection system, servicing Page 26 of 78 24-24 - Observe notes for coding new Engine Control Module (ECM) Page 01-71 .
Motronic injection system, servicing Page 27 of 78 24-25 Idle speed (RPM), checking Special Tools and Equipment VAS5051 with VAG5051/1 or VAG1551 with VAG1551/3B Test requirements: Exhaust system free of leaks. Coolant Temperature at least 80 C. Electrical consumers switched off (radiator fan must NOT run during test). A/C switched off. No pressure gauge connected. Vehicles with automatic transmission Selector lever in P or N. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.
Motronic injection system, servicing Page 28 of 78 24-26 Notes: Idle speed cannot be adjusted. Idle speed is checked during basic setting of the engine. During basic setting, the Evaporative Emission (EVAP) canister purge regulator valve (EVAP valve -N80-) is closed and the A/C compressor is switched off Test sequence - Check DTC Memory Page 01-15 .
Motronic injection system, servicing Page 29 of 78 24-27 Basic Setting When indicated on display: Q Input display group number XXX - Press buttons -0-, -5- and -6- to select "display group number 056" and press -Qbutton to confirm input. When indicated on display: System in Basic Setting 56 1 2 3 4 - Check whether the engine speed in display field 1 (actual engine speed) is within tolerated range.
Motronic injection system, servicing 2) Page 30 of 78 All-Wheel Drive Vehicles http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 31 of 78 24-28 Notes: Engine speed in display field 1 (actual engine speed) is the current engine speed. Engine speed in display field 2 (specified engine speed) is a theoretical engine speed calculated by the ECM. At idle, the ECM always attempts to adapt the engine speed (actual) to the specified engine speed (specified). This means that the engine speed (actual) must always approximately match the engine speed (specified) at idle.
Motronic injection system, servicing Page 32 of 78 - If DTC memory was erased, readiness code must be re-generated Page 01-82 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 33 of 78 24-29 If idle speed is too high or low and there are no DTCs in DTC memory, the following tests (marked with dots) must be performed: False air in intake air system, checking Page 24-64 . Throttle valve control module, checking Page 24-141 . Evaporative Emission (EVAP) canister purge regulator valve always open, checking Page 24-128 . Perform adaptation of throttle valve control module Page 24-142 .
Motronic injection system, servicing Page 34 of 78 1 = selector lever in 2/3/4/D/R 0 0 0 A/C readiness maximum heating/cooling power Indication always 0 Indication always 0 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 35 of 78 24-30 Fuel pressure regulator and residual pressure, checking Note: Fuel pressure regulator regulates fuel pressure according to intake manifold pressure. This ensures that the pressure drop at the fuel injectors remains the same for each speed and load range of the engine.
Motronic injection system, servicing Page 36 of 78 24-31 WARNING! Fuel system is under pressure! Place a cloth around the connection point before opening system. Then release pressure by carefully loosening connection point. - Remove engine cover (arrows). Checking system pressure - Connect VAG1318 pressure gauge using adapters VAG1318/7, /1318/8 pressure hose with connectors and 1318/15 adapter in supply line.
Motronic injection system, servicing Page 37 of 78 24-32 - Measure fuel pressure. Specification: 3.8 to 4.2 bar - If the specified value is not reached, replace pressure regulator on a trial basis and repeat pressure test. - If the specified value is not reached again, check Fuel Pump (FP) or supply line for damage (e.g. pinched areas) and replace if necessary. - If the specified value is exceeded, check return line for damage (e.g. pinched areas) and replace if necessary.
Motronic injection system, servicing Page 38 of 78 etc.). - Connect vacuum hose at pressure regulator while observing pressure drop at pressure gauge. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 39 of 78 24-33 - Fuel pressure must drop by approx. 0.5 bar when connecting the vacuum hose. If the pressure change does not occur, the following tests must be performed: Check vacuum hose for tears and damage. Check vacuum hose at intake manifold for throughput by disconnecting from pressure regulator and blowing into it. - If no leaks can be detected and if the vacuum hose has throughput, replace the pressure regulator.
Motronic injection system, servicing Page 40 of 78 Note: Pressure increase for an engine at operating temperature limited by the fuel expansion is normal. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 41 of 78 24-34 - Start engine and let run at idle. - Wait until pressure has dropped, and then switch off ignition. Simultaneously close shut-off valve of VAG1318 pressure gauge (lever perpendicular to direction of flow -arrow-). The following malfunction are possible if the pressure does not drop: There is a leak in the threaded connection between the pressure gauge and the fuel supply line There is a leak at the supply line at fuel tank.
Motronic injection system, servicing Page 42 of 78 24-35 The following malfunctions are possible if the pressure drops again: Fuel pressure regulator faulty Fuel injectors not properly sealed Threaded connections of pressure gauge behind stopcock is not properly sealed. Note: Close stopcock for removing the pressure gauge, loosen threaded connection at VAG1318/15 adapter and let excess fuel escape into catch reservoir by opening stopcock. http://127.0.0.
Motronic injection system, servicing Page 43 of 78 24-36 Fuel injectors, checking Special Tools and Equipment VAG1526A VAG1527B VAG1594A VAG1598/31 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 44 of 78 24-37 Checking internal resistance - Remove engine cover (arrows). - Disconnect harness connector at the fuel injector to be tested. - Connect multimeter at valve for resistance measurement. Specification: 13.5 to 15.5 With an engine at operating temperature, the resistance increases by approx. 4 to 6 . If specified value is not obtained: - Replace fuel injector Page 24-43 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.
Motronic injection system, servicing Page 45 of 78 24-38 Checking voltage supply Test requirements: Fuel Pump (FP) OK, checking 49 . Page 24- Fuse for fuel injectors OK Electrical Wiring Diagrams, Troubleshooting & Component Locations binder - Disconnect harness connector at the fuel injector to be tested. - Connect VAG1527B voltage tester as follows: Harness connector Measure to Terminal 1 Engine Ground (GND) - Switch ignition on. LED must light up. If LED does not light up: http://127.0.0.
Motronic injection system, servicing Page 46 of 78 - Check wire connection between terminal 1 and fuse for injector valves for open circuit: Electrical Wiring Diagrams, Troubleshooting & Component Locations binder http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 47 of 78 24-39 - Repair open circuit if necessary. If LED lights up: Checking activation Test requirement: Internal resistance of valve OK - Slide back rubber grommet of fuel injector connector (arrow), but leave connector connected. - Connect VAG1527B voltage tester between sockets 2 (signal) and 1 (B+). - Operate starter briefly (engine can also start). LED must blink.
Motronic injection system, servicing Page 48 of 78 24-40 If LED does not blink: - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 . - Check the following wire connections for open circuit and short circuit to Ground (GND) and B+: Cylinder Fuel injector harness connector VAG1598/31 test box 1 Terminal Socket 2 96 2 2 112 3 2 88 4 2 97 5 2 113 6 2 89 - Repair open circuit or short circuit if necessary.
Motronic injection system, servicing Page 49 of 78 24-41 Fuel rail with fuel injectors, disassembling and assembling 1 - Fuel distributor 2 - to T-piece 3 - Retaining clip Check for secure fitting 4 - O-ring Removing and installing Page 24-43 Always replace Coat with clean engine oil 5 - Fuel pressure regulator http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 50 of 78 24-42 6 - O-ring Removing and installing Page 24-43 Always replace Coat with clean engine oil 7 - Fuel injectors -N30- through -N33,Cylinder 5/6 Fuel Injector -N83-, -N84Removing and installing Page 24-43 8 - Retaining clip Make sure clip is correctly seated on fuel injector and fuel rail http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 51 of 78 24-43 Fuel injectors, removing and installing - Remove engine cover (arrows). - Remove intake air hose between Mass Air Flow (MAF) sensor and intake air elbow. - Remove all harness connectors to injectors. - Disconnect vacuum hose from fuel pressure regulator. - Expose wires at fuel distributor. - Unscrew fuel distributor from intake manifold (arrows) .
Motronic injection system, servicing Page 52 of 78 24-44 - Disengage retaining clip and remove fuel injector. Note: Fuel lines must be disconnected before replacing fuel distributor. Installation is reverse of removal, noting the following: Remove O-rings at all opened connections. (Never remove plastic cap from valve head to replace front O-ring - pry O-ring off over plastic cap). Lightly lubricate O-rings with clean engine oil.
Motronic injection system, servicing Page 53 of 78 Component Nm Fuel distributor at intake manifold 10 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 54 of 78 24-45 Injection quantity, proper seal and spray pattern of fuel injectors, checking Special Tools and Equipment VAG1348/3A with VAG1348/3-2 VAG1594A VAG1598/31 VAG1602 VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 55 of 78 24-46 Test requirement: Fuel pressure OK, checking Page 24-30 . Test sequence - Remove fuel distributor including fuel injectors from intake manifold Page 24-43 . Fuel lines remain connected. - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Motronic injection system, servicing Page 56 of 78 24-47 Checking Proper Seal - Check proper seal of fuel injectors (visual inspection). With Fuel Pump (FP) running, only 1 to 2 drops per minute may drip out per injector. - If fuel loss is greater, stop Fuel Pump (FP) from running (disconnect cable bridge) and replace faulty fuel injector Page 24-43 . Checking Injection Quantity - Insert fuel injector to be tested in a measuring glass from VAG1602 injection quantity test device.
Motronic injection system, servicing Page 57 of 78 24-48 - Bridge terminals 1 and 65 at test box using wires from VAG1594A adapter test kit. Fuel Pump (FP) must run. - Operate VAG1348/3A remote control for 30 seconds. - After all three fuel injectors of one cylinder row have been activated, place measuring glasses on an even surface. Specified value for each fuel injector: 90 to 125 ml.
Motronic injection system, servicing Page 58 of 78 Also check spray pattern when checking injection quantity. Spray pattern must be the same for all injectors - Install fuel injectors together with fuel distributor Page 24-44 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 59 of 78 24-49 Fuel Pump (FP) relay -J17- and activation, checking Special Tools and Equipment VAG1526A VAG1594A VAG1598/31 VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 60 of 78 24-50 Voltage is supplied to the Fuel Pump (FP) and several components of the injection system via the Fuel Pump (FP) relay -J17-. Engine must be turning for Fuel Pump (FP) relay -J17- to close. This means that the relay does not receive Ground (GND) (via ECM) until the ECM recognizes RPM signals. Note: Fuel Pump (FP) relay is located at position 4 of central electrics in driver's footwell, left. Test requirement: Battery voltage at least 12.
Motronic injection system, servicing Page 61 of 78 24-51 Function test of Fuel Pump (FP) relay - Remove driver-side storage compartment. Repair Manual, Body-Interior, Repair Group 68; Instrument Panel; Removing Driver-Side Storage Compartment - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Ignition must remain switched on for this.
Motronic injection system, servicing Page 62 of 78 24-52 B - If relay triggers, but Fuel Pump (FP) does not run: - Check voltage supply for Fuel Pump (FP) and components (via Fuel Pump -FP- relay) Page 24-54 . Check voltage supply of Fuel Pump (FP) relay - Remove Fuel Pump (FP) relay. - Connect multimeter to terminal 17 of relay socket and Ground (GND) for voltage measurement. Specification: approx. battery voltage If specified value is not obtained: - Replace central electrics.
Motronic injection system, servicing Page 63 of 78 24-53 Fuel Pump (FP) relay (at position 4 of central electrics in driver's footwell, left) must trigger. If relay triggers now, but didn't during output DTM: - Replace Engine Control Module (ECM) Page 24-21 . If relay does not trigger: - Remove cable bridge. - Remove Fuel Pump (FP) relay. - Connect multimeter to terminal 19 of relay socket and Ground (GND) for voltage measurement. Specification: approx.
Motronic injection system, servicing Page 64 of 78 24-54 If specified value is obtained: - Check the following wire connection for open circuit and short circuit to Ground (GND) and B+: Central electric VAG1598/31 test box in driver-side footwell, left, position 4 Terminal Socket 16 65 - Repair open circuit or short circuit if necessary. If no malfunctions are detected: - Replace Fuel Pump (FP) relay -J17-. - Re-connect Engine Control Module (ECM).
Motronic injection system, servicing Page 65 of 78 24-55 - Connect multimeter for voltage measurement to Ground (GND) and to one terminal of the following fuses in the fuse holder. Fuse Specified value at one of the terminals S228 approx. battery voltage S229 approx. battery voltage S234 approx. battery voltage If specified values are not obtained: - Repeat test at another terminal of fuse socket. If specified values are not obtained again: - Check wire connections.
Motronic injection system, servicing Page 66 of 78 24-56 Mass Air Flow (MAF) sensor -G70-, checking Special Tools and Equipment VAG1526A VAG1594A VAG1598/31 VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 67 of 78 24-57 Test requirements: Coolant Temperature at least 80 C. Electrical consumers switched off (radiator fan must NOT run during test). A/C switched off. Fuse for Mass Air Flow (MAF) sensor OK Electrical Wiring Diagrams, Troubleshooting & Component Locations binder Checking function - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this.
Motronic injection system, servicing Page 68 of 78 button to confirm input. Note: During basic setting, the Evaporative Emission (EVAP) canister purge regulator valve (EVAP valve -N80-) is closed and the A/C compressor is switched off http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 69 of 78 24-58 Basic Setting When indicated on display: Q Input display group number XXX - Press buttons -0-, -0- and -2- to select "display group number 002" and press -Qbutton to confirm input. When indicated on display: System in Basic Setting 2 1 2 3 4 - Check specified values for load detection in display fields 3 and 4.
Motronic injection system, servicing 2) Page 70 of 78 All-Wheel Drive Vehicles http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Motronic injection system, servicing Page 71 of 78 24-59 If specified values are obtained: - Press Rapid data transfer button. Indicated on display (function selection): HELP Select function XX Evaluation display group 002 Display field: 3 less than 1.0 ms larger than 4.0 ms Possible cause Corrective action Smaller values are only possible when driving in deceleration mode Engine under load due to power accessories.
Motronic injection system, servicing Page 72 of 78 24-60 Evaluation display group 002 Display field: 4 Possible cause smaller than 1.0 g/s large false air mass between intake manifold and Mass Air Flow (MAF) sensor - Check intake system for leaks (false air) Page 24-64 Voltage supply of Mass Air Flow (MAF) sensor or wire connections to Engine Control Module (ECM) - Check voltage supply Engine under load due to power accessories.
Motronic injection system, servicing Page 73 of 78 24-61 Voltage supply for Mass Air Flow (MAF) sensor, checking - Disconnect connector from Mass Air Flow (MAF) sensor. - Connect multimeter for voltage measurement as follows. Harness connector Measure to Terminal 3 Engine Ground (GND) - Operate starter briefly. Specification: approx. battery voltage Note: Voltage is supplied to Mass Air Flow (MAF) sensor from Fuel Pump (FP) relay.
Motronic injection system, servicing Page 74 of 78 24-62 - Repair open circuit or short circuit if necessary. - Connect multimeter to terminal 2 and terminal 3 of connector for voltage measurement. - Operate starter briefly. Specification: approx. battery voltage Note: Ground (GND) from the ECM is present at terminal 2 of connector. If specified value is not obtained: - Check wire connections Page 24-63 . - Connect multimeter to terminal 1 and terminal 2 of connector for voltage measurement.
Motronic injection system, servicing Page 75 of 78 24-63 Check wire connections for Mass Air Flow (MAF) sensor Note: Signal wire is also checked during wire test. - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 . - Check the following wire connections for open circuit and short circuit to Ground (GND) and B+: Harness connector VAG1598/31 test box Terminal Socket 1 53 2 27 4 29 - Repair open circuit or short circuit if necessary.
Motronic injection system, servicing Page 76 of 78 24-64 Intake air system, checking for leaks (unmetered air) Special tools and equipment VAS5051 with VAG5051/1 or VAG1551 with VAG1551/3B Engine leak detection spray G 001 800 A1 Notes: The negative pressure in the intake system sucks in the leak detection spray with the unmetered air. Leak detection spray decreases ignition quality and performance of the fuel mixture. This causes a reduction in engine speed and a sharp increase of CO content.
Motronic injection system, servicing Page 77 of 78 24-65 Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -8- to select "Read Measuring Value Block" and press -Q- button to confirm input.
Motronic injection system, servicing Page 78 of 78 24-66 If engine speed does not change: - Press Rapid data transfer HELP button. Indicated on display (function selection): Select function XX If engine speed decreases: - Press button. - Press buttons -0- and -6- to select "End output" and press -Q- button to confirm input. - Switch ignition off. - Check sprayed part of intake system for leaks, and eliminate the error. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.
Intake manifold change-over Page 1 of 10 24-67 Intake manifold change-over This test should only be performed if there is a performance deficiency. The intake manifold switches from the long intake path to the short one at approx. 4700 RPM. Intake manifold change-over function, checking - Increase engine RPM significantly above 4700 RPM. This process should actuate the vacuum diaphragm for the intake manifold change-over. (Component location: on intake manifold front left, beneath ignition coils).
Intake manifold change-over Page 2 of 10 - Check whether the change-over mechanism moves easily (operate change-over linkage by hand). http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Intake manifold change-over Page 3 of 10 24-68 Vacuum system, checking for proper seal Special Tools and Equipment VAG1348/3-2 VAG1348/3A VAG1390 VAG1594A http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Intake manifold change-over Page 4 of 10 24-69 - Let vehicle run at idle for 2 to 3 minutes (vacuum build-up). - Switch ignition off. - Disconnect connector from Intake Manifold Change-Over Valve -N156-. - Connect one terminal of solenoid valve to engine Ground (GND) using an adapter cable and an alligator clip from VAG1594A connector test kit. - Connect the second terminal of solenoid valve to B+ using VAG1348/3A remote control, VAG1348/3-2 adapter cable and assisting cable.
Intake manifold change-over Page 5 of 10 24-70 - Check vacuum reservoir for proper seal. (Vacuum reservoir must not return to rest position, as long as the hand vacuum pump is not vented.) - Replace vacuum reservoir if necessary.
Intake manifold change-over Page 6 of 10 24-71 Intake manifold change-over valve -N156-, checking Special Tools and Equipment VAG1526A VAG1527B VAG1594A VAG1598/31 VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Intake manifold change-over Page 7 of 10 24-72 Component location Overview of component locations, page Page 24-5 Test requirement: Output Diagnostic Test Mode (DTM) performed Fuse for intake manifold change-over valve is OK Electrical Wiring Diagrams, Troubleshooting & Component Locations binder Fuel Pump (FP) OK, checking 49 . Page 24- Checking internal resistance - Disconnect connector from Intake Manifold Change-Over Valve -N156-. - Connect multimeter at valve for resistance measurement.
Intake manifold change-over Page 8 of 10 24-73 Checking voltage supply - Disconnect connector from Intake Manifold Change-Over Valve -N156-. - Connect VAG1527B voltage tester as follows: Harness connector Measure to Terminal 1 Engine Ground (GND) - Operate starter briefly. LED must light up. If LED does not light up: - Check wire connection from terminal 1 to Fuel Pump (FP) relay via fuse for open circuit. Electrical Wiring Diagrams, Troubleshooting & Component Locations binder http://127.0.0.
Intake manifold change-over Page 9 of 10 24-74 Checking activation - Connect VAG1527B voltage tester between terminals 1 and 2 - Initiate output Diagnostic Test Mode intake manifold change-over valve. Page 01-56 and activate the LED must blink. If LED does not blink or if it remains constantly lit: - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Intake manifold change-over Page 10 of 10 24-75 - Repair open circuit or short circuit if necessary. Electrical Wiring Diagrams, Troubleshooting & Component Locations binder If wire connection is OK: - Replace Engine Control Module (ECM) 24-21 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 1 of 63 24-76 Oxygen sensor control, checking Oxygen sensor control, function Notes: The oxygen sensors compare the oxygen content of the air with residual oxygen content in exhaust and deliver a voltage signal to the control module. The voltage signal "mixture rich (too little residual oxygen)" is approx. 0.7 to 1.0 V. The voltage signal "mixture lean (a lot of residual oxygen)" is approx. +0.0 to 0.3 V. At the transition from "rich" to "lean" and viceversa ( = 1.
Oxygen sensor control, checking Page 2 of 63 24-77 If voltage change does not occur or occurs only slowly, the following malfunctions could be present: Slits or holes in sensor head clogged. Sensors suffered thermal overload. Transition resistance in signal wire or Ground (GND) wire. Sensor too cold, sensor heating not functioning.
Oxygen sensor control, checking Page 3 of 63 24-78 Oxygen sensors and oxygen sensor control before catalytic converter, checking Special Tools and Equipment VAG1526A VAG1594A VAG1598/31 VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 4 of 63 24-79 Notes: For the defined troubleshooting procedure, it is possible, to switch oxygen sensor control off by selecting display group 099 under "basic setting" and switch it on again under "read measuring value block".
Oxygen sensor control, checking Page 5 of 63 24-80 Function test - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -4- to select "Initiate basic setting" and press -Qbutton to confirm input.
Oxygen sensor control, checking Page 6 of 63 "Oxygen sensor status" indicates status of oxygen sensor control and oxygen sensors. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 7 of 63 24-81 Display fields 1 2 3 4 Display group 030: Oxygen sensor status with engine at idle Display XXX XXX XXX XXX Indicated Oxygen sensor status, bank 1, sensor 1 Oxygen sensor status, bank 2, sensor 1 Oxygen sensor status, bank 2, sensor 1 Oxygen sensor status, bank 2, sensor 2 Functional range 0 = off 0 = off 0 = off 0 = off 1 = on 1 = on 1 = on 1 = on 111 110 111 110 Specified value Notes Meaning of display Page 01-90 If specifi
Oxygen sensor control, checking Page 8 of 63 24-82 Significance of 3 digit indication of display group 030 X X X Display fields 1 to 4 X Oxygen sensor control 0= not active 1 = active X Operational readiness of oxygen sensor 0= not active 1 = active X Condition of oxygen sensor heating 0= not active 1 = active Notes: The oxygen sensor control of the oxygen sensors behind catalytic converter (B1-S2 and B2-S2) are not active at certain operation points without engine load, that means that the third pos
Oxygen sensor control, checking Page 9 of 63 24-83 Checking oxygen sensor adaptation values and control - Press -C- button. Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -3- and -3- to select "display group number 033" and press -Q- button to confirm input. When indicated on display: System in Basic Setting 33 1 2 3 4 - Check oxygen sensor control in display fields 1 and 3. http://127.0.0.
Oxygen sensor control, checking Page 10 of 63 24-84 1 2 3 4 Display group 033: Oxygen sensor control before catalytic converter Display xx.x % x.xxx volts xx.x % x.xxx V Indicated Oxygen sensor control Bank1 Oxygen sensor voltage bank 1 Oxygen sensor control Bank2 Oxygen sensor voltage bank 2 Functional range -25.0 to 25.0 % 0.100 to 1.000 V -25.0 to 25.0 % 0.100 to 1.000 V Specified value Value must fluctuate by at least 2 % in the range 10.0 to 10.0 % Value must fluctuate approx.
Oxygen sensor control, checking Page 11 of 63 24-85 Evaluation display group 033 Display field: 1 / 3 Values in range: -10.0 to -25.0 % or Values in range: 10.0 to 25.
Oxygen sensor control, checking Page 12 of 63 24-86 - Press -C- button. - Press buttons -0-, -3- and -2- to select "display group number 032" and press -Q- button to confirm input. When indicated on display: System in Basic Setting 32 1 2 3 4 - Check oxygen sensor control in display fields 1 to 4: Display fields 1 2 3 4 Display group 032: Oxygen sensor adaptation values before catalytic converter Display xx.x % xx.x % xx.x % xx.
Oxygen sensor control, checking Page 13 of 63 24-87 Evaluation display group 032 Display field: 1 / 3 or 2 / 4 Oxygen sensor adaptation value in range: -10.0 to .-25.
Oxygen sensor control, checking Page 14 of 63 24-88 Evaluation display group 032 Display field: 1 / 3 or 2 / 4 Oxygen sensor adaptation value in range: 10.0 to 25.0 % Possible cause Corrective action False air in intake area - Check intake system for leaks and repair false air. Page 24-64 .
Oxygen sensor control, checking Page 15 of 63 24-89 Checking primary voltage Component location of harness connectors Overview of component locations, page Page 24-5 Note: Coolant reservoir screws must be removed and coolant reservoir must be placed to side in order to access this harness connector. The coolant hoses can remain connected. Test requirement: Fuse for oxygen sensor are OK - Disconnect 4-pin harness connector leading to respective oxygen sensor.
Oxygen sensor control, checking Page 16 of 63 2, page Page 24-91 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 17 of 63 24-90 Check oxygen sensor wires bank 1 for Heated Oxygen Sensor (HO2S) 2 -G39-. Component location of harness connectors Overview of component locations, page Page 24-5 - Disconnect black 4-pin harness connector to bank 1 Heated Oxygen Sensor (HO2S) -G39-. - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 . - Check the following wire connections for open circuit.
Oxygen sensor control, checking Page 18 of 63 24-91 - Check shielded wire for short circuit to sensor wires. Harness connector VAG1598/31 test box Terminal Socket 3 32 4 32 If no malfunctions are found in wires: - Replace Engine Control Module (ECM) Page 24-21 . Check oxygen sensor wires bank 2 for Heated Oxygen Sensor (HO2S) 2 -G108-.
Oxygen sensor control, checking Page 19 of 63 24-92 - Check the following wire connections for open circuit. Harness connector VAG1598/31 test box Terminal Socket 3 12 4 13 - Repair open circuit if necessary. - Check wires to each other for short circuit. Harness connector VAG1598/31 test box Terminal Socket 4 12 - Check shielded wire for short circuit to sensor wires.
Oxygen sensor control, checking Page 20 of 63 24-93 Oxygen sensor aging (oxygen sensor before catalytic converter), checking Special Tools and Equipment VAG1788/10 RPM adjuster VAS5051 with VAG5051/1 or VAG1551 with VAG1551/3B Test requirement: Coolant temperature at least 80 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 21 of 63 24-94 Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -4- to select "Initiate basic setting" and press -Qbutton to confirm input.
Oxygen sensor control, checking Page 22 of 63 24-95 Display fields 1 2 3 4 Display group 034: Oxygen sensor aging diagnostic, oxygen sensor before catalytic converter (bank 1) Display xxxx/min Indicated Engine speed (RPM) Functional range 630 to 6800 x.x s --- Exhaust temperature Period duration Oxygen sensor before Catalytic converter Diagnostic condition 70 to 850 C 0 to 3.0 s Test OFF xxx C Test ON B1-S2 OK B1-S2 not OK Specified value 1000 to 2400 RPM above 380 C Notes 0.
Oxygen sensor control, checking Page 23 of 63 - Press -C- button. Basic Setting Q When indicated on display: Input display group number XXX http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 24 of 63 24-96 - Press buttons -0-, -3- and -5- to select "display group number 035" and press -Q- button to confirm input. When indicated on display: System in Basic Setting 35 1 2 3 4 - Check specified value in display field 4. Note: The test in display group 035 is activated simultaneously with the test in display group 034 Therefore the test result is indicated immediately after display group 035 is selected.
Oxygen sensor control, checking Page 25 of 63 before catalytic converter (bank 1) http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 26 of 63 24-97 Oxygen sensor and oxygen sensor control behind catalytic converter, checking Special Tools and Equipment VAG1526A VAG1594A VAG1598/31 VAG1788/10 RPM adjuster VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 27 of 63 24-98 Notes: The oxygen sensor control behind catalytic converter overrules the oxygen sensor control before catalytic converter. It serves as a corrective control. It corrects slight changes in the mixture (i.e. enrichment) via the oxygen sensor before catalytic converter by holding oxygen sensor control before catalytic converter at its higher or lower point for a specific time (dwell time). If this time is in the positive range (i.e.
Oxygen sensor control, checking Page 28 of 63 24-99 Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -4- to select "Initiate basic setting" and press -Qbutton to confirm input.
Oxygen sensor control, checking Page 29 of 63 24-100 - Press -C- button. - Let engine continue to idle Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -3- and -0- to select "display group number 030" and press -Q- button to confirm input. When indicated on display: System in Basic Setting 30 1 2 3 4 - Check oxygen sensor status for oxygen sensor behind catalytic converter in display fields 2 and 4.
Oxygen sensor control, checking Page 30 of 63 24-101 Display fields 1 2 3 4 Display group 030: Oxygen sensor status with engine at idle Display XXX XXX XXX XXX Indicated Oxygen sensor status, bank 1, sensor 1 Oxygen sensor status Bank 2, sensor 1 Oxygen sensor status, bank 2, sensor 1 Oxygen sensor status Bank 2, sensor 2 Functional range 0 = off 0 = off 0 = off 0 = off 1 = on 1 = on 1 = on 1 = on 111 110 111 110 Specified value Notes Meaning of display Page 24-102 If specif
Oxygen sensor control, checking Page 31 of 63 The third position of the 3 digit indication (oxygen sensor control) fluctuates between 0 and 1. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 32 of 63 24-102 Significance of 3 digit indication of display group 030 X X X Display fields 1 to 4 X Oxygen sensor control 0= not active 1 = active X Operational readiness of oxygen sensor 0= not active 1 = active X Condition of oxygen sensor heating 0= not active 1 = active - Press -C- button.
Oxygen sensor control, checking Page 33 of 63 24-103 Display fields 1 2 3 4 Display group 043: Oxygen sensor aging, oxygen sensor behind catalytic converter (bank 1) Display xxxx/min Indicated Engine speed (RPM) Functional range 630 to 6800 RPM xxx C Exhaust temperature 70 to 850 C x.xxx V --- Voltage of oxygen sensor behind catalytic converter, bank 1 Diagnostic condition 0.100 to 1.000 volts Test OFF Test ON B1-S2 OK B1-S2 not OK Specified value 1800 to 2400 RPM above 380 C 0.
Oxygen sensor control, checking When indicated on display: System in Basic Setting 44 1 2 Page 34 of 63 3 4 - Check specified value in display field 4 after indication "Test ON" appears: http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 35 of 63 24-104 Display fields 1 2 3 4 Display group 044: Oxygen sensor aging, oxygen sensor behind catalytic converter (bank 2) Display xxxx/min Indicated Engine speed (RPM) Functional range 670 to 6800 RPM xxx C Exhaust temperature 70 to 850 C x.xxx V --- Voltage of oxygen sensor behind catalytic converter, bank 2 Diagnostic condition 0.100 to 1.000 volts Test OFF Test ON B2-S2 OK B2-S2 not OK Specified value 1800 to 2400 RPM above 380 C 0.
Oxygen sensor control, checking Page 36 of 63 24-105 Checking oxygen sensor control behind catalytic converter - Perform a test drive of approx. 10 minutes. WARNING! Observe safety precautions to reduce the risk of accidents during road test Page 24-1 . - Let engine continue to run at idle. Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -3- and -7- to select "display group number 037" and press -Q- button to confirm input.
Oxygen sensor control, checking Page 37 of 63 24-106 Display fields 1 2 3 4 Display group 037: Diagnostic, oxygen sensor control system (bank 1) Display xxx % Indicated Engine load Functional range 12.0 to 100.0 % x.xxx volts xxx ms Oxygen sensor voltage Oxygen sensor correction behind catalytic value between oxygen sensor converter, bank 1 1 and oxygen sensor 2, bank 1 0.100 to 1.000 V -800 to 800 ms --Diagnostic condition Test OFF Test ON System OK System not OK Specified value 12.
Oxygen sensor control, checking Page 38 of 63 is shifted in the -lean- direction. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 39 of 63 24-107 - Press -C- button. - Press buttons -0-, -3- and -8- to select "display group number 038" and press -Q- button to confirm input. When indicated on display: System in Basic Setting 38 1 2 3 4 - Check specified value in display field 4. Note: The test in display group 038 is activated simultaneously with the test in display group 037 Therefore the test result is indicated immediately after display group 038 is selected. http://127.0.0.
Oxygen sensor control, checking Page 40 of 63 24-108 Display fields 1 2 3 4 Display group 038: Diagnostic of oxygen sensor control system (Bank 2) Display xxx % x.xxx V xxx ms --- Indicated Engine load Oxygen sensor voltage behind catalytic converter, bank 2 Oxygen sensor correction value between oxygen sensor 2 and oxygen sensor 2, bank 1 Diagnostic condition Functional range 12.0 to 100.0 % 0.100 to 1.000 V -800 to 800 ms System OK System not OK Specified value 12.0 to 26.
Oxygen sensor control, checking Page 41 of 63 24-109 Evaluation of display group 037 and 038 Display field: 2 Possible cause constant about 0.450 V Open circuit in wire 4 between oxygen sensor and control module Corrective action - Check primary voltage Page 24-111 Open circuit in wire 3 between oxygen sensor and control module larger than 1.000 V smaller than 0.
Oxygen sensor control, checking Page 42 of 63 24-110 If specified value in display group 037 and 038 display field 3 or 4 is not obtained: - Search for leaking air at exhaust system or catalytic converter (check screw clamps and exhaust system for damage). - Check if possibly the oxygen sensors behind catalytic converter of cylinder bank 1 and 2 have been switched, in case of extremely different values (e.g.
Oxygen sensor control, checking Page 43 of 63 24-111 Checking primary voltage Component location of harness connectors Overview of component locations - page Page 24-5 - Disconnect 4-pin harness connector leading to respective oxygen sensor. - Connect multimeter between terminal 3 and 4 for voltage measurement. - Switch ignition on. Specification: 0.400 to 0.500 V - Switch ignition off. If specified value is not obtained: - Check oxygen sensor wires page Page 24-114 .
Oxygen sensor control, checking Page 44 of 63 24-112 Testing Oxygen Sensor Wires Component location of harness connectors Overview of component locations, page Page 24-5 - Disconnect green 4-pin harness connector 1 to Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-. - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 . - Check the following wire connections for open circuit.
Oxygen sensor control, checking Page 45 of 63 24-113 - Check shielded wire for short circuit to sensor wires. Harness connector VAG1598/31 test box Terminal Socket 3 32 4 32 If no malfunctions are found in wires: - Replace Engine Control Module (ECM) http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.3 Page 24-21 .
Oxygen sensor control, checking Page 46 of 63 24-114 Check oxygen sensor wires for Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-. Component location of harness connectors Overview of component locations, page Page 24-5 - Disconnect brown 4-pin harness connector 2 to Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-. - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Oxygen sensor control, checking Page 47 of 63 4 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 48 of 63 24-115 - Check shielded wire for short circuit to sensor wires. Harness connector VAG1598/31 test box Terminal Socket 3 32 4 32 If no malfunctions are found in wires: - Replace Engine Control Module (ECM) http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.3 Page 24-21 .
Oxygen sensor control, checking Page 49 of 63 24-116 Oxygen sensor heating for oxygen sensors before and behind catalytic converter, checking Special Tools and Equipment VAG1526A VAG1594A VAG1598/31 VAG1788/10 RPM adjuster VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 50 of 63 24-117 Note: The heating circuit of the oxygen sensor is monitored by On Board Diagnostic (OBD), Check DTC memory Page 01-15 . - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this.
Oxygen sensor control, checking Page 51 of 63 24-118 Display fields 1 2 3 4 Display group 041: Oxygen sensor heating (bank 1) at idle Display xxx kOhm --- xxx kOhm --- Indicated Bank 1, sensor 1 Condition of heating Bank 2, sensor 1 Condition of heating Functional range Specified value 0 to 0.9 kOhm Htng. bef. cat. ON Htng. beh. cat. ON Htng. bef. cat. OFF Htng. beh. cat. OFF Htng. bef. cat. ON/OFF 0 to 0.9 kOhm Htng. beh. cat.
Oxygen sensor control, checking Read Measuring Value Block Q Page 52 of 63 When indicated on display: Input display group number XXX - Press buttons -0-, -4- and -2- to select "display group number 042" and press -Qbutton to confirm input. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 53 of 63 24-119 When indicated on display: Read Measuring Value Block 42 1 2 3 4 - Check specified values in display fields 1 and 3. Display fields 1 2 3 4 Display group 042: Oxygen sensor heating (bank 2) at idle Display xxx kOhm --- xxx kOhm --- Indicated Bank 2, sensor 1 Condition of heating Bank 2, sensor 2 Condition of heating Functional range Specified value 0 to 0.9 kOhm Htng. bef. cat. ON Htng. beh. cat. ON Htng. bef. cat. OFF Htng.
Oxygen sensor control, checking Page 54 of 63 OFF" will appear in display fields 2 and 4 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 55 of 63 24-120 If specified value is not obtained: - Check voltage supply of oxygen sensor heating Page 24-121 . - Check oxygen sensor signal wire and activation Page 24-112 or Page 24-114 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 56 of 63 24-121 Checking voltage supply for oxygen sensor heating Test requirement: Fuse for oxygen sensor heating OK Electrical Wiring Diagrams, Troubleshooting & Component Locations binder Fuel Pump (FP) OK, checking 49 . Page 24- Component location of harness connectors Overview of component locations, page Page 24-5 - Disconnect 4-pin harness connector leading to respective oxygen sensor. - Connect multimeter between terminal 1 and 2 for voltage measurement.
Oxygen sensor control, checking Page 57 of 63 24-122 - Start engine. Specification: approx. battery voltage, possibly fluctuating Notes: At certain operating points, the ECM "pulses" the Ground (GND) for oxygen sensor heating. This means that the Ground (GND) is constantly switched on and off at these points. It is therefore possible that the voltage displayed on the tester will fluctuate.
Oxygen sensor control, checking Page 58 of 63 Specification: approx. battery voltage http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 59 of 63 24-123 If there is no voltage again: - Check wire connection from terminal 1 to Fuel Pump (FP) relay via fuse for open circuit. Electrical Wiring Diagrams, Troubleshooting & Component Locations binder If voltage supply is OK: - Connect multimeter for voltage measurement as follows: Harness connector Measure to Terminal 2 (Ground -GND- activation of Engine Control Module ECM-) B+ - Start engine. Specification: approx.
Oxygen sensor control, checking Page 60 of 63 24-124 - Check the following wire connection for open circuit: Oxygen Sensor (O2S) heater -Z19- bank 1 before catalytic converter: Harness connector VAG1598/31 test box Terminal Socket 2 5 Oxygen Sensor (O2S) heater -Z28- bank 2 before catalytic converter: Harness connector VAG1598/31 test box Terminal Socket 2 4 Oxygen Sensor (O2S) heater -Z29- bank 1 behind catalytic converter: Harness connector VAG1598/31 test box Terminal Socket 2 63 Oxygen Senso
Oxygen sensor control, checking Page 61 of 63 24-125 If no malfunctions are found in wires: - Replace appropriate Oxygen Sensor (O2S). - Read readiness code Page 01-78 . If DTC memory was erased, readiness code must be re-generated Page 01-82 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 62 of 63 24-126 Oxygen sensor, removing and installing Special tools and equipment 3337 wrench, 7-piece set Locking compound G 052 112 A3 Removing Component location of harness connectors locations, page Page 24-5 Overview of component - Disconnect 4-pin harness connector leading to respective oxygen sensor. - Open cable ties. - Unscrew oxygen sensor using special tool 3337. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Oxygen sensor control, checking Page 63 of 63 24-127 Installing Note the following when installing: Notes: Oxygen sensor threads are coated with an assembly paste. This paste must not contact sensor openings. Cable ties must always be installed again in exactly the same place to prevent the sensor wire from contacting the exhaust pipe. Tightening torque: 55 Nm http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Tank ventilation, checking Page 1 of 7 24-128 Tank ventilation, checking Evaporative Emission (EVAP) canister purge regulator valve -N80-, checking Special Tools and Equipment VAG1526A VAG1527B VAG1594A VAG1598/31 VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Tank ventilation, checking Page 2 of 7 24-129 Note: The Evaporative Emission (EVAP) canister purge regulator valve is also called the Tank Ventilation Valve (TVV) and is sometimes referred to as the EVAP valve. Checking for proper seal Solenoid valve is closed when no voltage is present. - Disconnect hoses from EVAP valve; harness connector remains connected. - Attach assisting hose to one connection of EVAP valve.
Tank ventilation, checking EVAP canister purge regulator valve -N80 Page 3 of 7 Valve must click... ...and must open and close (can be tested by blowing into assisting hose). http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Tank ventilation, checking Page 4 of 7 24-130 If valve does not click: - Check internal resistance of EVAP valve. If valve does not open and close properly: - Replace Evaporative Emission (EVAP) canister purge regulator valve -N80-. Checking internal resistance - Disconnect connector at EVAP valve. - Connect multimeter at valve for resistance measurement. Specification: 22 to 30 If specified value is not obtained: - Replace Evaporative Emission (EVAP) canister purge regulator valve N80-.
Tank ventilation, checking Page 5 of 7 24-131 Checking voltage supply Test requirements: Fuse for the EVAP valve OK. Electrical Wiring Diagrams, Troubleshooting & Component Locations binder Fuel Pump (FP) OK, checking 49 . Page 24- Note: Voltage is supplied to the EVAP valve via the Fuel Pump (FP) relay. - Disconnect connector at EVAP valve. - Connect VAG1527B voltage tester as follows: Harness connector Measure to Terminal 1 Engine Ground (GND) - Operate starter briefly (engine can also start).
Tank ventilation, checking Page 6 of 7 24-132 If LED does not light up: - Check wire connection from terminal 1 to Fuel Pump (FP) relay via fuse for open circuit. Electrical Wiring Diagrams, Troubleshooting & Component Locations binder - Repair open circuit if necessary. If LED lights up: - Checking activation. Checking activation - Connect VAG1527B voltage tester to connector terminals 1 (B+) and 2.
Tank ventilation, checking Page 7 of 7 24-133 If LED does not blink or if it remains constantly lit: - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 . - Check the following wire connection for open circuit and short circuit to Ground (GND) and B+: Harness connector VAG1598/31 test box Terminal Socket 2 64 - Repair open circuit or short circuit if necessary. If wire connection is OK: - Replace Engine Control Module (ECM) http://127.0.0.
Electronic engine power control (E-Gas), checking Page 1 of 41 24-134 Electronic engine power control (E-Gas), checking E-Gas system, function For E-Gas, the throttle valve is not operated by a cable from the accelerator pedal. There is no mechanical connection between the accelerator pedal and the throttle valve.
Electronic engine power control (E-Gas), checking Page 2 of 41 pedal position. This means, if the accelerator pedal is depressed half way, the throttle valve actuator opens the throttle valve to the same degree; i.e. throttle valve would be opened half way. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 3 of 41 24-135 With engine running (under load), the ECM can open or close the throttle valve independently of the sensor for accelerator pedal position. This means, for example, that the throttle valve could be fully opened even though the accelerator pedal has only been depressed half way. This has the advantage of preventing torque losses at the throttle valve.
Electronic engine power control (E-Gas), checking Page 4 of 41 24-136 Electronic Power Control (EPC) warning lamp -K132- in instrument cluster, significance "EPC" is an abbreviation and stands for Electronic Power Control (E-gas). Installation location of EPC warning lamp Engine Control Module (ECM) checks all components that are important for function of the E-Gas system after ignition is switched on. The Engine Control Module (ECM) switches on the EPC warning lamp after ignition is switched on.
Electronic engine power control (E-Gas), checking Page 5 of 41 24-137 Electronic Power Control (EPC) warning lamp -K132-, checking Note: The fault light for power accelerator activation K132- is also called the EPC warning lamp. Special Tools and Equipment VAG1594A VAG1598/31 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 6 of 41 24-138 Function test of warning lamp - Switch ignition on. Engine Control Module (ECM) switches EPC lamp on. - Start engine. Shortly after engine is started, the EPC warning lamp will go out if there are not malfunctions stored in DTC memory that relate to the E-gas system A- Fault light for power accelerator activation -K132- does not light up - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Electronic engine power control (E-Gas), checking Page 7 of 41 - Switch ignition off. - Remove instrument cluster: Repair Manual, Electrical Equipment, Repair Group 90, Instrument cluster, removing and installing http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 8 of 41 24-139 - Check the following wire connection for open circuit and short circuit to B+: Test box Instrument cluster VAG1598/31 Socket 48 Terminal Electrical Wiring Diagrams, Troubleshooting & Component Locations binder - Repair open circuit or short circuit if necessary. If wire connection is OK: - Replace Engine Control Module (ECM) 24-21 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 9 of 41 24-140 B- Fault light for power accelerator activation -K132- lights up constantly - Check DTC memory of Engine Control Module (ECM). If no DTCs are stored: - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Electronic engine power control (E-Gas), checking Page 10 of 41 Locations binder - Repair short circuit if necessary. If wire connection is OK: - Replace Engine Control Module (ECM) 24-21 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 11 of 41 24-141 Throttle valve control module -J338-, checking The following components are located in the housing for the throttle valve control module: Throttle drive (power accelerator actuation) G186-. (This is an electric motor that is activated by the ECM. This electric motor opens the throttle valve against spring pressure.
Electronic engine power control (E-Gas), checking Page 12 of 41 adjusted. Adjustment is performed in basic setting (function 04) using the VAS5051 tester or the VAG1551 Scan Tool (ST). http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 13 of 41 24-142 Throttle valve control module, adapting The adaptation teaches the Engine Control Module (ECM) various positions of the throttle valve when the ignition is on and the engine is stopped. These positions are stored in the control module The return communication regarding the position of the throttle valve occurs via the two angle sensors for throttle drive.
Electronic engine power control (E-Gas), checking Page 14 of 41 24-143 Note: Engine will not start during automatic adaptation. Special Tools and Equipment VAS5051 with VAG5051/1 or VAG1551 with VAG1551/3B Requirements No DTCs in DTC memory, check DTC memory Page 01-15 . Engine not running, ignition switched on. Accelerator pedal not depressed. Coolant temperature 10 to 95 Intake air temperature 10 to 90 C. C. Supply voltage for ECM larger than 12.7 V; checking http://127.0.0.
Electronic engine power control (E-Gas), checking Page 15 of 41 24-144 Procedure - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Ignition must remain switched on for this. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -4- to select "Initiate basic setting" and press -Qbutton to confirm input.
Electronic engine power control (E-Gas), checking Page 16 of 41 24-145 Next, the throttle valve is opened by a certain value. If this value is reached, the throttle valve actuator is once again de-energized. Now, the mechanical spring must close the throttle valve to the previously learned emergency position within a specified time (spring test).
Electronic engine power control (E-Gas), checking Page 17 of 41 24-146 Display fields 1 2 3 4 Display group 060: Adaptation of throttle valve control module Display Indicated Functional range xx % xx % Throttle Throttle valve angle valve angle (angle sensor 1) (angle sensor 2) 0 to 100% 0 to 100 % x --- Adaptation step counter Adaptation condition 0 to 8 ADP in progress ADP OK ADP ERROR Specified value 3 to 93 % Notes 97 to 3 % 8 ADP OK After adaptation, the adaptation step counte
Electronic engine power control (E-Gas), checking Page 18 of 41 4 indicates the specification "ADP OK" after adaptation. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 19 of 41 24-147 Note: The control module can abort adaptation for the following reasons: Throttle valve cannot be closed completely (e.g. contamination) Battery voltage is too low. Throttle valve control module or wire connection is faulty. Engine is started during adaptation or accelerator pedal is operated. Tension of throttle valve housing (check bolts) After termination, tester displays "Function is unknown or cannot be performed at the moment".
Electronic engine power control (E-Gas), checking Page 20 of 41 Select function XX http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 21 of 41 24-148 Angle sensor -1- for throttle drive, checking Special Tools and Equipment VAG1526A VAG1594A VAG1598/31 VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 22 of 41 24-149 Angle sensor 1 for throttle drive (power accelerator actuation) -G187- and angle sensor 1 for throttle drive (power accelerator actuation) G188- inform the Engine Control Module (ECM) about the position of the throttle valve. Both angle sensors are located in the throttle valve control module.
Electronic engine power control (E-Gas), checking Page 23 of 41 24-150 Display fields 1 2 3 4 xx % xx % Sensor for Sensor 2 for Display group 062: E-Gas potentiometer voltages Display Indicated Specified value Specified value xx % xx % Throttle valve angle Throttle valve angle (angle sensor 1) (angle sensor 2) 3 to 93 % 97 to 3 % (Idle value: 8 to 18 %) (Idle value: 80 to 90 %) 3 to 93 % 97 to 3 % Pedal position Pedal position 12 to 97 % 4 to 49 % 12 to 97 % 4 to 49 % Note: Engin
Electronic engine power control (E-Gas), checking Page 24 of 41 not be used completely during this. Percent indication in display field 2 must decrease uniformly. The tolerance range of 97 to 3% will not be used completely during this. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 25 of 41 24-151 Notes: The reason why the value indicated in display field 1 climbs, while the value indicated in display field 2 decreases, has to do with the fact that the potentiometers (angle sensors) in the throttle valve control unit run in opposite directions. This means that the voltage tap of angle sensor 1 runs from 0 to 5 volts. (The more the throttle valve is opened, the larger the voltage; percent indication climbs).
Electronic engine power control (E-Gas), checking Page 26 of 41 24-152 Check voltage supply throttle valve control module - Pull connector (2) off throttle valve control module. - Switch ignition on.
Electronic engine power control (E-Gas), checking Page 27 of 41 24-153 Checking wire connections - Pull connector (2) off throttle valve control module. - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 . - Check the following wire connections for open circuit and short circuit to Ground (GND) and B+: Harness connector VAG1598/31 test box Terminal Socket 1 92 2 83 3 117 4 84 5 118 6 91 - Repair open circuit or short circuit if necessary.
Electronic engine power control (E-Gas), checking Page 28 of 41 24-154 Throttle Position (TP) sensor, checking Special Tools and Equipment VAG1526A VAG1594A VAG1598/31 VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 29 of 41 24-155 Both the Throttle Position (TP) sensor -G79- and the Sender -2- for accelerator pedal position G185- are located at the accelerator pedal and communicate the driver's intentions to the ECM completely independently of each other. Both sensors are stored in one housing. Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019.
Electronic engine power control (E-Gas), checking Page 30 of 41 24-156 Display fields 1 2 3 4 xx % xx % Sensor for Sensor 2 for Display group 062: E-Gas potentiometer voltages Display Indicated xx % xx % Throttle valve angle Throttle valve angle (angle sensor 1) (angle sensor 2) Pedal position Pedal position Functional range 0 to 100 % 0 to 100 % 0 to 100 % 0 to 50 % Specified value 3 to 93 % 97 to 3 % 12 to 97 % 4 to 49 % (Idle value: 8 to 18 %) (Idle value: 3 to 13 %) Note: Eng
Electronic engine power control (E-Gas), checking Page 31 of 41 Percent indication in display field 4 must also rise uniformly. In the process, the tolerance range of 4 to 49% is not completely utilized. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 32 of 41 24-157 Note: The indicated value in display field 3 must always be about twice as large as the value in display field 4. If indications do not resemble description: - Check voltage supply and wire connections of sensor for accelerator pedal position Page 24-158 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 33 of 41 24-158 Checking voltage supply of Throttle Position (TP) sensor - Remove driver-side storage compartment. Repair Manual, Body-Interior, Repair Group 68; Instrument Panel; Removing Driver-Side Storage Compartment - Disconnect harness connector for accelerator pedal position sensor. - Switch ignition on.
Electronic engine power control (E-Gas), checking Page 34 of 41 - Also check signal wires. If specified values are not obtained: - Check wire connections from Engine Control Module (ECM) to sensors for accelerator pedal position. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 35 of 41 24-159 Checking wire connections - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 . - Check the following wire connection for open circuit and short circuit to Ground (GND) and B+: Harness connector VAG1598/31 test box Terminal Socket 1 72 2 73 3 36 4 35 5 33 6 34 - Repair open circuit or short circuit if necessary. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.
Electronic engine power control (E-Gas), checking Page 36 of 41 24-160 If no malfunctions are found in wires: - Replace accelerator pedal position sensor. Repair Manual, Fuel Supply System, Repair Group 20 Note: For vehicles with automatic transmission, the kick down function must be learned Page 24161 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Electronic engine power control (E-Gas), checking Page 37 of 41 24-161 Kick down function, adapting If the sensor for accelerator pedal position or the Engine Control Module (ECM) is replaced on a vehicle with automatic/variable transmission, the kick down function must be learned by the ECM. Special Tools and Equipment VAS5051 with VAG5051/1 or VAG1551 with VAG1551/3B Requirements No DTCs in DTC memory, check DTC memory Page 01-15 . Engine not running, ignition switched on.
Electronic engine power control (E-Gas), checking Page 38 of 41 24-162 Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -4- to select "Initiate basic setting" and press -Qbutton to confirm input. Basic Setting Q When indicated on display: Input display group number XXX - Press buttons -0-, -6- and -3- to select "display group number 063" and press -Q- button to confirm input.
Electronic engine power control (E-Gas), checking Page 39 of 41 24-163 Display fields 1 2 3 4 Display group 063: Kick down function, adapting Display xx % xx % Kick down --- Indicated Sensor 1 for Sensor 2 for Kick down Adaptation condition Pedal position Pedal position 0 to 100 % 0 to 50 % Kick down operate Functional range ADP in progress ADP OK ADP ERROR Specified value Notes 12 to 97 % 4 to 49 % Kick down ADP OK If "ADP ERROR." is displayed: Check DTC memory Page 01-15 .
Electronic engine power control (E-Gas), checking complete.In both cases, "Basic Setting" must be exited and the adaptation must be performed again http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.5 Page 40 of 41 Page 24-161 .
Electronic engine power control (E-Gas), checking Page 41 of 41 24-164 If specified value "ADP OK" is obtained: - Press Rapid data transfer HELP button. Indicated on display (function selection): Select function XX http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 1 of 44 24-165 Additional signals, testing Special Tools and Equipment VAG1526A VAG1527B VAG1594A VAG1598/31 VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 2 of 44 24-166 Engine speed signal, checking Note: The engine speed signal is output at terminal 37 of the Engine Control Module (ECM). The signal is used, among other things, for RPM display in the instrument cluster. - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Additional signals, testing Page 3 of 44 24-167 Consumption signal for on board computer, checking Notes: The consumption signal is calculated by the ECM from the injection time and directed to the on board computer via terminal 81 of the ECM. Consumption signal, checking Electrical Wiring Diagrams, Troubleshooting & Component Locations binder http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 4 of 44 24-168 Vehicle speed signal, checking Notes: The vehicle speed signal is generated by the Vehicle Speed Sensor (VSS) -G68- (at transmission) and processed in the instrument cluster. The processed signal enters at terminal 54 of the ECM and is used for idle stabilization and tip-in shock reduction during shifting. Test requirement: Function and display of speedometer OK.
Additional signals, testing Page 5 of 44 24-169 Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this. WARNING! Observe safety precautions to reduce the risk of accidents during road test Page 24-1 . Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -8- to select "Read Measuring Value Block" and press -Q- button to confirm input.
Additional signals, testing Page 6 of 44 24-170 - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 . - Connect VAG1527B voltage tester to sockets 3 (B+) and 54 (VSS) of VAG1598/31 test box. - Switch ignition on and turn front left wheel by hand. LED must blink (very brief blink signal).
Additional signals, testing Page 7 of 44 24-171 Wire for fuel level signal, checking Notes: The Engine Control Module (ECM) receives the fuel level signal from the instrument cluster. The processed signal enters at terminal 30 of the ECM and is used to determine the cause of certain recognized malfunctions (e.g. combustion misfires). - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Additional signals, testing Page 8 of 44 24-172 A/C compressor shut-off, checking Notes: The A/C compressor signal communicates to the ECM that the compressor will be switched on in 140 ms. The ECM can switch off the A/C compressor via the same wire connection.
Additional signals, testing Page 9 of 44 Vehicle at room temperature (warmer than +15 C). http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 10 of 44 24-173 Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -8- to select "Read Measuring Value Block" and press -Q- button to confirm input.
Additional signals, testing Page 11 of 44 24-174 - Depress gas pedal completely (swiftly) and then release it (brief acceleration). Specified value in display field 4: Indication jumps for a few seconds from "Compr. ON" to "Compr. OFF" (compressor is switched off when vehicle accelerates). If indications do not resemble description: - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Additional signals, testing Page 12 of 44 - If there are no malfunctions in the wiring, check function of A/C system. Repair Manual, Heating & Air Conditioning, Repair Group 01 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 13 of 44 24-175 A/C system signal, checking The A/C system signal notifies the Engine Control Module (ECM), that the A/C system requires a higher idle speed to achieve the desired interior temperature (regardless of whether heating or cooling is required). The increase in idle speed based on presence of the A/C system signal is control module dependent and occurs only in vehicles with All Wheel Drive (AWD) and manual transmission.
Additional signals, testing Page 14 of 44 24-176 If specified values are not obtained: Read Measuring Value Block When indicated on display: Q Input display group number XXX - Press buttons -0-, -5- and -6- to select "display group number 056" and press -Qbutton to confirm input. - Switch on A/C system, press "Auto" button and select the lowest temperature. - Check indications in display field 3 and 4.
Additional signals, testing Page 15 of 44 24-177 - Check the following wire connection for open circuit and short circuit to Ground (GND) and B+: Test box A/C control VAG1598/31 head -E87- Socket Terminal 40 Electrical Wiring Diagrams, Troubleshooting & Component Locations binder - Repair open circuit or short circuit if necessary. - If there are no malfunctions in the wiring, check function of A/C system. Repair Manual, Heating & Air Conditioning, Repair Group 01 http://127.0.0.
Additional signals, testing Page 16 of 44 24-178 Brake light switch and brake pedal switch, checking Note: For safety reasons, the instruction from the accelerator pedal sensor (potentiometer) to the ECM to open the throttle valve is suppressed when brake is being operated. This requires the brake light switch signal and also the brake pedal switch signal in the control module. If brake pedal is operated with accelerator pedal constantly depressed, engine is immediately regulated down to idle speed.
Additional signals, testing Page 17 of 44 24-179 Read Measuring Value Block When indicated on display: Q Input display group number XXX - Press buttons -0-, -6- and -6- to select "display group number 066" and press -Q- button to confirm input. Indicated on display: Read Measuring Value Block 66 1 2 3 4 - Check brake light/brake pedal switch in display field 2.
Additional signals, testing Page 18 of 44 Switch points slightly offset http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 19 of 44 24-180 If indications do not resemble description: Check switch - Remove driver-side storage compartment. Repair Manual, Body-Interior, Repair Group 68; Instrument Panel; Removing Driver-Side Storage Compartment - Disconnect harness connector at brake light switch and brake pedal switch. Note: Connector sockets are marked on the back side of the connector. - Connect multimeter between terminal 1 and 2 for resistance measurement.
Additional signals, testing Page 20 of 44 - Depress accelerator pedal. Specification: (no continuity) http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 21 of 44 24-181 If specified values are not obtained: - Check adjustment of switch or - Replace brake light switch / brake pedal switch. If specified values are obtained: Checking voltage supply - Connect VAG1527B voltage tester as follows: Harness connector Measure to Terminal 1 Chassis Ground (GND) LED must light up. - Switch ignition on. Harness connector Measure to Terminal 3 Chassis Ground (GND) LED must light up. http://127.0.0.
Additional signals, testing Page 22 of 44 24-182 If LED does not light up: - Check wire connection from terminal 1 or 3 of connector for open circuit and short circuit to Ground (GND): Electrical Wiring Diagrams, Troubleshooting & Component Locations binder - Repair open circuit or short circuit if necessary. If LED lights up: Checking activation - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Additional signals, testing Page 23 of 44 - Repair open circuit or short circuit if necessary. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 24 of 44 24-183 Clutch vacuum vent valve switch -F36-, checking Note: This signal helps prevent excessive RPM oscillations and tip-in shocks when clutch is disengaged and is required for the cruise control system. Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Ignition must remain switched on for this.
Additional signals, testing 1 2 3 Page 25 of 44 4 - Check Clutch Pedal Position (CPP) switch in display field 2. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 26 of 44 24-184 Display fields 1 2 3 4 xxx km/h XXXX Display group 066: Signals to Engine Control Module (ECM) Display xxx km/h XXXX Indicated ACTUAL speed Switch positions Functional range SPECIFIED speed Switch positions X0XX X1XX Specified value X0XX (at clutch pedal not operated) X1XX (at clutch pedal operated) Notes Value: X = no significance http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 27 of 44 24-185 If indications do not resemble description: Check switch - Remove driver-side storage compartment. Repair Manual, Body-Interior, Repair Group 68; Instrument Panel; Removing Driver-Side Storage Compartment - Disconnect harness connector at Clutch Pedal Position (CPP) switch. Note: Connector sockets are marked on the back side of the connector. - Connect multimeter between terminal 1 and 2 for resistance measurement. Specification: approx.
Additional signals, testing Page 28 of 44 If specified value is not obtained: - Check adjustment of switch or - Replace Clutch Pedal Position (CPP) switch. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 29 of 44 24-186 If specified value is obtained: Checking voltage supply - Connect VAG1527B voltage tester as follows: Harness connector Measure to Terminal 1 Chassis Ground (GND) - Switch ignition on. LED must light up. If LED does not light up: - Check wire connection from terminal 1 of connector to fuse for open circuit and short circuit to Ground (GND): Electrical Wiring Diagrams, Troubleshooting & Component Locations binder http://127.0.0.
Additional signals, testing Page 30 of 44 24-187 If LED lights up: Checking activation - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 . - Check the following wire connection for open circuit and short circuit to Ground (GND) and B+: Harness connector VAG1598/31 test box Terminal 2 Socket 39 - Repair open circuit or short circuit if necessary. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 31 of 44 24-188 Wire for crash signal, checking The Engine Control Module (ECM) receives the crash signal ("Crash shut-off was triggered") from the airbag control module. When the airbag control module sends the crash signal to the ECM (during an accident or when output DTM is being performed for the airbag system), the ECM switches the Fuel Pump (FP) off. This means that the engine will stop running but can be started again afterward (e.g. to remove vehicle from danger).
Additional signals, testing Page 32 of 44 24-189 - Repair open circuit or short circuit if necessary. Electrical Wiring Diagrams, Troubleshooting & Component Locations binder If no malfunctions are found in wire: - Check DTC memory of control module for airbag: Repair Manual, Body-On Board Diagnostic (OBD), Repair Group 01; On Board Diagnostic (OBD) of airbag system BAE (basic trigger unit) with side airbag; DTC memory, checking http://127.0.0.
Additional signals, testing Page 33 of 44 24-190 Rough terrain signal from ABS/EDL control module, checking Notes: When the ABS/EDL control module recognizes that a wheel is spinning, the ABS/EDL control module generates the rough terrain signal. When the Engine Control Module (ECM) recognizes the rough terrain signal, combustion misfire recognition is switched off in the Engine Control Module (ECM).
Additional signals, testing Page 34 of 44 24-191 Test requirement: Control module coding OK Page 01-71 . Test sequence - Switch ignition off. - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Additional signals, testing Page 35 of 44 replacing the ABS control module: - Replace Engine Control Module (ECM) 24-21 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 36 of 44 24-192 Data transfer between Engine Control Module (ECM) and CAN capable control modules, checking Notes: Data exchange between individual control modules occurs via a bus system. The term "CAN-bus" refers to a system that transports and distributes data. The wire connections between the control modules, via which data is transferred, are referred to as data wires.
Additional signals, testing Page 37 of 44 9. Ignition must remain switched on for this. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.24.
Additional signals, testing Page 38 of 44 24-193 Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -8- to select "Read Measuring Value Block" and press -Q- button to confirm input. Read Measuring Value Block Q When indicated on display: Input display group number XXX - Press buttons -1-, -2- and -5- to select "display group number 125" and press -Q- button to confirm input. - Check indications in display fields 1 through 4.
Additional signals, testing Page 39 of 44 24-194 Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -6- to select "End output" and press -Q- button to confirm input. Rapid data transfer HELP When indicated on display: Insert address word XX - Press button 0- twice to select "Automatic test sequence", address word 00. Press -Q- button to confirm input. DTC memory of all OBD capable systems in the vehicle will be checked.
Additional signals, testing Page 40 of 44 24-195 If the correct control modules are installed: - Check to be sure the multi-pin connectors of the control modules are securely connected. If multi-pin connectors are properly secured: - Check CAN bus system Checking a "two-line bus system" Three or more control modules are communicating across a "two-line bus system". - Analyze the DTCs stored in the memories of the control modules. Note: This analysis will help you locate the cause of the line malfunction.
Additional signals, testing Page 41 of 44 24-196 Example 1: From the DTCs stored in the memories, you have determined that control module 1 is not communicating with control modules 2 and 3. Control module DTCs stored in DTC memories: 1 Missing signal from control module 2 Missing signal from control module 3 2 3 Missing signal from control module 1 Missing signal from control module 1 - Switch ignition off.
Additional signals, testing Page 42 of 44 24-197 Example 2: From the DTCs stored in the memories, you have determined that control module 2 is not communicating with control modules 1 and 3. Control module DTCs stored in DTC memories: 1 2 Missing signal from control module 2 Missing signal from control module 1 Missing signal from control module 3 3 Missing signal from control module 2 - Switch ignition off.
Additional signals, testing Page 43 of 44 24-198 Example 3: Using the DTCs stored in the memories, you have determined that none of the control modules are sending or receiving signals. Control module DTCs stored in DTC memories: 1 2 3 Powertrain databus faulty Powertrain databus faulty Powertrain databus faulty - Switch ignition off. - Disconnect the control modules connected across the bus wires and check bus wires for a short circuit to B+ and Ground (GND).
Additional signals, testing Page 44 of 44 24-199 If you cannot determine a cause for the DTC "Powertrain databus malfunction, check whether the DTC is caused by one of the control modules. All control modules that use the CAN-bus are still disconnected. Ignition is switched off. - Connect one of the control modules. - Connect VAG 1551 scan tool. Switch ignition on, and erase the DTC memory of the control module you just connected. End scan tool output using the "End Output" function 06.
Ignition system, checking Page 1 of 65 28-1 Ignition system, checking General notes on ignition system The battery should only be disconnected and reconnected when the ignition is turned off, since otherwise the Engine Control Module (ECM) can be damaged. The Engine Control Module (ECM) is equipped with an On Board Diagnostic (OBD) For the electric components to work properly, a voltage of at least 12.7 V is required.
Ignition system, checking Page 2 of 65 28-2 Safety precautions To reduce the risk of personal injury and/or damage to the fuel injection and ignition system, always observe the following: Do not touch or pull off ignition wires when engine is running or turning at starting RPM. Always switch ignition off before disconnecting or reconnecting wires for the injection and ignition system, including high voltage wiring and test leads. If engine is to be cranked at starting RPM without starting (e.g.
Ignition system, checking Page 3 of 65 The battery should only be disconnected and reconnected when the ignition is turned off, since otherwise the Engine Control Module (ECM) can be damaged. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 4 of 65 28-3 Technical data, ignition Engine identification ATQ (2.
Ignition system, checking Page 5 of 65 28-4 Ignition system components, removing and installing 1 - Spark plug, 30 Nm Remove and install with 3122 B 2 - Spark plug connectors with ignition wires 3 - Spacer sleeve 4 - Rubber grommet 5 - 10 Nm 6 - Ignition coils (-N-, -N128-, -N158-) With power output stage -N122With marking for ignition wires, do not interchange http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 6 of 65 28-5 7 - 5-pin harness connector Black 8 - 3-pin harness connector Terminals are gold-plated 9 - 20 Nm Tightening torque affects function of Knock Sensor (KS) 10 - Knock Sensor (KS) 2 -G66Bank 2 Terminals of sensor and connector are gold-plated 11 - Knock Sensor (KS) 1 -G61Bank 1 Terminals of sensor and connector are gold-plated 12 - 10 Nm http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 7 of 65 28-6 13 - Camshaft Position (CMP) sensor 2 -G40Bank 2 14 - 25 Nm 15 - Washer Conical 16 - Face plate for Camshaft Position (CMP) sensor note position when installing 17 - 3-pin harness connector Black for Camshaft Position (CMP) sensor -G40or -G16318 - Camshaft Position (CMP) sensor 2 -G163Bank 1 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 8 of 65 28-7 Ignition coils, checking Special Tools and Equipment VAG1526A VAG1527B VAG1594A VAG1598/31 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 9 of 65 28-8 Component location Overview of Component Locations, page Page 24-5 Notes: Ignition coils and power output stage are a common part. Primary resistance of ignition coils cannot be measured. Secondary resistance must first be measured with the ignition wires connected to the ignition coils via the spark plug connectors of the corresponding cylinder (This measurement will include measurement of the shielded resistances of the ignition wires).
Ignition system, checking Page 10 of 65 - If the specified values are not reached, disconnect ignition wires from ignition coils and perform a separate resistance measurement at the ignition wires and at the ignition coils. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 11 of 65 28-9 - In order to perform a resistance measurement, connect multimeter between both ignition wire connectors connectors of the ignition coil to be checked. Specification: 8 to 14 k - In order to perform a resistance measurement, connect multimeter between both ignition wire connectors connectors of the ignition wire to be checked. Specification: 3 to 7 k - Replace faulty components if the specified values are not reached again. http://127.0.0.
Ignition system, checking Page 12 of 65 28-10 Checking Ground (GND) supply of power output stage - Connect VAG1527B voltage tester as follows: Harness connector Measure to Terminal 2 B+ LED must light up. If LED does not light up: - Check the wire connection for open circuit: Electrical Wiring Diagrams, Troubleshooting & Component Locations binder - Repair open circuit if necessary. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 13 of 65 28-11 Checking voltage supply to ignition coils Note: Voltage is supplied to ignition coils via Fuel Pump (FP) relay. Test requirement: Fuse for ignition coils OK Electrical Wiring Diagrams, Troubleshooting & Component Locations binder - Connect VAG1527B voltage tester as follows: Harness connector Measure to Terminal 1 Engine Ground (GND) - Operate starter. LED must light up. If LED does not light up: - Check the wire connection for open circuit: http://127.
Ignition system, checking Page 14 of 65 Electrical Wiring Diagrams, Troubleshooting & Component Locations binder - Repair open circuit if necessary. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 15 of 65 28-12 Checking activation - Disconnect connectors from all six fuel injectors. (afterward check DTC memory) - Connect VAG1527B voltage tester as follows: Harness connector Measure to Terminal 3 Engine Ground (GND) 4 Engine Ground (GND) 5 Engine Ground (GND) - Operate starter for a few seconds. LED must blink (brief blink signal). If specified values are not obtained: - Switch ignition off.
Ignition system, checking Page 16 of 65 28-13 - Check the following wire connections for open circuit and short circuit to Ground (GND) and B+: Harness connector VAG1598/31 test box Terminal Socket 3 102 4 103 5 94 - Repair open circuit or short circuit if necessary. If no malfunctions are found in wires: - Replace Engine Control Module (ECM) http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.1 Page 24-21 .
Ignition system, checking Page 17 of 65 28-14 Intake Air Temperature (IAT) sensor -G42-, checking Special Tools and Equipment VAG1526A VAG1594A VAG1598/31 VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 18 of 65 28-15 Component location Overview of Component Locations, page Page 24-5 Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Ignition must remain switched on for this. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -8- to select "Read Measuring Value Block" and press -Q- button to confirm input.
Ignition system, checking Page 19 of 65 28-16 Display fields 1 2 3 4 Display group 004: Intake Air Temperature (IAT), engine at idle Display xxxx/min xx.xxx volts Indicated Engine speed (RPM) Battery voltage Functional range 630 to 6800 RPM 10.000 to 15.000 V -48.0 to 143.0 C Specified value xxxx/min 12.000 to 15.000 V 80.0 to 110.0 C 1) Approximate values: While driving, up to 24 possible. xxx.x C xxx.x Coolant temperature C Intake Air Temperature (IAT) -48.0 to 143.
Ignition system, checking Page 20 of 65 28-17 Checking wire connections - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 . - Check the following wire connections for open circuit and short circuit to Ground (GND) and B+: Harness connector VAG1598/31 test box Terminal Socket 1 85 2 108 - Check both wires to each other for short circuit. - Repair open circuit or short circuit if necessary. http://127.0.0.
Ignition system, checking Page 21 of 65 28-18 If no malfunctions are found in wire: Check sensor: - Disconnect connector from Intake Air Temperature (IAT) sensor. - Connect multimeter at sensor for resistance measurement. Specified values Temperature C Resistance k -20 approx. 13.8 0 approx. 5.5 20 approx. 2.4 40 approx. 1.1 60 approx. 0.6 Example: If air temperature is in a range from 0 must be between 5 k and 2.
Ignition system, checking Page 22 of 65 28-19 Engine speed (RPM) sensor -G28-, checking Special Tools and Equipment VAG1526A VAG1594A VAG1598/31 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 23 of 65 28-20 Component location Overview of Component Locations, page Page 24-5 Note: The engine speed (RPM) sensor detects RPM and reference marks. The engine cannot be started without a signal from the engine speed (RPM) sensor -G28-. If the engine speed (RPM) sensor -G28- signal fails while the engine is running, the engine will stop immediately. Test sequence - Before performing test, check sensor for proper installation and proper fitting.
Ignition system, checking Page 24 of 65 28-21 If specified value is not obtained: - Replace engine speed (RPM) sensor. If specified value is obtained: - Connect multimeter to terminals 2 and 1 (shielding) and to terminals 3 and 1 (shielding) for resistance measurement. Specification: each (no continuity) If specified value is not obtained: - Replace engine speed (RPM) sensor. If specified value is obtained: - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Ignition system, checking Page 25 of 65 28-22 - Check the following wire connections for open circuit and short circuit to Ground (GND) and B+: Harness connector VAG1598/31 test box Terminal Socket 1 (shielding) 108 2 (Ground -GND-) 90 3 (signal) 82 - Repair open circuit or short circuit if necessary. If no malfunctions are found in wires: - Replace Engine Control Module (ECM) http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.1 Page 24-21 .
Ignition system, checking Page 26 of 65 28-23 Engine Coolant Temperature (ECT) sensor -G62-, checking Special Tools and Equipment VAG1526A VAG1594A VAG1598/31 VAS5051 with VAG5051/1 - or VAG1551 with VAG1551/3B http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 27 of 65 28-24 Component location Overview of Component Locations, page Page 24-5 Test requirement: Engine cold Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -8- to select "Read Measuring Value Block" and press -Q- button to confirm input.
Ignition system, checking Page 28 of 65 28-25 Display fields 1 2 3 4 Display group 004: Coolant temperature, engine at idle Display xxxx/min xx.xxx V Indicated Engine speed (RPM) Battery voltage Functional range 630 to 6800 RPM 10.000 to 15.000 V Specified value xxxx/min 12.000 to 15.000 V xxx.x xxx.x C Coolant temperature -48.0 to 143.0 Intake Air Temperature (IAT) -48.0 to 143.
Ignition system, checking Page 29 of 65 28-26 Coolant temperature sensor with square connector: - Connect multimeter between terminal 1 and 3 of connector for resistance measurement. Coolant temperature sensor with oval connector: - Connect multimeter between terminal 3 and 4 of connector for resistance measurement. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 30 of 65 28-27 All models Range A shows the resistance values for the temperature range from 0-50 C, and range B shows the values for the temperature range from 50-100 C. Read-out examples: 30 C corresponds to a resistance of 1500 to 2000 80 C corresponds to a resistance of 275 to 375 If specified value is not obtained: - Replace coolant temperature sensor.
Ignition system, checking Page 31 of 65 28-28 Coolant temperature sensor with square connector: - Check the following wire connections for open circuit and short circuit to Ground (GND) and B+: Harness connector VAG1598/31 test box Terminal Socket 1 (signal) 93 3 108 Coolant temperature sensor with oval connector: - Check the following wire connections for open circuit and short circuit to Ground (GND) and B+: Harness connector VAG1598/31 test box Terminal Socket 3 108 4 (signal) 93 http://12
Ignition system, checking Page 32 of 65 28-29 All models - Check both wires to each other for short circuit. - Repair open circuit or short circuit if necessary. If no malfunctions are found in wires: - Replace Engine Control Module (ECM) 24-21 . http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 33 of 65 28-30 Voltage supply for control module, checking Special Tools and Equipment VAG1526A VAG1594A VAG1598/31 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 34 of 65 28-31 Test requirements: Fuse for Engine Control Module (ECM) OK Electrical Wiring Diagrams, Troubleshooting & Component Locations binder Battery voltage at least 12.7 V Generator OK Test sequence - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 . - Switch ignition on. Note: The plus voltage supply for the Engine Control Module (ECM) travels via connector terminal 3 (terminal 15) and connector terminal 62 (terminal 30).
Ignition system, checking Page 35 of 65 Module (ECM) travels via connector terminal 1 and terminal 2. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 36 of 65 28-32 - Connect multimeter for voltage measurement as follows: VAG1598/31 test box Measure to Socket 1 B+ 2 B+ 62 Engine Ground (GND) Specification: approx. battery voltage - Connect multimeter for voltage measurement as follows: VAG1598/31 test box Measure to Socket 3 Engine Ground (GND) - Switch ignition on. Specification: approx. battery voltage If specified values are not obtained: http://127.0.0.
Ignition system, checking Page 37 of 65 - Check wire connections. Electrical Wiring Diagrams, Troubleshooting & Component Locations binder http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 38 of 65 28-33 Knock recognition control stop, checking The following tests must be performed when a DTC is stored that relates to "knock recognition control limit reached".
Ignition system, checking Page 39 of 65 28-34 Check ignition angle retardation of the individual cylinders - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -8- to select "Read Measuring Value Block" and press -Q- button to confirm input.
Ignition system, checking Page 40 of 65 28-35 Display fields 1 2 3 4 Display group 020: Ignition -knock control in driving operation Display xx.x Indicated KW Ignition angle retardation cylinder 1 via knock control Knock sensor control Specified value 0 to 12 KW xx.x KW Ignition angle retardation cylinder 2 via knock control Knock sensor control 0 to 12 KW Evaluation Notes xx.x KW Ignition angle retardation cylinder 3 via knock control Knock sensor control 0 to 12 KW xx.
Ignition system, checking Page 41 of 65 28-36 Display fields 1 2 3 4 Display group 021: Ignition -knock control in driving operation Display xx.x Indicated xx.
Ignition system, checking Page 42 of 65 28-37 Display fields 1 2 3 4 Display group 022: Ignition -knock control in driving operation Display xxxx/min xxx.x % Indicated Engine speed (RPM) Engine load Specified value xxxx/min 12 to 100 % xx.x xx.
Ignition system, checking Page 43 of 65 28-38 Display fields 1 2 3 4 Display group 023: Ignition -knock control in driving operation Display xxxx/min xxx.x % Indicated Engine speed (RPM) Engine load Specified value xxxx/min 12 to 100 % xx.x xx.
Ignition system, checking Page 44 of 65 28-39 Display fields 1 2 3 4 Display group 024: Ignition -knock control in driving operation Display xxxx/min xxx.x % Indicated Engine speed (RPM) Engine load Specified value xxxx/min 12 to 100 % Notes xx.x xx.
Ignition system, checking Page 45 of 65 28-40 Evaluation display groups 020/021/022/023/024 - ignition angle retardation Indicated on display All cylinders more than 12 Possible cause KW Knock sensor faulty Corrective action - Check knock sensor Page 28-41 Harness connector corroded One cylinder deviates significantly from the others Knock sensor incorrect tightening torque - Loosen knock sensors and tighten to 20 Nm Engine accessories loose - Secure engine accessories Poor fuel quality - Cha
Ignition system, checking Page 46 of 65 28-41 Knock sensors, checking Special Tools and Equipment VAG1526A VAG1594A VAG1598/31 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 47 of 65 28-42 Component location Overview of Component Locations, page Page 24-5 Notes: Knock Sensor (KS) 1 -G61- and Knock Sensor (KS) 2 -G66- themselves cannot be electrically tested. Use only gold-plated terminals when servicing harness connector for knock sensors. For the knock sensors to function properly, it is important that tightening torque be exactly 20 Nm. Check harness connector from knock sensor to wiring harness for corrosion.
Ignition system, checking Page 48 of 65 28-43 - Check all three terminals at knock sensor connector for short circuit to each other (terminal 1+2, 1+3, 2+3). Specification: (no continuity) - the wires must not have any connection to each other. - If there is no connection , replace knock sensor. - If no short circuit is detected, check knock sensor wires: Check wires from knock sensors to Engine Control Module (ECM). - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Ignition system, checking Page 49 of 65 28-44 Knock Sensor (KS) 2 -G66Harness connector VAG1598/31 test box Terminal Socket 1 (signal) 107 2 (Ground -GND-) 99 3 (shielding) 108 - Repair open circuit or short circuit if necessary. http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 50 of 65 28-45 Camshaft Position (CMP) sensor, checking Special Tools and Equipment VAG1526A VAG1527B VAG1594A VAG1598/31 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 51 of 65 28-46 Component location Overview of Component Locations, page Page 24-5 Notes: Camshaft Position (CMP) Sensor -G40- is located at rear of left cylinder block (bank 2). Camshaft Position (CMP) Sensor 2 -G163- is located at front of right cylinder block (bank 1). Checking activation - Slide back rubber grommet at connector of the respective Camshaft Position (CMP) Sensor (connector remains connected to Camshaft Position (CMP) Sensor).
Ignition system, checking Page 52 of 65 28-47 Note: Voltage testers do not go out completely during low current pick-up between activations by the ECM, but rather continue to glow a little and then get significantly brighter during activation. If LED does not blink: Checking voltage supply - Disconnect connector at respective Camshaft Position (CMP) sensor. - Switch ignition on.
Ignition system, checking Page 53 of 65 28-48 Checking signal wire - Connect multimeter for voltage measurement as follows: Harness connector Measure to Terminal 2 Engine Ground (GND) Specification: approx. battery voltage Checking Ground (GND) wire - Connect multimeter for voltage measurement as follows: Harness connector Measure to Terminal 3 B+ Specification: approx. battery voltage - Repair open circuit or short circuit if necessary.
Ignition system, checking Page 54 of 65 28-49 If specified values are not obtained: Checking wire connections between Camshaft Position (CMP) sensor and Engine Control Module (ECM) - Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM Page 24-17 .
Ignition system, checking Page 55 of 65 2 (signal) 87 3 (Ground -GND-) 108 http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 56 of 65 28-50 - Repair open circuit or short circuit if necessary. - If, after erasing DTC memory for the sake of the test, a DTC relating to the Camshaft Position (CMP) sensor (hall sensor) is indicated again, even though all previous tests were OK, the following malfunction is possible: Shutter wheel for Camshaft Position (CMP) sensor is not aligned properly.
Ignition system, checking Page 57 of 65 - Press buttons -0-, -9- and -3- to select "display group number 093" and press -Q- button to confirm input. When indicated on display: Read Measuring Value Block 93 1 2 3 4 - Check specified values of Camshaft Position (CMP) sensor http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 58 of 65 28-51 Display fields 1 2 3 4 Display group 093: Phase position of Camshaft Position (CMP) sensor bank 1 and bank 2 with engine at idle.
Ignition system, checking Page 59 of 65 If specified values are obtained: - Press Rapid data transfer HELP button. Indicated on display (function selection): Select function XX http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 60 of 65 28-52 Misfire recognition, checking Test sequence - Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01 Page 019. Engine must run at idle for this. Rapid data transfer HELP When indicated on display: Select function XX - Press buttons -0- and -8- to select "Read measuring value block" function 08. Press -Q- button to confirm input.
Ignition system, checking Page 61 of 65 28-53 Display fields 1 2 3 4 Display group 014: Misfire recognition Display xxxx/min xxx % xxx --- Indicated Engine speed (RPM) Load Number of combustion misfires Misfire recognition Functional range 670 to 6800 RPM 12 to 100 % activated locked Specified value 720 to 820 RPM 1) 12 to 26 % 0 to 12 activated 630 to 730 RPM 2) Notes If the specified value is exceeded: Check combustion misfires of the individual cylinders Page 28-54 1) Front W
Ignition system, checking Page 62 of 65 Select function XX http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5.FU05.28.
Ignition system, checking Page 63 of 65 28-54 Check misfire recognition of the individual cylinders. - Press -C- button. Read Measuring Value Block When indicated on display: Q Input display group number XXX - Press buttons -0-, -1- and -5- to select "display group number 015" and press -Q- button to confirm input. When indicated on display: Read Measuring Value Block 15 1 2 3 4 - Check misfire recognition in display fields 1 to 4.
Ignition system, checking Page 64 of 65 28-55 - Press -C- button. Read Measuring Value Block When indicated on display: Q Input display group number XXX - Press buttons -0-, -1- and -4- to select "display group number 014" and press -Q- button to confirm input. When indicated on display: Read Measuring Value Block 16 1 2 3 4 - Check misfire recognition in display fields 1 to 4.
Ignition system, checking Page 65 of 65 28-56 Evaluation display group 014, display field 3 and display group 015 and 016, display fields 1, 2 and 3 Indicated on display greater than 15 Possible cause Corrective action spark plug defective - Check spark plugs and ignition wires with connectors.
