User's Manual

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ESP

is a registered trademark of DaimlerChrysler and is used by BCVS under license.

SD-13-4986

The Bendix

ESP

EC-80

™

Controller

INTRODUCTION

The Bendix

ESP

EC‑80

™

Electronic Control Unit (ECU)

is a member of a family of three Bendix

‑brand electronic

Antilock Braking System (ABS) devices used to help

improve the braking characteristics of air‑braked heavy‑

and medium‑duty trucks, tractors, and buses:

1. The Bendix

ABS ESP

ECU uses wheel speed sensors

to monitor four wheel‑ends to detect wheel‑slip or wheel

lock‑up during braking. The system intervenes when

needed — using Pressure Modulator Valves (PMVs)

to adjust and/or pulse the brake pressure — in order

to optimize the contact between the tires and the road

surface.

2. The Bendix

Automatic Traction Control (ATC) EC‑80

™

ECU provides standard ABS; improves vehicle traction

during acceleration; and aid lateral stability while driving

through curves. The Bendix

ATC ECU communicates

with the engine’s Controller to provide Engine Torque

Limiting (ETL), and/or use Differential Braking (DB) to

make brake applications at individual wheels.

3. The Bendix ESP EC‑80 Controller provides — in

addition to the ABS and ATC functions described

above — advanced braking features referred to as the

Bendix

ESP

Electronic Stability Program. The Bendix

ESP EC‑80 Controller analyzes the vehicle's motion

compared to the driver's intended path and provides

Yaw Control (YC) and Roll Stability Program (RSP)

capabilities. When necessary, the system will intervene

to reduce the engine throttle, and/or apply the brakes

at one or more of the wheel ends — to help the vehicle

return to the intended direction.

TABLE OF CONTENTS Page

Components . . . . . . . . . . . . . . . . . . . . . 3‑4

Indicator Lamps and Power‑Up Sequence . . . . . 8‑9

ABS Operation. . . . . . . . . . . . . . . . . . . . 9‑10

ATC Operation. . . . . . . . . . . . . . . . . . . . 11‑12

ESP ABS With Stability Control . . . . . . . . . . . 12 ‑13

Important Safety Information About

The ESP Stability System . . . . . . . . . . . . . 13‑14

Troubleshooting . . . . . . . . . . . . . . . . . . . 17‑62

See page 63 for the full Table of Contents

Bendix

EC‑80

™

System Name

(Bendix

EC‑60

™

ECU)

Designations

Key Components

Key System Features

(ECU Designation Shown

on the ECU Label)

ECU

Connector

Locations

Provided

See

Service Data

Sheet

ABS “Standard”

ECU; Pressure Modulator Valves (PMVs);

Four Wheel Speed Sensors.

ABS [Antilock Braking]

(EC‑80 ABS)

Two SD‑13‑4983

ATC “Premium”

Items above, plus: Automatic Traction

Control (ATC) Valve; Option of two more

Wheel Speed Sensors and PMVs.

ABS plus ATC [Traction Control]

(EC‑80 ATC)

Three SD‑13‑4983

ESP

“Advanced”

All items above, plus: Yaw Rate Sensor;

Steering Angle Sensor; Load Sensor;

Steer‑axle ATC valve; Brake Demand

Sensor; and an Additional PMV

ABS plus ATC plus ESP

[Yaw Control (YC) and

Roll Stability Program (RSP

)].

(EC‑80 ESP)

Four

SD‑13‑4986

(This

Document)

The driver is always responsible for the control

and safe operation of the vehicle at all times. The

Bendix

ABS system does not replace the need

for a skilled, alert professional driver, reacting

appropriately and in a timely manner, and using

safe driving practices.

FIGURE 1 - THE BENDIX

ESP

EC‑80

™

CONTROLLER

Label Shows ECU

Designation

Summary of content (64 pages)

PAGE 1
SD-13-4986 ® The Bendix® ESP® EC‑80™ Controller Label Shows ECU Designation INTRODUCTION ® ® ™ The Bendix ESP EC‑80 Electronic Control Unit (ECU) is a member of a family of three Bendix® -brand electronic Antilock Braking System (ABS) devices used to help improve the braking characteristics of air-braked heavyand medium-duty trucks, tractors, and buses: 1. The Bendix® ABS ESP® ECU uses wheel speed sensors to monitor four wheel-ends to detect wheel-slip or wheel lock‑up during braking.
PAGE 2
GENERAL SAFETY GUIDELINES WARNING! PLEASE READ AND FOLLOW THESE INSTRUCTIONS TO AVOID PERSONAL INJURY OR DEATH: When working on or around a vehicle, the following guidelines should be observed AT ALL TIMES: ▲ Park the vehicle on a level surface, apply the parking brakes and always block the wheels. Always wear personal protection equipment. ▲ Stop the engine and remove the ignition key when working under or around the vehicle.
PAGE 3
For vehicles with the (optional) Hill Start Aid (HSA) system (sometimes referred to as a “Hill Start Assist”, or simply “Hill Start”), this feature interfaces between the transmission and the braking system. HSA helps the driver prevent the vehicle from rolling downhill when moving up a steep incline from a stationary position. See page 6 for more information.
PAGE 4
• Bendix® YAS-60™ or YAS-70X™ Yaw Rate/Lateral Acceleration Sensors (typically mounted to a crossmember near the back of the vehicle cab). See Figure 5.
PAGE 5
ABS OffRoad ATC Bendix ® HSA ATC Blink ESP/ eTrac™ Hill Start Mud/Snow Codes RSP Aid Feature system* Optional Optional Optional ModuRetarder Input Sensors PLC lators Relay Voltage (PMVs) 12/24 4/5/6 Serial Communication J1939 4/6 * For information about the Bendix ® eTrac™ automated air suspension transfer system, see SD-13-21021 FIGURE 7 - BENDIX® ESP® EC‑80™ CONTROLLER FEATURES BENDIX® ESP® EC‑80™ CONTROLLERS USE POWER LINE CARRIER (PLC) All new towing vehicles built since March 1, 2001, have
PAGE 6
Diagnostic Blink Code Switch Stop Lamp Switch (SLS) A momentary switch that grounds the ABS Indicator Lamp output is used to place the ECU into the diagnostic blink code mode and is typically located on the vehicle’s dash panel. The Bendix ESP EC‑80 Controller monitors the vehicle stop lamp status. Certain vehicle functions, such as ATC and All-Wheel Drive (AWD), use the status of the stop lamp to determine when the driver makes a brake application.
PAGE 7
The Bendix ® ESP ® EC‑80™ Controller also utilizes an additional Pressure Modulator Valve (PMV) for control of the trailer service brakes during stability interventions. Traction Control Valve (TCV) Bendix ESP EC‑80 Controllers use two TCVs, one on the steer axle and one on the drive axle. The TCV may be a separate valve or integrated into the rear axle relay valve. The Controller will activate the drive axle TCV during differential braking ATC events.
PAGE 8
INDICATOR LAMPS AND POWER-UP SEQUENCE NOTICE: The vehicle operator should Verify the proper operation of all installed indicator lamps (ABS, ATC/ESP, and trailer ABS) when applying ignition power and during vehicle operation. See Figure 10. Dash Lamp Behavior for the Bendix® ESP® EC‑80™ Controller ABS TRLR HSA ATC ABS Lamp Mode Lamps that do not illuminate as expected when ignition power is applied, or remain illuminated, indicate the need for maintenance.
PAGE 9
ABS Indicator Lamp Operation (Bulb Check) The Bendix® ESP® EC‑80™ Controller will illuminate the ABS Indicator Lamp for approximately three seconds when ignition power is applied, after which the lamp will extinguish if no Diagnostic Trouble Codes (DTCs) are detected. The Controller will illuminate the ABS Indicator Lamp whenever full ABS operation is not available due to a DTC. In most cases, partial ABS is still available.
PAGE 10
Single Drive Axle Control (4x2 Vehicle) For vehicles with a single rear drive axle (4x2), the brakes are operated independently by the Bendix® ESP® EC‑80™ Controller, based on the individual wheel behavior. Dual Drive Axle Control (4S/4M Configuration) For vehicles with dual drive axles (6x4) using a 4S/4M configuration, one ABS modulator controls both of the right-side rear wheels; the other modulator controls both of the left-side rear wheels.
PAGE 11
ATC OPERATION Disabling ATC Differential Braking ATC Functional Overview ATC differential braking is disabled under the following conditions: Just as ABS improves vehicle stability during braking, Automatic Traction Control (ATC) improves vehicle stability and traction during vehicle acceleration. The Bendix ® ESP® EC‑80™ Controller's ATC function uses the same wheel speed information and modulator control as the ABS function.
PAGE 12
Optional ATC Mud/Snow (Off-Road) Mode Drag Torque Control Functional Overview In some road conditions, the vehicle operator may desire additional drive wheel slip when ATC is active. The Bendix® ESP® EC‑80™ Controller has an optional control mode to permit this desired performance. Bendix ESP EC‑80 Controllers have a feature referred to as drag torque control which reduces wheel slip on a driven axle due to driveline inertia.
PAGE 13
Bendix® Roll Stability Program (RSP®) Bendix RSP — an element of the overall Bendix® ESP® system with the EC-80™ Controller — addresses rollover conditions. In the case of a potential roll event, the ECU will override the throttle and quickly apply brake pressure at all wheel ends to slow the vehicle combination. The level of braking application during an RSP event will be proportional to roll risk. See Figure 12.
PAGE 14
To Maximize The Effectiveness Of The Bendix® ESP® System with the EC‑80™ Controller: • Loads must be properly secured at all times. • Drivers need to exercise extreme caution at all times, plus avoid sharp turns, sudden steering adjustments or abrupt lane changes at high speeds, particularly if: › the vehicle hauls loads that could shift; › the vehicle or load has a high or off-set center of gravity (CG) when loaded; or › the vehicle tows doubles or triples.
PAGE 15
Acceptable Tire Sizes The speed calculation for an exciter ring with 100 teeth is based on a default tire size of 510 revolutions per mile. This figure is based on the actual rolling circumference of the tires, which varies with tire size, tire wear, tire pressure, vehicle loading, etc. The ABS response sensitivity is reduced when the actual rolling circumference is excessive on all wheels. For a 100 tooth exciter ring, the minimum number of tire revolutions per mile is 376, and the maximum is 665.
PAGE 16
SYSTEM RECONFIGURATION ® ® ™ The Bendix ESP EC‑80 Controller is designed to allow the technician to change the default system settings (chosen by the vehicle OEM) to provide additional or customized features. Depending on the model, the customizable features include ABS control settings, engine module communication etc. Many of these settings can be reconfigured using a handheld or PC-based software, such as the Bendix® ACom® Diagnostic software.
PAGE 17
Troubleshooting: General GENERAL SAFETY GUIDELINES Read and follow the General Safety Guidelines shown on page two (2) of this document. REMOVAL OF THE BENDIX® ESP® EC‑80™ CONTROLLER ASSEMBLY 1. Turn vehicle ignition off. 2. Remove as much contamination as possible prior to disconnecting electrical connections. 3. Note the Bendix ESP EC‑80 Controller assembly mounting position on the vehicle. 4. Disconnect the electrical connectors from the Controller. 5.
PAGE 18
STEERING ANGLE SENSOR MAINTENANCE Service Checks: 1. Check all wiring and connectors. Some installations also include an intermediate connector from the steering angle sensor to the main vehicle wire harness. Make sure all connections are free from visible damage. 2. Examine the sensor. Make sure the sensor, its mounting screws, and the interface between the hub and the steering column are not damaged.
PAGE 19
YAW RATE/LATERAL ACCELERATION SENSOR MAINTENANCE Different generations of yaw rate/lateral acceleration sensors are not compatible. Only replace these sensors with exactly the same device. Service Checks: 1. Check all wiring and connectors. Make sure all connections are free from visible damage. 2. Examine the sensor. Make sure the sensor, its mounting bolts, and the mounting bracket are not damaged. 3. Check the vent hole in underbody of sensor housing.
PAGE 20
BRAKE DEMAND SENSOR CALIBRATION Calibration must be performed under the following conditions: PRESSURE SENSOR INSTALLATION REQUIREMENTS • After servicing any pressure sensor related Diagnostic Trouble Codes (DTCs) • Replacement of any sensor The calibration procedure is performed using Bendix ® ACom® Diagnostic Software V6.7.2.5 (or higher). Service Checks: 1. Check all wiring and connectors. Make sure all connections are free from visible damage. 2. Examine the sensor.
PAGE 21
Troubleshooting: Blink Codes and Diagnostic Modes ELECTRONIC CONTROL UNIT (ECU) DIAGNOSTICS ® ® ™ The Bendix ESP EC‑80 Controller contains self-testing diagnostic circuitry that continuously checks for the normal operation of internal components and circuitry, as well as external ABS components and wiring. Active Diagnostic Trouble Codes (DTCs) When an erroneous system condition is detected, the Bendix ESP EC‑80 Controller: 1.
PAGE 22
Blink Code Timing DIAGNOSTIC MODES The Bendix ® ESP ® EC‑80™ Controller responds with a sequence of blink codes. The overall blink code response from the Electronic Control Unit (ECU) is called a “message.” Each message includes, depending on the mode selected by the technician, a sequence of one or more groups of blinks.
PAGE 23
Inactive Diagnostic Trouble Code Mode The Bendix ® ESP ® EC‑ 80™ Controller stores past Diagnostic Trouble Codes (DTCs) and comments (such as configuration changes) in its memory. This record is commonly referred to as “event history.” When an active DTC is cleared, the Electronic Control Unit (ECU) stores it in the event history memory as an inactive DTC. Using blink codes, the technician may review all inactive DTCs stored on the ECU.
PAGE 24
Troubleshooting: Using PC-Based or Hand-Held Diagnostic Tools BENDIX® ACOM® DIAGNOSTIC SOFTWARE LED lights illuminate Diagnostic Trouble Codes (10 locations in total) FIGURE 19 - THE BENDIX® REMOTE DIAGNOSTIC UNIT Features of the Bendix RDU Tool FIGURE 18 - BENDIX® ACOM® DIAGNOSTICS Bendix ® ACom ® Diagnostic Software is a PC-based program and is designed to meet RP-1210 industry standards developed by the Truck Maintenance Council (TMC).
PAGE 25
Typical Combination Diagnostic Trouble Codes (DTCs) are: • Right steer sensor • Left steer sensor • Right drive sensor • Left drive sensor • Right additional sensor • Left additional sensor • Right steer modulator • Left steer modulator • Right drive modulator • Left drive modulator • Right additional modulator • Left additional modulator • Rear Axle Traction modulator • ECU • Engine serial communication • MOD red LED illuminated, shows the "Common" connection of one or more modulators is shorted to ba
PAGE 26
Active or Inactive Diagnostic Trouble Codes (DTCs): INDEX How to interpret the first digit of messages received when Active or Inactive Diagnostic Trouble Code Mode is entered. 1st Blink Code Number Troubleshooting Tests 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No DTCs (1,1) 2. . . . . . . . . . . . . . Wheel Speed Sensors - pages 27-28 3. . . . . . . . . . . . . . Wheel Speed Sensors - pages 27-28 4. . . . . . . . . . . . . . Wheel Speed Sensors - pages 27-28 5. . . .
PAGE 27
Troubleshooting Diagnostic Trouble Codes (DTCs): Wheel Speed Sensors 1st. Blink Code Location 2 Left Steer Axle Sensor 3 Right Steer Axle Sensor 4 Left Drive Axle Sensor 5 Right Drive Axle Sensor 14 Left Additional Axle Sensor 15 Right Additional Axle Sensor 2nd. Blink Code 1 Diagnostic Trouble Code Description Repair Information Excessive Air Gap Adjust the sensor to contact the exciter ring. Rotate the wheel and verify a minimum of 0.25 VAC sensor output at ~ 0.5 RPS.
PAGE 28
Speed Sensor Repair Tests: 1. Take all measurements at the Electronic Control Unit (ECU) harness connector pins in order to the check wire harness and sensor. Probe the connector carefully so that the terminals are not damaged. 2. The wheel speed sensor measurements should read: Location Measurement Sensor 1500 - 2500 Ohms Sensor to voltage or ground Open Circuit (no continuity) Sensor output voltage >0.25 of VAC sensor output at ~ 0.5 revs/sec. 3. Clear the DTC after the issue is corrected.
PAGE 29
Troubleshooting Diagnostic Trouble Codes (DTCs): Power Supply 1st. Blink Code 6 Location Power Supply 2nd. Blink Code Diagnostic Trouble Code Description Repair Information 1 Battery Voltage Too Low Measure the battery voltage under load. Check the vehicle battery and associated components. Check for damaged wiring. Check for damaged or corroded connectors and connections. 2 Battery Voltage Too High Measure the battery voltage under load.
PAGE 30
Troubleshooting Diagnostic Trouble Codes (DTCs): Pressure Modulator Valves (PMVs) 1st. Blink Code 7 Left Steer Axle 8 Right Steer Axle 9 Left Drive Axle 10 Right Drive Axle 16 Left Additional Axle 17 Right Additional Axle 20 Trailer PMV 2nd. Blink Code 30 Location Diagnostic Trouble Code Description Repair Information 1 Release Solenoid Shorted to Ground Verify no continuity between the PMV leads and ground. Verify 4.9 to 5.5 ohms from REL to CMN & HLD to CMN, and 9.
PAGE 31
Pressure Modulator Valve (PMV) Repair Tests: 1. Take all measurements at the Electronic Control Unit (ECU) harness connector pins in order to check wire harness and PMV. Probe the connector carefully so that the terminals are not damaged. 2. The pressure modulator resistance should read: Location Measurement Release to Common 4.9 to 5.5 Ohms Hold to Common 4.9 to 5.5 Ohms Release to Hold 9.8 to 11.
PAGE 32
Troubleshooting Diagnostic Trouble Codes (DTCs): J1939 Serial Communications 1st. Blink Code 11 2nd. Blink Code J1939 Diagnostic Trouble Code Description Repair Information 1 J1939 Serial Link There is loss of communications between the Bendix ® ESP® EC‑80™ Controller and other devices connected to the J1939 link. Check for damaged or reversed J1939 wiring. Check for corroded or damaged connectors. Verify the Electronic Control Unit (ECU) configuration.
PAGE 33
2nd. Blink Code 15 16 20 21 22 23 Diagnostic Trouble Code Description Repair Information J1939 Electronic Engine There is loss of communications between the Bendix ® ESP® EC‑80™ Controller and Controller 3 Time‑out or the engine Electronic Control Unit (ECU) over the J1939 link. Check for damaged or reversed J1939 wiring. Check for corroded or damaged connectors. Verify the Invalid Signal presence of engine ECU on the J1939 link. Verify the ECU configuration.
PAGE 34
Troubleshooting Diagnostic Trouble Codes (DTCs): Miscellaneous 1st. Blink Code 12 2nd. Blink Code 34 Location: Miscellaneous Diagnostic Trouble Code Description Repair Information 1 Stop Lamp Switch Not Detected The Electronic Control Unit (ECU) has not detected the presence of the stop lamp switch since ignition power was applied (note that stop lamp switch input may be applied to the Bendix ® ESP ® EC‑80™ Controller using either hard-wire input or J1939). Apply and release service brake.
PAGE 35
2nd. Blink Code Diagnostic Trouble Code Description Repair Information 20 Maximum Number of TCV Cycles Exceeded 22 ESP Sensor Voltage Out of Range Incorrect supply voltage is detected for the Bendix ® SAS-60™ and the Yaw Rate sensor. Verify the proper voltage at sensor connectors. Verify wiring between the Electronic Control Unit (ECU) and the sensors. Verify the proper output voltage from ECU. Note: When checking for voltage at YAW/LAS & SAS, the voltage will only be present momentarily at key ON.
PAGE 36
Troubleshooting Diagnostic Trouble Codes (DTCs): ECU 1st.
PAGE 37
Troubleshooting Diagnostic Trouble Codes (DTCs): Traction Control Valves (TCV) 1st. Blink Code Location 18 Drive Axle Traction Control Valve 19 Steer Axle Traction Control Valve NOTE: When troubleshooting Traction Control Valve DTCs, it may be useful to look for a potential connection between them and ECU DTCs (in particular, DTCs 13-8 and 13-18 shown on page 36). 2nd.
PAGE 38
Troubleshooting Diagnostic Trouble Codes (DTCs): Steering Angle Sensor (SAS) [Bendix® SAS-60™ Sensor] 1st. Blink Location: Code Steering Angle Sensor 21 38 2nd. Blink Code Diagnostic Trouble Code Description 1 SAS Not Calibrated Steering Angle Sensor (SAS) has not been calibrated. Perform SAS calibration procedure. 2 SAS Calibration in Progress SAS calibration procedure is underway. 3 SAS Static Signal SAS signal incorrect. Verify the proper installation of the SAS.
PAGE 39
Troubleshooting Diagnostic Trouble Codes (DTCs): Steering Angle Sensor (SAS) [Bendix® SAS-60™ Sensor] (continued) Steering Angle Sensor (SAS) Connector Looking into wire harness connector (Note: When checking for voltage at YAW/LAS & SAS, the voltage will only be present momentarily at key ON). Steering Angle Sensor Tests 1. Measure resistance between input voltage and ground at the sensor wiring harness connector.
PAGE 40
Troubleshooting Diagnostic Trouble Codes (DTCs): Yaw Rate Sensor (YRS) 1st. Blink Code 22 2nd. Blink Code 40 Location: Yaw Rate Sensor Diagnostic Trouble Code Description Repair Information 1 YRS Signal Out of Range The YRS signal is incorrect. Verify the proper installation of the YRS. Verify proper wiring between the Electronic Control Unit (ECU) and the YRS. Check the YRS output. Perform the YRS calibration procedure. 2 YRS Sensor Reversed Signal The YRS signal is reversed.
PAGE 41
Troubleshooting Diagnostic Trouble Codes (DTCs): Yaw Rate Sensor (YRS) (continued) Yaw Connector Looking into wire harness connector (Note: When checking for voltage at YAW/LAS & SAS, the voltage will only be present momentarily at key ON.). Yaw Rate Sensor Tests 1. Verify continuity between the Electronic Control Unit (ECU) and the Yaw Rate Sensor (typically YAS-70 or YAS-60). Connector YRS ECU 12 Way X4 Pin Function 2 Voltage Input 1 Ground Input 11 Power 10 Common 4.
PAGE 42
Troubleshooting Diagnostic Trouble Codes (DTCs): Lateral Acceleration Sensor (LAS) 1st. Blink Code 23 Location: Lateral Acceleration Sensor 2nd. Blink Code Diagnostic Trouble Code Description Repair Information 1 LAS Signal Out of Range LAS signal incorrect. Verify the proper installation of the YRS/LAS. Verify proper wiring between the Electronic Control Unit (ECU) and the YRS/LAS. Check YRS/LAS output. Perform LAS calibration procedure.
PAGE 43
Troubleshooting Diagnostic Trouble Codes (DTCs): Brake Demand/Load Sensors 1st. Blink Code 24 2nd. Blink Code 1 2 3 4 5 6 7 8 9 Location: Brake Demand/ Load Sensor Diagnostic Trouble Code Description PS1 Open or Shorted PS2 Open or Shorted PS3 Open or Shorted PS1/2 Plausibility Error PS Supply Voltage Error PS Not Calibrated PS Error Repair Information Check wiring between Brake Demand Sensor (primary brake circuit) and Electronic Control Unit (ECU). Verify operation of pressure sensor.
PAGE 44
Troubleshooting Diagnostic Trouble Codes (DTCs): Valves Miscellaneous 1st. Blink Code 25 2nd. Blink Code 44 Location: Valves Diagnostic Trouble Code Description Repair Information 1 Differential Lock Solenoid Open Verify resistance between Diff solenoid and Diff common. Check for corroded /damaged wriing or connectors between the Electronic Control Unit (ECU) and the Diff solenoid. 2 Differential Lock Solenoid Shorted to Ground Verify no continuity between the Diff Lock Solenoid and ground.
PAGE 45
Troubleshooting Diagnostic Trouble Codes (DTCs): Bendix® ESP® system-related 1st. Blink Location: Code 2nd. J1939 Bendix® ESP® Diagnostic Trouble Code 26 Blink system-related Description Code Repair Information 1 J1939 CAN Time‑out of ESP Message Check for damaged or reversed J1939 wiring. Check for damaged or corroded connectors. Verify message is being transmitted on J1939 link.
PAGE 46
Troubleshooting Diagnostic Trouble Codes (DTCs): J1939 Bendix® ESP® system-related (continued) 1st. Blink Code 26 Location: J1939 Bendix® ESP® system-related 2nd. Blink Code 46 Diagnostic Trouble Code Description Repair Information 12 Time‑out or invalid data for Configuration of Electronic Engine Controller 1 ESP Message Check for damaged or reversed J1939 wiring. Check for damaged or corroded connectors. Verify the presence of engine on J1939 link. Verify that the message is being transmitted.
PAGE 47
Troubleshooting Diagnostic Trouble Codes (DTCs): J1939 Bendix® ESP® system-related (continued) 1st. Blink Code 26 2nd. Blink Code Location: J1939 ESP-related Diagnostic Trouble Code Description Repair Information 23 Time‑out or invalid CAN data – CCVS ESP Message Check for damaged or reversed J1939 wiring. Check for damaged or corroded connectors. Verify message is being transmitted on J1939 link. Verify data for park brake, brake lamp switch, clutch and tachograph.
PAGE 48
Troubleshooting: Connectors Bendix® ESP® EC‑80™ Controller Wire Harness Connector Part Numbers and Pin Assignments: X1 X2 X3 X4 CONNECTOR CONNECTOR CONNECTOR CONNECTOR Bendix ESP EC‑80 Controller Controllers utilize four (4) AMP connectors for wire harness connections.
PAGE 49
Troubleshooting: Wiring ABS/ATC WIRING Electronic Control Unit (ECU) Wiring Harness Connectors ® ® ™ The Bendix ESP EC‑80 Controller is designed to interface with AMP MCP 2.8 connectors as referenced in Figure 21. Follow all AMP requirements for the repair of wire harnesses. All wire harness connectors must be properly seated. The use of secondary locks is strongly advised. All wires must be carefully routed to avoid contact with rotating elements.
PAGE 50
ABS Component In-Cab Controller Harness 17-Way AMP MCP 2.8 (X1) In-Cab Controller Harness 18-Way AMP MCP 2.8 (X2) In-Cab Controller Harness 15-Way AMP MCP 2.8 (X3) Connector Wire Terminal 1718091-1 927768-9 1 - 2.5 mm2 X1-12 & 18 Terminal Lock Terminal Crimp Tool N/A 967634 8-968974-1 968874 2.5 - 4 mm2 N/A 8-968973-1 Controller Harness 12-Way AMP MCP 2.8 (X4) 539723-2 8-968972-1 ABS Modulator Harness AMP Twist-Lock (Bayonet) Wire Seal/ Plug 968873 1.0 - 2.
PAGE 51
Troubleshooting: Wiring (Continued) Speed Sensor Mounting Block Mounting Block Max. Gap (Sensor to Exciter) .015 Inches WS-24™ Speed Sensor 100 Tooth (typical) Speed Sensor Exciter Ring 100 Tooth Exciter Ring Brake Drum WS-24™ Speed Sensor Hub Assembly 90° Speed Sensors Sensor Clamping Sleeve Straight Speed Sensors Air Disc Brake Note: Ensure that the sensor wiring is routed to avoid chafing from moving parts (including rotors and steering components.
PAGE 52
TCV_DA_CMN ESP/ATC IND. ESP/ATC DASH INDICATOR ATC OFF-ROAD SWITCH (ORS) 20 TRAC CONTROL VALVE (TCV) 4 10 J1587 A J1587 B 2 2 J1939_HI 12 BATTERY 16 30A GROUND 12 (OPTIONAL) RETARDER RELAY 1 11 IND. INTERLOCK ABS IND. 9 SLS INPUT +12V BATTERY TRAILER ABS DASH INDICATOR 17 18 15 12 ABS IND.
PAGE 53
9 18 4 TCV_DA_CMN TRAC CONTROL VALVE (TCV) 5 TPMS GND 16 TCV_DA 6 10 CAN LO 2 CAN HI 2 12 30A ATC IND 17 GROUND 1 5A 16 17 2 TPMS COMM IND.
PAGE 54
GLOSSARY ABS — Antilock Brake System. ABS Event — Impending wheel lock situation that causes the ABS Controller to activate the modulator valve(s). ABS Indicator Lamp — An amber lamp which indicates the operating status of an antilock system. When the indicator lamp is on, ABS is disabled and the vehicle reverts to normal brake operation. IR — Independent Regulation. A control method in which a wheel is controlled at optimum slip, a point where retardation and stability are maximized.
PAGE 55
APPENDIX A: TROUBLESHOOTING A 12-7 BLINK CODE, EQUIVALENT TO A (SID-93 FMI-4) (SPN‑0802 FMI-04) DIAGNOSTIC TROUBLE CODE (DTC) Bendix® EC‑80™ ESP® Electronic Control Unit (ECU) 1) Remove the X1, X2, X3 and X4 connectors from the ECU. 2) Using X1-1 as the ground connection, check for resistance for the entire X2 connector. There should be no resistance to ground found. Please fill out worksheet on this page.
PAGE 56
® APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX BLINK CODE EQUIVALENTS SPN (J1939) 56 FMI (J1939) Bendix® Blink Code Equivalent(s) Diagnostic Trouble Code (DTC) Description (1st (2nd Digit) Digit) Lamp Status ABS ATC/ ESP - - - 1 1 No DTCs 168 168 3 4 6 6 2 1 Power Supply DTCs Battery Voltage Too High Battery Voltage Too Low Miscellaneous DTCs ON ON ON ON 564 3 25 3 Differential Lock Solenoid Shorted To Voltage ON ON 564 564 564 4 5 13 25 25 25 2 1 7 ON ON ON - 575 1
PAGE 57
® APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX BLINK CODE EQUIVALENTS SPN (J1939) Bendix® Blink Code Equivalent(s) FMI Diagnostic Trouble Code (DTC) Description (J1939) (1st (2nd Digit) Digit) 629 630 630 630 630 630 630 630 630 630 630 630 630 630 630 630 14 12 12 12 12 12 13 13 13 13 13 13 13 13 13 14 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 1 6 10 19 20 28 2 8 9 18 21 22 25 26 29 13 639 639 639 639 639 639 639 639 639 639 639 639 639 639 639 639 639 639 639 639 639 2 2 2 2 2 2 2 2
PAGE 58
® APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX BLINK CODE EQUIVALENTS Bendix® Blink Code Equivalent(s) Diagnostic Trouble Code (DTC) Description (1st (2nd Digit) Digit) SPN (J1939) FMI (J1939) 639 2 26 13 639 2 26 14 639 2 26 15 639 2 26 16 639 2 26 17 639 2 26 18 639 639 639 639 639 639 639 639 2 2 2 2 2 2 2 2 26 26 26 26 26 26 26 26 19 20 21 22 23 24 25 26 639 2 26 27 639 639 639 2 5 12 26 11 11 28 29 1 789 1 2 1 58 Invalid Data Transfer Time‑out of EC1
PAGE 59
® APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX BLINK CODE EQUIVALENTS ® SPN (J1939) FMI (J1939) 793 793 793 793 793 793 794 794 794 794 794 794 794 2 7 8 9 10 13 1 2 7 8 9 10 13 Bendix Blink Code Equivalent(s) Diagnostic Trouble Code (DTC) Description (1st (2nd Digit) Digit) 14 14 14 14 14 14 15 15 15 15 15 15 15 3 5 6 2 4 7 1 3 5 6 2 4 14 Additional Axle Left WSS Open or Shorted Additional Axle Left WSS Wheel End Additional Axle Left Erratic Sensor Signal Additional Axle Left WSS Signal Low
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® APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX BLINK CODE EQUIVALENTS ® Bendix Blink Code Equivalent(s) Diagnostic Trouble Code (DTC) Description (1st (2nd Digit) Digit) SPN (J1939) FMI (J1939) 932 932 932 933 933 933 934 934 934 935 935 935 936 936 936 936 937 937 937 937 938 938 938 939 939 939 940 940 940 941 941 941 942 942 942 942 943 943 943 943 3 4 5 3 4 5 3 4 5 3 4 5 3 4 5 13 3 4 5 13 3 4 5 3 4 5 3 4 5 3 4 5 3 4 5 13 3 4 5 13 7 7 7 8 8 8 9 9 9 10 10 10 16 16 16 16 17 17 17 17 7 7 7 8
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® APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX BLINK CODE EQUIVALENTS Bendix® Blink Code Equivalent(s) Diagnostic Trouble Code (DTC) Description (1st (2nd Digit) Digit) SPN (J1939) FMI (J1939) 1056 1056 1056 3 3 4 20 20 20 2 5 1 Pressure Modulator Valve (PMV) DTCs Trailer PMV: Release Solenoid Shorted to Voltage Trailer PMV: hold Solenoid Shorted to Voltage Trailer PMV: Release Solenoid Shorted to Ground 1056 4 20 4 1056 5 20 3 1056 5 20 1056 5 20 1056 13 1059 1067 1067 1067
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® APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX BLINK CODE EQUIVALENTS Bendix® Blink Code Equivalent(s) Diagnostic Trouble Code (DTC) Description (1st (2nd Digit) Digit) SPN (J1939) FMI (J1939) 1809 1809 1809 1809 1809 1809 1809 2 2 2 2 2 13 13 23 23 23 23 23 22 23 1 3 4 5 6 15 2 2011 2051 31 31 11 11 26 27 2622 2622 2622 2622 2622 2 3 3 4 5 12 12 12 12 12 24 26 31 25 33 2984 2984 3 4 12 12 34 35 Lateral Acceleration Sensor DTCs LAS Signal of Range LAS Static Calibration Error LAS
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Full Table of Contents Introduction.............................................................................................................................................. 1 Yaw Control (YC)..................................................................................................................................... 3 Roll Stability Program (RSP)................................................................................................................... 3 Components........................
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