Workshop Manual

TRANSMISSION CONTROL SYSTEM (4L30–E)
7A1–77
DTC P1850 Brake Band Apply Solenoid Malfunction
Step Action Yes No
1 Were you sent here from the “Powertrain On–Board Diagnostic
(OBD) System Check”?
Go to Step 2
Go to OBD
System Check
Refer to
Driveability and
Emission in
Engine section
2 1. Install the scan tool.
2. With the engine “on”, turn the ignition switch “on”.
NOTE: Before clearing DTC(s), use the scan tool to record “Freeze
Frame” and “Failure Records” for reference, as data will be lost
when the “Clear Info” function is used.
3. Record the DTC “Freeze Frame” and “Failure Records”.
Were DTCs P0753, P0758 set?
Go to Step 3 Go to Step 4
3 Using the J39200 DVOM, back probe between PCM connector
terminals E35–43 and E35–1.
Is the voltage between 10 to 12 volts?
Go to Step 5 Go to Step 6
4 1. Turn the ignition “off”.
2. Disconnect the E-34 (BLUE) and E-35 (RED) PCM connector.
3. Using the J39200 DVOM, measure the resistance between
PCM connector terminals E35–43 and E35–10.
Is the resistance within 10–12 ohms?
Go to Step 10 Go to Step 11
5 Using the J39200 DVOM, back probe between PCM connector
terminals E35–10 and E35–1.
Is the voltage between 10 to 12 volts?
Go to Step 19 Go to Step 4
6 1. Turn the ignition “off”.
2. Disconnect the E-34 (BLUE) and E-35 (RED) PCM connector.
3. Using the J39200 DVOM, check continuity between PCM
terminal E35–43 and ground.
Is there a continuity?
Go to Step 7 Go to Step 8
7 1. Disconnect the transmission main case connector E-42.
2. Using the J39200 DVOM, check continuity between the
terminal E42–7(B) and ground.
Is there continuity?
Go to Step 13 Go to Step 14
8 1. Disconnect the E-34 (BLUE) and E-35 (RED) PCM Connector.
2. Using the J39200 DVOM, measure the resistance between
the PCM connector terminals E35–43 and E35–10.
Is the resistance within 10–12 ohms?
Go to Step 19 Go to Step 9
9 1. Disconnect the transmission main case connector E-42.
2. Using the J39200 DVOM, measure the resistance between
the terminals E42–7(B) and E42–2(D).
Is the resistance within 10–12 ohms?
Go to Step 15 Go to Step 16
10 Using the J39200 DVOM, check continuity between PCM
terminal E35–10 and ground.
Is there continuity?
Go to Step 12 Go to Step 19
11 1. Disconnect the transmission main case connector E-42.
2. Using the J39200 DVOM, measure the resistance between
the terminals E42-7(B) and E42-2(D).
Is the resistance within 10–12 ohms?
Go to Step 18 Go to Step 16