Driver Door Unlatch Inoperative

*DRIVER DOOR UNLATCH INOPERATIVE





For a complete wiring diagram Consult Diagrams/Electrical





Diagnostic Test

1. DTC PRESENT
With the scan tool, read DTC's.
Does the scan tool display any Door Lock related trouble codes?

Yes

- Diagnose and repair the DTC(s).

No

- Go To 2

2. LATCH MOTOR




Disconnect the Latch Motor connector.
Connect a 12-volt test light between the (P127) Driver Door Unlatch Driver circuit and the (P129) Driver Door Unlatch Return circuit.
With the scan tool, actuate the UNLATCH DRIVER DOOR and then actuate RETURN LATCH.
Did the test light illuminate brightly when the door was actuated?

Yes

- Replace the Latch Motor.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 3

3. (P127) DRIVER DOOR UNLATCH DRIVER CIRCUIT OPEN




Turn the ignition off.
Disconnect the Body Control Module C4 connector.
Measure the resistance of the (P127) Driver Door Unlatch Driver circuit between the BCM C4 connector and the Latch Motor connector.
Is the resistance below 2.0 ohms?

Yes

- Go To 4

No

- Repair the (P127) Driver Door Unlatch Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

4. (P129) DRIVER DOOR UNLATCH RETURN CIRCUIT OPEN
Measure the resistance of the (P129) Driver Door Unlatch Return circuit between the BCM C4 connector and the Latch Motor connector.
Is the resistance below 2.0 ohms?

Yes

- Replace the Body Control Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the (P129) Driver Door Unlatch Return circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test