Driver Door Fails To Lock And Unlock

*DRIVER DOOR FAILS TO LOCK AND UNLOCK





For a complete wiring diagram refer to Diagrams/Electrical.





Diagnostic Test

1. CHECK DOOR LOCK MOTOR





Turn the ignition off.

Remove the inner door trim panel to gain access to the Door Lock Motor connector.

Disconnect the Driver Door Lock Motor connector.

Remove the key from the ignition switch.

Connect a test light between the Door Lock Relay Output and the Driver Door Unlock Relay Output circuits in the door lock motor connector.

Turn the ignition on.

Press the door lock switch to the Lock and Unlock positions.

Did the test light illuminate brightly when the lock switch was pressed in both directions?

Yes

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

No

- Go To 2

2. CHECK (P34) DRIVER DOOR UNLOCK RELAY OUTPUT WIRE FOR AN OPEN





Using a 12-volt test light connected to ground, check the (P34) Driver Door Unlock Relay Output circuit in the door latch connector.

Close the driver door or trip the latch to the door closed position

With the scan tool actuate the DRIVER DOOR UNLOCK RELAY.

Does the test light illuminate brightly when the relay is actuated?

Yes

- Go To 3

No

- Repair the (P34) Driver Door Unlock Relay Output wire for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. CHECK (P33) DOOR LOCK RELAY OUTPUT WIRE FOR AN OPEN





Using a 12-volt test light connected to ground, check the (P33) Door Lock Relay Output circuit.

With the scan tool actuate the Door Lock Relay.

Does the test light illuminate brightly when the relay is actuated?

Yes

- Go To 4

No

- Repair the (P33) Door Lock Relay Output wire for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

4. CHECK DRIVER DOOR UNLOCK RELAY GROUND





Remove the Driver Door Unlock Relay.

Using a 12-volt test light connected to 12-volts, check the Driver Door Unlock Relay Ground circuit (cavity 87a) in the relay connector.

Does the test light illuminate brightly?

Yes

- Replace the Driver Door Unlock Relay.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the Driver Door Unlock Relay Ground circuit for an open or replace the Junction Block.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test