One Passenger Door Fails To Lock And Unlock

ONE PASSENGER DOOR FAILS TO LOCK AND UNLOCK





For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

This test does not cover a secondary latch problem on a right hand drive vehicle.






1. TEST FOR DIAGNOSTIC TROUBLE CODES
1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs
3. Operate the Driver Door Lock Switch in all positions several times.
4. Cycle the ignition from on to off and wait for five seconds.
5. Turn the ignition on.
6. With the scan tool, read the active DTCs.

Does the scan tool display any Power Door Lock related DTCs?

No

- Go To 2

Yes

- Perform the appropriate diagnostic procedure. A L L Diagnostic Trouble Codes ( DTC ).

2. CHECK DOOR LOCK MOTOR CIRCUIT




1. Turn the ignition off.
2. Disconnect the inoperative Door Latch (Motor) connector.
3. Connect a 12-volt test light between the (P33) Door Lock Driver and the (P240) Passenger Door Unlock Driver circuits in the latch connector.

NOTE: Graphic shows the Passenger Front Latch - all others similar.

4. Remove the key from the ignition switch.
5. Operate the door locks several times in the lock and unlock positions from the door lock switch and observe the test light.

Does the test light illuminate brightly when the locks are actuated in both directions?

Yes

- Replace the Door latch Assembly (or motor).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. (P240) PASSENGER DOOR UNLOCK DRIVER WIRE OPEN




1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (P240) Passenger Door Unlock Driver circuit.
3. With the scan tool, actuate the Passenger Door Unlock Relay.

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

Yes

- Go To 4

No

- Repair the (P240) Passenger Door Unlock Driver wire for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. (P33) DOOR LOCK DRIVER WIRE OPEN




1. Using a 12-volt test light connected to ground, check the (P33) Door Lock Driver circuit.
2. With the scan tool, actuate the Door Lock Relay.

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

Yes

- Test Complete.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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