Power Door Locks Inoperative

Power Door Locks Inoperative

Test Description

Step 1 - Step 7:

Step 8 - Step 20:

Step 21 - Step 24:

The numbers below refer to the step numbers on the diagnostic table.
3. This step determines if there is a lock actuator control circuit of one of the rear doors shorted to ground. This condition could open the RRDR MDL fuse located in the rear fuse block and simultaneously set DTCs U1162 and U1163 when the rear door lock actuator is actuated.
4. This step checks to see that the door module associated with the inoperative door lock recognizes the switch inputs. Turning ON the headlamps switch in this step eliminates the possibility of the inoperative door lock switch finding an alternative path to ground through the switch illumination circuit, which could result in the scan tool displaying incorrect lock switch states.
5. This step determines if the lock switch or lock switch circuits are the cause of the malfunction.

If the 3-amp jumper wire fuse opens when the jumper wire is connected, test the appropriate switch signal circuits for a short to battery positive voltage.

7. This step determines if the unlock circuit may be the cause of the malfunction. If the test lamp is already illuminated before operating the lock to Unlock, test the door lock actuator Unlock circuit for a short to battery positive voltage.
8. This step determines if the lock circuit may be the cause of the malfunction. If the test lamp is already illuminated before operating the lock to Lock, test the door lock actuator Lock circuit for a short to battery positive voltage.
16. This step directs you to inspect for poor connections at either, the front passenger door module, or, at the driver door switch assembly as a pre-requisite to replacing the front passenger door module or driver door switch assembly. This is because lock switch signals for the driver door are detected and processed by the driver door switch assembly, while lock switch signals for the front passenger door are detected and processed by the front passenger door module.
21. This step directs you to replace either, the front passenger door module or driver door switch assembly. This is because lock switch signals for the driver door are detected and processed by the driver door switch assembly (DDSA), while lock switch signals for the front passenger door are detected and processed by the front passenger door module.