Door Locks Isolation Test
- Check if power door locks lock using door lock switches. If doors lock from one switch only, refer to FRONT DOOR LOCK SWITCH OUTPUT TEST . If the doors do not lock from either switch, refer to DOOR LOCK RELAY ASSEMBLY TEST . If at least one door locks from both door lock switches, go to next step.
- Use body systems cartridge and connect a Tech 1 scan tool to Data Link Connector (DLC). Turn ignition switch to RUN position. Set Tech 1 to read door lock switch requests. Push both door lock switches toward UNLOCK position.
- If Tech 1 does not recognize any unlock requests, see REMOTE DOOR LOCKING TEST . If Tech 1 recognizes unlock request from only one switch, check wiring and suspect switch. If Tech 1 recognizes all unlock requests, go to next step.
- Ensure all doors are unlocked. Attempt to lock all doors using Tech 1. If no doors lock, see DOOR LOCK RELAY ASSEMBLY TEST . If one door does not lock, check suspect door lock and wiring. If all doors lock, go to next step.
- Ensure all doors are locked. Attempt to unlock all doors using Tech 1. If all doors unlock or only driver's door unlocks, see LEFT FRONT DOOR ISOLATION RELAY TEST . If no doors unlock, refer to DOOR LOCK RELAY ASSEMBLY TEST . If one door does not unlock, check suspect door lock motor and wiring.