Driver Door Fails To Unlock

Possible Causes:

• DTC's Present
• Driver Door Unlock Relay
• Driver Door Unlock Relay Output Wire Short To Ground

Testing

1. With the DRBIII(R), read DTC's. Are there any Power Door Lock related codes present? If yes, see POWER DOOR LOCKS/RKE  for related problems. Perform BODY VERIFICATION TEST  . If no, go to next step.
2. Install a substitute Relay in place of the Driver Door Unlock Relay. Remove the key from the ignition switch. Press the door lock switch to the Lock and Unlock positions. Did the Driver Door Lock and Unlock? If yes, replace the Driver Door Unlock Relay. See POWER DOOR LOCKS & REMOTE KEYLESS ENTRY SYSTEMS - LIBERTY article for REMOVAL & INSTALLATION. Perform BODY VERIFICATION TEST  . If no, go to next step.
3. Remove the Driver Door Unlock relay from the Junction Block. Remove the Driver Door trim panel and gain access to the door lock motor connector. See FRONT DOOR TRIM PANEL under REMOVAL & INSTALLATION in POWER DOOR LOCKS - LIBERTY article. Disconnect the Driver Door Lock Motor connector. Measure the resistance between ground and the Driver Door Unlock Relay Output circuit (cavity 30) in the relay connector. Is the resistance below 1000.0 ohms? If yes, repair the Driver Door Unlock Relay Output wire for a short to ground. Perform BODY VERIFICATION TEST  . If no, test complete.