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Possible Causes (P237) SECONDARY UNLOCK DRIVER WIRE OPEN (P235) SECONDARY LOCK DRIVER WIRE OPEN DOOR LATCH OR LIFTGATE MOTOR Theory of Operation The secondary lock is a dead bolt that prevents the door from being opened when the vehicle has been armed. It Diagnostic Test 1. TEST FOR DIAGNOSTIC TROUBLE CODES Turn the ignition on. With the scan tool, record and erase DTC’s Operate the Driver Door Lock Switch in all positions several times. Cycle the ignition from on to off and wait for five seconds. Turn the ignition on. With the scan tool, read the active DTC’s. Does the scan tool display any Power Door Lock related DTC’s? No >> Go To 2 Yes >> Refer to the Table of Contents in this section to diagnose and repair the DTC’s. 2. DOOR LOCK MOTOR CIRCUIT Lower the driver window. Turn the ignition off. Disconnect the inoperative Door Latch (Motor) connector. Connect a 12 volt test light between the (P235) Secondary Lock Driver NOTE: Graphic shows the Passenger Front Latch – all others sim- Using the RKE fob, operate the door lock. Wait 30 seconds and then Does the test light illuminate brightly when the locks are actu- Yes >> Replace the Door latch Assembly (or motor). Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - No >> Go To 3 PM POWER LOCKS - ELECTRICAL DIAGNOSTICS 8N - 41 |