Diagnostic Instructions
Circuit/System Description
This feature prevents the locking of the driver door if the ignition key is left in the ignition lock cylinder. If a lock function occurs from any door lock switch and the body control module (BCM) senses an active state on either the left front door latch
signal, secondary door latch switch signal and/or the liftgate ajar switch signal circuits and the key in ignition switch signal circuit is in the YES state, the BCM, driver door module and passenger door module will lock the doors and then the driver door module
will unlock the driver door.
Reference Information
Schematic Reference
Door Lock/Indicator Schematics
Connector End View Reference
Description and Operation
Power Door Locks Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
With the ignition OFF, the key in the ignition and the driver window down, exit the vehicle, lock and close all doors. The driver door should unlock.
Circuit/System Testing
- Command the doors to LOCK and UNLOCK by pressing the door lock switch.
- Ignition OFF, with a scan tool, observe the Key in Ignition Status, the parameter should be Key In.
- With a scan tool, observe each of the Door Ajar Switch parameters while opening and closing each door, the reading should change between Door Closed and Ajar.
- If all circuits are normal, replace the BCM.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup and programming