Test C: The Door Locks Operate Only One Way
PINPOINT TEST C: THE DOOR LOCKS OPERATE ONLY ONE WAYNormal Operation
The door lock control switches provide voltage to the driver door module (DDM) through circuits 119 (PK/YE) and 120 (PK/LG) for the lock and unlock requests, respectively. When the lock or unlock switch is pressed, the voltage signal is routed to the DDM.
The DDM contains internal relays that are energized depending on input received. When the DDM receives a lock or unlock request from the door lock control switch, the DDM energizes the appropriate relay(s) to lock or unlock the doors.
- DTC B1396 (Power Door Lock Circuit Short To Battery) - is a continuous and on-demand DTC that sets when the DDM detects a short to voltage on the lock input circuit 119 (PK/YE). This DTC may also set if the lock switch is pressed for longer than 2 minutes.
- DTC B1397 (Power Door Unlock Circuit Short To Battery) - is a continuous and on-demand DTC that sets when the DDM detects a short to voltage on the unlock input circuit 120 (PK/LG). This DTC may also set if the unlock switch is pressed for longer than 2 minutes.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door lock control switch
- DDM
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