Test C: The Door Locks Operate Only One Way

PINPOINT TEST C: THE DOOR LOCKS OPERATE ONLY ONE WAY

C1-C4:

C4-C6:

C6-C7:

C7-C8:

Normal Operation
The smart junction box (SJB) sends voltage signals to the door lock control switches through circuits CPL27 (WH/BN) and CPL30 (BU/BN) for the lock and unlock requests, respectively. When the lock or unlock switch is pressed, the voltage signal is routed to ground.

The SJB contains internal relays that are energized depending on input received. When the SJB receives a lock or unlock request from the door lock control switch, the SJB energizes the appropriate relay(s) to lock or unlock the doors.

DTC B2A25 - is an on-demand DTC that sets when the SJB detects a short to ground from the lock or unlock request input circuits.

Possible Causes
- Circuit CPL27 (WH/BN) open or short to ground
- Circuit CPL30 (BU/BN) open or short to ground
- SJB