Pinpoint Test 3: The Door Locks Operate Only One Way

PINPOINT TEST 3: THE DOOR LOCKS OPERATE ONLY ONE WAY

Normal Operation
The smart junction box (SJB) sends voltage signals to the door lock control switches through circuits (L/G) and (Y/V) 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 (Trim Panel Lock Switch Circuit Failure) - is an on-demand DTC that sets when the SJB detects a short to ground from the lock or unlock request input circuits. This DTC may also set if either of the door lock control switches are pressed for longer than 2 minutes.

Possible Causes
- Wiring, terminals or connectors
- Door lock control switch
- SJB

Diagnostic Procedure

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Step 1-Step 2:

Step 3-Step 5:

Step 6-Step 7:

Step 8: