Test C: The Door Locks Operate Only One Way
PINPOINT TEST C: THE DOOR LOCKS OPERATE ONLY ONE WAYNormal Operation
The SJB sends voltage signals to the door lock control switches through circuits CPK19 (BU/GN) and CPK23 (YE/VT) 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.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- SJB
C1:
C2-C4:
C4-C5:
