Test B: All Door Locks Are Inoperative

PINPOINT TEST B: ALL DOOR LOCKS ARE INOPERATIVE

B1:

B1-B3:

B3-B5:

B5-B6:

Normal Operation
The door lock control switches provide a ground, circuit GD133 (BK) or circuit GD151 (BK/GN) for the smart junction box (SJB) lock and unlock signal circuits CPL42 (GY/YE) and CPL43 (VT/GY). The door lock actuator circuits CPL11 (GY/BN), CPL51 (BU/GN) and CPL52 (VT/GY) are at ground potential in the SJB when the lock and unlock relays are not energized.

When the SJB receives a lock request through circuit CPL42 (GY/YE), the SJB processes the lock request and energizes the all lock relay, supplying voltage to circuit CPL11 (GY/BN) to lock the doors. Circuits CPL51 (BU/GN) and CPL52 (VT/GY) are at ground potential within the SJB.

When the SJB receives an unlock request through circuit CPL43 (VT/GY), the SJB processes the unlock request and energizes the all unlock relay and driver unlock relay supplying voltage to circuits CPL52 (VT/GY) and CPL51 (BU/GN) to unlock the doors. Circuit CPL11 (GY/BN) is at ground potential within the SJB.

Possible Causes
- Fuse
- Circuit CPL11 (GY/BN) open or short to ground
- Circuit CPL51 (BU/GN) short to ground
- Circuit CPL52 (VT/GY) short to ground
- Circuit CPL59 (BN/BU) short to ground
- Door lock actuator
- SJB