Test B: A Single/More Than One Door Lock Is Inoperative

PINPOINT TEST B: A SINGLE/MORE THAN ONE DOOR LOCK IS INOPERATIVE

Normal Operation
The battery junction box (BJB) fuse 8 (20A) provides voltage for the power lock/unlock system. The voltage is supplied to the driver door module (DDM) through circuit 1213 (WH/LB). Ground for the power lock/unlock system is provided to the DDM through circuit 57 (BK). The DDM contains internal relays that are energized depending upon the input received. When the DDM receives a lock request the DDM provides voltage to the door lock actuators on circuit 117 (PK/BK). Ground for the LH front door lock actuator is provided by circuit 163 (RD/OG) and ground for the remaining door lock actuators is provided by circuit 118 (PK/OG). When the DDM receives an unlock request, voltage and ground are reversed on the previously listed circuits.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door lock actuator
- DDM

B1-B2:

B2-B4:

B4-B5: