Test F: The Door Locks Operate Only One Way

PINPOINT TEST F: THE DOOR LOCKS OPERATE ONLY ONE WAY

F1-F3:

F3-F4:

F4-F6:

Normal Operation
The door lock control switches provide a ground, circuit 57 (BK) for the vehicle security module (VSM) lock and unlock signal circuits 119 (PK/YE) and 120 (PK/LG). The door lock actuator output circuits 117 (PK/BK), 118 (PK/OG) and 163 (RD/OG) are at ground on circuit 57 (BK) through the VSM when the lock and unlock relays are not energized.

When the VSM receives a lock request through circuit 119 (PK/YE), the VSM processes the lock request and energizes the all lock relay, supplying voltage to circuit 117 (PK/BK) to lock the doors. Circuits 118 (PK/OG) and 163 (RD/OG) are at ground on circuit 57 (BK) through the VSM.

When the VSM receives an unlock request through circuit 120 (PK/LG), the VSM processes the unlock request and energizes the all unlock relay and driver unlock relay supplying voltage to circuits 118 (PK/OG) and 163 (RD/OG) to unlock the doors. Circuit 117 (PK/BK) is at ground on circuit 57 (BK) through the VSM.

DTC B2574 - is a continuous and on-demand DTC that sets if the VSM detects a short to ground on the door lock control switch circuit 119 (PK/YE).

DTC B2575 - is a continuous and on-demand DTC that sets if the VSM detects a short to ground on the door unlock switch circuit 120 (PK/LG).

Possible Causes
- Circuit 119 (PK/YE) open or short to ground
- Circuit 120 (PK/LG) open or short to ground
- Door lock control switches
- VSM