One Passenger Door Lock Inoperative

ONE PASSENGER DOOR LOCK INOPERATIVE

One Passenger Door Lock Inoperative:

POSSIBLE CAUSES
- (P392) or (P393) door lock driver circuit open
- (P392) or (P393) door lock driver circuit short to ground
- (P303) Passenger door unlock driver circuit open
- (P303) Passenger door unlock driver circuit short to ground
- Door latch

DIAGNOSTIC TEST

1. PASSENGER DOOR LATCH INOPERATIVE

NOTE: Graphics show Right Front Latch but the other 2 passenger latches are similar.




Turn the ignition off.
Disconnect the inoperative Passenger Door latch connector.
Connect a test light between the (P392/3) Door Lock Driver circuit and the (P303) Passenger Door Unlock Driver circuit.
Close the front doors or trip the door latches to the closed position.
Operate the door locks in both positions and observe the test light.

Q: Does the test light illuminate brightly for approximately 300 ms. when the door locks are actuated?

YES: Replace the Passenger Door Latch. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 2

2. CHECK (P303) PASSENGER DOOR UNLOCK DRIVER CIRCUIT FOR AN OPEN




Disconnect the Cluster C1 connector.
Measure the resistance of the (P303) Passenger Door Unlock Driver circuit between the Latch connector and the Cluster C1 connector.

Q: Is the resistance below 2.0 ohms?

NO: Repair the (P303) Passenger Door Unlock Driver circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
YES: Go To 3

3. CHECK (P303) PASSENGER DOOR UNLOCK DRIVER CIRCUIT FOR A SHORT TO GROUND




Measure the resistance between Ground and the (P303) Passenger Door Unlock Driver circuit.

Q: Is the resistance below 1000.0 ohms?

YES: Repair the (P303) Passenger Door Unlock Driver circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 4

4. CHECK (P392/3) DOOR LOCK DRIVER CIRCUIT FOR AN OPEN




Measure the resistance of the (P392/3) Door Lock Driver circuit between the Cluster C1 connector and the Passenger Door Latch connector.

Q: Is the resistance below 2.0 ohms?

YES: Repair the (P392/3) Door Lock Driver circuit for a short to ground.
NO: Repair the (P392/3) Door Lock Driver circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test