Left Front Locks Only - All Others Inoperative

LEFT FRONT LOCKS ONLY - ALL OTHERS INOPERATIVE

Left Front Locks Only - All Others Inoperative:

POSSIBLE CAUSES
- (P1) door unlock driver left front circuit shorted to ground
- (P392) Door lock driver right doors circuit shorted to (G778) door unlock driver right doors
- (P5) Door unlock driver left rear shorted to (P393) door lock driver left doors
- Instrument cluster

NOTE: If any of the above circuits are shorted, the fuse may blow after one attempt to operate the locks.

Diagnostic Test

1. CHECK FOR ACTIVE DTC's
Turn the ignition on.
With the scan tool, read active DTC's.

Q: Does the scan tool display any door lock related DTC's?

NO: Go To 2
YES: Refer to symptom list for problems related to Power Door Locks. Diagnose and repair the DTC's

2. CHECK (P1) DOOR UNLOCK DRIVER LEFT FRONT FOR SHORT TO GROUND




Turn the ignition off.
Disconnect the Cluster C1 connector.
Measure the resistance between ground and the (P1) Door Unlock Driver Left Front circuit.

Q: Is the resistance below 1000.0 ohms?

NO: Go To 3
YES: Repair the (P1) Door Unlock Driver Left Front circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. CHECK THE (P5) DOOR UNLOCK DRIVER LEFT REAR FOR A SHORT TO THE (P393) DOOR LOCK DRIVER LEFT DOORS




Measure the resistance between the (P5) Door Unlock Driver Left Rear/ Liftgate and the (P393) Door Lock Driver Left Doors circuits.

Q: Is the resistance below 2.0 ohms?

NO: Go To 4
YES: Repair the (P5) Door Unlock Driver Left Rear circuit for a short to the (P393) Door Lock Driver Left Doors circuit.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

4. CHECK THE (P392) DOOR LOCK DRIVER RIGHT DOORS CIRCUIT FOR A SHORT TO THE (G778) DOOR UNLOCK DRIVER RIGHT DOORS CIRCUIT




Measure the resistance between the (P392) Door Lock Driver Right Doors circuit and the (G778) Door Unlock Driver Right Doors circuit.

Q: Is the resistance below 2.0 ohms?

NO: Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
YES: Repair the (P392) Door Lock Driver Right Doors circuit for a short to the (G778) Door Unlock Driver Right Doors circuit.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test