Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

When the door lock switch is placed in to the UNLOCK position, ground is applied through the switch to the body control module (BCM). The BCM then applies a ground through the door unlock relay control circuit to the coil side of the unlock relay in the underhood electrical centre. The relay then engages and applies voltage to all the door lock assemblies.

The ignition is ON.

The BCM receives a ground signal on the door unlock relay control circuit

The BCM ceases attempt to unlock the doors.

The BCM clears this code from current when the fault is removed from the system.

Schematic Reference

Door Lock/Indicator Schematics .

Connector End View Reference

Vehicle Access Component Views

Electrical Information Reference

Scan Tool Reference

Control Module References

Ignition ON, place the driver door lock switch to the UNLOCK position. The driver door should unlock.

1. Disconnect the unlock relay in the underhood electrical centre. Verify the DTC resets.

⇒	If the DTC does not reset, replace the relay.

2. Disconnect the underhood fuse centre electrical connector. Verify the DTC resets.

⇒	If the DTC does not reset, replace the underhood fuse centre.

3. Test for a short to ground/voltage or open/high resistance in the door unlock relay control circuit.

⇒	If the circuit tests normal, replace the BCM.

Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.