Diagnostic Routine D

Diagnostic Routine D

Diagnostic Overview

All Door Locks Are Inoperative From One Switch

Refer to Wiring Diagram Set 117 for schematic and connector information Electrical Diagrams.

Normal Operations and Fault Conditions

The BCM (Body Control Module) sends voltage signals to the door lock control switches through the lock and unlock input circuits. When the lock or unlock switch is pressed, the corresponding voltage signal is routed to ground, signaling the BCM (Body Control Module) to lock or unlock the doors. The door lock control switches have a dedicated ground circuit.

Visual Inspection and Diagnostic Pre-checks

- Door lock control switches

Pinpoint Test

1. CHECK THE SUSPECT DOOR LOCK CONTROL SWITCH

1. Disconnect Suspect Door Lock Control Switch.

2. Carry out the door lock control switch component test.

Does the door lock control switch pass the component test?