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. The BCM (Body Control Module) sends the lock or unlock request from the door lock control switch to the RFA (Remote Function Actuator) module over the MS-CAN (Medium Speed Controller Area Network).

Visual Inspection and Diagnostic Pre-checks

- Door lock control switches

Pinpoint Test

1. CARRY OUT A NETWORK TEST

1. Using a scan tool, perform the network test.

Does the RFA (Remote Function Actuator) module and BCM (Body Control Module) pass the network test?








2. CHECK THE SUSPECT DOOR LOCK CONTROL SWITCH FOR CORRECT OPERATION

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?