Door Lock Indicator Malfunction

Door Lock Indicator Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)provides an overview of each diagnostic category



Diagnostic Fault Information






Circuit/System Description

The driver door module (DDM) and front passenger door module (PDM) control the door lock status indicators for there respective doors. The DDM and PDM provide voltage to the indicators to illuminate when the lock system is in a virtual state of lock. The indicators only illuminate for approximately 5 seconds after lock switch activation or a door handle has been operated and the door control modules are in a virtual state of lock. When the door is open, the door lock status indicators cycle ON/OFF. The remote control door lock receiver (RCDLR) receives RFA transmissions and communicates with the door control modules for lock and unlock commands. The door lock status indicators are grounded at G201 for the driver door indicator and G202 for the passenger door indicator.


Reference Information
Schematic Reference

Door Lock/Indicator Schematics (Door Lock/Indicator Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Power Door Locks Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning)


Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the inoperative door lock indicator.
2. Ignition OFF, verify that a test lamp illuminates between B+ and the ground circuit terminal B.

• If the test lamp does not illuminate, test the ground circuit for an open/high resistance.

3. Connect a test lamp between the voltage supply circuit terminal A and ground.
4. Command the lock switch indicator ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.

• If the test lamp is always ON, test the voltage supply circuit for a short to voltage. If the circuit tests normal, replace the appropriate door control module.


• If the test lamp is always OFF, test the voltage supply circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the appropriate door control module.

5. If all circuits tests normal, replace the inoperative door lock indicator.



Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Door Lock Status Indicator Replacement (Door Lock Status Indicator Replacement)
* Control Module References (Programming and Relearning)for DDM or PDM replacement, setup and programming