Service Column Lock Indicator Always On

Service Column Lock Indicator Always On

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.



Circuit/System Description

The instrument panel cluster (IPC) illuminates the Service Column Lock indicator by supplying ground to the lamp. The steering column lock control module (SLCM) sends a serial data messages to the IPC, in order to command the indicator ON or OFF.


Reference Information
Schematic Reference

Antilock Brake System Schematics ([1][2]Antilock Brakes / Traction Control Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

ABS 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)for Scan Tool Information


Circuit Verification

Ignition ON, observe the service column lock indicator to turn ON then OFF during the IPC bulb test.


Circuit/System Testing

1. Ignition On, with a scan tool command the Scan Tool IPC display test ON and OFF. The service column lock indicator should turn ON and OFF.

• If the service column lock warning indicator does not turn ON and OFF, replace the IPC.




Repair Instructions

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


Control Module References (Programming and Relearning)for SLCM or IPC replacement, setup, and programming