OnStar Call Center Remote Function Requests Inoperative

OnStar Call Center Remote Function Requests Inoperative

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 communication interface module (CIM) has the capability of commanding the horn, initiating door lock/unlock, or operating the exterior lamps using the serial data circuits. These functions are commanded by the OnStar(R) Call Center per a customer request.

Diagnostic Aids

The customer concern may have been due to a lack of cellular service in a given area. A failure in the National Cellular Network infrastructure that has since been corrected.

Reference Information
Schematic Reference

OnStar Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

OnStar Description and Operation (OnStar 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/System Verification

Important:
* It is necessary to inform the OnStar(R) Call Center advisor that this call is for vehicle diagnostic purposes.

* It is necessary to have the vehicle in an open outside area where a cellular call can be successfully placed and GPS data can be received from satellites.


1. Verify that the horn, lights, and the doors locks on the vehicle operate properly.

• If the applicable system does not operate properly, refer to Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) .

2. Contact the OnStar(R) Call Center by pressing the blue OnStar(R) button. Verify with the OnStar(R) advisor that all of the remote functions (door locks, lights, or horn) work.

• If unable to connect with the OnStar(R) call center, refer to Unable to Contact OnStar Call Center (Unable to Contact OnStar Call Center) .
• If the remote functions do not operate when requested, replace the CIM.

Repair Instructions

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

Control Module References (Programming and Relearning) for CIM replacement, setup, and programming