OnStar Call Center Remote Function Requests Inoperative

OnStar Call Center Remote Function Requests Inoperative

Diagnostic Instructions

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

Circuit/System Description

The vehicle communication interface module (VCIM) has the capability of commanding the horn, initiating door lock/unlock and operating the exterior lamps using the serial data circuits.

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.

Circuit/System Verification

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

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

• If the applicable system does not operate properly, refer to Diagnostic Starting Point - Horns, Diagnostic Starting Point - Lighting, or Symptoms - Remote Functions respectively. Initial Inspection and Diagnostic Overview Symptoms - Remote Functions

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 the remote functions do not work, use the scan tool to access the STID and ESN and contact the General Motors Technical Assistance Center.