A Symptoms - OnStar

ONSTAR SYMPTOM DIAGNOSIS

SYSTEM DESCRIPTION
This symptom table will enable the user to verify the customer complaint and narrow it to its source. If there is a concern with voice recognition or OnStar(R) steering wheel control function, technicians should proceed directly to the applicable diagnostic in Symptoms - Cellular Communication.

IMPORTANT: To successfully diagnose and repair the OnStar(R) system it is necessary to comprehend its operation. Technicians should read and understand the OnStar Description and Operation before attempting to repair an OnStar(R) system.

DIAGNOSTIC AIDS
- The customer concern may have been due to a lack of cellular service in a given area or a failure in the National Cellular Network infrastructure that has since been corrected.
- If the prompt OnStar request ended is heard without pressing the white dot button at the end of an OnStar(R) keypress, the OnStar(R) system at one time has made a successful cellular connection, but was unable to complete the call. If repeated calls are placed with this result, contact the General Motors Technical Assistance Center.
- Inaccurate or aged global positioning system (GPS) position may have been due to the temporary loss of GPS signal reception by the vehicle in instances such as driving through tunnels or parking structures which restrict the navigation antenna from a clear view of the satellites in the sky.

TEST

Steps 1-11:

Steps 12-17: