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Home >> Cadillac >> 2006 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 820 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Unable to Contact OnStar Call Center >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
  • It is important 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.
  • Placing an emergency call to the OnStar® Call Center should only be made if the diagnosis of the system leads to step 3. Immediately after an OnStar® advisor picks up the call, they should be told that this call is for diagnostic purposes only and there is no emergency.
  1. Press the OnStar® Call Center button. Verify a connection is not made with the OnStar® Call Center.
    • If a connection is made with the OnStar® Call Center, go to Diagnostic Aids.
  2. Listen for other tones or cellular messages rather than the normal progression tones or the Unable to Contact OnStar® prompt.
    • If no other tones or cellular messages are heard other than the normal progression tones or the Unable to Contact OnStar® prompt, go to Component Testing.
  3. Record all messages heard from the OnStar® Call Center button press.
  4. Press the OnStar® emergency button. Verify a connection to the OnStar® Call Center is made within 10 minutes.
    • If a connection is not made within specified time, go to Component Testing.
  5. Hear all messages during the course of the tests available, use the scan tool to access the STID, ESN and Transceiver I.D. and contact the General Motors Technical Assistance Center.
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