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Home >> GMC >> 2017 >> Acadia SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 189 (Cellular System, Entertainment System, And Navigation System - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> OnStar Button Malfunction (UE1) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

Contact the OnStar® Call Center first before pressing the emergency button in order to notify them of the test.

  1. Ignition ON/vehicle in Service Mode.
  2. Verify no DTCs are set.
    • If no DTCs are set 
  3. Verify that each button of the S51 Telematics Button Assembly operates normally by pressing each button individually.
    • If none of the buttons operate normally 

      Refer to Circuit/System Testing.

    • If some, but not all, of the buttons operate normally 

      Test or replace the S51 Telematics Button Assembly.

    • If all of the buttons operate normally 
  4. All OK.
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