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Home >> Buick >> 2017 >> Envision Base >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System, And Navigation System >> Diagnostic Information and Procedures >> DTC B2476 or B2482: Cellular Phone Select Service Switch >> Circuit/System Verification
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Circuit/System Verification

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 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 
  3. All OK.
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