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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 >> OnStar Microphone Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify that DTC B2455 is not set.
    • If DTC B2455 is not set 
  3. Verify that a successful OnStar voice command can be made.
    • If your voice can not be heard clearly. 

      Refer to Circuit/System Testing - Microphone Malfunction.

    • If your voice can be heard clearly 
  4. All OK.
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