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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Cellular, Entertainment, And Navigation - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Cellular Telephone Microphone Malfunction >> Circuit/System Verification

Circuit/System Verification

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  1. Place a hands free cellular test call.
  2. Clearly speak into the left front and (if equipped) right front mobile telephone microphone.
    • If there is trouble being heard from the left front microphone 

      Refer to Circuit/System Testing - B24LF Mobile Telephone Microphone - Left Front

    • If there is trouble being heard from the right front microphone 

      Refer to Circuit/System Testing - B24RF Mobile Telephone Microphone - Right Front

    • Go to next step: If no trouble being heard from either microphone 

      Go to next step: All OK.