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Home >> GMC >> 2018 >> Terrain SL >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System, And Navigation System - Diagnostic Information And Procedures >> Diagnostic Information And Procedures >> DTC B125E: Digital Audio Broadcast (DAB) Circuit >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF/vehicle OFF, disconnect the digital radio antenna coax cable from the T2RR Antenna - Roof Rear and the A11 Radio.
  2. Verify the digital radio antenna coax cable passes the coax cable component test. Refer to Component Testing.
    • If the coax cable does not pass the test 

      Replace the antenna coax cable

    • Go to next step: If the coax cable passes the test 
  3. Replace the T2RR Antenna - Roof Rear.
  4. Ignition ON/vehicle in Service Mode, A11 Radio ON, tune to digital band.
  5. Verify DTC B125E is not set as current and digital reception is improved.
    • If DTC B125E is set as current or digital reception is not improved 

      Replace the A11 Radio.

    • Go to next step: If DTC B125E is not set as current and digital reception is improved 
  6. All OK.
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