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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 >> DTC B13ED >> Circuit/System Verification

Circuit/System Verification

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  1. Vehicle in service mode, A11 Radio on.
  2. Verify station reception is normal when tuned to several known good FM or DAB stations.
    • If FM or DAB reception is poor. 

      Refer to Circuit/System Testing

    • Go to next step: If reception is normal 
  3. All OK.
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