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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 190 (Cellular, Entertainment, And Navigation System) >> Diagnostic Information and Procedures >> DTC B13AB >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2021 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the coax cable connector at the T4TA Auxiliary Wireless Communication Interface Antenna and at the A11 Radio.
  2. Verify the coax cable passes the coax cable component test. Refer to Component Testing.
    • If the coax cable does not pass the test 

      Replace the coax cable

    • Go to next step: If the coax cable passes the test 
  3. Test or replace the T4TA Auxiliary Wireless Communication Interface Antenna.
  4. Verify DTC B13AB is not set.
    • If DTC B13AB is set 

      Replace the A11 Radio.

    • Go to next step: If DTC B13AB is not set 
  5. All OK.
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