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Home › Chevrolet › 2015 › Volt › Repair and Diagnosis › Accessories & Equipment › Infotainment › Cellular System, Entertainment System And Navigation System › Diagnostic Information and Procedures › DTC B1020: Auxiliary Electronic Control Unit › Circuit/System Verification

Circuit/System Verification

  1. Vehicle in Service Mode.
  2. Verify DTC B1020 is not set.
    • If DTC B1020 is set 

      Replace the A20 Radio/HVAC Controls.

    • If DTC B1020 is not set 
  3. All OK.
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