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Home >> Buick >> 2014 >> Verano Base >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System, And Navigation System >> Diagnostic Information and Procedures >> DTC B1020: Auxiliary Electronic Control Unit >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON.
  2. Verify DTC B1020 is not set.
    • If DTC B1020 is set 

      Replace the A22 Radio Controls.

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