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Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information and Procedures >> DTC B11BB >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify the scan tool Right Front Door Ajar Switch parameter changes between Inactive and Active when opening and closing the passenger door.
    • Go to next step: If the parameter changes 
  3. Verify the scan tool Passenger Door Open Switch parameter changes between Inactive and Active when opening and closing the passenger door.
    • If the parameter does not change 

      Refer to Circuit/System Testing

    • Go to next step: If the parameter changes 
  4. All OK.
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