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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 333 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> DTC B3938: Fuel Fill Door Actuator Lock Circuit >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify all vehicle doors lock and unlock when commanding the All Doors Lock/Unlock with a scan tool.
    • If all doors lock and unlock 
  3. Verify the M97 Fuel Fill Door Lock Actuator does not release the fuel filler door when commanding the All Doors Lock/Unlock to Lock with a scan tool.
    • If the M97 Fuel Fill Door Lock Actuator releases the fuel filler door 

      Refer to Circuit/System Testing.

    • If the M97 Fuel Fill Door Lock Actuator does not release the fuel filler door 
  4. Verify the M97 Fuel Fill Door Lock Actuator releases the fuel filler door when commanding the All Doors Lock/Unlock to Unlock with a scan tool.
    • If the M97 Fuel Fill Door Lock Actuator does not release the fuel filler door 

      Refer to Circuit/System Testing.

    • If the M97 Fuel Fill Door Lock Actuator releases the fuel filler door 
  5. All OK.
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