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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 >> Component Testing

Component Testing

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 OFF, disconnect the harness connector at the M97 Fuel Fill Door Lock Actuator.
  2. Install a 25 A fused jumper wire between one of the control terminals and 12 V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the M97 Fuel Fill Door Lock Actuator should perform the LOCK and UNLOCK function.
    • If the actuator does not perform the LOCK and UNLOCK function 

      Replace the M97 Fuel Fill Door Lock Actuator.

    • If the actuator performs the LOCK and UNLOCK function 
  3. All OK
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