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Home >> Cadillac >> 2019 >> XT5 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 103 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> DTC B3938 >> Component Testing
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Component Testing

WARNING: This page is about a different car, the 2018 Cadillac XT5. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: M97 Fuel Fill Door Lock Actuator
  3. Connect a 20 A fused jumper wire between the test points: Control terminal 1 & 12 V
    4. CAUTION:

    Complete the testing as quickly as possible in order to prevent overheating and damaging the component.

  4. Momentarily connect a jumper wire between the test points: Control terminal 2 & Ground

    Reverse the jumper wires 2 times between the terminals.

    Verify the component works as specified: M97 Fuel Fill Door Lock Actuator = Lock/Unlock

    • If not the specified state 

      Replace the component: M97 Fuel Fill Door Lock Actuator

    • Go to next step: If the specified state 
  5. All OK.
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