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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Power Door Lock System And Release Systems >> Diagnostic Information and Procedures >> Fuel Filler Door Release Malfunction >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the M97 fuel door lock actuator.
  2. Connect a test lamp between control circuit terminal 1 and control circuit terminal 2, ignition ON.
  3. Verify the test lamp turns ON when commanding the All Doors Lock/Unlock to Lock and Unlock with a scan tool.
    • If the test lamp remains OFF during either of the commands 
    1. Ignition OFF, disconnect the harness connector at the K9 Body control module.
    2. Test for infinite resistance between each control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K9 Body control module.
    3. Test for less than 2Ω in each control circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω, replace the K9 Body control module.
    • If the test lamp turns ON during each of the commands 
  4. Test or replace the M97 fuel door lock actuator.
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