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Home › Chevrolet › 2012 › Volt › Repair and Diagnosis › Body & Frame › Door Locks › Power Door Lock System And Release Systems › Diagnostic Information and Procedures › DTC B3618 › Circuit/System Testing

Circuit/System Testing

  1. Vehicle OFF, disconnect the harness connector at the S46 liftgate handle switch. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 Ω between the ground circuit terminal 2 and ground.
    • If 10 Ω or greater 
    1. Vehicle OFF.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • If less than 10 Ω 
  3. Vehicle in Service Mode.
  4. Verify the scan tool Trunk Lid/Liftgate Window Exterior Unlatch Switch parameter is Inactive.
    • If not Inactive 
    1. Vehicle OFF, disconnect the harness connector at the K9 body control module.
    2. Test for infinite resistance between the signal circuit terminal 1 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K9 body control module.
    • If Inactive 
  5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 2.
  6. Verify the scan tool Trunk Lid/Liftgate Window Exterior Unlatch Switch parameter is Active.
    • If not Active 
    1. Vehicle OFF, disconnect the harness connector at the K9 body control module, Vehicle in Service Mode.
    2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    3. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K9 body control module.
    • If Active 
  7. Test or replace the S46 liftgate handle switch.
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