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Home >> Chevrolet >> 2013 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 189 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> DTC B2500: Driver Exterior Unlock Switch >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2015 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the A23D door latch assembly-driver. 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 8 and ground.
    • If 10 Ω or greater 
    1. Ignition 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. Ignition ON.
  4. Verify the scan tool Driver Door Key Unlock Switch parameter is Inactive.
    • If not Inactive 
    1. Ignition OFF, disconnect the harness connector at the S79D window switch-driver.
    2. Test for infinite resistance between the signal circuit terminal 9 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the S79D window switch-driver.
    • If Inactive 
  5. Install a 3 A fused jumper wire between the signal circuit terminal 9 and the ground circuit terminal 8.
  6. Verify the scan tool Driver Door Key Unlock Switch parameter is Active.
    • If not Active 
    1. Ignition OFF, disconnect the harness connector at the S79D window switch-driver, ignition ON.
    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 S79D window switch-driver.
    • If Active 
  7. Test or replace the A23D door latch assembly-driver.
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