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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Theft Deterrent >> Diagnostic Information and Procedures >> Content Theft Deterrent (CTD) Does Not Disarm with Key Lock >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the driver door latch assembly.
  2. Ignition OFF, test for less than 10 ohms of resistance between the low reference circuit terminal 8 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the DDM.
  3. Ignition ON, verify the scan tool Door Key Cyl. Unlock Switch parameter is Idle.
    • If not the specified value, test the signal circuit terminal 9 for a short to ground. If the circuit tests normal, replace the DDM.
  4. Install a 3A fused jumper wire between the signal circuit terminal 9 and ground. Verify the scan tool Door Key Cyl. Unlock Switch parameter is Unlock.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the DDM.
  5. If all circuits test normal, test or replace the door latch assembly.
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