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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Theft Deterrent) >> Diagnostic Information and Procedures >> Inclination Sensor Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition Off, disconnect the harness connector at the inclination sensor.
  2. Ignition OFF, test for less than 1 ohm of resistance between the ground circuit terminal 4 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or open/high resistance.
    IMPORTANT: Because of how the accessory inclination sensor is integrated into the vehicle, the inclination sensor uses the Hood Ajar Switch parameter to indicate its status. The Hood Ajar Switch parameter must be used when diagnosing the inclination sensor.
  4. Verify the scan tool Hood Ajar Switch parameter is Inactive.
    • If not the specified value, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the BCM.
  5. Install a 3 A fused jumper wire between the signal circuit terminal 3 and the ground circuit terminal 4. Verify the scan tool Hood Ajar Switch Parameter is Active.
    • If not the specified value, test the signal circuit for a short to voltage or and open/high resistance. If the circuit tests normal, replace the BCM.
  6. If all circuits test normal, test or replace the inclination sensor.
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