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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1397 (Theft Deterrent System) >> Diagnostic Information and Procedures >> Inclination Sensor Inoperative >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Without Accessory Shock Sensor

  1. Ignition OFF, disconnect the harness connector at the inclination sensor.
  2. 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 an open/high resistance.
  3. Test for B+ between the signal circuit terminal 3 and ground.
    • If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. Ignition OFF, connect the harness connector at the inclination sensor. Disconnect the X7 harness connector at the BCM.
  5. Ignition ON, test for B+ between the signal circuit terminal 15 and ground.
    • If not the specified value, test the signal circuit for a short to ground or and open/high resistance. If the circuit tests normal, replace the inclination sensor.
  6. If all circuits test normal, test or replace the inclination sensor.

With Accessory Shock Sensor

  1. Ignition OFF, disconnect the harness connector at the inclination sensor and the harness connector at the shock sensor.
  2. Ignition ON, verify a test lamp illuminates between the inclination sensor B+ circuit terminal 1 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  3. Test for B+ between the signal circuit terminal 3 and ground.
    • If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. Ignition OFF, connect the harness connector at the inclination sensor. Disconnect the X7 harness connector at the BCM.
  5. Ignition ON, test for B+ between the BCM signal circuit terminal 15 and ground.
    • If not the specified value, test the signal circuit for a short to ground or and open/high resistance. If the circuit tests normal, test or replace the inclination sensor.
  6. Ignition OFF, connect the harness connector at the shock sensor.
  7. Ignition ON, test for B+ between the BCM signal circuit terminal 15 and ground.
    • If not the specified value, test or replace the shock sensor.
  8. If all circuits test normal, test or replace the inclination sensor.
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