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Home >> GMC >> 2007 >> Acadia SLT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1225 (Theft Deterrent System) >> Diagnostic Information and Procedures >> Intrusion Sensor Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2013 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the intrusion sensor.
  2. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal A and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  3. Ignition OFF, disconnect the X7 harness connector at the BCM.
  4. Ignition ON, test for less than 1 volt between the following signal circuit terminals and ground:
    • Terminal 12
    • Terminal 15
    • If greater than the specified range, test the signal circuit for a short to ground.
  5. Test for infinite resistance between the following signal circuit terminals and ground:
    • Terminal 12
    • Terminal 15
    • If less than the specified value, test the signal circuit for a short to ground.
  6. Test for less than 2 ohms of resistance between the following signal circuit terminals:
    • Terminal 12 at the BCM and terminal B at the intrusion sensor
    • Terminal 15 at the BCM and terminal C at the intrusion sensor
    • If greater than the specified range, test the signal circuit for an open/high resistance.
  7. If all circuits test normal, test or replace the intrusion sensor. If the DTC resets, replace the BCM.
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