Intrusion Sensor Inoperative

Intrusion Sensor Inoperative

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Circuit/System Description

The Vehicle Intrusion Sensor is a component of the Content Theft Deterrent system which monitors the vehicle interior and provides an alarm signal to the body control module (BCM) in the event of an unauthorized entry into the vehicles interior. The Intrusion sensor ground is controlled through a switched ground output from the BCM. By providing ground from the BCM the Intrusion sensor is powered-up and activated.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the intrusion sensor.
2. Ignition OFF, test for less than 1.0 ohm of resistance between the low reference circuit terminal C and ground.

• If greater than the specified range, test the low reference circuit for an open/high resistance.

3. 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.

4. Test for B+ between the Intrusion Sensor Alarm On Signal circuit terminal B and ground.

• If not the specified value, test the signal circuit terminal 3 for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

5. If all circuits test normal, replace the intrusion sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Refer to Control Module References for BCM and XBCM replacement, setup, and programming.