Shock Sensor Inoperative
Shock 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 Shock Sensor is a component of the Content Theft Deterrent system which monitors the vehicle for shock impacts. The shock sensor provides an alarm signal to the body control module (BCM) in the attempt that the vehicle is being tampered with. The sensor ground is controlled through a switched ground output from the BCM. By providing ground from the BCM the 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. 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 shock sensor.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
Refer to Programming and Relearning for BCM setup and programming. Programming and Relearning