Inclination Sensor Malfunction

Inclination Sensor Malfunction

Diagnostic Instructions

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

Circuit/System Description

The inclination sensor detects changes in the angle of the vehicle while parked. B+ is supplied to the inclination sensor at all times and the body control module (BCM) arms the sensor using the armed signal circuit. If a change greater than 3 degrees for a 7 second period is detected, auxiliary body control module (XBCM) is informed via the inclination sensor signal circuit and the content theft alarm is sounded. The sensor recalibrates itself each time the vehicle is parked, which allows it to account for parking on steep grades without unintentional activation.

Reference Information
Schematic Reference

Theft Deterrent System Schematics Theft Deterrent System Schematics
Connector End View Reference

Component Connector End Views Connector Views
Description and Operation

Theft Systems Description and Operation Theft Systems
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module Referencesfor scan tool information

Circuit/System Testing

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. Ignition OFF, disconnect the X7 harness connector at the BCM.
4. Ignition ON, test for less than 1 volt between the signal circuit terminal 15 and ground.

• If greater than the specified range, test the signal circuit for a short to ground.

5. Test for infinite resistance between the signal circuit terminal 15 and ground.

• 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 signal circuit terminal 15 at the BCM and the signal circuit terminal 4 at the inclination sensor.

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

7. Ignition OFF, disconnect the X1 harness connector at the XBCM.
8. Ignition ON, test for less than 1 volt between the signal circuit terminal B10 and ground.

• If greater than the specified range, test the signal circuit for a short to ground.

9. Test for infinite resistance between the signal circuit terminal B10 and ground.

• If less than the specified value, test the signal circuit for a short to ground.

10. Test for less than 2 ohms of resistance between the signal circuit terminal B at the RBCM and the signal circuit terminal 3 at the inclination sensor.

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

11. Disconnect the X3 harness connector at the BCM.
12. Ignition ON, test for less than 1 volt between the signal circuit terminal 7 and ground.

• If greater than the specified range, test the signal circuit for a short to ground.

13. Test for infinite resistance between the signal circuit terminal 7 and ground.

• If less than the specified value, test the signal circuit for a short to ground.

14. Test for less than 2 ohms of resistance between the signal circuit terminal B9 at the RBCM and the signal circuit terminal 7 at the BCM.

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

15. If all circuits test normal, test or replace the inclination sensor. If the DTC resets, replace the XBCM.

Repair Instructions

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

* Theft Deterrent Vehicle Inclination Sensor Replacement Service and Repair
* Control Module References Control Module Referencesfor BCM and XBCM replacement, setup, and programming