Diagnostic Fault Information
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+ | 1 | 1 | -- | -- |
Inclination Sensor Signal | 1 | 1 | 1 | -- |
Ground | -- | 1 | -- | -- |
1. Inclination Sensor Malfunction | ||||
Circuit/System Description
The inclination sensor detects changes in the parked angle of the vehicle. If a change greater than 3 degrees for a 7 second period is detected, the vehicles 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.
Diagnostic Aids
The inclination sensor is a dealer installed accessory. Not all vehicles are equipped with an inclination sensor. To determine if a particular vehicle is equipped with an inclination sensor, visually inspect the installation location for the sensor based on the information contain in the installation instructions.
Reference Information
Schematic Reference
Theft Deterrent System Schematics
Connector End View Reference
Description and Operation
Content Theft Deterrent (CTD) Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
Without Accessory Shock Sensor
- Ignition OFF, disconnect the harness connector at the inclination sensor.
- Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
- Test for B+ between the signal circuit terminal 3 and ground.
- Ignition OFF, connect the harness connector at the inclination sensor. Disconnect the X7 harness connector at the BCM.
- Ignition ON, test for B+ between the signal circuit terminal 15 and ground.
- If all circuits test normal, test or replace the inclination sensor.
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
| ⇒ | 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. |
| ⇒ | 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. |
With Accessory Shock Sensor
- Ignition OFF, disconnect the harness connector at the inclination sensor and the harness connector at the shock sensor.
- Ignition ON, verify a test lamp illuminates between the inclination sensor B+ circuit terminal 1 and ground.
- Test for B+ between the signal circuit terminal 3 and ground.
- Ignition OFF, connect the harness connector at the inclination sensor. Disconnect the X7 harness connector at the BCM.
- Ignition ON, test for B+ between the BCM signal circuit terminal 15 and ground.
- Ignition OFF, connect the harness connector at the shock sensor.
- Ignition ON, test for B+ between the BCM signal circuit terminal 15 and ground.
- If all circuits test normal, test or replace the inclination sensor.
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
| ⇒ | 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. |
| ⇒ | 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. |
| ⇒ | If not the specified value, test or replace the shock sensor. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup, and programming
