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° 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 intrusion sensor. To determine if a particular vehicle is equipped with an inclination sensor, view the scan tool Cal. Part No. 2 parameter. This parameter can be found in the BCM Calibration ID menu.
Reference Information
Schematic Reference
Theft Deterrent System Schematics
Connector End View Reference
Theft Deterrent System Connector End Views
Description and Operation
Content Theft Deterrent (CTD) Description and Operation
Electrical Information Reference
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the inclination sensor.
- Ignition OFF, test for less than 1 ohm of resistance between the ground circuit terminal 4 and ground.
- Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
- Verify the scan tool Hood Ajar Switch parameter is Inactive.
- Install a 3 A fused jumper wire between the signal circuit terminal 3 and the ground circuit terminal 4. Verify the scan tool Hood Ajar Switch Parameter is Active.
- If all circuits test normal, test or replace the inclination sensor.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
Important: Because of how the accessory inclination sensor is integrated into the vehicle, the inclination sensor uses the Hood Ajar Switch parameter to indicate its status. The Hood Ajar Switch parameter must be used when diagnosing the inclination sensor.
| ⇒ | If not the specified value, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the BCM. |
| ⇒ | If not the specified value, test the signal circuit for a short to voltage or and open/high resistance. If the circuit tests normal, replace the BCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup, and programming.
