Diagnostic Instructions
| • | 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 |
|---|---|---|---|---|
Inclination Sensor B+ | 1 | 1 | -- | -- |
Intrusion Sensor B+ | 2 | 2 | -- | -- |
Inclination/Intrusion Sensor Armed Signal | 1, 2 | 1, 2 | 1, 2 | -- |
Inclination Sensor Signal | 1 | 1 | 1 | -- |
Intrusion Sensor Signal | 2 | 2 | 2 | -- |
1. Inclination Sensor Malfunction 2. Intrusion Sensor Malfunction | ||||
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, rear (auxiliary) body control module (RBCM) 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
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
- 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.
- Ignition OFF, disconnect the X7 harness connector at the BCM.
- Ignition ON, test for less than 1 volt between the signal circuit terminal 15 and ground.
- Test for infinite resistance between the signal circuit terminal 15 and ground.
- 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.
- Ignition OFF, disconnect the X1 harness connector at the RBCM.
- Ignition ON, test for less than 1 volt between the signal circuit terminal B10 and ground.
- Test for infinite resistance between the signal circuit terminal B10 and ground.
- 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 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 greater than the specified range, test the signal circuit for a short to ground. |
| ⇒ | If less than the specified value, test the signal circuit for a short to ground. |
| ⇒ | If greater than the specified range, test the signal circuit for an open/high resistance. |
| ⇒ | If greater than the specified range, test the signal circuit for a short to ground. |
| ⇒ | If less than the specified value, test the signal circuit for a short to ground. |
| ⇒ | If greater than the specified range, test the signal circuit for an open/high resistance. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM and RBCM replacement, setup, and programming |
