B3812
DTC B3812
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 Instructions provides an overview of each diagnostic category
DTC Descriptor
DTC B3812 00
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Content Theft System Sensor Ground Circuit
Diagnostic Fault Information
Circuit/System Description
When the content theft deterrent (CTD) system arms and the inclination and intrusion sensors are enabled, the body control module (BCM) receives a power-up acknowledgement from the sensors via the sensor signal circuit.
Conditions for Running the DTC
* The inclination and intrusion sensors are enabled
* The CTD system has armed
Conditions for Setting the DTC
The BCM does not receive the power-up acknowledgement from the inclination and intrusion sensors
Action Taken When the DTC Sets
The BCM will ignore all inputs from the inclination and intrusion sensors for the remainder of the CTD system arming cycle
Conditions for Clearing the DTC
A current DTC will clear when the BCM receives a power-up acknowledgement during the next CTD system arming cycle
Reference Information
Schematic Reference
Theft Deterrent System Schematics Theft Deterrent System Schematics
Connector End View Reference
Component Connector End Views A/C Compressor Clutch
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
Refer to Control Module References Control Module References for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the inclination sensor.
2. 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. Disconnect the harness connector at the intrusion sensor.
4. 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.
5. Ignition OFF, disconnect the harness connector at the intrusion sensor.
6. Ignition ON, 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.
7. Ignition OFF, disconnect the X7 harness connector at the BCM.
8. Ignition ON, test for less than 1 volt between the following signal circuit terminals and ground:
* Terminal 12
* Terminal 15
• If greater than the specified range, test the signal circuit for a short to ground.
9. Test for infinite resistance between the following signal circuit terminals and ground:
* Terminal 12
* Terminal 15
• 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 following signal circuit terminals:
* Terminal 12 at the BCM and terminal B at the intrusion sensor
* Terminal 15 at the BCM and terminal C at the intrusion sensor
• If greater than the specified range, test the signal circuit for an open/high resistance.
11. If all circuits test normal, test or replace the intrusion sensor. If the DTC resets, replace the BCM.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure
Control Module References Control Module References for BCM replacement, setup, and programming