For 1990-2009 cars only
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 |
DTC Descriptor
DTC B3135 00: All Door Lock CircuitCircuit/System Description
The body control module (BCM) energizes the lock relay coil through a high side drive control circuit. When the BCM receives a lock message voltage is supplied to the door lock control circuit energizing the lock relay coil.
Conditions for Running the DTC
| • | Battery voltage is between 9-16 volts. |
| • | The BCM has attempted to energize the lock relay. |
Conditions for Setting the DTC
The door lock control circuit is shorted to ground.
Action Taken When the DTC Sets
The BCM will not attempt lock operation.
Conditions for Clearing the DTC
| • | When the output request is not active the DTC will be a history status code. |
| • | The history code will clear after 50 fault free ignition cycles or by using the scan tool clear DTCs feature. |
Reference Information
Schematic Reference
Door Lock/Indicator Schematics
Connector End View Reference
Description and Operation
Power Door Locks Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for Scan Tool Information
Circuit/System Testing
- Disconnect the IP fuse block and connect a test lamp from battery voltage to the door unlock control circuit terminal A2 X3.
- Verify that the test lamp does not illuminate.
- If the circuits test normal replace the IP fuse block.
| ⇒ | If the test lamp illuminates test the door lock control circuit for a short to ground. 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, programming, and setup. |
