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 CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Door Lock Relay Control | B3135 00 | 1 | 1 | -- |
1. Power Door Locks Inoperative - All Doors | ||||
Circuit/System Description
When the door lock switch is place in to the LOCK position, ground is applied through the switch to the body control module (BCM). The BCM then applies a voltage through the door lock relay control circuit to the coil side of the lock relay in the body electrical center (BEC). The relay then engages and applies voltage to all the door lock assemblies.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The BCM receives a ground signal on the door lock relay control circuit.
Action Taken When the DTC Sets
The BCM cease attempt to lock the doors.
Conditions for Clearing the DTC
The BCM clears this code from current when the fault is removed from the system.
Reference Information
Schematic Reference
Door Lock/Indicator Schematics
Connector End View Reference
Vehicle Access Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Ignition ON, place the door lock switch to the LOCK position. All doors should lock.
Circuit/System Testing
- Disconnect the Lock relay in the BEC. Verify the DTC resets.
- Disconnect the BEC connector C1. Verify the DTC resets.
- Test for a short to ground in the door lock relay control circuit.
| ⇒ | If the DTC does not reset, replace the Relay. |
| ⇒ | If the DTC does not reset, replace the BEC. |
| ⇒ | If all circuits/connections test 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 |
