B3130

DTC B3130

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 B3130 00
- All Door Unlock Circuit




Circuit/System Description

The body control module (BCM) energizes the unlock relay coil through a low side drive control circuit. When the BCM receives an unlock message the door unlock relay control circuit is grounded energizing the unlock relay coil.


Conditions for Running the DTC

* Battery voltage is between 9-16 volts.
* The BCM has attempted to energize the unlock relay.



Conditions for Setting the DTC

The door unlock relay control circuit is shorted to voltage.


Action Taken When the DTC Sets

The BCM will not attempt unlock 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 (Door Lock/Indicator Schematics)
Connector End View Reference

Component Connector End Views (Component Connector End Views)
Description and Operation

Power Door Locks Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Programming and Relearning (Programming and Relearning)for Scan Tool Information


Circuit/System Testing

1. Disconnect the IP fuse block and connect a test lamp from the door unlock relay control circuit terminal A3 in connector X3 to ground.
2. Ignition ON, verify that the test lamp does not illuminate.

• If the test lamp illuminates test the control circuit for a short to voltage. If the circuit tests normal replace the BCM.

3. If the circuits test normal replace the IP fuse block.



Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Instrument Panel Electrical Center or Junction Block Replacement - Left Side (Instrument Panel Electrical Center or Junction Block Replacement - Left Side)
* Programming and Relearning (Programming and Relearning)for BCM replacement, programming, and setup