B3135

DTC B3130 or B3135

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptors
DTC B3130 00
- Doors Unlock Circuit Malfunction

DTC B3135 00
- Doors Lock Circuit Malfunction




Diagnostic Fault Information






Circuit/System Description

Pressing the liftgate release switch closes a contact providing a ground for the liftgate release switch signal circuit. The rear fuse block will detect the voltage drop and command voltage to be supplied to the relay control circuit thus energizing the TRUNK RELEASE relay which provides voltage to the liftgate latch releasing the liftgate.


Conditions for Running the DTC

The system voltage must be between 9-16 volts.


Conditions for Setting the DTC

The rear fuse block detects an open in the TRUNK RELEASE Relay B+ circuit


Action Taken When the DTC Sets

The power door locks and liftgate release will be inoperative.


Conditions for Clearing the DTC

* The DTC will be current for as long as the fault is present.
* When the fault is no longer present, the DTC will become a history DTC.
* A history DTC will clear after 50 ignition cycles.



Diagnostic Aid

These DTCs will set if the F38 fuse is open.


Reference Information
Schematic Reference

Door Lock/Indicator Schematics (Door Lock/Indicator Schematics)
Connector End View Reference

Component Connector End Views (Connector 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

Control Module References (Programming and Relearning) for scan tool information


Circuit/System Verification

Command the liftgate latch to release by pressing the liftgate release switch. The liftgate latch should release the liftgate.


Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the liftgate latch assembly.
2. Connect a test lamp between the control circuit terminal 1 and ground.
3. Command the liftgate release ON and OFF by pressing and releasing the liftgate release switch. The test lamp should turn ON and OFF when changing between the commanded states.

• If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance.
• If the test lamp is always ON, test the control circuit for a short to voltage.

4. If all circuits test normal, replace the rear fuse block.



Repair Instructions

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


Control Module References (Programming and Relearning) or rear fuse block replacement, setup, and programming