B3130

DTC B3125, B3130, or B3135

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 Descriptors

DTC B3125 00

-
Left Front/Driver Door Only Unlock Circuit

DTC B3130 00

-
All Door Unlock Circuit

DTC B3135 00

-
All Door Lock Circuit

Diagnostic Fault Information






Circuit/System Description

The body control module (BCM) controls the door lock, passenger door unlock and driver door unlock relays. Voltage is applied to the appropriate relay through the door lock/unlock control circuit when the BCM detects a door lock/unlock switch activation or a keyless entry lock or unlock command.

Conditions for Running the DTC

The system voltage is 9-16 volts.

Conditions for Setting the DTC

B3125 00

The BCM detects a fault in the driver door unlock control circuit while commanding the DRV UNLCK relay.

B3130 00

The BCM detects a fault in the door unlock control circuit while commanding the PASS/CARGO UNLCK relay.

B3135 00

The BCM detects a fault in the door lock control circuit while commanding the ALL DOORS LOCK relay.

Action Taken When the DTC Sets

The power door locks will malfunction

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 be a history DTC.

* A history DTC will clear after 50 ignition cycles.

Reference Information

Schematic Reference

Door Lock/Indicator Schematics Door Lock/Indicator Schematics

Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)

Description and Operation

Power Door Locks Description and Operation Description and Operation

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

Control Module References Control Module References for scan tool information

Circuit/System Verification

Command the driver door and passenger door lock actuators to LOCK and UNLOCK by using the door lock switch, the doors should perform LOCK and UNLOCK function.

Circuit/System Testing

1. Ignition OFF, disconnect the X1 and X2 harness connectors at the body fuse block.

2. Connect a test lamp between the appropriate control circuit terminal listed below and B+:

* Control circuit terminal 11

* Control circuit terminal 18

3. Ignition ON, command the doors to UNLOCK by using the door lock switch. The test lamp should briefly illuminate when commanding the UNLOCK state.

• If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.

• If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.

4. Connect a test lamp between the control circuit terminal 5 and ground.

5. Command the doors to LOCK by using the door lock switch. The test lamp should briefly illuminate when commanding the LOCK state.

• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.

• If the test lamp is always OFF, test the control circuit for a short to ground or and open/high resistance. If the circuit tests normal, replace the BCM.

6. If all circuits test normal, replace the body fuse block.

Repair Instructions

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

* Body Wiring Harness Junction Block Replacement Body Wiring Harness Junction Block Replacement

* Control Module References Control Module References for BCM replacement, setup, and programming