B3153

DTC B3152 or B3153

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 B3152
- Lock Switch Circuit Low

DTC B3153
- Lock Switch Circuit High




Diagnostic Fault Information






Circuit/System Description

The driver door lock actuator unlock control circuit is a dedicated control circuit used only for the driver door lock actuator motor. This is done so that the driver door may be unlocked by itself using a keyless entry transmitter or an automatic door unlock function, if programmed.


Conditions for Running the DTC

Battery voltage must be between 9-16 volts.


Conditions for Setting the DTC

B3152

The body control module (BCM) detects a short to ground on the door unlock control circuit for greater than 60 seconds.

B3153

The BCM detects a short to voltage or an open/high resistance in the door unlock control circuit for greater than 60 seconds.


Action Taken When the DTC Sets

The doors will not lock when using the keyless entry transmitter.


Conditions for Clearing the DTC

* This 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 ([1][2]Electrical Diagrams)
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

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


Circuit/System Verification

1. Ignition ON, command the Driver Door Unlock with a scan tool, the driver door should perform the UNLOCK function.
2. Command the Lock All Doors with a scan tool, all doors should perform the LOCK function.
3. Command the driver door to UNLOCK and all doors to LOCK with the keyless entry transmitter, the driver door should UNLOCK and all doors should LOCK.

• If the keyless entry transmitter is inoperative, refer to Keyless Entry System Inoperative (Keyless Entry System Inoperative) .




Circuit/System Testing

1. Ignition OFF, disconnect the harness connector X2 at the driver door lock switch and disconnect the harness connector at the passenger door lock switch.
2. Connect a test lamp between the control circuit terminal 7 and B+.
3. Ignition ON, command the door lock actuators to LOCK with a scan tool. The test lamp should illuminate when commanding the LOCK 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. Ignition OFF, connect the harness connector at the passenger door lock switch.
5. Ignition ON, command the door lock actuators to LOCK by using the passenger door lock switch. The test lamp should illuminate during the LOCK command.

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

6. If all circuits test normal, replace the driver door lock switch.



Repair Instructions

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


Control Module References (Programming and Relearning) for BCM replacement, setup, and programming