B3152
DTC B3152
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 Descriptor
DTC B3152
- Lock Switch Circuit Low
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
The body control module (BCM) detects a short to ground in the passenger door lock switch lock control circuit for greater than 60 seconds.
Action Taken When the DTC Sets
The driver or passenger door lock switch may 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 ([1][2]Electrical Diagrams)
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
Ignition ON, command the driver door to UNLOCK and all doors to LOCK with a scan tool. The driver door should perform the UNLOCK function and all doors should perform the LOCK function.
Circuit/System Testing
1. Ignition OFF, disconnect the X2 harness connector at the driver door lock window switch.
2. Disconnect the harness connector at the passenger door lock window switch.
3. Connect a test lamp between the driver door lock switch control circuit terminal 7 and B+.
4. Ignition ON, command the doors to LOCK with a scan tool. The test lamp should illuminate during the LOCK command.
• 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.
• If the test lamp is always ON, test the control circuit terminal for a short to ground. If the circuit tests normal, replace the BCM.
5. Ignition OFF, connect the harness connector at the passenger door lock window switch and disconnect the harness connector at the BCM.
6. Ignition ON, command the doors to LOCK by using the passenger door lock window switch. The test lamp should illuminate during the LOCK command.
• If the test lamp is always OFF, replace the passenger door lock window switch.
• If the test lamp is always ON, replace the passenger door lock window switch.
7. If all circuits test normal, replace the driver door lock window switch.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Door Lock Switch Replacement - Driver Door (Service and Repair)
* Door Lock Switch Replacement - Passenger Front (Service and Repair)
* Control Module References (Programming and Relearning)for BCM replacement, setup and programming