B3145

DTC B3145 or B3155

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 B3145
- Right Front/Passenger Unlock Switch Circuit Low

DTC B3155
- Right Front/Passenger Lock Switch Circuit Low




Diagnostic Fault Information






Circuit/System Description

The passenger door lock switch signal circuits provide inputs to the passenger door module (PDM) when the passenger door lock switch is activated to the Lock or Unlock position. These inputs allow the PDM to detect a door Lock or Unlock request. The PDM provides power to the passenger door lock switch. When the door lock switch is activated to the Lock or Unlock position, ground is supplied by G202. When the PDM detects low voltage on a signal circuit, it will send a message on the serial data line to the remote control door lock receiver (RCDLR) to enter the power door latches in Lock or Unlock status.


Conditions for Running the DTC

Battery voltage must be between 9-16 volts.


Conditions for Setting the DTC

* The PDM detects a short to ground in the passenger door lock switch lock or unlock signal circuit.
* Condition must be present for greater than 30 seconds.



Actions Taken When the DTC Sets

Stores DTC B3145 or B3155 in PDM memory.


Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* You issue a scan tool CLEAR DTCs command.



Diagnostic Aids

The following conditions may cause an intermittent malfunction:

* There is an intermittent short to ground in the passenger door lock switch lock or unlock signal circuit.
* The passenger door lock switch is shorted to ground internally or is sticking.
* The passenger door lock switch was pressed for longer than 30 seconds.



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 Latch 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)


Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the passenger door lock switch.
2. Ignition OFF, verify that a test lamp illuminates between B+ and the ground circuit terminal C.

• If the test lamp does not illuminate, test the ground circuit for an open/high resistance.

3. Ignition ON, verify the scan tool Door Lock Switch parameter is IDLE.

• If not the specified value, test the appropriate door lock switch signal circuit for a short to ground. If the circuit tests normal, replace the PDM.

4. If all circuits test normal, test or replace the door lock switch.



Repair Instructions

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

* Door Lock Switch Replacement - Passenger Front (Service and Repair)
* Control Module References (Programming and Relearning) for PDM replacement, setup, and programming