B3145

DTC B3145 or B3155

DTC Descriptor
DTC B3145
- Right Front/Passenger Unlock Switch Circuit Low

DTC B3155
- Right Front/Passenger Lock Switch Circuit Low

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview






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. For more detailed information concerning power door lock operation refer to Power Door Locks Description and Operation.

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.

Circuit/System Testing

1. Ignition OFF, disconnect the passenger door lock switch harness connector.
2. Test for less than 1 of resistance between the ground circuit terminal C and ground.

• If greater than the specified range, 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 after completing the diagnostic procedure. Verification Tests

* Power Door Lock Switch Replacement - Passenger Front
* Refer to Programming and Relearning. Programming and Relearning