B3275

DTC B3275

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 B3275 02
- Window Express UP or Down Circuit Short to Ground




Circuit Description

The express Up function of the power windows is monitored and controlled by the front and rear door modules and the individual window sensors. Each power window motor has a window sensor mounted to it. Each door module communicates with its power window sensor via the power window motor up/down command lines. The power window motors communicate with the door modules via the power window status circuit. The window sensors detect differences in the window motors electrical pulses to determine if there is an obstruction to the travel of the window glass. The power window motors will disable the express up movement of a window in the event that an object has obstructed the windows upward movement.


The power window status circuit is a unique 1-way serial data link between the door module and its power window sensor. The power window motors communicate with there associated door modules by changing the state from high to low over the power window status circuit.


Conditions for Running the DTC

* The PDM, LRDM, or RRDM must be powered.
* DTC B1325 Battery Voltage Out of Range, must not be current.



Conditions for Setting the DTC

The PDM, LRDM, or RRDM detects that the express window switch has been closed for 30 continuous seconds.


Action Taken When the DTC Sets

* The PDM, LRDM, or RRDM will disable express window functions for the effected window.
* All other window functions for that window will still operate.



Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* You issue a scan tool CLEAR DTCs command.
* A history DTC will clear once 40 consecutive malfunction free ignition cycles have occurred.



Reference Information
Schematic Reference

Moveable Window Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Power Windows Description and Operation (Power Windows 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 inoperative passenger window switch.
2. Ignition ON, verify the scan tool passenger window switch parameter is IDLE.

• If not the specified value, test the appropriate power window switch express signal circuit for a short to ground. If the circuits tests normal, replace the appropriate door control module.

3. If all circuits test normal, test or replace the inoperative passenger window switch.



Repair Instructions

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

* Front Side Door Window Switch Replacement (Front Side Door Window Switch Replacement)
* Rear Side Door Window Switch Replacement (Rear Side Door Window Switch Replacement)
* Control Module References (Programming and Relearning)for PDM, LRDM, or RRDM replacement, setup, and programming