B320A

DTC B320A

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 B320A 39
- Front Door Window Motor Internal Electronic Failure

DTC B320A 42
- Front Door Window Motor Calibration Data Set Not Programmed

DTC B320A 4B
- Front Door Window Motor Calibration Not Learned

Diagnostic Fault Information






Circuit/System Description

The front door power window motors communicate with the driver door lock/window switch and passenger door lock/window switch via serial data. The motors contain a logic module which must be normalized or programmed any time the window motor is serviced to provide proper operation and communication between door modules and window motors.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

B320A 39

An internal malfunction or a momentary voltage spike has been detected by the driver door lock/window switch or passenger door lock/window switch in the front power window motor while commanding the window UP and DOWN.

B320A 42 or B320A 4B

A not normalized or programmed driver or front passenger door power window motor occur under the following conditions:

* When the battery has been disconnected

* When the battery has been replaced

* When the door wiring harness has been disconnected

* When the window motor has been disconnected.

Action Taken When the DTC Sets

B320A 39

The motor will be inoperative.

B320A 42, B320A 4B

The motor will not perform the express up or express down functions.

Conditions for Clearing the DTC

B320A 39

The appropriate window motor must be replaced before the DTC can be cleared.

B320A 42

The appropriate power window motor must be programmed before the DTC can be cleared.

B320A 4B

The appropriate power window motor must be calibrated before the DTC can be cleared.

Reference Information

Schematic Reference

Moveable Window Schematics Electrical Diagrams

Connector End View Reference

Component Connector End Views A/C Compressor Clutch

Description and Operation

Power Windows Description and Operation Power Windows

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify the driver and passenger functions while commanding the Door Window Test with a scan tool.

• If the Up and Down does not work
Replace the appropriate window motor.

• If the Up and Down works

3. Verify the driver and passenger window performs the Express Up and Express Down functions with the driver window switch.

• If a window does not Express Up and Express Down
Normalize the window motor, refer to Window Motor Programming - Express Function Testing and Inspection.

• If the window performs the Express Up and Express Down functions

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Front Side Door Window Regulator Motor Replacement (Sedan/Wagon) Service and Repair