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• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
The body control module (BCM) monitors, receives and transmits serial data to each of the doors switches and window motors. When a window switch has been activated on the driver window switch, a signal is sent to the BCM which sends a signal to the appropriate window motor and the window motor will move in the direction commanded.
• | The ignition switch is in the ON position. |
• | Battery voltage must be between 9-16 V. |
The BCM has detected that the compatibility code stored in the affected window motor does not match the compatibility code stored in the BCM.
An internal malfunction has been detected by the BCM in the power window motor while commanding the window UP or DOWN.
The BCM will automatically attempt to download the calibration program into the appropriate window motor (As will occur when the window motor has been replaced), if the first calibration program fails to load, the BCM will attempt to download the calibration program a second time. If this download fails, the BCM will set appropriate DTC.
The BCM detects that a window motor is "not normalised" which will 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 |
The affected motor will be inoperative.
The affected motor will not perform the express up or express down functions and the driver information centre will display Open, then Close Driver Window or will display Open, then Close Passenger Window.
Installing a compatible window motor for that specific make and model vehicle.
The affected power window motor must be programmed before the DTC can be cleared.
The affected power window motor must be programmed before the DTC can be cleared.
The appropriate window motor must be normalised before the DTC can be cleared.
Power Windows Description and Operation
Control Module References for scan tool information
Note: If the window performs the UP and DOWN functions, clear the DTC
Note: The doors must be completely closed prior to normalising the windows, a door that is open or ajar may cause the power window to function abnormally or it may become inoperative while performing the normalisation procedure. If this occurs, verify that the door is completely closed then repeat the normalisation procedure.
⇒ | If the M74 Window Motor does not perform as specified and the DTC resets, replace the M74 Window Motor. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup and programming |
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