Power Window Motor: Description and Operation

6454 Window lifter motor

The motor and electronics for the power windows are now located in the dry zone in the door, instead of in the wet zone as on the previous model. This means that the mechanism and the power window motor can be quickly and easily accessed by releasing just a few screws on the door-trim panel, making the system easier to maintain.







The door control unit is now connected to the CAN bus. This has resulted in a considerable improvement in both anti-pinch protection and thermal overload protection. A connection to the vehicle network means that the door control unit can now avail of more information for vehicle diagnosis.

The controls for the power windows are now located in the door-trim panels along with the memory buttons for the optional fully electric seats.

The door control unit is the nodal control unit in the driver and front passenger door and controls all electrical functions in the doors.

The following components are connected to the door control unit:
- Electric windows
- Door lock
- Inside door handle switch/outside door handle switch
- Door Mirrors
- Operating switches (window lifter, memory, door mirror)
- Lighting devices in the door
- CAN bus

The door control unit is responsible for the following functions:
- Window lifters (opening/closing of windows)
- Adjustment of electric door mirror
- Central Locking
- Door lighting

In response to the short-stroke command, the window concerned is lowered by 7 % of the complete opening distance.

The short-stroke command is effected via:
- the outside door handle switch
- the inside door handle switch
- the rotary latch contact

The current window position is relayed via the CAN signal to other control units, which evaluate this information not with regard to the short stroke, but in terms of "window open/closed".