Power Window Motor: Description and Operation

GF72.29-P-6030SX Power Window Motor, Component Description
- up to model year 08

Component Identification:

Location (model 221)
The power window motors are located on the inner door panel of the door in question.

Location (model 216)
The front power window motors are located on the inner door panel of the corresponding door and the rear power window motors are located in the inner side of the side wall behind the door entrance panel area.

Task
The power window motors serve for opening and closing the front and rear side windows.

Position detection
The position counter in the corresponding door control unit (N69/1, N69/2, N69/3, N69/4) (model 221) or left door control unit (N69/1), right door control unit (N69/2) and rear control unit (N22/6) (model 216) evaluates the signals of the Hall sensors for the power window motors.Depending on the actuation direction, the counter is increased when "opening" and correspondingly decreased when "closing". The zero position is set by normalization.

Direction recognition
The running direction is recognized by evaluating the signals of the two Hall sensors which are located offset 90° on each power window motor shaft. Each edge of the Hall sensors is evaluated for rotation recognition.