GF72.29-P-4000SK Power Window Position Recognition, Function

GF72.29-P-4000SK Power Window Position Recognition, Function
- up to model year 08

Function
Two Hall sensors offset 90° are located on the motor shaft for the left front power window motor (M10/3) and right front power window motor (M10/4). These react to the motion of the left front power window motor (M10/3) and right front power window motor (M10/4) and supply one pulse each per motor shaft rotation.

Direction recognition
The rotation direction is recognized by the left door control unit (N69/1) and right door control unit (N69/2) based on the time offset of the pulses.

Position recognition
The left door control unit (N69/1) and right door control unit (N69/2) count the pulses from the Hall sensor taking into consideration the direction of rotation in the position counter. The value in the position counter is reduced when the window closes. When the window opens, the value in the position counter is increased. The zero position is defined as the upper mechanical limit stop, i.e. when the window is fully closed, the counter should be at zero. The zero position is set through synchronization.

The position recognition and rotation recognition is not realized for the left rear power window motor (M10/5) and right rear power window motor (M10/6).