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Position recognition of power windows, function - GF72.29-P-4000GH

MODEL 163 as of 1.9.01 

Illustration of power ripples 

Fig 1: Identifying Position Recognition Of Power Windows, Function - Illustration Of Power Ripples
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Function 

The evaluation of the window position is determined by the power ripples:

Each time the power window motor is readjusted it sends a pulse which is evaluated by the microcontroller integrated in the lower control panel control module (N72) 

Each time the armature in the power window motor rotates the direction of the current changes 10 times and the position counter increases or decreases by "10".

When the permissible position ranges are exceeded, the power window motor is desychronized.

  Front power window motor, location/function   GF72.29-P-4108GH 
  Rear power window motor, location/function   GF72.29-P-4109GH 
  Lower control panel control module, location/ purpose/design/function as of 01.09.01 GF54.21-P-4116GH