Position recognition of power windows, function - GF72.29-P-4000KA
MODELS 208.435 /444 /445 /447 /448 /465 /470
Rotational direction recognition of the front power windows
Front power window
Rotational direction recognition
The two Hall sensors b1 and b2 are located at the shaft of the motor in the power window. They react to movements of the magnet. The Hall sensors supply one square-wave pulse for each rotation of the motor.
The corresponding door control module (N69/1) or (N69/2) , inputs the pulses from the Hall sensors. From the time difference between the pulses from Hall sensor b1 and the pulses from Hall sensor b2 the door control module determines the motor's direction of rotation.
Position recognition
The corresponding door control module counts the pulses from the Hall sensors as a function of the determined rotational direction of the motor in the power window. The value in the position counter is increased when the window closes. In the other direction, the value in the position counter is reduced when the window opens. The zero position is defined as the upper lock-up point , i.e. when the window is completely open the counter should be at zero. The zero position is set by the normalization function. If the zero position is exceeded in the open direction, the count becomes negative.
Rear power windows
Rotational direction recognition
Rotational direction recognition is not provided, the rotational direction can be determined if necessary from the polarity of the motor.
Position recognition
The position recognition of the rear side windows is limited to the recognition of the upper and lower limit positions, intermediate positions are not determined.
The roll bar (RB)/soft-top operation control module (N52) during operation measures the power consumption of the left rear power window motor (M10/5) and right rear power window motor (M10/6) . If the rear side windows reach their limit positions (upper/lower), then the current intensity increases considerably as a result of the lock-up in each motor. From this N52 recognizes the limit positions and then switches off the motors.
| Normalization of power windows | GF72.29-P-4003A | ||
| Lock-up recognition of power windows | GF72.29-P-4001KA | ||
| Door control module front driver side | GF72.29-P-4105A | ||
| Door control module front passenger side | GF72.29-P-4106A | ||
| Power windows in front doors | GF72.29-P-4101A | ||
| Roll bar/soft-top operation control module, location/task/design/function | GF77.39-P-3100KA |