GF77.20-D-2047H Rear Sliding Roof Unit Position Measurement, Function

GF77.20-D-2047H Rear Sliding Roof Unit Position Measurement, Function

- with CODE (D24) Power tilting/sliding roof, passenger compartment






Direction of rotation recognition

1 Square wave pulses from rear tilting/ sliding roof Hall sensor (M12/1b1)
2 Square wave pulses from rear tilting/ sliding roof Hall sensor (M12/1b2)
360° One rotation of motor shaft

Position measurement

Function requirements:
- Circuit 30
- No overvoltage or undervoltage
Overvoltage is present when voltage > 16.5 V. Undervoltage is present when voltage < 9 V.

The position counter in the DBE control unit (N70) counts the Hall sensor pulses depending on the recognized direction of rotation of the rear tilting/sliding roof Hall sensors on the rear tilting/sliding roof motor (M12/1m1). The position "Rear tilting/sliding roof (M12/1) closed" is defined as the zero position, i. e., if the rear tilting/sliding roof is closed, the position counter should be set to zero. The zero position is set by the "normalization" or "renormalization" function.

Direction of rotation recognition

Function prerequisites:
- Circuit 30
- No overvoltage or undervoltage
Overvoltage is present when voltage > 16.5 V. Undervoltage is present when voltage < 9 V.

The rear tilting/sliding roof Hall sensors are located on the shaft of the rear tilting/sliding roof motor. They react to the motion of the solenoids located on the rear tilting/sliding roof motor. Each motor shaft rotation supplies one square wave pulse to the rear tilting/ sliding roof Hall sensors.

The DBE control unit reads in these Hall sensors pulses. The time offset of the pulses from the rear tilting/sliding roof Hall sensors in relation to one another allows the DBE control unit to recognize the direction of rotation of the rear tilting/sliding roof.