Position sensor, backrest adjustment, electrically operated driver's seat with memory (357Dh)
| Position sensor, backrest adjustment, electrically operated driver's seat with memory (357Dh) |
| Location |
Position sensor, backrest adjustment, electrically operated driver's seat with memory (357Dh) .
| Main task |
To give information that is necessary for the seat control module to be able to calculate the rake of the backrest in relation to the seat.
| Type |
The position sensor (pulse sensor) for the seat is a Hall sensor integrated in the motor that changes the rake of the backrest. The motor shaft has a 2-pole magnetic ring (north/south) mounted on it. There is a Hall sensor in the motor end plate that is sensitive to changes in magnetic field.
| Connect |
The Hall sensor element pin 4 is voltage fed with B+ from the seat control module (357Dk) pin 29. The Hall sensor element is influenced by the magnetic ring, which changes polarity 2 times per revolution, the voltage from the Hall sensor pin 2 to the control module pin 31 is decisive in order to calculate the speed. The control module input interprets a voltage of 1.1 to 2.5 V as low and a voltage between 3.5 and 4.8 V as high.
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