Position sensor, length adjustment, access, electrically operated seat (357e)
| Position sensor, length adjustment, access, electrically operated seat (357e) |
| Main task |
To give information that is necessary for the seat control module to be able to calculate the lengthways position of the seat.
| Type |
The position sensor (pulse sensor) for the seat is a Hall sensor integrated in the motor for the lengthways seat position. 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 (357k) 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 33 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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