For further information regarding this component and the system it is a part of, refer to Brakes and Traction Control, Description and Operation

The sensors are active, which means that they have a built in electronic circuit. The control module transmits a voltage of U bat, the sensor sends back a digital power signal of 7 or 14 mA, depending on position. This solution gives a more robust signal, compared to the voltage signal. The current flow over the connections is higher which minimizes the chance of corrosion.