This sensor is integrated in the housing of the rotary disc valve of the power steering gear. It detects the steering angle and calculates the steering angle rate. If the sensor fails, the steering function is nevertheless assured. The power steering switches over in this case to a programmed emergency running mode.
This sensor is also having a built in assembly named J500 control unit is integrated in the engine pump assembly. It converts the signals for driving the gear pump in line with the steering angle rate and the vehicle speed. The delivery required at a particular moment is obtained from a map stored in the control unit. The control unit detects and storesfaults which occur during operation. A restart protection and temperature protection are integrated in the control unit.