Rotor position sensor

WARNING: This page does not describe the selected car, but rather 45 other vehicles, including the 2016 BMW M5, 2016 BMW 550i xDrive, 2016 BMW 550i, 2016 BMW 535i xDrive, and 2016 BMW 535i. However, it is still accessible from the selected car via links, so may be relevant.

New: The steering angle sensor in the steering column switch cluster (SZL) has been discontinued.

The steering wheel angle is now determined via the rotor position sensor of the electromechanical power steering (EPS). The rotor position sensor is integrated in the EPS control unit. The EPS supplies the non-linearised values for the steering angle. The ICM calculates the steering wheel angle.

There are 2 rotor position sensors (redundancy) on the printed circuit board of the control unit. Both sensors use the principle of the Hall effect (Hall sensor with magnet wheel). The magnet wheel is attached to the shaft of the servomotor.

Fig 1: Identifying EPS Control Unit, Servomotor And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Item	Explanation
1	EPS control unit
2	6-pin plug connection (steering momentum sensor)
3	Plug connection 2-pin (voltage supply)
4	six-pin plug connection
5	Servomotor

Communication with the DSC (on FlexRay) and EPS (on PT-CAN) takes place via the central gateway module (ZGM). Depending on vehicle: Communication via Front Electronic Module (FEM).