4 wheel speed sensors: Notes

The active wheel speed sensors are connected to the DSC control unit. The complete signal processing takes place in the active wheel speed sensors.

The active wheel speed sensors also detect the direction of travel.

Fig 1: Wheel Speed Sensors And Swivel Bearing

Courtesy of BMW OF NORTH AMERICA, INC.

The wheel speed is measured at a magnetic increment wheel. The magnetic increment wheel is divided into 96 increments per rotation of the wheel. Each increment change is detected by the active wheel speed sensor and converted into a defined signal protocol of a pulse-width modulated signal.