Steering Wheel Rotation Sensor

The steering wheel rotation sensor (on vehicles equipped with HPAS  ) measures the rate of rotation of the steering wheel by monitoring a slotted-wheel as it passes through the sensor gap. The rotation sensor uses 2 signal lines to transmit information to the ABS module about whether the steering wheel is being turned left or right and how far it is being turned. The rotation sensor does not indicate the position of the steering wheel relative to straight-ahead.

On vehicles equipped with EPAS  , the steering angle and rotation information is transmitted to the ABS module over the HS-CAN  bus from the PSCM  .