EPS CM receives torque and rotation speed of steering wheel from torque sensor.

The EPS CM uses a torque sensor as it's main input for determining the amount of steering assists. The input and output shafts are separated by a torsion bar, where the torque sensor is located. The sensor consists of a two detecting plates. Detecting plate 1 is fixed to the output shaft, detecting plate 2 is fixed to the input shaft. As torque is applied to the steering column shaft the alignment of the teeth between detecting plate 1 and 2 changes. The EPS CM recognizes this change.

The EPS CM sets this code if torque sensor can't calculate torque and rotation speed normally due to open or short in torque sensor circuit or discordance between 2 sensing element signal.

The EPS CM turns on warning lamp and stops assist control.