Steering Angle Sensor Module

The Steering Angle Sensor Module (SASM) is integrated into the clockspring on the steering column and is able to measure steering wheel rotation from lock to lock.

Steering angle sensor signals are processed in the clockspring to calculate the steering wheel angle and the steering wheel angle speed. These values, together with signal integrity information, are transmitted on the High Speed (HS) Controller Area Network (CAN) chassis bus for use by the Anti-lock Brake System (ABS) control module and functions such as Dynamic Stability Control (DSC).

If a fault occurs within the steering angle sensor module, a Diagnostic Trouble Code (DTC) is stored in the SASM and the ABS control module. The ABS control module signals the Instrument Cluster (IC) on the HS CAN chassis bus to illuminate the appropriate warning indicators, depending on the brake functions affected. A warning chime sounds to alert the driver to the fault condition. If the fault affects the Hill Descent Control (HDC) function a message is displayed in the message center in the IC.