Functional Description - Steering Angle Sensor

Depending on the vehicle, the Steering Angle Sensor (SAS) can be mounted on the Steering Column, or incorporated into the Steering Column Control Module (SCCM) or Steering Gear. The SAS signal is broadcast on the CAN bus. The SAS signal is used by several modules to monitor the Steering Wheel position and rate of change for vehicle stability control, Engine Stop/Start enabling and autonomous operations.

The PCM rationalizes the Wheel Speed Sensor signals against each other and uses the Wheel Speed Sensor signals to rationalize the Steering Angle Sensor signal.

• If the steering angle input is high (wheel turned) when the vehicle comes to a stop, and the vehicle is equipped with Electric Power Steering, the PCM will disable ESS mode. The Electric Power Steering can draw Battery voltage down quickly if the wheel is turned significantly and the engine is turned off.