Steering Angle Sensor
WARNING: This page is about a different car, the 2021 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.
The Steering Angle Sensor (SAS) is installed at the lower side of the clock spring of a steering wheel. The SAS is used to determine turning direction and speed of the steering wheel. It sends CAN signals on the direction through CAN communication lines to the IBAU. Then, the IBAU uses them when performing ESP-related calculations including the steering speed and direction and controlling the anti-roll system.