Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Control Module
- The steering wheel angle sensor module (SAS) is integrated in the steering wheel module (SWM).
- Contact reel
- Steering wheel angle sensor
The steering wheel angle sensor module (SAS) is integrated in the lever module together with the steering wheel module (SWM). The only function of the steering angle sensor module (SAS) is to process the signals from the steering wheel angle sensor. The signals are used by the brake system's DSTC function, among other things. The steering wheel angle sensor module (SAS) transmits signal information, via the high speed side of the controller area network (CAN). The signals are used by several systems, for example, the Brake control module (BCM) for the DSTC function, the Suspension module (SUM) for the Four-C function, etc.
Steering wheel angle sensor and Steering wheel angle sensor module (SAS) are located on the underside of the contact reel.
If a fault occurs, the steering wheel angle sensor module (SAS) detects this and a diagnostic trouble code (DTC) is stored. The DSTC function is switched off.
Stored diagnostic trouble codes (DTCs) are stored in the Steering wheel angle sensor module (SAS). The information can be read out via the data link connector in the vehicle.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.