Operating principle

The steering angle indicates the angle position of the steering wheel. A steering angle of +/-180° is picked up. The signal from the steering angle sensor is repeated every 360°. The steering wheel turns are counted via these signal repetitions. The SZL is supplied permanently via terminal 30. This allows steering wheel movements to be detected even when the ignition is OFF. The neutral position of the steering wheel is retained after a power interruption. However, the steering wheel turn is lost. A calculation model re-determines the current steering wheel turn during driving. If this process has not been completed by the time a driving speed of 25 kph has been reached, the DSC warning light is set.

Further options for determining the steering wheel position after a power interruption:

• Steering from limit position to limit position.
• Performing service function "Steering angle sensor adjustment".