The steering angle sensor transmits information concerning the steering angle, rotational direction and steering angle velocity on the CAN bus system. Calibration must be performed if:
The steering angle sensor has been replaced.
The ABS control unit has been replaced.
The vehicle front settings have been changed.
To ensure calibration is successful, the conditions set out in point 4 must be fulfilled.
Test conditions:
Ignition on, engine off.
Battery voltage above 12 V.
Steering wheel straight when wheels point straight ahead.
Procedure:
Check that the steering wheel is straight and the front wheels point straight ahead.
Select the "Steering angle calibration" function and press "OK".
A dialogue box shows: "Turn the steering wheel approximately 30° right or left, then back to the back to the centre position". Press "OK" to continue.
The calibration conditions are checked. If the conditions are fulfilled, 111 is displayed. If a zero is displayed, this means that one of the calibration conditions has not been fulfilled.
First figure from left = Within permitted steering angle tolerance range (less than 7.5°).
Second figure from left = Vehicle speed less than 1 km/h i.e. vehicle stationary.
Third figure from left = Chassis number correctly received.
When all the conditions are fulfilled, press "OK" to calibrate the steering angle sensor.
If calibration is successful, the display shows:
"Steering angle sensor adaptation correct".
"Steering angle CAN signal 0.0°".
Press "OK" to exit the function.
If calibration fails, check the test conditions and the conditions set out in point 4.