Learning of active rear axle steering

This function is used to calibrate the rear axle steering.
The calibration must be done in the following cases:
Test conditions:
Procedure:
  1. Position the wheels straight ahead, by using the measuring equipment.
  2. Start the engine.
  3. Start the function.
  4. A dialogue box shows test conditions, check these and press "OK".
  5. The calibration is initiated.
  6. In the next step, check the angle of the rear axle.
  7. If the value is out of range (+/-1°) control the angle of the rear axle by using the buttons.
  8. If the value is within the allowed range (+/-1°), proceed and calibrate the zero position.
  9. Set the zero position on the steerable rear axle.
  10. The values are permanently saved in the next dialogue box.
  11. The function is done.