How It Works: Notes

The actuation of the switching motor is time-dependent. If the direction of adjustment has to be changed in order to execute a movement, current is first applied to the selector motor for approx. 900 milliseconds. After this, the switching motor is supplied with current in the direction required. As this happens, current remains applied to the switching motor for a further approx. 400 milliseconds (at room temperature). This ensures that the direction of adjustment is completely changed.

The timing of the current supply to the switching motor depends on the on-board supply voltage. A map is stored in the centre console switch cluster (SZM). The values for the map are time and on-board supply voltage. The switching procedure is actuated according to this map.

Two Hall sensors record the position of the tilt adjustment and of the height adjustment. 2 magnetic rings (16-pin) on the two drive shafts in the adjustment gears record the position in respective direction of adjustment.