Manual steering-column adjustment

The driver is able to adjust the steering column with a switch. When the switch is operated, the signal is transmitted cyclically from terminal 30 (cycle time: 100 milliseconds). The steering-column adjustment is actuated for as long as the signal is being received.

Once the switch is no longer actuated, the message "Stop" is transmitted 3 times.

The steering-column adjustment is stopped when this signal is received, or if the cyclic message is not received twice.

To enable a failure of the steering column switch cluster to be detected, a further a cyclic message is transmitted when the data bus is active (cycle time: 1 second).

When changing the direction of adjustment, the center console switch cluster first actuates the switching motor.

The actuation of this motor is time-dependent. The adjustment motor is not actuated until the direction of adjustment is correctly set. The total adjustment movement is no more than 36 millimeters for tilt adjustment and 40 millimeters for reach adjustment.