Setting headlights to parked position

When terminal R is switched off, the headlights move to the parked position. The parked position is important for the headlights' next calibration sequence: from the parked position, the headlights are run through a calibration sequence in the pre-drive-check. During this calibration sequence, the AHL control unit learns the straight-ahead position for the headlights once again.

When the headlights have reached the parked position, the stepper motor controllers (SMCs) inform the AHL control unit ("acknowledge"). The AHL control unit deactivates the stepper motor controllers. The post-run time (= the time between "acknowledge" and "switch off") is approximately 10 seconds.