Test point 7: Remedy:

Examine battery and alternator voltage.

Select Control module supply voltage  and Sensor supply voltage  in the Actual values  menu item, and check the values with the vehicle in reverse gear and the ignition switched on.

Displayed control module supply voltage approx. 12 V

Displayed sensor supply voltage approx. 8 V

Erase fault memory, move shift lever out of reverse gear and switch off ignition. Next, switch ignition back on, move shift lever into reverse and read out fault memory.

If the fault reappears and the display also shows that one or more sensors are faulty, replace the sensor or sensors.