Test Point 7

Test point 7
Send/receive pulse

Fault code 7

This fault is stored in the memory in the following cases:
1. Low vehicle voltage.
2. If there is a short circuit in the supply leads.
3. Faulty sensor or faulty control module.

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 approx. 12 V
supply voltage

Displayed sensor approx. 8 V
supply voltage

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.