P0568

P056800

Diagnostic information - DME control unit

Switch for cruise control system

The control unit must be active in order to test internal function sequences and diagnosable inputs/outputs.
In the event of a fault, check whether the fault is permanently >present<. To perform the check, erase the fault memory, meet the diagnostic conditions and read out the fault memory again.

NOTE:
- No function, cruise control/ACC

Diagnostic conditions
- Plausibility fault for cruise control switch
- Vehicle speed > 30 km/h (19 mph)

Possible fault causes
- Signal implausible