At deterioration of frictional overlays of a conducted disk coupling starts to revolve. It is shown by insufficient acceleration by sharp pressing an accelerator pedal, capacity loss at movement on lifting is thus felt, the fuel expense increases, the engine overheats. Periodically check coupling before a trip.

Coupling check spend as follows:

- Brake the car a lay brake and start up the engine;

- Press a coupling pedal, include 3rd transfer and try to get under way from a place;

- At serviceable coupling the engine will stop already at the first quarter of a course of a pedal of coupling at its return;

- If the engine continues to work, coupling means is worn out.