This function is used to check that the control for the clutch cylinder works and to check the piston's movement between disengaged and engaged position.
At activation a ticking sound is heard from the clutch cylinder. At the end of the test, values are shown for the cylinder's stroke, current value shall be within the min./max. value.
Possible air malfunctions:
Leaking drain plug.
Malfunction of air supply to cylinder.
Dirt/oil in air channels.
Binding piston in cylinder.
Binding solenoid valve.
Leak in air connections.
Test conditions:
Parking brake applied.
Air pressure above 6 bar.
Gearshifting operation disengaged.
Battery voltage above 20V.
Oil temperature in transmission above 10 °C.
Procedure:
Select function, press "OK".
A dialogue box with test conditions is shown.
Activate "Disengage / engage", a ticking sound should be heard and the sensor value for the piston movement should change.
Press "OK", values for the cylinder's stroke are shown.
The function is complete.
If the function fails, check the test conditions and repair
any faults.