This function is used to check that the control for the clutch cylinder works and to check that the piston's movement between disengaged and engaged position.
At activation a ticking sound is heard from the clutch cylinder. The cylinder stroke's values are displayed at the end of the test. The current value must be between the minimum and maximum values.
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 in transmission between 550-1,000 kPa.
Battery voltage above 20 V.
Oil temperature in transmission above 15°C.
Procedure:
Select the function, press "OK".
A dialogue box shows test conditions.
Activate "Disengage / engage", a ticking sound should be heard and the sensor value for piston movement should change.
Press "OK", values for the cylinder's stroke are shown.
The function is done.
If the function fails, check the test conditions and repair any faults.