Measure the free travel of the clutch pedal (including the free travel at the pedal-pin joint).
Standard value: 4–13 mm.
If the clutch pedal free play does not correspond to the standard value, there is probably air in the clutch hydraulic drive or the clutch itself is faulty. Therefore, it is necessary to bleed the air from the clutch hydraulic drive or check the clutch itself.
(Information copied from the website mitsubishiman.ru)