Patent ID: 8162799

Claim:
A method of monitoring either a hydraulic or a pneumatic transmission control system comprising a pressure supply unit with a supply line carrying a pressure medium under a supply pressure (p V ), and having an actuating member for a clutch control element of a friction clutch such that the actuating member has a pressure space that is connectable, via a clutch control valve, to the supply line, and in which the supply pressure (p V ) is determined by a pressure sensor that is connectable to the supply line by a control valve, the method comprising the steps of: determining the supply pressure (p V ) via the pressure sensor connected to the pressure space of the clutch control element by virtue of the fact that by briefly opening the clutch control valve, producing at least one of a pressure increase (Δp K ) and a pressure gradient (Δp K /Δt) of a control pressure (p K ) in the pressure space of the clutch control element, calculating the supply pressure (p V ) currently present from the control pressure (p K ), and determining at least one of the pressure increase (Δp K ) and the pressure gradient (Δp K /Δt) via the pressure sensor.