Setting a system pressure for a hydraulically actuated clutch comprises
a) Providing a system comprising a pump drivable by an electrically operated motor controlled by a control unit that senses a motor current and rotational speed and a system temperature is determined;
b) a characteristic diagram is provided specifying values for at least the motor current and rotational speed for different system operating points;
c) Accessing the characteristic diagram while operating a vehicle;
d) Sensing at least the motor current and rotational speed at at least a first operating point and determining the system temperature ;
e) Comparing the values, acquired in step d) for the current and speed with the values for the current and rotational speed from the characteristic diagram according to step b);
f) Adapting the characteristic diagram for the system on the basis of the parameters determined in step d).