A method for determining a correction factor for a hydraulic control value

A method for determining a correction factor for a hydraulic drive value (x, x.1) of a motor vehicle drive train component, wherein the drive train has an electric machine (1) and a hydraulic system comprising at least a first oil pump (2.1) for the pressure supply of the hydraulic system, the first oil pump (2.1) with the electric machine (1) is mechanically drive operatively connected, wherein the electrical machine (1) is operated in a first operating range in such a way at a standstill of the motor vehicle, that the hydraulic system known by the first oil pump (2.1) with a pressure level is supplied, wherein (1) and the output (G2) of the drive train is produced during operation of the electrical machine (1) in the first operating range a frictional connection between the electrical machine, so that the electric machine (1) experiences a torque load, whose value is stored wherein, after storing the torque value, the electric Masch ine (1) is operated in a second operating range with respect to the first operating range a reduced speed, wherein either the first oil pump (2.1) or a second oil pump (2.2), which can be driven by a separate electric machine (3), the supply pressure of the hydraulic system accepts, said to adjusting the second operating region torque (1t, 1t.2) of the electrical machine (1) with the previously stored torque value is compared and the result of this comparison as a correction factor in the hydraulic drive value (x, x.1) received ,