A method is provided for controlling an actuator that can be switched into an on state and an off state by means of pulse duration modulation, as well as to a control system. The inventive method includes, but is not limited to defining a standard pulse repetition period for the square wave signal for a range of a nominal pulse-duty factor, and increasing the pulse repetition period of the square wave signal referred to the standard pulse repetition period if a nominal pulse-duty factor falls short of a first lower threshold value and/or if a nominal pulse-duty factor exceeds a first upper threshold value.