A method of assessing a pulse-width-modulated signal in which the pulse-width-modulated signal to be assessed is applied to a first input of a microcontroller and a signal, that depends on the pulse-width-modulated signal being assessed, is applied to a second input of the microcontroller for assessment. The pulse-width-modulated signal being assessed is applied to a voltage divider to produce the signal that depends on the same. For the pulse-width-modulated signal to be assessed and for the signal that depends on the same, in each case, the microcontroller determines a time interval between signal edges of the respective signal, and the signal is assessed on the basis of a difference between the time interval between the signal edges in the pulse-width-modulated signal to be assessed and the time interval between the signal edges in the signal that depends on the same.