A method is provided for detecting a malfunction of a valve () of a braking device () for a processing machine, where the braking device () has a brake that can be actuated via the valve () and a transmission portion (). The method includes triggering (I.) the valve () of the braking device () and determining a state variable in the transmission portion (). The method further comprises a comparison (III.) of the determined state variable to a reference variable and a detection (IV.) of a malfunction of the valve () based on a result of the comparison.
