Driving unit of a wiper device in a vehicle

A driving unit of a wiper device in a vehicle is provided with an electric drive motor which drives an output shaft which is coupled to a wiper rod, wherein on the outer surface of the output shaft, a wiper coupling section is arranged to be coupled to a linkage part of the wiper linkage. In addition to the wiper coupling portion a Prufkoppelabschnitt for connection to a test component to the output shaft is formed.