The present invention aims at providing a debugging mechanism capable of detecting erroneous read access to a bus slave caused by a synchronization control infringement between bus masters due to a failure of software. The clutch unit includes at least one wet clutch device that is provided with a plurality of clutch elements, in particular clutch discs, that are at least partially wetted by a coolant such as oil. The method further includes, in the event that the verification agent is unable to invoke the verification platform API, starting an internal timer and performing local verification of the verification request at the given device. Preferably, the treatment liquid is an electrodeposition liquid.