A motor vehicle, in particular an electric or hybrid vehicle, with an electric energy source and a control device assigned to said source, is intended to improve the degree of effectiveness and to extend the service life of the electric energy source in a vehicle of this type. The medical device of the present invention comprises a passer having a proximal end and a distal end, the passer defining a channel between the proximal end and the distal end. An inputoutput device extends along at least a portion of the modular electronic rack system and includes a power input and a signal output electrically coupled thereto. A third signal path is provided from the second data processing core to a second pin of the integrated circuit for carrying the selected debug signal of the second data processing core to the second pin.