Abstract: A method for operating a drive device of a motor vehicle which has at least one electric machine with a phase angle detector and an output shaft operatively connectable with the electric machine, includes: when a return value of the phase angle detector of the electric machine is constant, performing a first diagnostic operating mode of the drive device, in which the operative connection between the electric machine and the output shaft is interrupted, subsequent, the electric machine is controlled by open lop control to a defined rotational speed, and when the return value continues to be constant after controlling the electric machine to the defined rotational speed, a first operating state of the phase angle detector is recognized and otherwise a correct function of the phase angle detector is recognized.

Abstract: The invention relates to a communication system for a motor vehicle for transmitting an information relating to the operation of the motor vehicle from a transmitting control device to a receiving control device. The communication system comprises an interface for the input or output of the information relating to the operation of the motor vehicle. Communication can be established via the interface by means of a protocol which comprises an operation field for identifying a task to be carried out using the information relating to the operation of the motor vehicle.

Abstract: A control system for a motor vehicle comprises an output control unit for outputting data related to the operation of the motor vehicle and an operation control unit spatially separated from the output control unit for generating or providing data related to the operation of the motor vehicle. The output control unit comprises a data storage for storing data related to the operation of the motor vehicle and the data related to the operation of the motor vehicle can be read out of the data storage and outputted by the output control unit.