Method and arrangement for controlling a motor vehicle

A method for controlling a motor vehicle having at least two component systems interconnected via a communication system for facilitating an exchange of data between the component systems, the motor vehicle further having a drive unit generating torque and a first one of said component systems being a first control unit for controlling the torque of said drive unit, a second one of said component systems being a second control unit for operating on said torque in at least one operating state, the method comprising the steps of:

• generating a desired torque value (mokupdes) in said second control unit indicative of the magnitude of the torque to be outputted by said drive unit;
• transmitting said desired torque value (mokupdes) from said second control unit via said communication system to said first control unit;
• forming an electrical output signal in said first control unit based on said desired torque value (mokupdes) to adjust said torque of said drive unit to correspond to said desired torque value (mokupdes);
• determining values (tlHFM, n) in said first control unit which correspond to at least one operating variable of said drive unit and said vehicle and computing from said values (tlHFM, n) an actual torque (mokupact) outputted by said drive unit;
• and,
• transmitting said computed actual value (mokupact) from said first control unit to said second control unit via said communication system.