System for operating an internal combustion engine, especially an internal combustion engine of an automobile

An electrical storage medium including a read-only-memory, for a control apparatus of an internal combustion engine including an engine of a motor vehicle, the electrical storage medium comprising:

• a program stored thereon which can, when executed on a computing apparatus including on a microprocessor, execute the method for operating a fuel supply system of an internal combustion engine including an engine of a motor vehicle, the method including the steps of:
• pumping fuel into a storage space with the aid of a pump and generating a pressure in the storage space;
• measuring an actual value of the pressure with the aid of a pressure sensor;
• controlling the pressure in the storage space (open loop and/or closed loop);
• detecting a fault in the fuel supply system via a plausibility control;
• initiating a diagnostic cycle of the engine when detecting a fault in the fuel supply system;
• and, activating diagnostic functions which check the individual components of the fuel supply system as to operability thereby determining the component which causes the fault and displaying the same.