Depending on the engine coding variant, the instrument cluster can determine the fuel consumption directly by means of the fuel consumption signal tKVA or receive it from the engine control unit via the CAN bus.
The fuel consumption signal tKVA is derived from the injection signal supplied by the engine control unit. By linking it with the position signal, it corresponds to the consumption per unit of distance (e.g. l/100 km).
The fuel consumption signal tKVA is not only used for calculating the fuel consumption but also for controlling and therefore indicating the service interval display.