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Home >> BMW >> 2012 >> 335xi Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Engine Performance - Functional Description - E92 >> Engine Performance - Functional Description >> Electronic Control Of Fuel Pump >> Fuel system
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Fuel system

In the "electronic control of the fuel pump" system, the electronic fuel pump is activated in line with requirements. The DME control unit or DDE control unit calculates the volume of fuel required by the engine at each point in time. The total (fuel) volume required is transmitted as a message to the fuel pump control module (EKPS) via the CAN bus.

The fuel pump control module (EKPS) regulates the output of the electric fuel pump in such a way that the electric fuel pump delivers exactly the volume of fuel required. In conventional systems, the electric fuel pump is operated constantly at the maximum number of revolutions with the maximum available vehicle voltage. In each operating status, the maximum volume of fuel that could be required is available.

The "electronic control of the fuel pump" system optimizes the fuel supply and lowers fuel consumption. The "electronic control of the fuel pump" system is available for petrol and diesel engines.

NOTE: As of 07/2013 a new electric fuel pump may be delivered in installation mode. There is a service function in the diagnosis for removing the installation mode.
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