P47.20-2189-01
M3 Fuel pump
Location
The fuel pump is integrated in the fuel tank.
Task
The fuel pump provides a sufficient quantity of fuel to the high-pressure pump and at the required pressure.
Design
The fuel pump is a two-stage flow pump.
A fuel strainer is installed at the bottom as a coarse filter for the fuel pump feed.
Function
The fuel pump is actuated via the fuel pump relay (N10/2kA) by the CDI control unit (N3/9).
It draws the fuel from the fuel feed module through a fuel strainer. The fuel pump then pumps the suctioned fuel via the fuel filter on to the high-pressure pump.