Fuel is supplied by a fuel pump located in the measuring and receiving unit (MSU) of the fuel tank. Power is supplied to the pump from the CDI control unit via the fuel booster pump relay (K40/9kb). The amount of fuel supplied to the high-pressure fuel pump (M41) is regulated by the valve (Y94), which is also controlled by the CDI control unit.
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Control of fuel supply to the injection pump (Mercedes-Benz Vito W639)
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