Fuel Pump Other

Courtesy of VOLVO CARS CORPORATION

THE FUEL PUMP CONSISTS OF:

1	Electric pump	8	Lifetime filter
2	Sensor for fuel level measurement	9	Flange
3	Level arm	10	Flow to the engine
4	Floats	11	Parking heater connection
5	Reservoir containing: Pre-filter, pump Umbrella valve, allows fuel into the reservoir. Ejector pump, continuously fills the reservoir with fuel. Non-return valve, opens at 10 kPa.	12	Connector.
6	Safety valve, opens at 700 ± 100 kPa.	13	Opening in the bottom of the reservoir to the umbrella valve and ejector pump.
7	Digital flow valve, opens at 300 ± 15 kPa and closes at 220 ± 15 kPa.

The fuel pump function is to ensure that the correct pressure and flow is retained at the fuel rail at the request of the engine control module (ECM).

The fuel pump are supplied electrically via the pump electronic module (PEM) with variable effect to be able to supply variable fuel pressure/flow and grounded in the bodywork via the pump electronic module (PEM).

The engine control module (ECM) can diagnose the fuel pump function for the correct pressure and electronic open circuit. The engine control module (ECM) can diagnose the pump electronic module (PEM). Also refer to: FUEL PRESSURE REGULATION, DIAGNOSTICS

The fuel pump can be activated and its status read off using the diagnostic tool.

The pressure in the fuel rail can be measured by connecting a manometer to a service nipple. This nipple is on the right-hand end of the fuel rail.