Fuel Pump (USA/Can)

Courtesy of VOLVO CARS CORPORATION

THE FUEL PUMP CONSISTS OF:

1	Electric pump	10	Lifetime filter
2	Sensor for fuel level measurement	11	First filler valve (catflap type)
3	Level arm	12	Connector.
4	Floats	13	Breather port
5	Sock filter	14	Flange
6	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.	15	Parking heater connection
7	Safety valve, opens at 700 ± 100 kPa.	16	Flow to the engine
8	Digital flow valve, opens at 300 ± 15 kPa and closes at 220 ± 15 kPa.	17	Closed port
9	Low Pressure Relief Valve, opens at 20 kPa and closes at 50 kPa.	18	Bi-flow

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.