Range Rover (LM) V8-4.4L (2009)
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Fuel Pump Relay: Description and Operation
FUEL PUMP RELAY
The V8 engine has a returnless fuel system. The system pressure is maintained at a constant 4 bar (59 Psi), with no reference to intake manifold pressure.
The fuel is supplied to the injectors from a fuel pump fitted within the fuel tank. The electrical supply to this fuel pump is controlled by the ECM (engine
control module) via a relay and the RCM (restraints control module) which will turn the fuel off upon a vehicle impact. The fuel system is pressurized as
soon as the ECM (engine control module) is powered up, the pump is then switched off until engine start has been achieved.
