Fuel Tank and Lines

Fuel Tank and Lines

Fuel Pump Module
The fuel pump module is attached to the base of the fuel tank by the bayonet fitting. The pump module flange has three electrical connectors; one for the fuel pump motor and one for each of the fuel level sensors. All are connected to the external electrical connector via the connectors on the underside of the fuel pump module flange.

The pump module has a maximum rated flow of 180 liters/hour (47.55 US gallons/hour) and an output pressure of 5.0 bar (72.5 lbf/sq.in).

The fuel pump is energised by the fuel pump relay which is located in the Battery Junction Box (BJB) and the fuel pump control module which is located in the left hand side of the luggage compartment. The relay and control module are controlled by the engine control module The relay is energised at all times when the ignition switch is in ignition position II.

A 60 micron fine mesh, pump inlet filter is attached to the pump inlet port at the bottom of the pump. The filter is located vertically at the side of the pump to ensure that a portion of the filter is off the base of the swirl pot to prevent premature blocking of the filter.

A second, serviceable fine mesh filter is located in-line. This provides additional filtration to the fuel before it is passed to the fuel rail. The filter has an electrical connection which is attached to ground to prevent electrostatic build-up.

The PRV, which is located in-line before the fuel filter, incorporates a non-return valve which prevents fuel returning to the pump when the engine is not running. This ensures that system pressure is maintained in the fuel feed line to the fuel rail when the engine is not running. It also incorporates an over pressure valve which relieves pressure at between 5.6 and 6.4 bar (81.2 to 92.8 lbf/sq.in) during 'hot-soak' conditions when the vehicle is switched off.