Jaguar XJ (X350). Service manual — part 1105

1

—

Inertia fuel shutoff (IFS) switch

2

—

Fuel filter

3

—

Right-hand side fuel pump module

4

—

Fuel tank

5

—

Fuel tank filler pipe

6

—

Left-hand side fuel pump module

Item

Part Number

Description

Vehicles without supercharger

Item

Part Number

Description

1

—

Inertia fuel shutoff (IFS) switch

2

—

Fuel filter

3

—

Fuel pump module

4

—

Fuel tank

www.

5

—

Fuel tank filler pipe

6

—

Fuel transfer pump

The electronic returnless fuel system utilized has the following advantages:

reduced fuel tank vapor generation

requires less electrical power

does not require a fuel return line

The intelligence of this system is contained within the Engine control module (ECM).

The ECM determines the required fuel flow and communicates this information to the rear electronic

module (REM). The REM has the fuel pump driver functions fully integrated into the microprocessor.

The fuel pump relay is activated by the ECM power relay and provides a fused power supply to the

REM. The ECM and the REM calculate the frequency and determine the current required by the fuel

pump to maintain the correct fuel pressure at the fuel injectors.

The fuel tank is of a saddle design which incorporates a pump/sender unit in both sides of the tank

on vehicles with superchargers. On vehicles without superchargers, the right-hand side houses the

fuel pump module and the left-hand side houses the fuel transfer pump. The fuel pump cross over

lines are internal to the fuel tank to reduce potential leak paths.

Fuel is supplied at high pressure to the injectors via a fuel rail which incorporates a fuel pressure and

a fuel temperature sensor. The ECM increases the fuel pressure to minimize fuel vapor formation to

maintain fuel flow across the injectors. An inertia type fuel shutoff switch will cut power to the fuel

pump in the event of an accident.

Fuel System - VIN Range: G45704-
>G99999

Vehicles without Diesel engine

Item

Part Number

Description

1

—

Inertia fuel shut-off (IFS) switch

2

—

Fuel filter

www.