Infiniti FX35 / FX45. Manual - part 709

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

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2.

Release the fuel pressure from the fuel lines. Refer to 

EC-87, "Fuel Pressure Check"

 (VQ35DE) or 

EC-

665, "Fuel Pressure Check"

 (VK45DE).

3.

Open fuel filler lid.

4.

Open filler cap and release the pressure inside fuel tank.

5.

Remove rear seat cushion. Refer to 

SE-95, "Removal and Installation"

.

6.

Peel off floor carpet, then remove inspection hole cover for main
and sub fuel level sensor units by turning clips clockwise by 90
degrees.

7.

Disconnect harness connector and fuel feed tube.

Disconnect quick connector as follows:

• Hold the sides of connector, push in tabs and pull out tube.
• If quick connector sticks to tube of main fuel level sensor unit,

push and pull quick connector several times until they start to
move.Then disconnect them by pulling.

CAUTION:

PBIC1576E

PBIC1577E

SFE562A

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FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

• Quick connector can be disconnected when the tabs are

completely depressed. Do not twist it more than neces-
sary.

• Do not use any tools to disconnected quick connector.
• Keep resin tube away from heat. Be especially careful

when welding near the resin tube.

• Prevent acid liquid such as battery electrolyte, etc. from

getting on resin tube.

• Do not bend or twist resin tube during installation and

disconnection. 

• Do not remove the remaining retainer on hard tube (or

the equivalent) except when resin tube or retainer is
replaced.

• When resin tube or hard tube (or the equivalent) is

replaced, also replace retainer with new one. 

• To keep the connecting portion clean and to avoid dam-

age and foreign materials, cover them completely with
plastic bags or something similar.      

8.

Remove main fuel level sensor unit, fuel filter and fuel pump assembly, and sub fuel level sensor unit as
follows:

CAUTION:

• Do not bend float arm during removal.
• Avoid impacts such as falling when handling components.

a.

Removal of main fuel level sensor unit, fuel filter and fuel pump assembly:

i.

Remove retainer.

ii.

Raise main fuel level sensor unit, fuel filter and fuel pump
assembly, and using snap ring pliers, remove fuel hose connec-
tor. 

CAUTION:

Be careful not to damage fuel hose connector by expanding
them excessively.

b.

Removal of sub fuel level sensor unit:

i.

Remove retainer.

ii.

Raise and release sub fuel level sensor unit to remove.

INSTALLATION

Note to the following, and install in the reverse order of removal.

Main and Sub Fuel Level Sensor Unit

Retainer color: White

SBIA0504E

PBIC0163E

PBIC1578E

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

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• When installing fuel hose connector insert them fully until a click

sound of full stopper engagement is heard.

• Face main and sub fuel level sensor units as shown in the figure,

and install them with the knock pin on back aligned with pin hole on
fuel tank.

• Install retainer so that its notch becomes parallel with the notch on

fuel tank.

• Tighten retainer mounting bolts evenly.

Quick Connector

Connect quick connector as follows:
1.

Check the connection for damage or any foreign materials.

2.

Align the connector with the tube, then insert the connector straight into the tube until a click sound is
heard.

3.

After connecting, make sure that the connection is secure by following method.
• Pull the tube and the connector to make sure they are securely

connected.

• Visually confirm that the two retainer tabs are connected to the

connector.

INSPECTION AFTER INSTALLATION

Use the following procedure to check for fuel leaks.

PBIC1579E

PBIC1065E

PBIC1652E

PBIC1653E

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FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

1.

Turn ignition switch “ON” (with engine stopped), then check connections for leaks by applying fuel pres-
sure to fuel piping.

2.

Start engine and let it idle and make sure there are no fuel leaks at the fuel system connections.

Component

INFOID:0000000001327108

Disassembly and Assembly

INFOID:0000000001327109

CAUTION:

Sub fuel level sensor unit cannot be disassembled and should be replaced as a unit.

DISASSEMBLY

Remove fuel level sensor unit as follows.

1.

Disconnect harness connector.
• Hold connector by fingers and pull it out, because there is no

stopper release tab.

2.

Using suitable tool, pull up tabs points as shown in the figure
(two points) to release the lock.

CAUTION:

Be careful not to damage it.

1.

Fuel level sensor unit 

2.

Fuel filter and fuel pump assembly

PBIC1081E

PBIC1078E

PBIC1654E