Infiniti G35 (V35) Sedan. Manual - part 708

FL-4

< ON-VEHICLE MAINTENANCE >

FUEL SYSTEM

ON-VEHICLE MAINTENANCE

FUEL SYSTEM

Inspection

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Inspect fuel lines, fuel filler cap and fuel tank for improper attach-
ment, leaks, cracks, damage, loose connections, chafing or deterio-
ration.
If necessary, repair or replace damaged parts.

Quick Connector

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CAUTION:

• After connecting fuel tube quick connectors, make sure quick

connectors are secure.
Ensure that connector and resin tube do not contact any adja-
cent parts.

A

: Engine

B

: Fuel line

C

:  Fuel  tank

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1

: Quick connector

2

:  Retainer

A

: Hard tube (or the equivalent)

B

: Connection (cross-section)

C

: Resin tube

D

: To under floor fuel line

E

: To fuel tank

F

:  Tab

G

: Disconnection

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FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

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< ON-VEHICLE REPAIR >

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ON-VEHICLE REPAIR

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

Exploded View

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Removal and Installation

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WARNING:

Read “General Precautions” when working on the fuel system. Refer to 

GI-26, "General Precautions"

.

REMOVAL

1.

Check fuel level on fuel gauge. If fuel gauge indicates more than
the level as shown in the figure (full or almost full), drain fuel
from fuel tank until fuel gauge indicates level as shown in the fig-
ure or below.
NOTE:
Because fuel will be spilled when removing main and sub fuel
level sensor units for the top of the fuel is above the main and
sub fuel level sensor units installation surface. 
• As a guide, fuel level becomes the position as shown in the

figure or below when approximately 20   (5-1/4 US gal, 4-3/8
Imp gal) of fuel are drained from fuel tank. 

• In a case that fuel pump does not operate, perform the follow-

ing procedure.

1.

Retainer

2.

Main fuel level sensor unit, fuel filter 
and fuel pump assembly

3.

O-ring

4.

Sub fuel level sensor unit

A.

Right side

B.

Left side

Refer to 

GI-4, "Components"

 for symbol marks in the figure.

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< ON-VEHICLE REPAIR >

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

a.

Insert hose of less than 25 mm (0.98 in) in diameter into fuel filler tube through fuel filler opening to draw
fuel from fuel filler tube.

b.

Disconnect fuel filler hose from fuel filler tube. Refer to 

FL-10, "Exploded View"

.

c.

Insert fuel tube into fuel tank through fuel filler hose to draw fuel from fuel tank.

2.

Release the fuel pressure from the fuel lines. Refer to 

EC-543, "Inspection"

.

3.

Open fuel filler lid.

4.

Open filler cap and release the pressure inside fuel tank.

5.

Remove rear seat cushion. Refer to 

SE-104, "Exploded View"

.

6.

Peel off floor carpet, then remove inspection hole cover (1) units
by turning clips (2) clockwise by 90 degrees.

7.

Disconnect harness connector (3) and fuel feed tube (2).

Disconnect quick connector as follows:

• Hold the sides of connector, push in tabs and pull out fuel feed

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:

Right side

: Main fuel level sensor unit, fuel filter 
and fuel pump assembly

Left side

: Sub fuel level sensor unit

A

: Direction mark

b

:  90

°

: Vehicle front

1

: Quick connector

: Vehicle front

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A

:  Pull

B

: Push in tabs

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FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

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< ON-VEHICLE REPAIR >

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• Quick connector (1) can be disconnected when the tabs

(F) are completely depressed. Do not twist it more than
necessary.

• Do not use any tools to disconnected quick connector.
• Keep resin tube (C) 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 dis-

connection. 

• Do not remove the remaining retainer (2) on hard tube (or

the equivalent) (A) 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 (A) 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 (A), remove fuel hose con-
nector (1). 

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.

Fuel hose

B

: Connection (Cross-section)

D

: To under floor fuel line

E

: To fuel tank

G

: Disconnection

Retainer color: Green

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2

: Fuel hose

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