Infiniti QX56 (Z62). Manual - part 733

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

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< REMOVAL AND INSTALLATION >

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REMOVAL AND INSTALLATION

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

Exploded View

INFOID:0000000006289684

Removal and Installation

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WARNING:

Be sure to read “General Precautions” when working on the fuel system. Refer to 

FL-2, "General Pre-

cautions"

.

REMOVAL

1.

Check fuel level on a level ground. If the fuel level is 7/8 of the fuel tank (full or nearly full), draw appropri-
ate amount of fuel from the fuel tank.

• In the event of malfunction in fuel pump, insert a hose measuring 20mm (0.79 in) in diameter into the

filler opening to draw approximately 20 liters fuel.

2.

Release the fuel pressure from the fuel lines. Refer to 

EC-153, "Work Procedure"

.

3.

Open fuel filler lid.

4.

Open filler cap and release the pressure inside fuel tank.

5.

Tilt the second seat toward the front of the vehicle.

6.

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

1.

Lock ring

2.

Fuel level sensor unit, fuel filter and 
fuel pump assembly

3.

O-ring

Refer to 

GI-4, "Components"

 for symbols in the figure.

JSBIA0298GB

Guideline

: Draw approximately 20 liters from a full-tank condition.

A

: Direction mark

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< REMOVAL AND INSTALLATION >

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

7.

Disconnect harness connector (1) and all the fuel tube.

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:

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

(F) are completely depressed. Never twist it more than
necessary.

• Never 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.

• Never bend or twist resin tube during installation and dis-

connection. 

• Never 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. 

2

: Fuel feed tube

3

: Quick connector

JSBIA0301ZZ

A

:  Pull

B

: Push in tabs

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B

: Connection (Cross-section)

D

: To under floor fuel line

E

: To fuel tank

G

: Disconnection

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FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

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• 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 lock ring for fuel level sensor unit, fuel filter and fuel
pump assembly with fuel tank lock ring wrench [SST:
KV10119800 (J-45722)] (A) by turning counterclockwise.

9.

Remove fuel level sensor unit, fuel filter and fuel pump assem-
bly.

CAUTION:

• Never bend float arm during removal.
• Avoid impacts such as falling when handling compo-

nents.

INSTALLATION

Note to the following, and install in the reverse order of removal.
• For installation, use a new O-ring.

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, check that the connection is secure by following method.
• Pull the tube and the connector to check they are securely

connected.

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

connector.

Inspection

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INSPECTION AFTER INSTALLATION

Use the following procedure to check for fuel leakage.

1.

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

2.

Start engine and let it idle and check there are no fuel leakage at the fuel system connections.

JPBIA0135ZZ

JSBIA0384ZZ

A

:  Pull

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< REMOVAL AND INSTALLATION >

FUEL TANK

FUEL TANK

Exploded View

INFOID:0000000006289687

Removal and Installation

INFOID:0000000006289688

WARNING:

Be sure to read “General Precautions” when working on the fuel system. Refer to 

FL-2, "General Pre-

cautions"

.

REMOVAL

CAUTION:

Perform work on level place.

1.

Check fuel level on a level ground. If the fuel level is 7/8 of the fuel tank (full or nearly full), draw appropri-
ate amount of fuel from the fuel tank.

• In the event of malfunction in fuel pump, insert a hose measuring 20mm (0.79 in) in diameter into the

filler opening to draw approximately 20 liters fuel.

2.

Perform steps 2 to 7 of “REMOVAL” in “ FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP
ASSEMBLY” on fuel level sensor unit, fuel filter and fuel pump assembly. Refer to 

FL-5, "Removal and

Installation"

.

1.

Fuel tank side protector

2.

Fuel tank side protector

3.

Fuel tank front protector

4.

Fuel tank protector

5.

Fuel tank mounting band

6.

Fuel tank

7.

Clamp

8.

Vent hose

9.

Vent hose

10. Fuel filler tube

11.

Grommet

12. Fuel filler cap

13. Fuel filler tube protector

14.

Clip

15. Clamp

16. Fuel filler hose

17.

Fuel filler tube

18. Fuel filler hose

19. Fuel filler tube protector

Refer to 

GI-4, "Components"

 for symbols in the figure.

JSBIA0381GB

Guideline

: Draw approximately 20 liters from a full-tank condition.