Infiniti G37 Coupe. Manual — part 710
FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
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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
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
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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
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
3.
Open fuel filler lid.
4.
Open filler cap and release the pressure inside fuel tank.
5.
Remove rear seat cushion. Refer to
.
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:
A
: Direction mark
b
: 90
°
: Vehicle front
Right side
: Main fuel level sensor unit, fuel filter
and fuel pump assembly
Left side
: Sub fuel level sensor unit
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: 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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• 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.
• 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:
• Never 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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: Fuel hose
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FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
• When installing fuel hose connector (1) insert them fully until a
click sound of full stopper engagement is heard.
Main and Sub Fuel Level Sensor Unit
• Face main and sub fuel level sensor units as shown in the figure,
and install them with the knock pin (C) 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, 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
2
: Fuel hose
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: Right side
B
: Left side
: Vehicle front
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: Align notches
: Vehicle front
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: Pull
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