Nissan Sentra. Manual — part 496
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< REMOVAL AND INSTALLATION >
FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
REMOVAL AND INSTALLATION
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
NOTE:
When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-
ing.
REMOVAL
1. Release the fuel pressure from the fuel lines. Refer to
.
1.
Lock ring
2.
Fuel level sensor, fuel filter and fuel
pump assembly
3.
O-ring
4.
Fuel tank
Front
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FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
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2. Check the fuel level with the vehicle on a level surface. If the fuel
gauge indicates more than the level as shown (1/2 full), drain
the fuel from the fuel tank until the fuel gauge indicates a level at
or below as shown (1/2 full).
• In case the fuel pump does not operate, use the following pro-
cedure.
a. Insert fuel tubing of less than 25 mm (0.98 in) diameter into the
fuel filler tube through the fuel filler opening to drain fuel from the
fuel filler tube.
b. Disconnect the fuel filler hose from the fuel filler tube.
c. Insert fuel tubing into the fuel tank through the fuel filler hose to
drain fuel from the fuel tank.
• As a guide, if the fuel tank is full the fuel level reaches or is less than the level on the fuel gauge as
shown, when approximately 25 (6-5/8 US gal, 5-1/2 Imp gal) of fuel is drained from a full fuel tank.
3. Open fuel filler lid.
4. Remove trunk floor carpet. Refer to
INT-43, "TRUNK SIDE FINISHER : Removal and Installation"
5. Open filler cap and release the pressure inside fuel tank.
6. Remove rear seat cushion assembly. Refer to
SE-23, "Removal and Installation - Seat Cushion Assem-
7. Remove inspection hole cover.
8. Disconnect harness connector (1), fuel feed hose (3) and quick
connector (4) from fuel level sensor unit, fuel filter and fuel pump
assembly (2).
• Remove quick connector in the following procedures.
- Pinch quick connector square-part (A) with your fingers, and
pull out the quick connector (1) by hand.
- If quick connector and tube on sender unit are stuck, push and
pull several times until they move, and pull out.
CAUTION:
• Quick connector can be removed when the tabs are com-
pletely depressed. Do not twist it more than necessary.
• 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.
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FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
• Do not bend or twist resin tube during installation and disconnection.
• To keep the connecting portion clean and to avoid dam-
age and foreign materials, cover them completely with
plastic bags (A) or something similar.
• Do not insert plug, preventing damage on O-ring in quick
connector.
9. Remove lock ring for fuel level sensor unit, fuel filter and fuel
pump assembly with Tool (A) by turning counterclockwise.
10. Remove fuel level sensor unit, fuel filter and fuel pump assembly
(1).
CAUTION:
• Do not bend float arm during removal.
• Place a cloth around the fuel level sensor, fuel fitler and
fuel pump assembly during removal to avoid spilling fuel
inside the vehicle.
• Do not cause impacts such by dropping when handling
components.
INSTALLATION
Installation is in the reverse order of removal.
1. Install the O-ring to the opening of the fuel tank.
CAUTION:
Do not reuse O-ring.
2. Insert the fuel level sensor unit, fuel filter and fuel pump assem-
bly to the fuel tank with its matching arrow aligned with fuel tank
matching arrow.
CAUTION:
• Do not bend float arm during installation.
NOTE:
• For fuel level sensor assembly matching mark is located on
the fuel tank to the rear side of the vehicle.
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Tool number (A)
: KV991J0090 (J-46214) (shown)
: KV101208S0 ( — )
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FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
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3. Install Lock ring with Tool (A) to tighten lock 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.
• Visually confirm that the two tabs are connected to the connector.
• Pull (A) the tube and the quick connector (1) to check they are
securely connected.
Inspection
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INSPECTION AFTER INSTALLATION
Use the following procedure to check for fuel leaks.
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 check there are no fuel leaks at the fuel system connections.
Tool number (A)
: KV991J0090 (J-46214) (shown)
: KV101208S0 ( — )
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