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Qashqai J11. Fuel system (HRA2DDT, K9K, MR20DD) - part 2

FUEL SYSTEM

FL-17

< PERIODIC MAINTENANCE >

[MR20DD]

PERIODIC MAINTENANCE

FUEL SYSTEM

Inspection

INFOID:0000000010683783

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

INFOID:0000000010683784

CAUTION:

• After connecting fuel tube quick connectors, make sure quick connectors are secure.
• Ensure that connector and resin tube do not contact any adjacent parts.

: Engine

: Fuel line

: Fuel tank

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< REMOVAL AND INSTALLATION >

[MR20DD]

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

INFOID:0000000010714502

REMOVAL

CAUTION:

Never remove or disassemble parts unless instructed as shown in the figure.

DISASSEMBLY

Lock ring

Sub fuel level sensor assembly

O-ring

Fuel tank

Fuel level sensor unit, fuel filter and fuel pump
assembly

: Vehicle front

Tightening must be done following the Installation procedure. Refer to

FL-19, "Removal and Installation"

: Always replace after every disassembly.

JPBIA6876GB

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

FL-19

< REMOVAL AND INSTALLATION >

[MR20DD]

Removal and Installation

INFOID:0000000010769779

REMOVAL

Fuel Level Sensor Unit

WARNING:

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

FL-43, "General

Precautions"

Release the fuel pressure from the fuel lines. Refer to

ECK-153, "Work Procedure"

Check fuel level on a level ground. If the fuel level is at 1/2 or higher, drain enough fuel so that the level on
the fuel gauge is at half or below.
• This is to prevent overflow of fuel from the tank when the fuel level sensor unit, fuel filter and fuel pump

assembly is removed

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

into fuel filler tube through fuel filler opening to draw fuel from filler tube.

- Disconnect fuel filler hose from fuel filler tube. Refer to

FL-10, "Exploded View"

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

Disconnect batterie cable from negative terminal.

Open fuel filler lid and filler cap to release the pressure inside fuel tank.

Remove rear seat. Refer to

SE-35, "Removal and Installation"

Remove inspection hole cover.
• Using a screwdriver, remove it by turning clips clockwise by 90 degrees.

Disconnect harness connector (3) and quick connectors (4).

Fuel filter and fuel pump assembly

Fuel level sensor unit

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Guideline

: Draw approximately 32 liters (7 Imp gal) from a full-tank con-
dition.

: Fuel feed tube

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

: Vehicule front

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FL-20

< REMOVAL AND INSTALLATION >

[MR20DD]

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

• Remove quick connector in the following procedures.
- NOTE:

• The figure show the process of quick connector disconnection. Parts arround quick connector could

have a different shape compare to the figure.

- Hold the sides of quick connector, press tabs and pull out fuel

feed tube.

- If quick connector sticks to tube of main fuel level sensor unit,

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

CAUTION:

• Quick connector can be disconnected when the tabs are

depressed completely. Never twist it more than neces-
sary.

• Never 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.

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

connection.

• Never insert plug, preventing damage to O–ring in quick

connector.

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

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

Using lock ring wrench [SST: KV99104700], remove lock ring.
NOTE:
For reference when installing, put a matching mark on lock ring,
fuel level sensor unit and fuel tank.

: Push in tabs

: Pull

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: Connection (cross-section)

: Disconnection (cross-section)

: Quick connector

: Hard tube

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PBIC0240E

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

FL-21

< REMOVAL AND INSTALLATION >

[MR20DD]

Raise fuel level sensor unit.

CAUTION:

• Never bend float arm during removal.
• Never pollute the residual fuel inside of the tank. Draw out

avoiding inclination by supporting with a cloth.

• Never cause impacts such by dropping when handling

components.

10. Separate fuel tube as per the following steps to remove fuel level sensor unit.

• Pinch quick connector (A) square-part with your fingers, and

pull out the quick connector by hand.

• If quick connector and tube on sender unit are stuck, push

several times until they move, and pull out.
NOTE:
When separating the fuel tube, tie a diesel-resistance rope to
the tip of the fuel tube and leave the rope on the fuel tank side
to easily pull the fuel tube for installation.

• Disconnect harness connector (A).

Sub Fuel Level Sensor Assembly

Remove fuel level sensor unit, fuel filter and fuel pump assembly.

Use lock ring wrench [SST: KV99104700] to remove lock ring.

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PBIC0240E

FL-22

< REMOVAL AND INSTALLATION >

[MR20DD]

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

Remove sub fuel level sensor assembly (1).

CAUTION:

• Never disassemble a fuel tube (2) from sub fuel sensor

assembly.

• Never bend float arm during removal.
• Never pollute the residual fuel inside of the tank. Draw out

avoiding inclination by supporting with a cloth.

• Never cause impacts such by dropping when handling

components.

NOTE:
Tie a gasoline-resistance rope to a tip of the tube. Draw and
leave the rope to the fuel tank side so that the rope can be the
guide for installation.

INSTALLATION

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

Sub Fuel Level Sensor Assembly

Install O-ring to fuel tank without any twist.

Using the rope left on the fuel tank side at removal, run the fuel tube inside the fuel tank to install the sub
fuel level sensor assembly to the fuel tank.

CAUTION:

• Never bend float arm during installation.
• To install, fuel tube (1) must run to the front (

) of the vehicle to avoid the interference with the

float arm (2), as shown in the figure.

Install sub fuel level sensor assembly with its matching mark (A)
aligned with fuel tank matching mark (B) as shown in the figure.

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FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

FL-23

< REMOVAL AND INSTALLATION >

[MR20DD]

Use lock ring wrench [SST: 99104700] to install lock ring as per
the following steps.

Align the “ ” mark located on the rim of the lock ring (1) with the
“MAX” position of the fuel tank. Press the locking ring horizon-
tally to prevent the lock ring from tilting.
NOTE:
• Figure shows fuel level sensor unit, fuel filter and fuel pump

assembly side of fuel tank.

• For sub fuel level sensor assembly matching mark is located

on the fuel tank of the vehicle front side.

After aligning the “ ” mark with “MAX” turn the lock ring counter-
clockwise until the lock ring thread engages with the tank.
Turn the lock ring roughly 540

until the “ ” mark is between

"MIN" and "MAX" position.

Check that the “ ” mark of the lock ring (1) is between MIN and
MAX [i.e. within (A)].
NOTE:
• Figure shows fuel level sensor unit, fuel filter and fuel pump

assembly side of fuel tank.

• For sub fuel level sensor assembly matching mark is located

on the fuel tank of the vehicle front side.

Fuel Level Sensor Unit

Temporarily install the O-ring to the fuel level sensor unit.

CAUTION:

Do not reuse O-ring.

Connect the fuel tube as per the following steps.
• Insert the quick connector (A) straight to the fuel level sensor

unit.

• Judge a good fit from connecting sound and tactile feedback.
• Pull the fuel tube by hand to check a secure fit.

PBIC0240E

Tightening angle

: Approximately 540

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< REMOVAL AND INSTALLATION >

[MR20DD]

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

Connect harness connector (A).

Insert the fuel level sensor unit to the fuel tank, and then install the temporarily installed O-ring (Step 1) to
the opening of the fuel tank.

CAUTION:

• Never bend float arm during installation.
• To install, fuel tube (1) must run to the front (

) of the vehicle to avoid the interference with the

float arm (2), as shown in the figure.

Install fuel level sensor unit with its matching mark (A) aligned
with fuel tank matching mark (B) as shown in the figure.

Use lock ring wrench [SST: KV99104700] to install lock ring as
per the following steps.

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JPBIA6879ZZ

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PBIC0240E

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY

FL-25

< REMOVAL AND INSTALLATION >

[MR20DD]

Align the “ ” mark located on the rim of the lock ring (1) with the
“MAX” position of the fuel tank. Press the locking ring horizon-
tally to prevent the lock ring from tilting.

After aligning the “ ” mark with “MAX” turn the lock ring counter-
clockwise until the lock ring thread engages with the tank.
Turn the lock ring roughly 540

until the “ ” mark is between

"MIN" and "MAX" position.

Check that the “ ” mark of the lock ring (1) is between MIN and MAX [i.e. within (A)].

Connect quick connector of fuel feed tube as per following procedures.

Check the connection for damage or any foreign materials.

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

After connecting, check that the connection is secured with following procedures.
• Visually confirm that the two tabs are connected to the connector.
• Pull (A) the tube and the connector to check that they are

securely connected.

Connect harness connector.

Inspection Hole Cover

• Before installing inspection hole cover, check that the connecting part has no fuel leakage.
1.

Install inspection hole covers with the front mark (arrow) facing front of vehicle.

Lock clips by turning counterclockwise.

INSPECTION AFTER INSTALLATION

Check that there is no fuel leakage at connections in the following steps.
• Start engine and rev it up and check that there is no fuel leakage at connections.

Inspection

INFOID:0000000010714505

INSPECTION AFTER INSTALLATION

Use the following procedure to check for fuel leakage.

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

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

Tightening angle

: Approximately 540

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FL-26

< REMOVAL AND INSTALLATION >

[MR20DD]

FUEL TANK

FUEL TANK

Exploded View

INFOID:0000000010714506

Removal and Installation

INFOID:0000000010714507

REMOVAL

WARNING:

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

FL-15, "General Pre-

cautions"

Perform the steps 1 to 7 of “REMOVAL” in “ FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL
PUMP ASSEMBLY”. Refer to

FL-19, "Removal and Installation"

Drain fuel from fuel tank if necessary. Refer to

FL-19, "Removal and Installation"

CAUTION:

• Fuel tank will become unstable whilst removing. Fuel should be drained from tank prior to

removal to reduce this effect.

• Situate vehicle on a flat and solid surface.

Remove main muffler. Refer to

EX-11, "Exploded View"

Fuel tank band (RH)

Fuel tank band (LH)

Protector

Fuel tank

Clamp

Vent hose

Clamp

Fuel filler hose

Fuel filler tube

Grommet

Fuel filler cap

: N·m (kg-m, ft-lb)

: N·m (kg-m, in-lb)

JPBIA6889GB

FUEL TANK

FL-27

< REMOVAL AND INSTALLATION >

[MR20DD]

Remove rear propeller shaft. Refer to

DLN-186, "Removal and Installation"

. (4WD models)

Remove protector from fuel tank.

Disconnect vent hose

, EVAP tube

, and fuel filler hose

at rear side of fuel tank.

• Instruction for quick connector

of EVAP tube.

CAUTION:

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

are depressed completely. Never twist it more than nec-
essary.

• Never 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.

• Never bend or twist resin tube during installation and

disconnection.

• Never insert plug, preventing damage to O–ring in quick

connector.

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

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

: Vehicle front

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E1BIA1192ZZ

: Connection (cross-section)

: Disconnection (cross-section)

: Quick connector

: Hard tube

E1BIA1190ZZ

FL-28

< REMOVAL AND INSTALLATION >

[MR20DD]

FUEL TANK

Support the lower part of fuel tank

with transmission jack (A).

CAUTION:

Support the position that fuel tank mounting bands nev-
erengage.

Remove fuel tank band (RH and LH).

Lower transmission jack carefully to remove fuel tank while holding it by hand.

CAUTION:

Fuel tank may be in an unstable condition because of the shape of fuel tank bottom. Never rely on
jack too much. Be sure to hold tank securely.

INSTALLATION

Note the following, and install in the reverse order of removal.
• Surely clamp fuel hoses and insert hose to the length below.

• Be sure hose clamp is not placed on swelled area of fuel tube.
• Tighten fuel filler hose clamp.

• To connect quick connector, refer to

FL-19, "Removal and Installation"

Inspection

INFOID:0000000010714508

INSPECTION AFTER INSTALLATION

Use the following procedure to check for fuel leakage.

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

Start engine and rev it up and check that there is no fuel leakage at the fuel system tube and hose con-
nections.

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Fuel filler hose

: 35 mm (1.38 in)

The other hoses

: 25 mm (0.98 in)

Remaining length of screw thread

Specified torque

Fuel filler tube side

: 7 - 11 mm (0.28 - 0.43 in)

: 2.5 N·m (0.26 kg-m, 22 in-lb)

Fuel tank side

: 5 - 9 mm (0.20 - 0.35 in)

: 2.5 N·m (0.26 kg-m, 22 in-lb)

SERVICE DATA AND SPECIFICATIONS (SDS)

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< SERVICE DATA AND SPECIFICATIONS (SDS)

[MR20DD]

SERVICE DATA AND SPECIFICATIONS (SDS)

Fuel Tank

INFOID:0000000010683791

Standard and Limit

Fuel tank capacity

Approximate 65 (14-1/4 Imp gal)

Fuel recommendation

Refer to

GI-35, "Fuel"

FL-30

< PRECAUTION >

[K9K]

PRECAUTIONS

PRECAUTION

PRECAUTIONS

General Precautions

INFOID:0000000010418992

WARNING:

When replacing fuel line parts, be sure to observe the following.
• Put a “CAUTION: FLAMMABLE” sign in the workshop.
• Be sure to work in a well ventilated area and furnish workshop with a CO

fire extinguisher.

• Never smoke while servicing fuel system. Keep open flames and sparks away from the work area.

CAUTION:

• Use diesel fuel required by the regulations for cetane number. Refer to

EM-263, "Precaution for Die-

sel Equipment"

• Before removing fuel line parts, perform the following procedures:
- Put drained fuel in an explosion-proof container and put the lid on securely. Keep the container in

safe area.

- Disconnect the battery cable from the negative terminal.
• Always replace O-ring and clamps with new ones.
• Never kink or twist tubes when they are being installed.
• Never tighten hose clamps excessively to avoid damaging hoses.
• After installing tubes, check that there is no fuel leakage at connections in the following steps.
- Start engine and rev it up and check for fuel leakage at connections.
• Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the

“MI” may come on.

• Drain water from fuel filter, when the fuel filter warning lamp

turns ON (with fuel filter warning). Refer to

FL-34, "Water

Draining"

PBIC2664E