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FL-2Revision: November 2009
PRECAUTIONS
2006 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EBS00RBP
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER ”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
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PREPARATIONFL-3
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PREPARATIONPFP:00002
Special Service ToolsEBS00M3O
The actual shapes of the Kent-Moore tools may differ from those of the special tools illustrated here.
Commercial Service ToolEBS00M3P
Tool number
(Kent-Moore No.)
Tool nameDescription
—
(J-46536)
Fuel tank lock ring tool Removing and installing fuel tank lock ring
LBIA0398E
Tool name
Description
Power tool Loosening bolts and nuts
PBIC0190E
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FL-4Revision: November 2009
FUEL SYSTEM
2006 QX56
FUEL SYSTEMPFP:17503
Checking Fuel LinesEBS00M3Q
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.
General PrecautionsEBS00M3R
WARNING:
When replacing fuel line parts, be sure to observe the following.
Put a “CAUTION: INFLAMMABLE” sign in the workshop.
Be sure to work in a well ventilated area and furnish workshop with a CO2 fire extinguisher.
Do not smoke while servicing fuel system. Keep open flames and sparks away from the work area.
CAUTION:
Before removing fuel line parts, carry out the following procedures:
–Put drained fuel in an explosion-proof container and put the lid on securely. Keep the container in
safe area.
–Release fuel pressure from the fuel lines. Refer to EC-80, "FUEL PRESSURE RELEASE" .
–Disconnect the battery negative terminal.
Always replace O-rings and clamps with new ones.
Do not kink or twist hoses when they are being installed.
Do not tighten hose clamps excessively to avoid damaging
hoses.
Tighten high-pressure rubber hose clamp so that clamp
end is 3 mm (0.12 in) from hose end.
Tightening torque specifications are the same for all rubber
hose clamps.
Check that the screw does not contact adjacent parts.
SMA803A
MMA104A
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FUEL SYSTEMFL-5
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After connecting the fuel tube quick connectors, make sure
the quick connectors are secure.
Ensure that the connector and resin tube do not contact
any adjacent parts.
After installing tubes, make sure there is no fuel leakage at
connections in the following steps.
–Apply fuel pressure to fuel lines with turning ignition switch
ON (with engine stopped). Then check for fuel leaks at con-
nections.
–Start the engine and rev it up and check for fuel leaks at
connections.
Use only a Genuine NISSAN fuel filler cap as a replacement.
If an incorrect fuel filler cap is used, the MIL may come on.
For servicing “Evaporative Emission System” parts, refer to
EC-32, "
EVAPORATIVE EMISSION SYSTEM" .
For servicing “On Board Refueling Vapor Recovery
(ORVR)” parts, refer to EC-39, "
ON BOARD REFUELING
VAPOR RECOVERY (ORVR)" .
PBIC1268E
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FL-6Revision: November 2009
FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
2006 QX56
FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLYPFP:17042
Removal and InstallationEBS00M3S
REMOVAL
WARNING:
Follow the “General Precautions” before working on the fuel system. Refer to FL-4, "
General Precau-
tions" .
1. Remove the fuel filler cap to release the pressure from inside the fuel tank.
2. Check the fuel level on level gauge. If the fuel gauge indicates more than the level as shown (full or almost full), drain the fuel
from the fuel tank until the fuel gauge indicates the level as
shown, or less.
If the fuel pump does not operate, use the following procedure
to drain the fuel to the specified level.
a. Insert a suitable hose of less than 15 mm (0.59 in) diameter into the fuel filler pipe through the fuel filler opening to drain the fuel
from fuel filler pipe.
b. Remove the LH rear wheel and tire. Refer to WT-7, "
Rotation" .
c. Remove the four clips and remove the rear fender protector, front.
1. Inspection hole cover 2. Inspection hole cover O-ring 3. Lock ring
4. Fuel level sensor, fuel filter, and fuel pump assembly 5. Fuel tank
6. Fuel level sensor, fuel filter, and fuel
pump assembly O-ring
LBIA0381E
WBIA0390E
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d. Disconnect the fuel filler hose from the fuel filler pipe.
e. Insert a suitable hose into the fuel tank through the fuel filler hose to drain the fuel from the fuel tank.
As a guide, the fuel level reaches the fuel gauge position as shown, or less, when approximately 14
liters (3 3/4 US gal, 3 1/8 Imp gal) of fuel are drained from the fuel tank.
3. Release the fuel pressure from the fuel lines. Refer to EC-80, "
FUEL PRESSURE RELEASE" .
4. Disconnect the battery negative terminal.
5. Remove the second row LH seat and the third row LH seat. Refer to SE-98, "
Second Row Outboard"
(second row), SE-105, "LH Side Seat" (third row).
6. Remove the second and third row rear seat belt buckles mounted on the floor. Refer to SB-3, "
SEAT
BELTS" .
7. Remove the LH center pillar trim, the LH rear trim panel, and the LH rear side door kick plate and weather stripping. Refer to EI-35, "
BODY SIDE TRIM" .
8. Remove the second row rear center console and base, if equipped. Refer to EI-37, "
FLOOR TRIM" .
9. Reposition the floor carpet out of the way to access the inspection hole cover, located under the center LH rear seat.
10. Remove the inspection hole cover by turning the retainers 90 °
degrees clockwise.
Remove the O-ring.
11. Disconnect the fuel level sensor, fuel filter, and fuel pump assembly electrical connector, the EVAP hose, and the fuel feed
hose.
LBIA0386E
LBIA0382E
LBIA0383E
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FL-8Revision: November 2009
FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
2006 QX56
Disconnect the quick connector as follows:
Hold the sides of the connector, push in tabs and pull out the
tube.
If the connector and the tube are stuck together, push and pull
several times until they start to move. Then disconnect them
by pulling.
CAUTION:
The quick connector can be disconnected when the tabs
are completely depressed. Do not twist the quick connec-
tor more than necessary.
Do not use any tools to disconnect the quick connector.
Keep the resin tube away from heat. Be especially careful
when welding near the tube.
Prevent any acid liquids such as battery electrolyte, from
getting on the resin tube.
Do not bend or twist the resin tube during connection.
Do not remove the remaining retainer on the hard tube (or
the equivalent) except when the resin tube or the retainer
is replaced.
When the resin tube or hard tube, or the equivalent, is
replaced, also replace the retainer with a new one (white
colored retainer).
To keep the quick connector clean and to avoid damage
and contamination from foreign materials, cover the
quick connector with plastic bags or suitable material as
shown.
SFE562A
PBIC1268E
PBIC0163E
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12. Remove the lock ring using Tool.
13. Remove the fuel level sensor, fuel filter, and fuel pump assem-
bly. Remove and discard the fuel level sensor, fuel filter, and fuel
pump assembly O-ring.
CAUTION:
Do not bend the float arm during removal.
Avoid impacts such as dropping when handling the com-
ponents.
INSTALLATION
Installation is in the reverse order of removal.
For installation, use a new fuel level sensor, fuel filter, and fuel pump assembly O-ring.
Connect the quick connector as follows:
–Check the connection for any damage or foreign materials.
–Align the connector with the pipe, then insert the connector straight into the pipe until a click is heard.
–After connecting the quick connector, make sure that the con-
nection is secure by checking as follows:
–Pull the tube and the connector to make sure they are securely
connected.
–Visually inspect the connector to make sure the two retainer tabs
are securely connected.
INSPECTION AFTER INSTALLATION
1. Turn the ignition switch ON but do not start engine, then check the fuel pipes and hose connections forleaks while applying fuel pressure to the system.
2. Start the engine and rev it above idle speed, then check that there are no fuel leaks at any of the fuel pipe and hose connections.Tool number : — (J-46536)
LBIA0389E
PBIC1653E