2006 INFINITI QX56 check engine

DIFFERENTIAL GEAR OILFFD-7
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Revision: November 2009 2006 QX56
DIFFERENTIAL GEAR OILPFP:KLD30
Changing Differential Gear OilEDS00451
DRAINING
1. Stop the engine.
2. Remove the drain plug from the front final drive assembly to drain the differential gear oil.
3. Install the drain plug with sealant applied on the threads to the front final drive assembly. Tighten to the
specified torque. Refer to FFD-14, "
COMPONENTS" .

Use High Performance Thread Sealant or equivalent. Refer to GI-46, "Recommended Chemical Prod-
ucts and Sealants" .
FILLING
1. Remove the filler plug from the front final drive assembly.
2. Fill the front final drive assembly with new differential gear oil
until the level reaches the specified level near the filler plug hole.
3. Install the filler plug with sealant applied on the threads to the front final drive assembly. Tighten to the specified torque. Refer
to FFD-14, "
COMPONENTS" .

Use High Performance Thread Sealant or equivalent. Refer to
GI-46, "
Recommended Chemical Products and Sealants" .
Checking Differential Gear OilEDS00452
DIFFERENTIAL GEAR OIL LEAKAGE AND LEVEL
1. Make sure that differential gear oil is not leaking from the front final drive assembly or around it.
2. Check the differential gear oil level from the filler plug hole as
shown.
CAUTION:
Do not start engine while checking differential gear oil level.
3. Install the filler plug with sealant applied on the threads to the front final drive assembly. Tighten to the specified torque. Refer
to FFD-14, "
COMPONENTS" .

Use High Performance Thread Sealant or equivalent. Refer to
GI-46, "
Recommended Chemical Products and Sealants" .
Differential gear oil
grade and capacity
: Refer to
MA-11, "
Fluids
and Lubricants" .
LDIA0176E
LDIA0176E

FL-1
FUEL SYSTEM
B ENGINE
CONTENTS
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SECTION
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Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 2
PREPARATION ...................................................... ..... 3
Special Service Tools .......................................... ..... 3
Commercial Service Tool .................................... ..... 3
FUEL SYSTEM ........................................................... 4 Checking Fuel Lines ................................................. 4
General Precautions ........................................... ..... 4
FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY ......................................
..... 6
Removal and Installation ..................................... ..... 6
REMOVAL ........................................................ ..... 6
INSTALLATION ................................................ ..... 9
INSPECTION AFTER INSTALLATION ............. ..... 9
FUEL TANK ........................................................... ... 10
Removal and Installation ..................................... ... 10
REMOVAL ........................................................ ... 11
INSTALLATION ................................................ ... 14
INSPECTION AFTER INSTALLATION ............. ... 14
SERVICE DATA AND SPECIFICATIONS (SDS) ... ... 15
Standard and Limit ............................................... ... 15

FUEL SYSTEMFL-5
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Revision: November 2009 2006 QX56

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

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLYFL-9
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Revision: November 2009 2006 QX56
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

FL-14Revision: November 2009
FUEL TANK
2006 QX56
22. If necessary, remove the lock ring using Tool.
23. If necessary, remove the fuel level sensor, fuel filter, and fuelpump assembly. 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 pipe and hose connections forleaks while applying fuel pressure.
2. Start the engine and rev it above idle, then check that there are no fuel leaks at any of the fuel pipe and hose connections.Tool number : — (J-46536)
LBIA0389E
PBIC1653E

FSU-2
PRECAUTIONS
Revision: November 20092006 QX56
PRECAUTIONSPFP:00001
PrecautionsEES00253

When installing the rubber bushings, the final tightening must be done under unladen condition and with
the tires on level ground. Oil will shorten the life of the rubber bushings, so wipe off any spilled oil immedi-
ately.

Unladen condition means the fuel tank, engine coolant and lubricants are at the full specification. The
spare tire, jack, hand tools, and mats are in their designated positions.

After installing suspension components, check the wheel alignment.

Lock nuts are not reusable. Always use new lock nuts for installation. New lock nuts are pre-oiled, do not
apply any additional lubrication.

FSU-8
ON-VEHICLE SERVICE
Revision: November 20092006 QX56
1. Bounce the front of vehicle up and down to stabilize the vehicle height (posture).
2. Push the vehicle straight ahead about 5 m (16 ft).
3. Put a mark on base line of the tread (rear side) of both front tires
at the same height as hub center as shown. These marks are
measuring points.
4. Measure the distance “A” on the rear side of the front tires as shown.
5. Push the vehicle slowly ahead to rotate the wheels 180 °
degrees (1/2 a turn).
CAUTION:
If the wheels have rotated more than 180 ° degrees (1/2
turn), start this procedure again from the beginning. Never
push the vehicle backward.
6. Measure the distance “B” on the front side of the front tires at the same marks as shown. Total toe-in is calculated as “A” – “B”.
7. Adjust the toe-in by varying the length of the steering outer socket.
a. Loosen the outer tie-rod lock nuts.
b. Adjust the toe-in by screwing the outer tie-rods in or out.
c. Tighten the outer tie-rod lock nuts to specification.
FRONT WHEEL TURNING ANGLE
NOTE:
Check front wheel turning angle after the toe-in inspection.
1. Place front wheels on turning radius gauges in straight ahead position and rear wheels on stands so that vehicle can be level.
Check the maximum inner and outer wheel turning angles for LH
and RH road wheels.
2. Start engine and run at idle, turn steering wheel all the way right and left, measure the turning angle.

Any turning angles are not adjustable. If any of steering
angles are out of the specification, check if the following parts
are worn or damaged.
–Steering gear
–Steering column
–Front suspension components
AFA050
Total toe-in : Refer to FSU-19, "Wheel Alignment
(Unladen*1 )*6" .
SFA234AC
Standard length “L” : Refer to PS-26, "Steering Outer
Socket and Inner Socket" .
Lock nut : Refer to PS-15, "
Removal and
Installation" .SGIA0167E
Wheel turning angle
(full turn) : Refer to
FSU-19, "Wheel
Alignment (Unladen*1 )*6" .
SFA439BA

FSU-12
STABILIZER BAR
Revision: November 20092006 QX56
STABILIZER BARPFP:54611
Removal and InstallationEES0025C
REMOVAL
1. Remove engine under cover using power tool.
2. Remove stabilizer bar mounting bracket bolts and connecting
rod nuts using power tool, as shown.
3. Remove bushings from stabilizer bar.
INSPECTION AFTER REMOVAL

Check stabilizer bar for twist and deformation. Replace if necessary.

Check rubber bushing for cracks, wear and deterioration. Replace if necessary.
INSTALLATION
Installation is in the reverse order of removal.

Tighten all nuts and bolts to specification. Refer to FSU-5, "Components" .
LEIA0094E