maintenance INFINITI QX56 2006 Factory Workshop Manual

ENGINE MAINTENANCEMA-19
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REMOVAL
1. Remove the ignition coil. Refer to EM-28, "IGNITION COIL" .
2. Remove the spark plug(s) using a suitable tool.
INSPECTION AFTER REMOVAL

Do not use a wire brush for cleaning.

If the spark plug tip is covered with carbon, a spark plug cleaner may be used.

Checking and adjusting the spark plug gap is not required
between change intervals.
INSTALLATION
Installation is in the reverse order of removal.

Use standard type spark plug for normal condition.

The hot type spark plug is suitable when fouling occurs with the standard type spark plug under conditions
such as:
–Frequent engine starts
–Low ambient temperatures

The cold type spark plug is suitable when spark knock occurs with the standard type spark plug under
conditions such as:
–Extended highway driving
–Frequent high engine revolution
SEM294A
SMA773C
Cleaner air pressure : Less than 588 kPa (5.9 bar, 6 kg/cm2 , 85 psi)
Cleaning time : Less than 20 seconds
SMA806CA

MA-20
ENGINE MAINTENANCE
Revision: November 20092006 QX56
CAUTION:
Do not drop or shock spark plug.
Checking EVAP Vapor LinesELS001PO
1. Visually inspect the EVAP vapor lines for improper attachment, cracks, damage, loose connections, chaf-
ing, or deterioration.
2. Inspect the vacuum relief valve of the fuel tank filler cap for clogging and sticking. Refer to EC-37, "
How to Detect Fuel Vapor Leakage" .
Make NGK
Model StandardFFV
Standard type DILFR5A-11DILFR5A-11D
Gap (Nominal) :1.1 mm (0.043 in)

CHASSIS AND BODY MAINTENANCEMA-21
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CHASSIS AND BODY MAINTENANCEPFP:00100
Changing In-cabin MicrofilterELS001PP
1. Remove the two lower glove box hinge pins to remove the glove
box from the instrument panel and let it hang from the cord.
2. Remove the screw and remove the in-cabin microfilter cover.
3. Remove the in-cabin microfilters from the front heater and cool- ing unit assembly housing.
4. Insert the first new in-cabin microfilter into the front heater and cooling unit assembly housing and slide it over to the right.
Insert the second new in-cabin microfilter into the front heater
and cooling unit assembly housing.
NOTE:
The in-cabin microfilters are marked with air flow arrows. The
end of the microfilter with the arrow should face the rear of the
vehicle. The arrows should point downward.
5. Install the in-cabin microfilter cover.
WLIA0027E
LJIA0134E
LJIA0148E
LJIA0134E

MA-22
CHASSIS AND BODY MAINTENANCE
Revision: November 20092006 QX56
6. Install the lower glove box in the instrument panel and secure it
with the two hinge pins.
Checking Exhaust SystemELS001BZ
Check exhaust pipes, muffler and mounting for improper attachment,
leaks, cracks, damage, loose connections, chafing or deterioration.
Checking Automatic Transmission Fluid (ATF)ELS001PQ
1. Remove the ATF level gauge bolt.
2. Before driving, the ATF level can be checked at ATF tempera-tures of 30 ° to 50 °C (86 ° to 122 °F) using the “COLD” range on
the ATF level gauge as follows:
a. Park the vehicle on a level surface and set the parking brake.
b. Start the engine and move the selector lever through each gear position. Shift the selector lever into the “P” position.
c. Check the ATF level with the engine idling.
d. Remove the ATF level gauge and wipe it clean with a lint-free paper.
CAUTION:
When wiping the ATF from the ATF level gauge, always use
a lint-free paper, not a cloth.
e. Re-insert the ATF level gauge into the charging pipe until the cap contacts the top of the charging pipe as shown.
CAUTION:
To check ATF level, insert the ATF level gauge until the cap
contacts the top of the charging pipe, with the gauge
reversed from the normal inserted position.
f. Remove the ATF level gauge and note the ATF level. If the ATF level is at low side of range, add ATF to the transmission
through the charging pipe.
CAUTION:
Do not overfill the transmission with ATF.
g. Install the ATF level gauge and the ATF level gauge bolt.
3. Warm up the engine.
4. Check for any ATF leaks.
5. Drive the vehicle to increase the ATF temperature to 80 ° C (176 ° F).
WLIA0027E
SMA211A
WLIA0014E
ATF level gauge bolt : Refer to AT- 2 5 0 , "Components" .
SCIA1684E

CHASSIS AND BODY MAINTENANCEMA-23
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6. Allow the ATF temperature to fall to approximately 65°C (149 °F). Use the CONSULT-II to monitor the ATF
temperature as follows:
NOTE:
ATF level will be greatly affected by temperature as shown. Therefore monitor the ATF temperature data
using the CONSULT-II.
a. Connect CONSULT-II to data link connector.
b. Select “MAIN SIGNALS ” in “DATA MONITOR ” mode for “A/T” with CONSULT-II.
c. Read out the value of “ATF TEMP 1”.
7. Re-check the ATF level at ATF temperatures of approximately 65°C (149 °F) using the “HOT ” range on the ATF level gauge as
shown.
CAUTION:

When wiping the ATF from the ATF level gauge, always
use lint-free paper, not a cloth.

To check the ATF level, insert the ATF level gauge until
the cap contacts the top of the charging pipe, with the
gauge reversed from the normal inserted position as
shown.
8. Check the ATF condition.

If the ATF is very dark or has some burned smell, there may be an internal problem with the transmis-
sion. Refer to AT- 4 2 , "
TROUBLE DIAGNOSIS" . Flush the transmission cooling system after repairing
the transmission.
SLIA0016E
WLIA0014E
SCIA1684E

MA-24
CHASSIS AND BODY MAINTENANCE
Revision: November 20092006 QX56

If the ATF contains frictional material (clutches, bands, etc.), replace the radiator and flush the transmis-
sion cooler lines using cleaning solvent and compressed air after repairing the transmission.
9. Install the ATF level gauge in the ATF charging pipe and install the level gauge bolt.
10. Tighten the level gauge bolt to specification.
Changing Automatic Transmission Fluid (ATF)ELS001PR
1. Drive the vehicle to warm up the ATF to 80 ° C (176 ° F).
2. Stop the engine.
3. Remove the ATF level gauge bolt.
4. Drain the ATF from the drain plug hole and then install the drain plug with a new gasket. Refill the transmission with new ATF.
Always refill with the same volume as the drained ATF. Use the
ATF level gauge to check the ATF level as shown. Add ATF as
necessary.

To flush out the old ATF from the coolers, pour new ATF into the charging pipe with the engine idling
and at the same time drain the old ATF from the auxiliary transmission oil cooler hose return line.

When the color of the ATF coming out of the auxiliary transmission oil cooler hose return line is about
the same as the color of the new ATF, flushing out the old ATF is complete. The amount of new trans-
mission ATF used for flushing should be 30% to 50% of the specified capacity.
CAUTION:

Use only the specified ATF. Do not mix with other fluids.

Using an ATF other than the specified ATF will cause deterioration in driveability and automatic
transmission durability, and may damage the automatic transmission, which is not covered by
the warranty.

When filling the transmission with ATF, do not spill the ATF on any heat generating parts such
as the exhaust manifold.

Do not reuse the drain plug gasket.
5. Install the ATF level gauge in the ATF charging pipe and tighten the level gauge bolt to specification.
6. Drive the vehicle to warm up the ATF to 80 ° C (176 ° F).
7. Check the ATF level and condition. Refer to MA-22, "
Checking Automatic Transmission Fluid (ATF)" . If
the ATF is still dirty, repeat steps 2 through 5.
Changing Transfer FluidELS001H0
DRAINING
1. Stop the engine. Level gauge bolt: : Refer to
AT- 2 5 0 , "
Components" .
Drain plug : Refer to AT- 2 5 0 , "
Components" .
WLIA0014E
ATF type and capacity : Refer to MA-11, "Fluids and Lubricants" .
Drain plug : Refer to AT- 2 5 0 , "
Components" .
Level gauge bolt : Refer to AT- 2 5 0 , "
Components" .

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2. Remove the drain plug and gasket to drain the transfer fluid as
shown.
3. Install the new gasket on the drain plug and install the drain plug in the transfer. Tighten the drain plug to specification.
CAUTION:
Do not reuse the gasket.
FILLING
1. Remove the filler plug and gasket.
2. Fill with new specified fluid until the fluid level reaches the spec-ified limit near the filler plug mounting hole as shown.
CAUTION:
Carefully fill the transfer with fluid. Filling should take
approximately three minutes.
3. Leave the vehicle for three minutes and then check the fluid level again as shown.
4. Install the new gasket on the filler plug and install the filler plug in the transfer. Tighten the filler plug to specification.
CAUTION:
Do not reuse the gasket.
Checking Transfer FluidELS001H1
FLUID LEAKAGE AND FLUID LEVEL
1. Check for any fluid leaks from the transfer assembly or around it and correct as necessary.
2. Remove the filler plug to check the fluid level at the filler plugmounting hole as shown.
CAUTION:
Do not start the engine while checking the fluid level.
3. Install the new gasket on the filler plug and install the filler plug in the transfer. Tighten the filler plug to specification.
CAUTION:
Do not reuse the gasket.
Checking Propeller ShaftELS001C5
Check the front and rear propeller shafts for damage, dents, and cracks. Check the joints for looseness and
any damage. Repair or replace as necessary.
Checking Final Drive OilELS001H3
1. Remove the filler plug. Drain plug : Refer to
TF-146, "
COMPONENTS" .
SMA444B
Fluid capacity and grade : Refer to MA-11, "Fluids
and Lubricants" .
Filler plug : Refer to TF-146, "
COMPONENTS" .
SMA439B
Filler plug : Refer to TF-146, "COMPONENTS" .
SMA439B

MA-26
CHASSIS AND BODY MAINTENANCE
Revision: November 20092006 QX56
2. Check the oil level as shown. Add the specified oil as necessary.
NOTE:
Rear final drive shown, front final drive similar
3. Install the filler plug and tighten to specification.
Changing Final Drive OilELS001C7
1. Remove the filler plug.
2. Remove the drain plug and drain the final drive oil.
3. Apply sealant to the drain plug threads.

Use High Performance Thread Sealant or equivalent. Refer to GI-46, "Recommended Chemical Prod-
ucts and Sealants" .
4. Install the drain plug and tighten to specification.
5. Refill the final drive with new specified oil.
6. Check the oil level.
NOTE:
Rear final drive shown, front final drive similar
7. Install the filler plug and tighten to specification.
Balancing WheelsELS001H4
REMOVAL
1. Using releasing agent, remove double-faced adhesive tape from the wheel. CAUTION:

Be careful not to scratch the wheel during removal.

After removing double-faced adhesive tape, wipe clean traces of releasing agent from the
wheel.
WHEEL BALANCE ADJUSTMENT

If a tire balance machine has adhesion balance weight mode settings and drive-in weight mode setting,
select and adjust a drive-in weight mode suitable for wheels.
1. Set wheel on wheel balancer using the center hole as a guide. Start the tire balance machine.
2. When inner and outer imbalance values are shown on the wheel balancer indicator, multiply outer imbal- ance value by 1.6 to determine balance weight that should be used. Select the outer balance weight withOil grade and viscosity : Refer to
MA-11, "
Fluids and
Lubricants" .
LLIA0068E
Filler plug : Refer to FFD-14, "COMPONENTS" (FFD), RFD-15, "COMPONENTS" (RFD).
Drain plug : Refer to FFD-14, "
COMPONENTS" (FFD), RFD-15, "COMPONENTS"
(RFD).
Oil grade and capacity : Refer to MA-11, "
Fluids and Lubricants" .
LLIA0068E
Filler plug : Refer to FFD-14, "COMPONENTS" (FFD), RFD-15, "COMPONENTS" (RFD).

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a value closest to the calculated value and install it to the designated outer position of, or at the desig-
nated angle in relation to the road wheel.
CAUTION:

Do not install the inner balance weight before installing the outer balance weight.

Before installing the balance weight, be sure to clean the mating surface of the wheel.
Indicated imbalance value × 5/3 = balance weight to be installed
Calculation example:
23 g (0.81 oz) × 5/3 = 38.33 g (1.35 oz) = 40 g (1.41 oz) balance
weight (closer to calculated balance weight value)
Note that balance weight value must be closer to the calculated
balance weight value.
Example:
37.4 g = 35 g (1.23 oz)
37.5 g = 40 g (1.41 oz)
a. Install balance weight in the position shown.
b. When installing balance weight to wheels, set it into the grooved area on the inner wall of the wheel as shown so that the balance
weight center is aligned with the wheel balancer indication posi-
tion (angle).
CAUTION:

Always use Genuine NISSAN adhesion balance weights.

Balance weights are not reusable; always replace with
new ones.

Do not install more than three sheets of balance weights.
c. If calculated balance weight value exceeds 50 g (1.76 oz), install two balance weight sheets in line with each other as shown.
CAUTION:
Do not install one balance weight sheet on top of another.
3. Start wheel balancer again.
4. Install drive-in balance weight on inner side of road wheel in the wheel balancer indication position (angle).
CAUTION:
Do not install more than two balance weights.
5. Start wheel balancer. Make sure that inner and outer residual imbalance values are 5 g (0.18 oz) each or below.
SMA054D
WDIA0060E
SMA056D

MA-28
CHASSIS AND BODY MAINTENANCE
Revision: November 20092006 QX56
Wheel Balance (Maximum Allowable Imbalance)

If either residual imbalance value exceeds 5 g (0.18 oz), repeat installation procedures.
Tire RotationELS001H5
1. Rotate the tires on each side from front to back as shown.
2. Adjust the tire pressure to specification. Refer to WT-38, "
Tire" .
3. After the tire rotation, retighten the wheel nuts after the vehicle has been driven for 1,000 km (600 miles), and also after a wheel
and tire have been installed such as after repairing a flat tire.
Checking Brake Fluid Level and LeaksELS001CA

Check the brake fluid level in the reservoir tank. It should be
between the “MAX ” and “MIN” lines on the reservoir tank.

If the fluid level is extremely low, check the brake system.

If the brake warning lamp comes on when the fluid is at the cor-
rect level, check the brake fluid level switch and the parking
brake switch.
Checking Brake Lines and CablesELS001CB
1. Check the brake lines and hoses for cracks, deterioration, and
other damage. Replace any damaged parts.
CAUTION:
If brake fluid leaks are visible around the brake line joints,
retighten the joint, or replace damaged parts as necessary.
2. Check for brake fluid leaks by fully depressing brake pedal while engine is running.
Checking Disc BrakeELS001CC
ROTOR
Check the rotor condition for wear or damage. Refer to BR-32,
"Front Disc Brake" , BR-33, "Rear Disc Brake" .
Maximum allowable imbalance Dynamic (At rim flange)
5 g (0.18 oz) (one side)
Static 10 g (0.35 oz)
Wheel nuts : Refer to WT-6, "WHEEL AND TIRE
ASSEMBLY" .
AMA159
WFIA0173E
SBR389C
SMA260A