INFINITI QX56 2008 Factory Service Manual

CHASSIS AND BODY MAINTENANCEMA-23
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6. Install the lower glove box in the instrument panel and secure it
with the two hinge pins.
Checking Exhaust SystemINFOID:0000000001606180
Check exhaust pipes, muffler and mounting for improper attachment,
leaks, cracks, damage, loose connec tions, chafing or deterioration.
Checking Automatic Transmission Fluid (ATF)INFOID:0000000001606181
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 shift selector through each gear position. Move the shift selector 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 tr ansmission 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.
WLIA0027E
SMA211A
WLIA0014E
ATF level gauge bolt : Refer to TM-220, "Component" .
SCIA1684E
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MA-24
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CHASSIS AND BODY MAINTENANCE
5. Drive the vehicle to increase the ATF temperature to 80° C (176 ° F).
6. Allow the ATF temperature to fall to approximately 65 °C (149° F). Use the CONSULT-III 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-III.
a. Connect CONSULT-III to data link connector.
b. Select “MAIN SIGNALS” in “DATA MONI TOR” mode for “A/T” with CONSULT-III.
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 ch arging 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 TM-178, "
Checking the A/T Fluid (ATF)". Flush the transmission cooling system after
repairing the transmission.
• 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.
SLIA0016E
WLIA0014E
SCIA1684E
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10. Tighten the level gauge bolt to specification.
Changing Automatic Transmission Fluid (ATF)INFOID:0000000001606182
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 aux iliary 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 speci fied ATF will cause deterioration in driveability and automatic
transmission durability, and may damage the au tomatic 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 TM-178, "
Checking the A/T Fluid (ATF)". If the ATF is still
dirty, repeat steps 2 through 5.
Changing Transfer FluidINFOID:0000000001606183
DRAINING
1. Stop the engine. Level gauge bolt: : Refer to
TM-220, "
Component" .
Drain plug : Refer to TM-220, "
Component" .
WLIA0014E
ATF type and capacity : Refer to MA-12, "Fluids and Lubricants" .
Drain plug : Refer to TM-220, "
Component" .
Level gauge bolt : Refer to TM-220, "
Component".
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CHASSIS AND BODY MAINTENANCE
2. Remove the drain plug and gasket to drain the transfer fluid asshown.
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 wi th 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 FluidINFOID:0000000001606184
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 wh ile 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 ShaftINFOID:0000000001606185
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 OilINFOID:0000000001606186
1. Remove the filler plug. Drain plug : Refer to
TM-220, "
Component".
SMA444B
Fluid capacity and grade : Refer to MA-12, "Fluids
and Lubricants" .
Filler plug : Refer to TM-220, "
Component" .
SMA439B
Filler plug : Refer to TM-220, "Component" .
SMA439B
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2. Check the oil level as shown. A
dd 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 OilINFOID:0000000001606187
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-15, "
Recommended Chemical Prod-
ucts and Sealants" .
4. Install the drain plug and tighten to specification.
5. Refill the rear 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.
AdjustmentINFOID:0000000006059786
BALANCING WHEELS (ADH ESIVE WEIGHT TYPE)
Preparation Before Adjustment
Remove inner and outer balance weights from the r oad wheel using releasing agent, remove double-faced
adhesive tape from the road wheel.
CAUTION:
• Be careful not scratch the road wheel during removal. Oil grade and viscosity : Refer to
MA-12, "
Fluids and
Lubricants" .
LLIA0068E
Filler plug : Refer to DLN-214, "Disassembly and Assembly" (FFD), DLN-251, "Disassem-
bly and Assembly" (RFD).
Drain plug : Refer to DLN-214, "
Disassembly and Assembly" (FFD), DLN-251, "Dis-
assembly and Assembly" (RFD).
Oil grade and capacity : Refer to MA-12, "
Fluids and Lubricants" .
LLIA0068E
Filler plug : Refer to DLN-214, "Disassembly and Assembly" (FFD), DLN-251, "Disassem-
bly and Assembly" (RFD).
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CHASSIS AND BODY MAINTENANCE
• After removing double-faced adhesive tape, wipe clean traces of releasing agent from the roadwheel.
Wheel Balance Adjustment
• If a balancer machine has an adhesive weight mode se tting, select the adhesive weight mode setting and
skip Step 2. below. If a balancer machine only has the clip-on (rim flange) weight mode setting, follow Step 2.
to calculate the correct size adhesive weight.
1. Set road wheel on balancer machine using the center hole as a guide. Start the balancer machine.
2. For tire balance machines that only have a clip-on (rim flange) weight mode setting, follow this step to cal- culate the correct size adhesive weight to use. When inner and outer imbalance values are shown on the
balancer machine indicator, multiply outer imbalance value by 5/3 (1.67) to determine balance weight that
should be used. Select the outer balance weight with a value closest to the calculated value above and
install in to the designated outer position of, or at the designated angle in relation to the road wheel.
a. Indicated imbalance value × 5/3 (1.67) = balance weight to be
installed.
Calculation example:
23 g (0.81 oz) × 5/3 (1.67) = 38.33 g (1.35 oz) ⇒ 40 g (1.41 oz)
balance weight (closer to calculated balance weight value)
NOTE:
Note that balance weight value must be closer to the calculated
balance weight value.
Example:
37.4 ⇒ 35 g (1.23 oz)
37.5 ⇒ 40 g (1.41 oz)
3. Install balance weight in the position shown. CAUTION:
• Do not install the inner bala nce weight before installing
the outer balance weight.
• Before installing the balance weight, be sure to clean the mating surface of the road wheel.
• When installing balance weight (1) to road wheel, set it into the
grooved area (A) on the inner wall of the road wheel as shown
so that the balance weight center (B) is aligned with the bal-
ancer machine indication position (angle) (C).
CAUTION:
• Always use genuine NISSAN adhesive balance weights.
• Balance weights are non-reusable; always replace withnew ones.
• Do not install more than three sheets of balance weight.
4. 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 another.
5. Start balancer machine again.
6. Install balance weight on inner side of road wheel in the bal- ancer machine indication position (angle).
CAUTION:
Do not install more than two balance weights.
SMA054D
JPEIC0040ZZ
PEIA0033E
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7. Start balancer machine. Make sure that inner and outer residual imbalance values are 5 g (0.17 oz) each
or below.
8. If either residual imbalance value exceeds 5 g (0.17 oz), repeat installation procedures.
TIRE ROTATION
• Follow the maintenance schedule for tire rotation service intervals.
Refer to MA-6, "
General Maintenance".
• When installing the wheel, tighten wheel nuts to the specified
torque.
CAUTION:
• When installing wheels, tighte n them diagonally by dividing
the work two to three times in order to prevent the wheels
from developing any distortion.
• Be careful not to tighten wh eel nut at torque exceeding the
criteria for preventing strain of disc rotor.
• Use NISSAN genuine wheel nuts for aluminum wheels.
Tire RotationINFOID:0000000001606189
1. Rotate the tires on each side from front to back as shown.
2. Adjust the tire pressure to specification. Refer to WT-51, "
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 Flui d Level and LeaksINFOID:0000000001606190
• Check the brake fluid level in the reservoir tank. It should be
between the “MAX” and “MIN” li nes 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 correct
level, check the brake fluid level switch and the parking brake
switch.
Wheel balance Dynamic (At flange) Static (At flange)
Maximum allowable un-
balance Refer to WT-46, "
Adjustment".
Wheel nut tightening
torque: 133 N·m (14 kg-m, 98 ft-lb)
SMA829C
Wheel nuts : Refer to
WT-48 .
AMA159
WFIA0173E
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CHASSIS AND BODY MAINTENANCE
CheckingBrake Line and Cables
INFOID:0000000001606191
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 BrakeINFOID:0000000001606192
ROTOR
Check the rotor condition for wear or damage. Refer to BR-7, "DISC
ROTOR : Inspection" , BR-9, "DISC ROTOR : Inspection" .
CALIPER
Check the caliper for any l eaks, repair as necessary.
PA D
Check the pads for wear or damage. Refer to BR-7, "BRAKE PAD :
Inspection" , BR-9, "BRAKE PAD : Inspection" .
Checking Steering Gear and LinkageINFOID:0000000001606193
STEERING GEAR
SBR389C
SMA260A
SMA922A
LMA051
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• Check the steering gear housing for looseness, damage and oil
leakage as shown.
• Check the steering column connections for looseness.
STEERING LINKAGE
• Check the ball joint, dust cover and other component parts for looseness, wear, damage, and grease leak-
age.
Checking Power Steering Fluid and LineINFOID:0000000001606194
CHECKING FLUID LEVEL
• Check the power steering fluid level with the engine off.
• Check fluid level on reservoir. Use “HOT” range at fluid tempera- tures of 50 ° to 80° C (122° to 176° F). Use “COLD” range at fluid
temperatures of 0 ° to 30° C (32° to 86° F).
CAUTION:
• Do not overfill.
• Refer to MA-12, "
Fluids and Lubricants" .
CHECKING LINES
• Check lines for improper attachment, leaks, cracks, damage, loose
connections, chafing, and deterioration.
Checking Axle and Suspension PartsINFOID:0000000001606195
FRONT AND REAR AXLE AND SUSPENSION PARTS
Check front and rear axle and suspension parts for excessive play, cracks, wear or other damage.
• Shake each wheel to check for excessive play.
• Rotate each wheel to check for abnormal noise.
SGIA0506E
LGIA0021E
SGIA0506E
SMA525A
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MA-32
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CHASSIS AND BODY MAINTENANCE
• Check the axle and suspension nuts and bolts for looseness.
• Check the strut and shock absorber for oil leakage or other damage.
• Check the suspension ball joints for grease leakage and ball joint dust cover for cracks or other damage.
DRIVE SHAFT
Check the boots and drive shaft for cracks, wear, damage, and
grease leakage.
SFA901
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