2008 INFINITI QX56 weight

REFRIGERATION SYSTEMHA-21
< ON-VEHICLE MAINTENANCE >
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1. Shut-off valve 2. A/C service valve3. Recovery/recycling equipment
4. Refrigerant container (HFC-134a) 5. Weight scale (J-39650) 6. Evacuating vacuum pump (J-39699)
7. Manifold gauge set (J-39183)
*1 HA-22, "
Maintenance of Oil Quantity
in Compressor"
*3HAC-113, "Performance Chart"*5 HA-4, "Contaminated Refrigerant"
*2HAC-109, "Component Function
Check"
*4HAC-110, "Diagnostic Work Flow"
WJIA1923E
Revision: March 2010 2008 QX56

LU-16
< DISASSEMBLY AND ASSEMBLY >
OIL PUMP
2. Measure the inner diameter of oil pump body to brazed portion(position 6) using suitable tool.
3. Calculate the clearance using the following formula. • (Clearance) = (Inner diameter of oil pump body) - (Outer diameter of inner rotor)
Regulator Valve Clearance
Check regulator valve to oil pump cover clearance using the following formula.
• (Clearance) = D
1 (Valve hole diameter) - D2 (Outer Diameter of
valve)
CAUTION:
• Coat regulator valve with engine oil.
• Check that it falls smoothly into the regulator valve hole by its own weight.
ASSEMBLY
Installation is in the reverse order of removal.
NOTE:
Install the inner rotor and outer rotor with the punched marks on the
oil pump cover side.
PBIC0142E
Inner rotor to brazed portion of housing
clearance
: 0.045 - 0.091 mm (0.0018 - 0.0036 in)
Regulator valve to oil pump cover
: 0.040 - 0.097 mm (0.0016 - 0.0038 in)
PBIC0143E
PBIC0144E
Revision: March 2010 2008 QX56

CHASSIS AND BODY MAINTENANCEMA-27
< ON-VEHICLE MAINTENANCE >
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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).
Revision: March 2010 2008 QX56

MA-28
< ON-VEHICLE MAINTENANCE >
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
Revision: March 2010 2008 QX56

SCS-22
< COMPONENT DIAGNOSIS >
HEIGHT SENSOR SIGNAL CIRCUIT
HEIGHT SENSOR SIGNAL CIRCUIT
DescriptionINFOID:0000000001731990
Supplies vehicle height input to the suspension control unit.
Component Function CheckINFOID:0000000001731991
1.CHECK HEIGHT SENSOR OPERATION
CONSULT-III
1. Select "HEIGT SEN" of AIR LEVELIZER data monitor test item.
2. While monitoring test item, add or take away weight from the rear of the vehi cle. Check that the voltage
value changes with vehicle height.
Is the HEIGHT SEN data monitor responding normally?
YES >> Height sensor is operating normally.
NO >> Refer to SCS-22, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001731992
1.CHECK HEIGHT SENSOR POWER AND GROUND SUPPLY
Check height sensor power and ground supply. Refer to SCS-18, "
HEIGHT SENSOR : Diagnosis Procedure"
Are the inspection results normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK HEIGHT SENSOR SIGNAL CIRCUIT
1. Disconnect suspension control unit connector B3 and height sensor connector C8.
2. Check continuity between suspension control unit connector B3 (A) terminal 3 and height sensor connector C8 (B) terminal 2.
3. Check continuity between display unit harness connector B3 (A) terminal 3 and ground.
Are the continuity results as specified?
YES >> Replace the height sensor. Refer to RSU-26, "Removal and Installation"
NO >> Repair harness or connector.HEIGHT SEN : Voltage changes with vehicle height
AB
Continuity
Connector Terminal Connector Terminal
B33C82 Yes
A —Continuity
Connector Terminal
B3 3Ground No
ALEIA0035GB
Revision: March 2010 2008 QX56

A/T CONTROL SYSTEMTM-9
< FUNCTION DIAGNOSIS >
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Cross-Sectional View (4WD models)INFOID:0000000001603988
Shift MechanismINFOID:0000000001603989
The automatic transmission uses compact triple planet ary gear systems to improve power-transmission effi-
ciency, simplify construction and reduce weight.
It also employs an optimum shift control and super wide gear ratios. They improve starting performance and
acceleration during medium and high-speed operation.
CONSTRUCTION
1. Front planetary gear 2. Mid planetary gear 3. Rear planetary gear
4. Direct clutch 5. High and low reverse clutch 6. Reverse brake
7. Drum support 8. Forward brake 9. Low coast brake
10. Input shaft 11. Torque converter 12. Oil pump
13. Front brake 14. 3rd one-way clutch 15. Input clutch
16. 1st one-way clutch 17. Control valve with TCM 18. Forward one-way clutch
19. Adapter case 20. Output shaft
SCIA5268E
Revision: March 2010 2008 QX56

PRECAUTIONSTM-175
< PRECAUTION >
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• All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or reassembly.
• Gaskets, seals and O-rings should be replaced any time the transmission is disassembled.
• It is very important to perform func tional tests whenever they are indicated.
• The valve body contains precision parts and requires extreme care when parts are removed and serviced. Place disassembled valve body parts in order for easier and proper assembly. Care will also prevent springs
and small parts from becoming scattered or lost.
• Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.
• Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings and
seals, or hold bearings and washers in pl ace during assembly. Do not use grease.
• Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
• Clean or replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer. Refer to TM-
182, "A/T Fluid Cooler Cleaning".
• After overhaul, refill the transmission with new ATF.
• When the A/T drain plug is removed, only some of the fluid is drained. Old A/T fluid will remain in torque con- verter and ATF cooling system.
Always follow the procedures under “Changing A/T Fluid” in the AT section when changing A/T fluid. Refer to
TM-180, "
Changing the A/T Fluid (ATF)".
Service Notice or PrecautionINFOID:0000000001531487
ATF COOLER SERVICE
• If A/T fluid contains fictional material (clutches, bands, etc.), or if an A/T is repaired, overhauled, or replaced,
inspect and clean the A/T fluid cooler mounted in the radiat or or replace the radiator. Flush cooler lines with
cleaning solvent and compressed air after repair. For A/T fluid cooler cleaning procedure, refer to TM-182,
"A/T Fluid Cooler Cleaning". For radiator replacement, refer to CO-15, "Removal and Installation".
CHECKING AND CHANGING A/T FLUID
• Increase ATF oil temperature to 80 °C (176° F) first, then check and adjust oil level at 65 °C (149° F).
NOTE:
The A/T has both water cooling and air cooling systems. The air cooling system has a bypass valve. When
ATF oil temperature is at or below 50 °C (122° F), it does not flow through the air cooled system. If A/T oil
level is adjusted without flow throughout the entir e system, the level will be 10mm lower than required.
Therefore, all piping should be filled with oil when adjusting level.
OBD-II SELF-DIAGNOSIS
• A/T self-diagnosis is performed by the TCM in combination with the ECM. Refer to the table on TM-32,
"CONSULT-III Function (TRANSMISSION)" for the indicator used to display each self-diagnostic result.
• The self-diagnostic results indicated by the MIL are automatically stored in both the ECM and TCM memo- ries.
Always perform the procedure on TM-30, "
OBD-II Diagnostic Trouble Code (DTC)" to complete the
repair and avoid unnecessary blinking of the MIL.
For details of OBD-II, refer to TM-30
.
• Certain systems and components, especially those related to OBD, may use the new style slide-
locking type harness connector. For descrip tion and how to disconnect, refer to PG-65
.
Revision: March 2010 2008 QX56

WT-46
< ON-VEHICLE REPAIR >
WHEEL AND TIRE ASSEMBLY
ON-VEHICLE REPAIR
WHEEL AND TIRE ASSEMBLY
AdjustmentINFOID:0000000006059785
BALANCING WHEELS (ADHESIVE WEIGHT TYPE)
Preparation Before Adjustment
Remove inner and outer balance weights from the road wheel using releasing agent, remove double-faced
adhesive tape from the road wheel.
CAUTION:
• Be careful not scratch the road wheel during removal.
• After removing double-faced adhesive tape, wipe clean traces of releasing agent from the road wheel.
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)
SMA054D
Revision: March 2010 2008 QX56