2007 INFINITI QX56 check oil

TRANSMISSION ASSEMBLY
AT-225
< SERVICE INFORMATION >
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• When installing transmission to the engine, attach the bolts as shown.
NOTE:
*: No.2 bolt also secures air breather vent.
CAUTION:
• When replacing an engine or transmission you must make
sure the dowels are installed correctly during re-assembly.
• Improper alignment caused by missing dowels may cause
vibration, oil leaks or breakage of drivetrain components.
• Align the positions of bolts for drive plate with those of the torque
converter, and temporarily tighten the bolts. Then tighten the bolts
with the specified torque.
CAUTION:
• When turning crankshaft, turn it clockwise as viewed from the
front of the engine.
• After converter is installed to drive plate, rotate crankshaft
several turns and check to be sure that transmission rotates
freely without binding.
• Install crankshaft position sensor (POS).
• After completing installation check fluid leakage, fluid level and the
positions of A/T. Refer to AT-13, "
Checking Automatic Transmis-
sion Fluid (ATF)", AT-208, "Checking of A/T Position" and AT-208, "Adjustment of A/T Position".
Removal and Installation (4WD)INFOID:0000000003532482
COMPONENTS
Transmission to engine bolts : 113 N·m (12 kg-m,
83 ft-lb)
LCIA0371E
LCIA0335E
AWDIA0441GB

TRANSMISSION ASSEMBLY
AT-227
< SERVICE INFORMATION >
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17. Plug any openings such as the fluid charging pipe hole.
18. Remove A/T assembly to engine bolts using power tool.
19. Remove A/T assembly with transfer from vehicle.
CAUTION:
• Secure torque converter to prevent it from dropping.
• Secure A/T assembly to transmission jack.
20. Remove transfer from A/T assembly. Refer to TF-128, "
Removal and Installation".
INSPECTION
Installation and Inspection of Torque Converter
• After inserting a torque converter to a transmission, be sure to
check dimension A to ensure it is within specifications.
INSTALLATION
Installation of the remaining components is in the reverse order of removal, while paying attention to the fol-
lowing:
• When installing transmission to the engine, attach the bolts as shown.
NOTE:
*: No.2 bolt also secures air breather vent.
CAUTION:
• When replacing an engine or transmission you must make
sure the dowels are installed correctly during re-assembly.
• Improper alignment caused by missing dowels may cause
vibration, oil leaks or breakage of drivetrain components.
• Align the positions of bolts for drive plate with those of the torque
converter, and temporarily tighten the bolts. Then tighten the bolts
with the specified torque.
CAUTION:
• When turning crankshaft, turn it clockwise as viewed from the
front of the engine.
• After converter is installed to drive plate, rotate crankshaft
several turns and check to be sure that transmission rotates
freely without binding.
• Install crankshaft position sensor (POS).
• After completing installation, check fluid leakage, fluid level, and
the positions of A/T. Refer to AT-13, "
Checking Automatic Trans-
mission Fluid (ATF)", AT-208, "Checking of A/T Position" and AT-208, "Adjustment of A/T Position". Dimension A : 24.0 mm (0.94 in) or more
SAT017B
Transmission to engine bolts : 113 N·m (12 kg-m,
83 ft-lb)
LCIA0371E
LCIA0335E

AT-262
< SERVICE INFORMATION >
REPAIR FOR COMPONENT PARTS
2. Install snap ring in front sun gear using suitable tool.
3. Check operation of 3rd one-way clutch.
a. Hold oil pump assembly and turn front sun gear.
b. Check 3rd one-way clutch for correct locking and unlocking
directions.
CAUTION:
If not as shown, check installation direction of 3rd one-way
clutch.
Front Carrier, Input Clutch, Rear Internal GearINFOID:0000000003532489
COMPONENTS
SCIA3110E
SCIA3131E

ASSEMBLY
AT-297
< SERVICE INFORMATION >
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17. Install the oil pan and new oil pan gasket. Refer to AT-209, "Oil Pan".
CAUTION:
• Do not reuse the oil pan gasket.
• Completely remove all moisture, oil and old gasket from the oil pan gasket mating surfaces and
holes.
• Always replace the oil pan bolts as they are self-sealing.
• Be sure the oil pan drain plug hole is located to the rear of the transmission assembly.
• Partially install the oil pan bolts in a criss-cross pattern to prevent dislocation of the gasket.
• Be careful not to pinch harnesses.
18. Install drain plug in oil pan with new gasket.
CAUTION:
Do not reuse the drain plug gasket.
19. Install torque converter.
a. Pour ATF into torque converter.
•Approximately 2 liter (2-1/8 US qt, 1-3/4 Imp qt) of fluid is
required for a new torque converter.
•When reusing old torque converter, add the same amount
of fluid as was drained.
b. Install torque converter while aligning notches of torque con-
verter with notches of oil pump.
CAUTION:
Install torque converter while rotating it.
c. Measure distance “A” to check that torque converter is in proper
position.Drain plug : 34 N·m (3.5 kg-m, 25 ft-lb)
SAT428DA
SCIA5010E
Distance “A” : 24.0 mm (0.94 in) or more
SAT017B

ATC-1
AIR CONDITIONER
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SECTION AT C
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CONTENTS
AUTOMATIC AIR CONDITIONER
SERVICE INFORMATION .. ..........................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution for Working with HFC-134a (R-134a) ......3
Contaminated Refrigerant .........................................3
General Refrigerant Precaution ................................4
Precaution for Leak Detection Dye ...........................4
A/C Identification Label .............................................4
Precaution for Refrigerant Connection ......................4
Precaution for Service of Compressor ................ ......9
Precaution for Service Equipment ....................... ......9
PREPARATION ..................................................12
Special Service Tool ........................................... ....12
HFC-134a (R-134a) Service Tool and Equipment ....12
Commercial Service Tool ........................................14
REFRIGERATION SYSTEM ..............................16
Refrigerant Cycle ................................................ ....16
Refrigerant System Protection ................................16
Component Part Location ................................... ....17
OIL ......................................................................20
Maintenance of Oil Quantity in Compressor ....... ....20
AIR CONDITIONER CONTROL .........................22
Description .......................................................... ....22
Operation ................................................................22
Description of Control System .................................23
Control Operation ....................................................24
Discharge Air Flow ..................................................26
System Description (Front) .....................................27
System Description (Rear) .................................. ....28
CAN Communication System Description ...............29
TROUBLE DIAGNOSIS .....................................30
CONSULT-II Function (HVAC) ............................ ....30
CONSULT-II Function (BCM) ..................................31
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ................................................... ....
32
Component Parts and Harness Connector Loca-
tion ...........................................................................
32
Schematic ................................................................36
Wiring Diagram - A/C,A - .........................................37
Front Air Control Terminal and Reference Value ....47
A/C System Self-Diagnosis Function .......................48
Operational Check (Front) ................................... ....50
Operational Check (Rear) ........................................51
Power Supply and Ground Circuit for Front Air
Control ................................................................. ....
52
Mode Door Motor Circuit .........................................54
Air Mix Door Motor Circuit ................................... ....59
Intake Door Motor Circuit .........................................70
Defroster Door Motor Circuit ....................................74
Front Blower Motor Circuit .......................................78
Rear Blower Motor Circuit ................................... ....85
Rear Air Control Circuit ............................................93
Magnet Clutch Circuit ..............................................96
Insufficient Cooling ................................................100
Insufficient Heating ................................................108
Noise .....................................................................109
Self-Diagnosis .......................................................111
Memory Function ...................................................112
Water Valve Circuit ................................................113
Ambient Sensor Circuit ..........................................114
In-vehicle Sensor Circuit ........................................116
Optical Sensor Circuit ............................................119
Intake Sensor Circuit .............................................120
CONTROL UNIT ..............................................123
Removal and Installation .......................................123
AMBIENT SENSOR ........................................124
Removal and Installation .......................................124
IN-VEHICLE SENSOR ....................................125
Removal and Installation .......................................125
OPTICAL SENSOR .........................................126

ATC-8
< SERVICE INFORMATION >
PRECAUTIONS
*: Always check with the Parts Department for the latest parts information.
WARNING:
Make sure all refrigerant is discharged into the recycling equipment and the pressure in the system is
less than atmospheric pressure. Then gradually loo sen the discharge side hose fitting and remove it.
CAUTION:
When replacing or cleaning refrigeran t cycle components, observe the following.
• When the compressor is removed, store it in the same position as it is when mounted on the car.
Failure to do so will cause oil to enter the low pressure chamber.
• When connecting tubes, always use a torque wrench and a back-up wrench.
• After disconnecting tubes, immedi ately plug all openings to prevent entry of dirt and moisture.
• When installing an air conditioner in the vehicle, connect the pipes as the final stage of the opera-
tion. Do not remove the seal caps of pipes and othe r components until just before required for con-
nection.
• Allow components stored in cool areas to warm to working area temperature before removing seal
caps. This prevents condensation from forming inside A/C components.
• Thoroughly remove moisture from the refrigerat ion system before charging the refrigerant.
• Always replace used O-rings.
• When connecting tube, apply oil to circle of the O-rings shown in illustration. Be careful not to apply
oil to threaded portion.
Oil name: NISSAN A/C System Oil Type S or equivalent
• O-ring must be closely attached to dented portion of tube.
• When replacing the O-ring, be careful not to damage O-ring and tube.
• Connect tube until you hear it cl ick, then tighten the nut or bolt by hand until snug. Make sure that
the O-ring is installed to tube correctly.
• After connecting line, conduct leak test and make sure that there is no leakage from connections.
When the gas leaking point is foun d, disconnect that line and replace the O-ring. Then tighten con-
nections of seal seat to the specified torque.
Connec-
tion typeO-ring
size Part number* D mm (in) W mm (in)
New 8 92471 N8210 6.8 (0.268) 1.85 (0.0728)
Former 10 J2476 89956 9.25 (0.3642) 1.78 (0.0701) New 1292472 N8210 10.9 (0.429) 2.43 (0.0957)
Former 92475 71L00 11.0 (0.433) 2.4 (0.094) New 1692473 N8210 13.6 (0.535) 2.43 (0.0957)
Former 92475 72L00 14.3 (0.563) 2.3 (0.091) New 1992474 N8210 16.5 (0.650) 2.43 (0.0957)
Former 92477 N8200 17.12 (0.6740) 1.78 (0.0701) New 24 92195 AH300 21.8 (0.858) 2.4 (0.094)
SHA814E

PRECAUTIONSATC-9
< SERVICE INFORMATION >
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Precaution for Service of CompressorINFOID:0000000003533224
• Plug all openings to prevent moisture and foreign matter from entering.
• When the compressor is removed, store it in the same position as it is when mounted on the car.
• When replacing or repairing co mpressor, follow “Maintenance of Oil Quantity in Compressor”
exactly. Refer to ATC-20, "
Maintenance of Oil Quantity in Compressor".
• Keep friction surfaces between clutch and pulley clean . If the surface is contaminated with oil, wipe
it off by using a clean wast e cloth moistened with thinner.
• After compressor service operation, turn the compressor shaft by hand more than 5 turns in both
directions. This will equa lly distribute oil inside the compresso r. After the compressor is installed,
let the engine idle and oper ate the compressor for 1 hour.
• After replacing the compressor magnet clutch, ap ply voltage to the new one and check for normal
operation. Refer to ATC-155, "
Removal and Installation for Compressor Clutch".
Precaution for Service EquipmentINFOID:0000000003533225
RECOVERY/RECYCLING EQUIPMENT
Follow the manufacturer's instructions for machine operation and machine maintenance. Never introduce any
refrigerant other than that specified into the machine.
ELECTRONIC LEAK DETECTOR
Follow the manufacturer's instructions fo r tester operation and tester maintenance.
VACUUM PUMP
1. Plug 2. O-ring A. Torque wrench
B. Apply oil C. Do not apply oil to threads D. NG (no good)
E. OK (okay) F. Inflated portion
WJIA1774E

ATC-20
< SERVICE INFORMATION >
OIL
OIL
Maintenance of Oil Quantity in CompressorINFOID:0000000003533232
The oil in the compressor circulates through the system with the refrigerant. Add oil to compressor when
replacing any component or after a large refrigerant leakage has occurred. It is important to maintain the spec-
ified amount.
If oil quantity is not maintained properly, the following malfunctions may result:
• Lack of oil: May lead to a seized compressor
• Excessive oil: Inadequate cooling (thermal exchange interference)
OIL
Name: NISSAN A/C System Oil Type S or equivalent
CHECKING AND ADJUSTING
CAUTION:
If excessive oil leakage is noted, do no t perform the oil return operation.
Start the engine and set the following conditions:
Test Condition
• Engine speed: Idling to 1,200 rpm
• A/C switch: On
• Blower fan speed: MAX position
• Temp. control: Optional [Set so that intake air temperature is 25 ° to 30 ° C (77 ° to 86 °F)]
• Intake position: Recirculation ( )
• Perform oil return operation for about ten minutes
Adjust the oil quantity according to the following table.
Oil Adjusting Procedure for Components Replacement Except Compressor
After replacing any of the following major component s, add the correct amount of oil to the system.
Amount of oil to be added :
• *1: If refrigerant leak is small, no addition of oil is needed.
Oil Adjustment Procedure for Compressor Replacement
Part replaced Oil to be added to system
Remarks
Amount of oil
m (US fl oz, Imp fl oz)
Front evaporator 75 (2.5, 2.6) —
Rear evaporator 75 (2.5, 2.6) —
Condenser 75 (2.5, 2.6) —
Liquid tank 5 (0.2, 0.2) Add if compressor is not replaced.
In case of refrigerant leak 30 (1.0, 1.1) Large leak
— Small leak *1