2011 INFINITI QX56 oil temperature

EM-58
< REMOVAL AND INSTALLATION >
OIL PAN (UPPER)
Removal and Installation
INFOID:0000000006289563
REMOVAL
WARNING:
To avoid the danger of being scalded, never drain engine oil when engine is hot.
1. Remove oil filter. Refer to LU-9, "
Removal and Installation".
2. Remove oil cooler. Refer to LU-11, "
Exploded View".
3. Move A/C compressor to the position without the hindrance for work. Refer to HA-30, "
Exploded View".
4. Remove oil level gauge and oil level gauge guide.
5. Remove oil pressure switch and oil temperature sensor if necessary.
6. Remove rear plate cover.
7. Remove protector A and protector B. Refer to SCS-32, "
FRONT TUBE ASSEMBLY : Exploded View".
8. Remove front suspension rear cross member. Refer to TM-205, "
2WD : Exploded View" (2WD models) or
TM-208, "
4WD : Exploded View" (4WD models).
9. Remove steering gear assembly. Refer to ST-41, "
Exploded View".
10. Remove front final drive assembly. Refer to DLN-162, "
Exploded View".
11. Remove oil pan (lower). Refer to EM-54, "
Exploded View".
12. Remove oil strainer. Refer to EM-54, "
Exploded View".
13. Remove bolts fixing oil pan (upper) to transmission assembly.
14. Remove oil pan (upper) as per the following:
a. Loosen mounting bolts in the reverse order as shown in the fig- ure with power tool to remove.
NOTE:
Disregard No. 9, 16 when loosening.
b. Insert a suitable tool into the notch at oil pan (upper) (1) as shown.
 Pry off case by moving a suitable tool.
CAUTION:
Be careful not to damage the mating surfaces.
15. Remove O-ring from bottom of cylinder block and oil pump.
16. Remove oil pressure switch and oil temperature sensor, if necessary.
INSTALLATION
1. Install oil pan (upper) as per the following:
: Engine front
JPBIA3502ZZ
: Engine front
JPBIA2299ZZ
Revision: 2010 May2011 QX56

EM-86
< REMOVAL AND INSTALLATION >
CYLINDER HEAD
CYLINDER HEAD
Exploded ViewINFOID:0000000006289571
CAUTION:
A high degree of precision is required for a valve on the intake side. Never remove the valve related
parts unless necessary.
1. Valve lifter (EXH) 2. Valve collet (EXH) 3. Valve spring retainer (EXH)
4. Valve oil seal (EXH) 5. Valve spring (with valve spring seat)
(EXH)6. Valve guide (EXH)
7. Spark plug 8. Valve lifter (INT) 9. Valve collet (INT)
10. Valve spring retainer (INT) 11. Valve oil seal (INT) 12. Valve spring (with valve spring seat)
(INT)
13. Cylinder head bolt 14. Cylinder head (bank 2) 15. Valve seat (EXH)
16. Valve (EXH) 17. Cylinder head gasket (bank 2) 18. Oil filter (for VVEL ladder assembly)
19. Cylinder block 20. Valve (INT) 21. Valve seat (INT)
22. Cylinder head gasket (bank 1) 23. Cylinder head (bank 1) 24. Engine coolant temperature sensor
A. Comply with the installation proce-
dure when tightening. Refer to
EM-
87, "Removal and Installation".
Refer to GI-4, "
Components" for symbol marks in the figure.
JPBIA3524GB
Revision: 2010 May2011 QX56

ABBREVIATIONSGI-15
< HOW TO USE THIS MANUAL >
C
DE
F
G H
I
J
K L
M B
GI
N
O P
E
F
G
H
ABBREVIATION DESCRIPTION E/T Exhaust temperature
EBD Electric brake force distribution EC Engine control
ECL Engine coolant level
ECM Engine control module ECT Engine coolant temperature
ECV Electrical control valve
EEPROM Electrically erasable programmable read only memory EFT Engine fuel temperature
EGR Exhaust gas recirculation
EGRT Exhaust gas recirculation temperature EGT Exhaust gas temperature
EOP Engine oil pressure EP Exhaust pressure
EPR Exhaust pressure regulator EPS Electronically controlled power steering
ESP Electronic stability program system
EVAP canister Evaporative emission canister EXC Exhaust control
ABBREVIATION DESCRIPTION FC Fan control
FCW Forward collision warning FIC Fuel injector controlFP Fuel pump
FR Front
FRP Fuel rail pressure FRT Fuel rail temperature
FTP Fuel tank pressure FTT Fuel tank temperature
ABBREVIATION DESCRIPTION GND GroundGPS Global positioning systemGST Generic scan tool
ABBREVIATION DESCRIPTION HBMC Hydraulic body-motion control systemHDD Hard disk drive
HO2S Heated oxygen sensor HOC Heated oxidation catalyst
Revision: 2010 May2011 QX56

SERVICE INFORMATION FOR ELECTRICAL INCIDENTGI-37
< BASIC INSPECTION >
C
DE
F
G H
I
J
K L
M B
GI
N
O P
 Do not apply excessive shock to the control unit by dropping or hit- ting it.
 Be careful to prevent condensation in the control unit due to rapid
temperature changes and do not let water or rain get on it. If water
is found in the control unit, dry it fully and then install it in the vehi-
cle.
 Be careful not to let oil to get on the control unit connector.
 Avoid cleaning the control unit with volatile oil.
 Do not disassemble the contro l unit, and do not remove the upper
and lower covers.
 When using a DMM, be careful not to let test probes get close to each other to prevent the power transistor in the control unit from
damaging battery voltage because of short circuiting.
 When checking input and output signals of the control unit, use the
specified check adapter.
How to Check TerminalINFOID:0000000006280853
CONNECTOR AND TERMINAL PIN KIT
 Use the connector and terminal pin kits listed below when replacing connectors or terminals.
 The connector and terminal pin kits contain some of the most commonly used NISSAN/INFINITI connectors
and terminals. For detailed connector and terminal pin r eplacement procedures, refer to the latest NISSAN/
INFINITI CONNECTOR AND TERMINAL PIN SERVICE MANUAL.
SAIA0255E
SEF348N
Revision: 2010 May2011 QX56

INSPECTION AND ADJUSTMENTGI-65
< BASIC INSPECTION >
C
DE
F
G H
I
J
K L
M B
GI
N
O PINSPECTION AND ADJUSTMENT
ADDITIONAL SERVICE WHEN REMOVING BATTERY NEGATIVE TERMINAL
ADDITIONAL SERVICE WHEN REMOVING BATTERY NEGATIVE TERMINAL : Re-
quired Procedure After Battery Disconnection
INFOID:0000000006344676
*: Not equipped. SYSTEM ITEM REFERENCE
Front automatic air
conditioning system Temperature setting trimmer (Front)
HAC-68, "
FRONT AUTOMATIC
AIR CONDITIONING SYSTEM :
Temperature Setting Trimmer
(Front)"
Foot position setting trimmer
HAC-68, "
FRONT AUTOMATIC
AIR CONDITIONING SYSTEM :
Foot Position Setting Trimmer"
Inlet port memory function* —
Inlet port memory function (FRE)
HAC-69, "
FRONT AUTOMATIC
AIR CONDITIONING SYSTEM :
Inlet Port Memory
Function (FRE)"
Inlet port memory function (REC) HAC-69, "
FRONT AUTOMATIC
AIR CONDITIONING SYSTEM :
Inlet Port Memory Function (REC)"
ACCS (Advanced Cli-
mate Control System)Exhaust gas / outside odor detecting sensor sensitivity adjustment func-
tion
HAC-70, "
ACCS (ADVANCED
CLIMATE CONTROL SYSTEM) :
Exhaust Gas / Outside Odor De-
tecting Sensor Sensitivity Adjust-
ment Function"
Auto intake switch interlocking movement change function
HAC-70, "
ACCS (ADVANCED
CLIMATE CONTROL SYSTEM) :
Auto Intake Switch Interlocking
Movement Change Function"
Clean switch interlocking movement change function* —
Rear automatic air
conditioning system Temperature setting trimmer (Rear) HAC-69, "
REAR AUTOMATIC AIR
CONDITIONING SYSTEM : Tem-
perature Setting
Trimmer (Rear)"
Automatic drive posi-
tioner Automatic drive positioner system ADP-51, "
ADDITIONAL SERVICE
WHEN REMOVING BATTERY
NEGATIVE TERMINAL : Descrip-
tion"
Power window control Power window control system
PWC-31, "Description"
Sunroof system* Sunroof system —
Sunshade system* Sunshade system —
Rear view monitor* Rear view monitor predictive course line center position adjustment —
Around view monitor Predictive course line center position adjustment AV- 111 , "
Description"
Automatic back door
systemAutomatic back door system DLK-80, "
ADDITIONAL SERVICE
WHEN REMOVING BATTERY
NEGATIVE TERMINAL : Descrip-
tion"
Engine oil level read* Engine oil level read —
Revision: 2010 May2011 QX56

PRECAUTIONSHA-5
< PRECAUTION >
C
DE
F
G H
J
K L
M A
B
HA
N
O P
- Never allow lubricant (A/C System Oil Type R) to come in contact with styrene foam parts. Damage
may result.
REFRIGERANT CONNECTION
A new type refrigerant connection has been introduced to a ll refrigerant lines except the following location.
 Expansion valve to evaporator
 Refrigerant pressure sensor to liquid tank
WARNING:
Check that 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:
Observe the following when replacing or cleaning refrigerant cycle components.
 Store it in the same way at it is when mounted on the car when the compressor is removed. Failure
to do so will cause lubricant to enter the low-pressure chamber.
 Use always a torque wrench and a b ack-up wrench when connecting tubes.
 Plug immediately all openings to prevent entry of dust and mois ture after disconnecting tubes.
 Connect the pipes at the final stag e of the operation when installing an air conditioner in the vehicle.
Never remove the seal caps of pipes and other compon ents until just before required for connection.
 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.
 Remove thoroughly moisture from the refriger ation system before charging the refrigerant.
 Replace always used O-rings.
 Apply lubricant to circle of th e O-rings shown in illustration when connecting tube. Be careful not to
apply lubricant to threaded portion.
 O-ring must be closely attached to the groove portion of tube.
 Be careful not to damage O-ring and tube when replacing the O-ring.
 Connect tube until a click can be heard. Then tighten the nut or bolt by hand. Check that the O-ring is
installed to tube correctly.
 Perform leakage test and make sure that there is no leakage from connections after connecting line.
Disconnect that line and replace the O-ring when the refrigerant leaking point is found. Then tighten
connections of seal seat to the specified torque.
COMPRESSOR
CAUTION:
 Plug all openings to prevent moisture and foreign matter from entering.
 Store it in the same way at it is when moun ted on the car when the compressor is removed.
 Follow “MAINTENANCE OF LUBRICANT LEVEL IN CO MPRESSOR” exactly when replacing or repair-
ing compressor. Refer to HA-22, "
Description".
 Keep friction surfaces between clutch and pulley cl ean. Wipe it off by using a clean waste cloth
moistened with thinner if the surface is contaminated with lubricant.
Name A/C System Oil Type S
RHA861F
Revision: 2010 May2011 QX56

HA-22
< BASIC INSPECTION >
LUBRICANT
LUBRICANT
DescriptionINFOID:0000000006276153
MAINTENANCE OF LUBRICANT LEVEL
The compressor lubricant is circulating in the system together with the refrigerant. It is necessary to fill com-
pressor with lubricant when replacing A/C system pa rts or when a large amount of refrigerant leakage is
detected. It is important to always maintain lubricant level within the specified level. Otherwise, the following
conditions may occur.
 Insufficient lubricant amount: Stuck compressor
 Excessive lubricant amount: Insufficient cooling (caused by insufficient heat exchange)
InspectionINFOID:0000000006276154
If a compressor is malfunctioning (internal noise, insufficient cooling), check the compressor oil.
1.COMPRESSOR OIL JUDGMENT
1. Remove the compressor. Refer to HA-30, "
Exploded View".
2. Sample a compressor oil and judge on the figure.
Judgement result 1>>Replace compressor only.
Judgement result 2>>Replace compressor and liquid tank.
Perform Lubricant Return OperationINFOID:0000000006276155
CAUTION:
If a large amount of refrigerant or lubricant leakag e is detected, never perform lubricant return opera-
tion.
1. Start the engine and set to the following conditions.
 Engine speed: Idling to 1,200 rpm
 A/C switch: ON
 Fan speed: Maximum speed set
 Intake door position: Recirculation
 Temperature setting: Full cold
2. Perform lubricant return operation for approximately 10 minutes.
3. Stop the engine.
4. Lubricant return operation is complete.
Lubricant Adjusting Procedure for Comp onents Replacement Except Compressor
INFOID:0000000006276156
Fill with lubricant for the amount that is calculated according to the following conditions.
Example: Lubricant amount to be added when replacing evapor ator and liquid tank [m (Imp fl oz.)] = 35 (1.2)
+ 20 (0.7) + 5 (0.2) + α
Name A/C System Oil Type S
JSIIA0927GB
Revision: 2010 May2011 QX56

SYSTEMHAC-17
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
FRONT AUTOMATIC AIR CONDITIONIN G SYSTEM : Air Outlet ControlINFOID:0000000006275864
 While air outlet is in automatic control, A/C auto amp. selects the
front mode door position depending on a target front air mix door
angle and outlet air temperature calculated from sunload.
 If ambient temperature is excessively low, D/F is selected to pre- vent windshield fogging when air outlet is set to FOOT.
FRONT AUTOMATIC AIR CONDITIONIN G SYSTEM : Compressor Control
INFOID:0000000006275865
DESCRIPTION
 When the compressor activation condition is satisfied while blower motor is activated, A/C auto amp. trans-
mits A/C ON signal and blower fan ON signal to ECM via CAN communication.
 ECM judges that the compressor can be activated depending on each sensors state (refrigerant pressure sensor signal, and others). And transmits A/C compress or request signal to IPDM E/R via CAN communica-
tion.
 IPDM E/R turns A/C relay ON and activates the compressor depending on request from ECM.
COMPRESSOR PROTECTION CONTROL AT PRESSURE MALFUNCTION
When high-pressure side value that is detected by refri gerant pressure sensor is as per the following state,
ECM requests IPDM E/R to turn A/C relay OFF and stops the compressor.
 3.12 MPa (31.82 kg/cm
2, 452.4 psi) or more (When the engine speed is less than 1,500 rpm)
 2.74 MPa (27.95 kg/cm
2, 397.3 psi) or more (When the engine speed is 1,500 rpm or more)
 0.14 MPa (1.43 kg/cm
2, 20.3 psi) or less
COMPRESSOR OIL CIRCULATION CONTROL
When the engine starts while the engine coolant temperature is 56 °C (133 °F) or less, ECM activates the com-
pressor for approximately 6 seconds and circulates the compressor lubricant once.
LOW TEMPERATURE PROTECTION CONTROL
 When intake sensor detects that front evaporator fin temperature is
2.5 °C (37 °F) or less, A/C auto amp. requests ECM to turn com-
pressor OFF, and stops the compressor.
 When the front evaporator fin temperature returns to 5.0 °C (41 °F)
or more, the compressor is activated.
OPERATING RATE CONTROL
When set temperature is other than fully cold or air out let is “VENT”, “B/L” or “FOOT” A/C auto amp. controls
the compressor activation depending on ambient temperature.
AIR CONDITIONING CUT CONTROL
When set engine is running is excessively high load conditi on, ECM requests IPDM E/R to turn A/C relay OFF,
and stops the compressor. Refer to EC-47, "
AIR CONDITIONING CUT CONTRO L : System Description" for
details.
JMIIA0730GB
JMIIA0742GB
Revision: 2010 May2011 QX56