atf INFINITI QX56 2011 Factory Service Manual
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![INFINITI QX56 2011 Factory Service Manual
EC-148
< BASIC INSPECTION >[VK56VD]
IDLE AIR VOLUME LEARNING
IDLE AIR VOLUME LEARNING
DescriptionINFOID:0000000006217750
Idle Air Volume Learning is a function of ECM to learn
the idle air volume th](/img/42/57033/w960_57033-2171.png "INFINITI QX56 2011 Factory Service Manual
EC-148
< BASIC INSPECTION >[VK56VD]
IDLE AIR VOLUME LEARNING
IDLE AIR VOLUME LEARNING
DescriptionINFOID:0000000006217750
Idle Air Volume Learning is a function of ECM to learn
the idle air volume th")
EC-148
< BASIC INSPECTION >[VK56VD]
IDLE AIR VOLUME LEARNING
IDLE AIR VOLUME LEARNING
DescriptionINFOID:0000000006217750
Idle Air Volume Learning is a function of ECM to learn
the idle air volume that keeps engine idle speed within
the specific range. It must be perfo rmed under the following conditions:
Each time the electric throttle control actuator or ECM is replaced.
Idle speed or ignition timing is out of the specification.
Work ProcedureINFOID:0000000006217751
1.PRECONDITIONING
Check that all of the following conditions are satisfied.
Learning will be cancelled if any of the follo wing conditions are missed for even a moment.
Battery voltage: More than 12.9 V (At idle)
Engine coolant temperature: 70 - 105 °C (158 - 221 °F)
Selector lever position: P or N
Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is
started the headlamp will not illuminate.
Steering wheel: Neutral (Straight-ahead position)
Vehicle speed: Stopped
Transmission: Warmed-up
- With CONSULT-III: Drive vehicle until “ATF TEMP 2” in “DATA MONITOR” mode of “A/T” system indicates
less than 0.9 V.
- Without CONSULT-III: Drive vehicle for 10 minutes.
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 3.
2.PERFORM IDLE AIR VOLUME LEARNING
WITH CONSULT-III
1. Perform Accelerator Pedal Released Position Learning. Refer to EC-146, "
Work Procedure".
2. Perform Throttle Valve Closed Position Learning. EC-147, "
Work Procedure".
3. Start engine and warm it up to normal operating temperature.
4. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.
5. Touch “START” and wait 20 seconds.
Is
“CMPLT” displayed on CONSULT-III screen?
YES >> GO TO 4.
NO >> GO TO 5.
3.PERFORM IDLE AIR VOLUME LEARNING
WITHOUT CONSULT-III
NOTE:
It is better to count the ti me accurately with a clock.
It is impossible to switch the di agnostic mode when an accelerator pedal position sensor circuit has
a malfunction.
1. Perform Accelerator Pedal Released Position Learning. Refer to EC-146, "
Work Procedure".
2. Perform Throttle Valve Closed Position Learning. EC-147, "
Work Procedure".
3. Start engine and warm it up to normal operating temperature.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Confirm that accelerator pedal is fully releas ed, turn ignition switch ON and wait 3 seconds.
6. Repeat the following procedure quickly 5 times within 5 seconds.
- Fully depress the accelerator pedal.
- Fully release the accelerator pedal.
7. Wait 7 seconds, fully depress the accelerator pedal for approx. 20 seconds until the MIL stops blinking
and turns ON.
8. Fully release the accelerator pedal within 3 seconds after the MIL turns ON.
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![INFINITI QX56 2011 Factory Service Manual
TROUBLE DIAGNOSIS - SPECIFICATION VALUEEC-161
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DescriptionINFOID:000000](/img/42/57033/w960_57033-2184.png "INFINITI QX56 2011 Factory Service Manual
TROUBLE DIAGNOSIS - SPECIFICATION VALUEEC-161
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
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DTC/CIRCUIT DIAGNOSIS
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DescriptionINFOID:000000")
TROUBLE DIAGNOSIS - SPECIFICATION VALUEEC-161
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DescriptionINFOID:0000000006217760
The specification (SP) value indicates the tolerance of
the value that is displayed in “SPEC” in “DATA MONI-
TOR” mode of CONSULT-III during normal operation of the Engine Control System. When the value in “SPEC”
in “DATA MONITOR” mode is within the SP value, t he Engine Control System is confirmed OK. When the
value in “SPEC” in “DATA MONITOR” mode is NOT wit hin the SP value, the Engine Control System may have
one or more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not illuminate
the MIL.
The SP value will be displayed for the following items:
B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board correc- tion)
A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)
MAS A/F SE-B1/B2 (The signal voltage of the mass air flow sensor)
IDLE FUEL PRES MAX/MIN (the signal voltage of the fuel rail pressure sensor)
Component Function CheckINFOID:0000000006217761
1.PRECONDITIONING
Check that all of the following conditions are satisfied.
TESTING CONDITION
Vehicle driven distance: More than 5,000 km (3,107 miles)
Barometric pressure: 98.3 - 104.3 kPa (0.983 - 1.043 bar, 1.003 - 1.064 kg/cm
2, 14.25 - 15.12 psi)
Atmospheric temperature: 20 - 30 °C (68 - 86 °F)
Engine coolant temperature: 75 - 95 °C (167 - 203 °F)
Transmission: Warmed-up
- After the engine is warmed up to normal operating temperat ure, drive vehicle until “ATF TEMP 2” (A/T fluid
temperature sensor signal) indicates more than 60 °C (140 °F).
Electrical load: Not applied
- Rear window defogger switch, air conditioner switch and li ghting switch are OFF. Steering wheel is straight
ahead.
Engine speed: Idle
Gear position: Neutral ( or parking)
>> GO TO 2.
2.PERFORM SPEC IN DATA MONITOR MODE
WITH CONSULT-III
NOTE:
Perform “SPEC” in “DATA MONITOR” mode in maximum scale display.
1. Perform EC-139, "
Work Procedure".
2. Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2”, “MAS A/F SE-B1” in “SPEC” of “DATA
MONITOR” mode with CONSULT-III.
3. Check that monitor items are within the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Proceed to EC-162, "
Diagnosis Procedure".
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GI-14
< HOW TO USE THIS MANUAL >
ABBREVIATIONS
ABBREVIATIONS
Abbreviation ListINFOID:0000000006280882
The following ABBREVIATIONS are used:
A
B
C
D
ABBREVIATION DESCRIPTION
A/C Air conditioner
A/C Air conditioning
A/F sensor Air fuel ratio sensor A/T Automatic transaxle/transmission
ABS Anti-lock braking system
ACCS Advance climate control system ACL Air cleaner
AP Accelerator pedal
APP Accelerator pedal position ATF Automatic transmission fluid AV Audio visual
AWD All wheel drive
ABBREVIATION DESCRIPTION BARO Barometric pressureBCM Body control module
BLSD Brake limited slip differential BPP Brake pedal positionBSI Blind spot intervention
BSW Blind spot warning
ABBREVIATION DESCRIPTION CKP Crankshaft positionCL Closed loop
CMP Camshaft position CPP Clutch pedal positionCTP Closed throttle position
CVT Continuously Variable transaxle/transmission
ABBREVIATION DESCRIPTION D
1Drive range first gear
D
2Drive range second gear
D
3Drive range third gear
D
4Drive range fourth gear
DCA Distance control assist DFI Direct fuel injection system
DLC Data link connector
DTC Diagnostic trouble code
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MA-10
< PERIODIC MAINTENANCE >
RECOMMENDED FLUIDS AND LUBRICANTS
RECOMMENDED FLUIDS AND LUBRICANTS
Fluids and LubricantsINFOID:0000000006220904
*1: For further details, see “Engine Oil Recommendation”.
*2: Using automatic transmission fluid other than Genuine NISSAN Matic S ATF will cause deterioration in driveability and autom atic
transmission durability, and may damage the automatic transmission, which is not covered by the INFINITI new vehicle limited wa rranty.
*3: DEXRON™ VI type ATF may also be used.
*4: Available in mainland U.S.A. through an INFINITI dealer.
*5: Using transfer fluid other t han Genuine NISSAN Transfer Fluid will damage the transfer , which is not covered by the INFINITI new
vehicle limited warranty. See an INFINITI retailer for recommended transfer fluid.
*6: For hot climates, Viscosity SAE 90 is suitable for ambient temperatures above 0 °C (32 °F)
*7: See an INFINITI dealer for service for synthetic oil.
*8: Using Hydraulic Suspen sion fluid other than Genuine NISSAN Hydraulic Susp ension fluid will damage the Hydraulic Suspension,
which is not covered by the INFINITI new vehicle limited warranty. See an INFINITI retailer for recommended hydraulic suspensio n fluid.
*9: The fluid capacity is the reference value.
Engine Oil RecommendationINFOID:0000000006287732
NISSAN recommends the use of an energy conservi ng oil in order to improve fuel economy.
Select only engine oils that meet the American Petroleum Institute (API) certification and International Lubri-
cant Standardization and Approval Committee (ILSAC) ce rtification and SAE viscosity standard. These oils
have the API certification mark on t he front of the container. Oils which do not have the specified quality label
should not be used as they could cause engine damage.
Capacity (Approximate) Recommended Fluids/Lubricants
US measure Imp measure Liter
Engine oil
Drain and refill With oil filter change 6-7/8 qt 5-3/4 qt 6.5
Engine oil with API Certification Mark
*1
Viscosity SAE 5W-30
Without oil filter change 6-4/8 qt 5-1/2 qt 6.2
Dry engine (engine overhaul) 8 qt 6-3/4 qt 7.6
Cooling system With reservoir tank 15
-6/8 qt 13-1/8 qt 14.9
Genuine NISSAN Long Life Antifreeze/
Coolant (blue) or equivalent
Reservoir tank 1 qt 7/8 qt 1.0
Automatic transmission fluid 10-5/8 qt
*98-3/4 qt*910.0*9Genuine NISSAN Matic S ATF *2
Power steering fluid 1-1/8 qt 7/8 qt 1.0
Genuine NISSAN PSF or equivalent*3
Brake fluid — — —Genuine NISSAN Super Heavy Duty
Brake Fluid*4 or equivalent DOT 3 (US FM-
VSS No. 116)
Transfer fluid 3-1/8 pt 2-5/8 pt 1.5 Genuine NISSAN Transfer Fluid for
ATX90A transfer*
5
Differential gear oilFront 1-5/8 pt 1-3/8 pt 0.75
Genuine NISSAN Differential Oil Hypoid
Super GL-5 80W-90 or API GL-5, Viscosity
SAE 80W-90*
6
Rear 3/3/4 pt 3-1/8 pt 1.75Genuine NISSAN Differential Oil Synthetic
75W-90 or API GL-5 synthetic gear oil, Vis-
cosity SAE 75W-90*7
Suspension fluid — — —
Genuine NISSAN Hydraulic Suspension
Fluid*8
Multi-purpose grease — — — NLGI No. 2 (Lithium soap base)
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![INFINITI QX56 2011 Factory Service Manual
MWI
DIAGNOSIS SYSTEM (COMBINATION METER)
MWI-31
< SYSTEM DESCRIPTION >
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[ ° C] XValue of engine coolant temperature signal is received from ECM via CAN com](/img/42/57033/w960_57033-3773.png "INFINITI QX56 2011 Factory Service Manual
MWI
DIAGNOSIS SYSTEM (COMBINATION METER)
MWI-31
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[ ° C] XValue of engine coolant temperature signal is received from ECM via CAN com")
MWI
DIAGNOSIS SYSTEM (COMBINATION METER)
MWI-31
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W TEMP METER
[ ° C] XValue of engine coolant temperature signal is received from ECM via CAN com-
munication.
NOTE:
215 is displayed when the malfunction signal is input.
ABS W/L
[On/Off] Status of ABS warning lamp detected fr
om ABS warning lamp signal is received
from ABS actuator and electric unit (control unit) via CAN communication.
VDC/TCS IND
[On/Off] Status of VDC OFF indicator lamp detected from VDC OFF indicator lamp signal
is received from ABS actuator
and electric unit (control unit) via CAN communica-
tion.
SLIP IND
[On/Off] Status of VDC warning lamp detected from VDC warning lamp signal received
from ABS actuator and electric unit (control unit) via CAN communication.
BRAKE W/L
[On/Off] Status of brake warning lamp detected from brake warning lamp signal is received
from ABS actuator and electric unit (control unit) via CAN communication.
NOTE:
Displays “Off” if the brake warning lamp is illuminated when the valve check starts,
the parking brake switch is turned ON or the brake fluid level switch is turned ON.
DOOR W/L
[On/Off] Status of door open warning detected from door switch signal received from BCM
via CAN communication.
HI-BEAM IND
[On/Off] Status of high beam indicator lamp detected from high beam request signal is re-
ceived from BCM via CAN communication.
TURN IND
[On/Off] Status of turn indicator lamp detected from turn indicator signal is received from
BCM via CAN communication.
FR FOG IND
[Off] This item is displayed, but cannot be monitored.
RR FOG IND
[Off] This item is displayed, but cannot be monitored.
LIGHT IND
[On/Off] Status of light indicator lamp detected from position light request signal is received
from BCM via CAN communication.
OIL W/L
[On/Off] Status of oil pressure warning lamp detected from oil pressure switch signal is re-
ceived from BCM via CAN communication.
MIL
[On/Off] Status of malfunction indicator lamp detected from malfunctioning indicator lamp
signal is received from ECM via CAN communication.
GLOW IND
[Off] This item is displayed, but cannot be monitored.
CRUISE IND
[On/Off] Status of CRUISE indicator detected from ASCD status signal is received from
ECM via CAN communicat ion. (ASCD models)
Status of CRUISE indicator de tected from meter display signal is received from
ADAS control unit via CAN communication. (ICC models)
SET IND
[On/Off] Status of SET indicator detected from meter display signal is received from ADAS
control unit via CAN communication.
CRUISE W/L
[On/Off] Status of CRUISE warning lamp
judged from ICC warning lamp signal received
from ADAS control unit with CAN communication line.
BA W/L
[On/Off] Status of IBA OFF indicator lamp judged from IBA OFF indicator lamp signal re-
ceived from ADAS control unit with CAN communication line.
ATC/T-AMT W/L
[On/Off] Status of A/T CHECK warning lamp judged
from A/T CHECK indicator lamp signal
received from TCM with CAN communication line.
ATF TEMP W/L
[Off] This item is displayed, but cannot be monitored.
4WD W/L
[On/Off] Status of 4WD warning lamp judged from 4WD warning lamp signal received from
4WD control unit with
CAN communication line.
FUEL W/L
[On/Off] Low-fuel warning lamp status detected by the identified fuel level.
WASHER W/L
[On/Off] Status of low washer fluid warning judged from washer level switch input to com-
bination meter.
Display item [Unit]
MAIN
SIGNALS Description
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MWI-34
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (COMBINATION METER)
Display item Description
ABS W/L Lighting history of ABS warning lamp.
VDC/TCS IND Lighting history of VDC OFF indicator lamp.
SLIP IND Lighting history of VDC warning lamp.
BRAKE W/L Lighting history of brake warning lamp.
DOOR W/L Lighting history of door open warning.
TRUNK/GLAS-H This item is displa yed, but cannot be monitored.
OIL W/L Lighting history of oil pressure warning lamp.
C-ENG W/L Lighting history of malfunction indicator lamp.
C-ENG2 W/L This item is displayed, but cannot be monitored.
CRUISE IND Lighting history of CRUISE indicator lamp.
SET IND Lighting history of SET indicator lamp.
CRUISE W/L Lighting history of CRUISE warning lamp.
BA W/L Lighting history of IBA OFF indicator lamp.
O/D OFF IND This item is displayed, but cannot be monitored.
ATC/T-AMT W/L Lighting history of A/T CHECK warning lamp.
ATF TEMP W/L This item is displayed, but cannot be monitored.
CVT IND This item is displayed, but cannot be monitored.
SPORT IND This item is displayed, but cannot be monitored.
4WD W/L Lighting history of 4WD warning lamp.
FUEL W/L Lighting history of low fuel level warning.
WASHER W/L Lighting history of low washer fluid warning.
AIR PRES W/L Lighting history of low tire pressure warning lamp.
KEY G/Y W/L Lighting history of KEY warning lamp.
KEY R W/L This item is displaye d, but cannot be monitored.
KEY KNOB W/L This item is displa yed, but cannot be monitored.
EPS W/L This item is displayed, but cannot be monitored.
e-4WD This item is displayed, but cannot be monitored.
AFS OFF IND This item is displayed, but cannot be monitored.
4WAS/RAS W/L This item is displayed, but cannot be monitored.
HDC W/L This item is displayed, but cannot be monitored.
SYS FAIL W/L This item is displa yed, but cannot be monitored.
SFT POSI W/L This item is displayed, but cannot be monitored.
HV BAT W/L This item is displayed, but cannot be monitored.
HEV BRAKE W/L This item is displayed, but cannot be monitored.
SFT OPER W/L This item is displayed, but cannot be monitored.
LANE W/L Lighting history of lane departure warning lamp.
CHAGE W/L This item is displayed, but cannot be monitored.
OIL LEV LOW This item is displayed, but cannot be monitored.
DPF W/L This item is displayed, but cannot be monitored.
TRAILER IND This item is displayed, but cannot be monitored.
RUN FLAT W/L This item is displa yed, but cannot be monitored.
E-SUS W/L This item is displayed, but cannot be monitored.
LAUNCH CNT W/L This item is displayed, but cannot be monitored.
BRAKE PAD W/L This item is displa yed, but cannot be monitored.
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MWI-36
< ECU DIAGNOSIS INFORMATION >
COMBINATION METER
LIGHT INDIgnition switch
ONTail lamp indicator lamp ON On
Tail lamp indicator lamp OFF Off
OIL W/L Ignition switch
ONOil pressure warning lamp ON On
Oil pressure warning lamp OFF Off
MIL Ignition switch
ONMalfunction indicator lamp ON On
Malfunction indicator lamp OFF Off
GLOW IND Ignition switch
ONNOTE:
This item is displayed, but cannot be moni-
tored.
Off
CRUISE IND Ignition switch
ONCRUISE indicator ON On
CRUISE indicator OFF Off
SET IND Ignition switch
ONSET indicator ON On
SET indicator OFF Off
CRUISE W/L Ignition switch
ONCRUISE warning lamp ON On
CRUISE warning lamp OFF Off
BA W/L Ignition switch
ONIBA OFF indicator lamp ON On
IBA OFF indicator lamp OFF Off
ATC/T-AMT W/L Ignition switch
ONA/T check warning lamp ON On
A/T check warning lamp OFF Off
ATF TEMP W/L Ignition switch
ONNOTE:
This item is displayed, but cannot be moni-
tored.
Off
4WD W/L Ignition switch
ON4WD warning lamp ON On
4WD warning lamp OFF Off
FUEL W/L Ignition switch
ONDuring low fuel warning indication On
Other than the above Off
WASHER W/L Ignition switch
ONDuring low washer flui
d warning indication On
Other than the above Off
AIR PRES W/L Ignition switch
ONLow tire pressure
warning lamp ON On
Low tire pressure warning lamp OFF Off
KEY G/Y W/L Ignition switch
ONKEY warning lamp (Green/Yellow) ON On
KEY warning lamp (Green/Yellow) OFF Off
KEY KNOB W/L Ignition switch
ONNOTE:
This item is displayed, but cannot be moni-
tored.
Off
AFS OFF IND Ignition switch
ONAFS OFF indicator lamp ON On
AFS OFF indicator lamp OFF Off
DDS W/L Ignition switch
ONNOTE:
This item is displayed, but cannot be moni-
tored.
Off
LANE W/L
Ignition switch
ONLane departure warning lamp ON On
Lane departure warning lamp OFF Off
LDP IND Ignition switch
ONLDP ON indicator lamp ON On
LDP ON indicator lamp OFF Off
AT P W / L Ignition switch
ONATP warning lamp ON On
ATP warning lamp OFF Off
Monitor Item Condition Value/Status
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Service Manual
TM-6
< PRECAUTION >[7AT: RE7R01B]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006226734
The Supplemen](/img/42/57033/w960_57033-5093.png "INFINITI QX56 2011 Factory Service Manual
TM-6
< PRECAUTION >[7AT: RE7R01B]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) \"AIR BAG\" and \"SEAT BELT
PRE-TENSIONER\"
INFOID:0000000006226734
The Supplemen")
TM-6
< PRECAUTION >[7AT: RE7R01B]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006226734
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/INFINITI dealer.
Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
General PrecautionsINFOID:0000000006226735
Turn ignition switch OFF an d disconnect the battery cable
from the negative terminal before connecting or disconnect-
ing the A/T assembly connector. Because battery voltage is
applied to TCM even if igniti on switch is turned OFF.
Perform “DTC (Diagnostic Trouble Code) CONFIRMATION
PROCEDURE” after performing each TROUBLE DIAGNOSIS.
If the repair is completed DTC should not be displayed in the
“DTC CONFIRMATION PROCEDURE”.
Always use the specified brand of ATF. Refer to MA-10, "
Fluids
and Lubricants".
Use lint-free paper not cloth rags during work.
Dispose of the waste oil using the methods prescribed by law, ordi-
nance, etc. after replacing the ATF.
Before proceeding with disassembly, thoroughly clean the outside of the transmission. It is important to prevent the internal parts from
becoming contaminated by dirt or other foreign matter.
SEF289H
SEF217U
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PRECAUTIONSTM-7
< PRECAUTION > [7AT: RE7R01B]
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Disassembly should be done in a clean work area.
Use lint-free paper or towels for wiping parts clean. Common shop r](/img/42/57033/w960_57033-5094.png "INFINITI QX56 2011 Factory Service Manual
PRECAUTIONSTM-7
< PRECAUTION > [7AT: RE7R01B]
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Use lint-free paper or towels for wiping parts clean. Common shop r")
PRECAUTIONSTM-7
< PRECAUTION > [7AT: RE7R01B]
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Disassembly should be done in a clean work area.
Use lint-free paper or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the transmission.
Place disassembled parts in order for easier and proper assembly.
All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.
Gaskets, seals and O-rings should be repl aced any time the A/T 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 place during assembly. Never use grease.
Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
When the A/T drain plug is removed, only some of the ATF is drained. Old ATF will remain in torque con- verter and ATF cooling system.
Always follow the procedures under “Changing” when changing ATF. Refer to TM-94, "
Changing".
Occasionally, the parking gear may be locked with the to rque insufficiently released, when stopping the vehi-
cle by shifting the selector lever from “D” or “R” to “P” position with the brake pedal depressed.
In this case, the shock with a thud caused by the abrupt release of torque may occur when shifting the selec-
tor lever from “P” posit ion to other positions.
However, this symptom is not a malfunction which results in the damage of parts.
Service Notice or PrecautionINFOID:0000000006274263
ATF COOLER SERVICE
If ATF contains frictional 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 using
cleaning solvent and compressed air after repair. For A/T fluid cooler cleaning procedure, refer to TM-97,
"Cleaning". For radiator replacement, refer to CO-13, "Exploded View".
Revision: 2010 May2011 QX56
Page 5130 of 5598
![INFINITI QX56 2011 Factory Service Manual
TM-42
< SYSTEM DESCRIPTION >[7AT: RE7R01B]
STRUCTURE AND OPERATION
A/T FLUID COOLER SCHEMATIC
COMPONENT DESCRIPTION
A/T fluid warmer
The A/T fluid warmer (1) is installed on the front part of cylin](/img/42/57033/w960_57033-5129.png "INFINITI QX56 2011 Factory Service Manual
TM-42
< SYSTEM DESCRIPTION >[7AT: RE7R01B]
STRUCTURE AND OPERATION
A/T FLUID COOLER SCHEMATIC
COMPONENT DESCRIPTION
A/T fluid warmer
The A/T fluid warmer (1) is installed on the front part of cylin")
TM-42
< SYSTEM DESCRIPTION >[7AT: RE7R01B]
STRUCTURE AND OPERATION
A/T FLUID COOLER SCHEMATIC
COMPONENT DESCRIPTION
A/T fluid warmer
The A/T fluid warmer (1) is installed on the front part of cylinder
block of engine.
When engine is started while engine and A/T are cold, engine cool-
ant temperature rises more quickly than A/T fluid temperature. A/T
fluid warmer is provided with two circuits for ATF and engine cool-
ant respectively so that warmed engine coolant warms ATF
quickly. This helps shorten A/T warming up time, improving fuel
economy.
A cooling effect is obtained when A/T fluid temperature is high.
A/T fluid cooler (with bypass valve)
A/T fluid cooler (1) is installed in the front of radiator (2) and con- denser (3).
A/T fluid cooler is provided with a bypass valve that controls ATF
flow. Bypass valve operates by thermo wax and a return spring.
Bypass valve fully opens when A/T fluid temperature is approxi-
mately 90 °C (194 °F) and fully closes when A/T fluid temperature is
approximately 100 °C (212 °F).
When A/T fluid temperature is low, the bypass valve is open. Most of ATF therefore returns to the transmission without flowing into the
cooler core that has larger flow resistance.
JSDIA1803GB
JSDIA1811ZZ
JSDIA1814ZZ
JSDIA1815GB
Revision: 2010 May2011 QX56