transmission fluid INFINITI QX56 2011 Factory Owner's Manual

PERIODIC MAINTENANCEMA-7
< PERIODIC MAINTENANCE >
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NOTE:
(1) After 60,000 miles (96,000 km) or 48 months, inspect every 15,000 miles (24,000 km) or 12 months. Replace the drive belts i
f found
damaged or if the auto belt tensioner reading reaches the maximum limit.
(2) If operating mainly in dusty conditions, more frequent maintenance may be required.
(3) Maintenance-free item. For service procedures, refer to FL section.
(4) First replacement interval is 105,000 miles (168,000 km) or 84 months. After first replacement, replace every 75,000 miles (120,000
km) or 60 months. Use only Genu ine NISSAN Long Life Antifreeze/Coo lant (blue) or equivalent with proper mixture ratio of 50% anti-
freeze and 50% demineralized or distilled water. Mixing any other type of coolant or the use of non-distilled water will reduce the life
expectancy of the factory-fill coolant.
(5) Periodic maintenance is not required. However, if valve noise increases, inspect valve clearance.
* Maintenance items and intervals with “*” are recommended by INFINITI for reliable vehicle operation. The owner need not perfo rm
such maintenance in order to maintain the emission warranty or manufacturer recall liability. Other maintenance items and inter vals are
required.
CHASSIS AND BODY
Abbreviations: R = Replace. I = Inspec t. Correct or replace if necessary.
Fuel filter NOTE (3) —
Engine coolant* NOTE (4) MA-13
Engine oil R R R R R R R RMA-17
Engine oil filter (Use genuine
NISSAN engine oil filter or
equivalent.)R R RRRRRR
MA-18
Spark plugs (Iridium-tipped
type)Replace every 105,000 miles (168,000 km).
MA-19
Intake & exhaust valve clear-
ance*NOTE (5)
EM-12
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference
Section -
Page or -
Content Title
Perform at number of miles,
kilometers or months, which-
ever comes first. Miles x 1,000
(km x 1,000)
Months 33.75
(54)
27 37.5
(60)
30 41.25
(66)
33 45
(72)
36 48.75
(78)
39 52.5
(84)
42 56.25
(90)
45 60
(96)
48
MAINTENANCE OPERATION MAINTENANCE INTERVAL
Reference
Section -
Page or - Con- tent Title
Perform at number of miles,
kilometers or months,
whichever comes first. Miles x 1,000
(km x 1,000)
Months 3.75
(6)
3 7.50
(12)
6 11 . 2 5
(18)
9 15
(24)
12 18.75
(30)
15 22.5
(36)
18 26.25
(42)
21 30
(48)
24
Brake lines & cables I I MA-28
Brake fluid R RMA-28
Brake pads & rotors I I I IMA-30
BR-16
BR-18
BR-16
BR-18
Transfer fluid & differential
gear oil
NOTE (1) I I MA-21MA-24
MA-25
Automatic transmission flu-
id
NOTE (2)
—
Steering gear & linkage,
axle & suspension parts IIII
MA-31
MA-32
Tire rotation NOTE (3) MA-4WT-63
Drive shaft boots and pro-
peller shaft (4WD models) IIII MA-33MA-22
MA-23
MA-23
Revision: 2010 May2011 QX56

MA-8
< PERIODIC MAINTENANCE >
PERIODIC MAINTENANCE
NOTE:
(1) If towing a trailer, using a camper or a car-top carrier, or driving on rough or muddy roads, change (not just inspect) fluid /oil at every
30,000 miles (48,000 km) or 24 months.
(2) Automatic transmission fluid is maintenance-free.
(3) Refer to “Tire rotation” unde r the “General maintenance” heading earlier in this section.
Schedule 2INFOID:0000000006287731
EMISSION CONTROL SYSTEM
Abbreviations: R = Replace. I = Inspec t. Correct or replace if necessary. [ ]: At the mileage intervals only
Exhaust system I I I I MA-21
In-cabin microfilter R RVTL-17
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference
Section -
Page or - Con- tent Title
Perform at number of miles,
kilometers or months,
whichever comes first. Miles x 1,000
(km x 1,000)
Months 3.75
(6)
3 7.50
(12)
6 11 . 2 5
(18)
9 15
(24)
12 18.75
(30)
15 22.5
(36)
18 26.25
(42)
21 30
(48)
24
MAINTENANCE OPERATION MAINTENANCE INTERVAL
Reference
Section - Page
or - Content Title
Perform at number of miles,
kilometers or months,
whichever comes first. Miles x 1,000
(km x 1,000) Months 33.75
(54)27 37.5
(60) 30 41.25
(66)33 45
(72) 36 48.75
(78)39 52.5
(84) 42 56.25
(90)45 60
(96) 48
Brake lines & cables I I MA-28
Brake fluid R RMA-28
Brake pads & rotors I I I IMA-30
BR-16
BR-18
BR-16
BR-18
Transfer fluid & differential
gear oil
NOTE (1) I I MA-21MA-24
MA-25
Automatic transmission flu-
id
NOTE (2)
—
Steering gear & linkage,
axle & suspension parts IIII
MA-31
MA-32
Tire rotation NOTE (3) MA-4WT-63
Drive shaft boots and pro-
peller shaft (4WD models)IIII MA-33MA-22
MA-23
MA-23
Exhaust system I I I I
MA-21
In-cabin microfilter R RVTL-17
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference Sec-
tion - Page or -
Content Title
Perform at number of miles, kilo-
meters or months, whichever
comes first. Miles x 1,000
(km x 1,000)
Months 7.5
(12)
6 15
(24)
12 22.5
(36)
18 30
(48)
24 37.5
(60)
30 45
(72)
36 52.5
(84)
42 60
(96)
48
Drive belts NOTE (1) I* MA-12
Air cleaner filter [R] [R]MA-17
EVAP vapor lines I* I*MA-20
Fuel lines I* I*MA-17
Fuel filter NOTE (2) —
Engine coolant* NOTE (3) MA-13
Revision: 2010 May2011 QX56

PERIODIC MAINTENANCEMA-9
< PERIODIC MAINTENANCE >
C
DE
F
G H
I
J
K L
M B
MA
N
O A
NOTE:
(1) After 60,000 miles (96,000 km) or 48 months, inspect every 15,000 miles (24,000 km) or 12 months. Replace the drive belts i
f found
damaged or if the auto belt tensioner reading reaches the maximum limit.
(2) Maintenance-free item. For service procedures, refer to FL section.
(3) First replacement interval is 105,000 miles (168,000 km) or 84 months. After first replacement, replace every 75,000 miles (120,000
km) or 60 months. Use only Genu ine NISSAN Long Life Antifreeze/Coo lant (blue) or equivalent with proper mixture ratio of 50% anti-
freeze and 50% demineralized or distilled water. Mixing any other type of coolant or the use of non-distilled water will reduce the life
expectancy of the factory-fill coolant.
(4) Periodic maintenance is not required. However, if valve noise increases, inspect valve clearance.
* Maintenance items and intervals with “*” are recommended by INFINITI for reliable vehicle operation. The owner need not perfo rm
such maintenance in order to maintain the emission warranty or manufacturer recall liability. Other maintenance items and inter vals are
required.
CHASSIS AND BODY
Abbreviations: R = Replace. I = Inspec t. Correct or replace if necessary.
NOTE:
(1) Automatic transmission fluid is maintenance-free.
(2) Refer to “Tire rotation” under the “General maintenance” heading earlier in this section.
Engine oil R R R R R R R R
MA-17
Engine oil filter (Use genuine
NISSAN engine oil filter or equiv-
alent.)RRRR R RRR
MA-18
Spark plugs (Iridium-tipped type) Replace every 105,000 miles (168,000 km). MA-19
Intake & exhaust valve clear-
ance*NOTE (4)
EM-12
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference Sec-
tion - Page or -
Content Title
Perform at number of miles, kilo-
meters or months, whichever
comes first. Miles x 1,000
(km x 1,000)
Months 7.5
(12)
6 15
(24)
12 22.5
(36)
18 30
(48)
24 37.5
(60)
30 45
(72)
36 52.5
(84)
42 60
(96)
48
MAINTENANCE OPERATION MAINTENANCE INTERVAL
Reference Sec-
tion - Page or - Content Title
Perform at number of miles, kilo-
meters or months, whichever
comes first. Miles x 1,000
(km x 1,000) Months 7.5
(12) 6 15
(24) 12 22.5
(36) 18 30
(48) 24 37.5
(60) 30 45
(72) 36 52.5
(84) 42 60
(96) 48
Brake lines & cables I I I I MA-28
Brake fluid R RMA-28
Brake pads & rotors I I I IMA-30
BR-16
BR-18
BR-16
BR-18
Transfer fluid & differential gear
oil
IIIIMA-21MA-24
MA-25
Automatic transmission fluid NOTE (1)
—
Steering gear & linkage, axle &
suspension parts II
MA-31
MA-32
Tire rotation NOTE (2) MA-4WT-63
Drive shaft boots and propeller
shaft (4WD models) IIIIMA-33MA-22
MA-23
MA-23
Exhaust system I I
MA-21
In-cabin microfilter R R R RVTL-17
Revision: 2010 May2011 QX56

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)
Revision: 2010 May2011 QX56

TM-1
TRANSMISSION & DRIVELINE
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SECTION TM
A
B
TM
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CONTENTS
TRANSAXLE & TRANSMISSION
7AT: RE7R01B
PRECAUTION ................ ...............................
6
PRECAUTIONS .............................................. .....6
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
6
General Precautions .................................................6
Service Notice or Precaution .....................................7
PREPARATION ............................................8
PREPARATION .............................................. .....8
Special Service Tool ........................................... ......8
Commercial Service Tool ..........................................9
SYSTEM DESCRIPTION .............................10
COMPONENT PARTS ................................... ....10
A/T CONTROL SYSTEM ...........................................10
A/T CONTROL SYSTEM : Component Parts Lo-
cation ................................................................... ....
10
A/T CONTROL SYSTEM : Component Descrip-
tion ...................................................................... ....
11
A/T CONTROL SYSTEM : TCM .............................12
A/T CONTROL SYSTEM : Transmission Range
Switch .................................................................. ....
12
A/T CONTROL SYSTEM : Input Speed Sensor .....12
A/T CONTROL SYSTEM : Output Speed Sensor ....12
A/T CONTROL SYSTEM : A/ T Fluid Temperature
Sensor ................................................................. ....
12
A/T CONTROL SYSTEM : Input Clutch Solenoid
Valve ................................................................... ....
12
A/T CONTROL SYSTEM : Front Brake Solenoid
Valve ................................................................... ....
12
A/T CONTROL SYSTEM : Direct Clutch Solenoid
Valve ................................................................... ....
12
A/T CONTROL SYSTEM : High and Low Reverse
Clutch Solenoid Valve ......................................... ....
13
A/T CONTROL SYSTEM : Low Brake Solenoid
Valve .................................................................... ....
13
A/T CONTROL SYSTEM : Anti-interlock Solenoid
Valve ........................................................................
13
A/T CONTROL SYSTEM : 2346 Brake Solenoid
Valve ........................................................................
13
A/T CONTROL SYSTEM : Torque Converter
Clutch Solenoid Valve ......................................... ....
13
A/T CONTROL SYSTEM : Line Pressure Solenoid
Valve .................................................................... ....
13
A/T CONTROL SYSTEM : Accelerator Pedal Po-
sition Sensor ........................................................ ....
13
A/T CONTROL SYSTEM : Manual Mode Switch ....13
A/T CONTROL SYSTEM : To w Mode Switch .........14
A/T CONTROL SYSTEM : A/T CHECK Indicator
Lamp .................................................................... ....
14
A/T CONTROL SYSTEM : Tow Mode Indicator
Lamp .................................................................... ....
14
A/T CONTROL SYSTEM : Selector Lever Position
Indicator ............................................................... ....
14
A/T SHIFT LOCK SYSTEM ................................... ....14
A/T SHIFT LOCK SYSTEM : Component Parts
Location ...................................................................
15
A/T SHIFT LOCK SYSTEM : Component Descrip-
tion ...........................................................................
15
STRUCTURE AND OPERATION .....................16
TRANSMISSION .................................................... ....16
TRANSMISSION : Cross-Sectional View ................16
TRANSMISSION : System Diagram ........................18
TRANSMISSION : System Description ...................18
TRANSMISSION : Component Description .............41
FLUID COOLER & FLUID WARMER SYSTEM .... ....41
FLUID COOLER & FLUID WARMER SYSTEM :
System Description ..................................................
41
SYSTEM ............................................................44
A/T CONTROL SYSTEM ....................................... ....44
Revision: 2010 May2011 QX56

TM-2
A/T CONTROL SYSTEM : System Diagram ..........44
A/T CONTROL SYSTEM : System Description ......44
A/T CONTROL SYSTEM : Fail-Safe ......................45
A/T CONTROL SYSTEM : Protection Control ..... ...47
LINE PRESSURE CONTROL ................................ ...48
LINE PRESSURE CONTROL : System Diagram ...48
LINE PRESSURE CONTROL : System Descrip-
tion ....................................................................... ...
48
SHIFT CHANGE CONTROL .................................. ...49
SHIFT CHANGE CONTROL : System Diagram .....50
SHIFT CHANGE CONTROL : System Description
...
50
SHIFT PATTERN CONTROL ................................. ...53
SHIFT PATTERN CONTROL : System Diagram ...54
SHIFT PATTERN CONTROL : System Descrip-
tion ..........................................................................
54
LOCK-UP CONTROL ............................................. ...56
LOCK-UP CONTROL : System Diagram ................56
LOCK-UP CONTROL : System Description ...........56
A/T SHIFT LOCK SYSTEM .......................................57
A/T SHIFT LOCK SYSTEM : System Description ...58
ON BOARD DIAGNOSTIC (OBD) SYSTEM .....60
Diagnosis Description .......................................... ...60
DIAGNOSIS SYSTEM (TCM) ............................61
CONSULT-III Function (TRANSMISSION) .......... ...61
ECU DIAGNOSIS INFORMATION ..............68
TCM ................................................................. ...68
Reference Value .................................................. ...68
Fail-Safe .................................................................74
Protection Control ...................................................76
DTC Inspection Priority Chart .................................77
DTC Index ..............................................................78
WIRING DIAGRAM .....................................80
A/T CONTROL SYSTEM ................................ ...80
Wiring Diagram .................................................... ...80
A/T SHIFT LOCK SYSTEM ...............................85
Wiring Diagram .................................................... ...85
BASIC INSPECTION ...................................88
DIAGNOSIS AND REPAIR WORK FLOW ..... ...88
Diagnosis Flow .................................................... ...88
Question sheet .......................................................89
ADDITIONAL SERVICE WHEN REPLACING
TRANSMISSION ASSEMBLY ...........................
91
Description ........................................................... ...91
Special Repair Requirement ...................................91
ADDITIONAL SERVICE WHEN REPLACING
CONTROL VALVE & TCM ................................
92
Description ........................................................... ...92
Special Repair Requirement ...................................92
CALIBRATION OF DECEL G SENSOR ...........93
Description ........................................................... ...93
Special Repair Requirement ...................................93
A/T FLUID ..........................................................94
Changing .............................................................. ...94
Adjustment ..............................................................95
A/T FLUID COOLER .........................................97
Cleaning ............................................................... ...97
Inspection ................................................................99
STALL TEST ....................................................100
Inspection and Judgment ..................................... .100
A/T POSITION ..................................................101
Inspection ............................................................. .101
Adjustment ............................................................101
DTC/CIRCUIT DIAGNOSIS .......................102
U0300 CAN COMMUNICATION DATA ......... ..102
Description ........................................................... .102
DTC Logic .............................................................102
Diagnosis Procedure .............................................102
U1000 CAN COMM CIRCUIT ...........................103
Description ........................................................... .103
DTC Logic .............................................................103
Diagnosis Procedure .............................................103
P0615 STARTER RELAY .................................104
Description ........................................................... .104
DTC Logic .............................................................104
Diagnosis Procedure .............................................104
P0705 TRANSMISSION RANGE SWITCH A ..106
DTC Logic .............................................................106
Diagnosis Procedure .............................................106
P0710 TRANSMISSION FLUID TEMPERA-
TURE SENSOR A .............................................
107
DTC Logic ............................................................ .107
Diagnosis Procedure .............................................107
P0717 INPUT SPEED SENSOR A ...................109
DTC Logic ............................................................ .109
Diagnosis Procedure .............................................109
P0720 OUTPUT SPEED SENSOR ...................110
DTC Logic ............................................................ .110
Diagnosis Procedure .............................................110
P0725 ENGINE SPEED ....................................112
Description ........................................................... .112
DTC Logic .............................................................112
Diagnosis Procedure .............................................112
P0729 6GR INCORRECT RATIO .....................114
Revision: 2010 May2011 QX56

TM-4
Component Inspection (Shift Lock Solenoid) ........159
SELECTOR LEVER POSITION INDICATOR ..161
Component Function Check ................................ ..161
Diagnosis Procedure .............................................161
Component Inspection (Selector Lever Position
Indicator) ................................................................
163
SYMPTOM DIAGNOSIS ............................165
SYSTEM SYMPTOM ...................................... .165
Symptom Table ................................................... ..165
PERIODIC MAINTENANCE ..................... ..175
A/T FLUID ....................................................... .175
Inspection ............................................................ ..175
REMOVAL AND INSTALLATION ..............176
A/T SHIFT SELECTOR ................................... .176
Exploded View ..................................................... ..176
Removal and Installation .......................................176
Inspection and Adjustment ....................................177
CONTROL CABLE ..........................................178
Exploded View ..................................................... ..178
Removal and Installation .......................................178
Inspection and Adjustment ....................................179
SELECTOR LEVER POSITION INDICATOR ..180
Removal and Installation ..................................... ..180
TOW MODE SWITCH ......................................181
Removal and Installation ..................................... ..181
CONTROL VALVE & TCM ..............................182
Exploded View ..................................................... ..182
Removal and Installation .......................................182
Inspection and Adjustment ....................................186
PARKING COMPONENTS ..............................187
2WD ........................................................................ ..187
2WD : Exploded View ............................................187
2WD : Removal and Installation ............................187
2WD : Inspection ...................................................190
REAR OIL SEAL ..............................................192
2WD ........................................................................ ..192
2WD : Exploded View ............................................192
2WD : Removal and Installation ............................192
2WD : Inspection ...................................................193
4WD ........................................................................ ..193
4WD : Exploded View ............................................193
4WD : Removal and Installation ............................193
4WD : Inspection and Adjustment .........................194
OUTPUT SPEED SENSOR .............................195
2WD ........................................................................ ..195
2WD : Exploded View ...........................................195
2WD : Removal and Installation ............................195
2WD : Inspection and Adjustment .........................198
AIR BREATHER HOSE ....................................199
2WD ........................................................................ .199
2WD : Exploded View ...........................................199
2WD : Removal and Installation ............................199
4WD ........................................................................ .200
4WD : Exploded View ...........................................200
4WD : Removal and Installation ............................200
FLUID COOLER SYSTEM ...............................202
Exploded View ..................................................... .202
Removal and Installation .......................................202
Inspection and Adjustment ....................................204
UNIT REMOVAL AND INSTALLATION ...205
TRANSMISSION ASSEMBLY ..........................205
2WD ........................................................................ .205
2WD : Exploded View ...........................................205
2WD : Removal and Installation ............................205
2WD : Inspection and Adjustment .........................207
4WD ........................................................................ .207
4WD : Exploded View ...........................................208
4WD : Removal and Installation ............................208
4WD : Inspection and Adjustment .........................210
UNIT DISASSEMBLY AND ASSEMBLY ..211
TRANSMISSION ASSEMBLY ..........................211
Exploded View ..................................................... .211
Oil Channel ...........................................................222
Location of Needle Bearings and Bearing Races .222
Location of Snap Rings .........................................225
Disassembly ..........................................................226
Assembly ..............................................................243
Inspection ..............................................................267
OIL PUMP, 2346 BRAKE, FRONT BRAKE
PISTON .............................................................
270
Exploded View ..................................................... .270
Disassembly ..........................................................270
Assembly ..............................................................274
Inspection and Adjustment ....................................277
UNDER DRIVE CARRIER, FRONT BRAKE
HUB ..................................................................
279
Exploded View ..................................................... .279
Disassembly ..........................................................279
Assembly ..............................................................280
Inspection ..............................................................280
FRONT CARRIER, INPUT CLUTCH, REAR
INTERNAL GEAR .............................................
282
Exploded View ..................................................... .282
Disassembly ..........................................................283
Revision: 2010 May2011 QX56

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
Revision: 2010 May2011 QX56

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

COMPONENT PARTSTM-11
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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NOTE:
The following components are included in the control valve & TCM (17).
TCM
 Input speed sensor 1, 2
 A/T fluid temperature sensor
 Transmission range switch
 Direct clutch solenoid valve
 High and low reverse clutch solenoid valve
 Input clutch solenoid valve
 Front brake solenoid valve
 Low brake solenoid valve
 Anti-interlock solenoid valve
 2346 brake solenoid valve
 Line pressure solenoid valve
 Torque converter clutch solenoid valve
A/T CONTROL SYSTEM : Component DescriptionINFOID:0000000006226739
Name Function
TCM TM-12, "
A/T CONTROL SYSTEM : TCM"
Transmission range switchTM-12, "A/T CONTROL SYSTEM : Transmission Range Switch"
Output speed sensor TM-12, "A/T CONTROL SYSTEM : Output Speed Sensor"
Input speed sensor 1
TM-12, "A/T CONTROL SYSTEM : Input Speed Sensor"Input speed sensor 2
A/T fluid temperature sensorTM-12, "
A/T CONTROL SYSTEM : A/T Fluid Temperature Sensor"
Input clutch solenoid valve TM-12, "A/T CONTROL SYSTEM : Input Clutch Solenoid Valve"
Front brake solenoid valve TM-12, "A/T CONTROL SYSTEM : Front Brake Solenoid Valve"
Direct clutch solenoid valveTM-12, "A/T CONTROL SYSTEM : Direct Clutch Solenoid Valve"
High and low reverse clutch solenoid valveTM-13, "A/T CONTROL SYSTEM : High and Low Reverse Clutch Solenoid Valve"
Low brake solenoid valve TM-13, "A/T CONTROL SYSTEM : Low Brake Solenoid Valve"
Anti-interlock solenoid valve TM-13, "A/T CONTROL SYSTEM : Anti-interlock Solenoid Valve"
2346 brake solenoid valve TM-13, "A/T CONTROL SYSTEM : 2346 Brake Solenoid Valve"
Torque converter clutch solenoid valveTM-13, "A/T CONTROL SYSTEM : Torque Converter Clutch Solenoid Valve"
Line pressure solenoid valve TM-13, "A/T CONTROL SYSTEM : Line Pressure Solenoid Valve"
Accelerator pedal position sensor TM-13, "A/T CONTROL SYSTEM : Accelerator Pedal Position Sensor"
Manual mode switch TM-13, "A/T CONTROL SYSTEM : Manual Mode Switch"
Tow mode switch TM-14, "A/T CONTROL SYSTEM : Tow Mode Switch"
A/T CHECK indicator lampTM-14, "A/T CONTROL SYSTEM : A/T CHECK Indicator Lamp"
Tow mode indicator lamp* TM-14, "A/T CONTROL SYSTEM : Tow Mode Indicator Lamp"
Selector lever position indicator TM-14, "A/T CONTROL SYSTEM : Selector Lever Position Indicator"
Stop lamp switch BRC-15, "Stop Lamp Switch"
Yaw rate/side G sensorBRC-15, "Yaw Rate/Side/Decel G sensor"
Starter relay STR-6, "System Description"
ECMEC-35, "ENGINE CONTROL SYSTEM : System Description"
BCM BCS-6, "BODY CONTROL SYSTEM : System Description"
Combination meter MWI-9, "METER SYSTEM : System Description"
ABS actuator and electric unit (control unit) BRC-16, "System Description"
Revision: 2010 May2011 QX56