2011 INFINITI QX56 service

DLK-210
< SYMPTOM DIAGNOSIS >
SQUEAK AND RATTLE TROUBLE DIAGNOSES
If the noise can be duplicated easily during the test drive, to help identify the source of the noise, try to dupli-
cate the noise with the vehicle stopped by doing one or all of the following:
1) Close a door.
2) Tap or push/pull around the area where the noise appears to be coming from.
3) Rev the engine.
4) Use a floor jack to recreate vehicle “twist”.
5) At idle, apply engine load (electrical load, half-cl utch on M/T models, drive position on A/T models).
6) Raise the vehicle on a hoist and hit a tire with a rubber hammer.
 Drive the vehicle and attempt to duplicate the conditions the customer states exist when the noise occurs.
 If it is difficult to duplicate the noise, drive the v ehicle slowly on an undulating or rough road to stress the
vehicle body.
CHECK RELATED SERVICE BULLETINS
After verifying the customer concern or symptom, chec k ASIST for Technical Service Bulletins (TSBs) related
to that concern or symptom.
If a TSB relates to the symptom, follo w the procedure to repair the noise.
LOCATE THE NOISE AND IDENTIFY THE ROOT CAUSE
1. Narrow down the noise to a general area. To help pi npoint the source of the noise, use a listening tool
(Chassis ear: J-39570, Engine ear and mechanics stethoscope).
2. Narrow down the noise to a more specific area and identify the cause of the noise by:
 Removing the components in the area that is are suspected to be the cause of the noise.
Do not use too much force when removing clips and fasteners, otherwise clips and fastener can be broken
or lost during the repair, resulting in the creation of new noise.
 Tapping or pushing/pulling the component that is are suspected to be the cause of the noise.
Do not tap or push/pull the component with excessive force, otherwise the noise will be eliminated only tem-
porarily.
 Feeling for a vibration by hand by touching the component (s) that is are suspected to be the cause of the
noise.
 Placing a piece of paper between components that are suspected to be the cause of the noise.
 Looking for loose components and contact marks. Refer to DLK-211, "
Inspection Procedure".
REPAIR THE CAUSE
 If the cause is a loose component, tighten the component securely.
 If the cause is insufficient clearance between components:
- Separate components by repositioning or loos ening and retightening the component, if possible.
- Insulate components with a suitable insulator such as urethane pads, foam blocks, felt cloth tape or ure-
thane tape. A Nissan Squeak and Rattle Kit (J-43980) is available through the authorized Nissan Parts
Department.
CAUTION:
Never use excessive force as many components are constructed of plastic and may be damaged.
NOTE:
Always check with the Parts Departm ent for the latest parts information.
The following materials are contained in the Nissan Squeak and Rattle Kit (J-43980). Each item can be
ordered separately as needed.
URETHANE PADS [1.5 mm (0.059 in) thick]
Insulates connectors, harness, etc.
76268-9E005: 100 ×135 mm (3.94 ×5.31 in)/76884-71L01: 60 ×85 mm (2.36 ×3.35 in)/76884-
71L02:15 ×25 mm (0.59 ×0.98 in)
INSULATOR (Foam blocks)
Insulates components from contact. Can be used to fill space behind a panel.
73982-9E000: 45 mm (1.77 in) thick, 50 ×50 mm (1.97 ×1.97 in)/73982-
50Y00: 10 mm (0.39 in) thick, 50 ×50 mm (1.97 ×1.97 in)
INSULATOR (Light foam block)
80845-71L00: 30 mm (1.18 in) thick, 30 ×50 mm (1.18 ×1.97in)
FELT CLOTHTAPE
Used to insulate where movement does not occu r. Ideal for instrument panel applications.
68370-4B000: 15 ×25 mm (0.59 ×0.98 in) pad/68239-13E00: 5 mm (0.20 in) wide tape roll
The following materials, not found in the kit, can also be used to repair squeaks and rattles.
UHMW (TEFLON) TAPE
Revision: 2010 May2011 QX56

DLK-262
< REMOVAL AND INSTALLATION >
AUTOMATIC BACK DOOR CONTROL MODULE
AUTOMATIC BACK DOOR CONTROL MODULE
Removal and InstallationINFOID:0000000006226129
REMOVAL
1. Remove the luggage side finisher lower LHD. Refer to INT-36, "LUGGAGE SIDE LOWER FINISHER :
Removal and Installation".
2. Remove the automatic back door control unit bra cket mounting bolt and nats, and then remove the auto-
matic back door control unit bracket.
3. Remove the automatic back door control unit m ounting bolt, and then remove the automatic back door
control unit.
INSTALLATION
Install in the reverse order of removal.
NOTE:
After installing back door control unit, perform additional service when replace control unit. Refer to DLK-80,
"ADDITIONAL SERVICE WHEN REPLACING (AUTOMATIC BACK DOOR CONTROL MODULE) : Work Pro-
cedure".
Revision: 2010 May2011 QX56

DLN-1
TRANSMISSION & DRIVELINE
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CONTENTS
DRIVELINE
TRANSFER: ATX90A
PRECAUTION ................ ...............................
6
PRECAUTIONS .............................................. .....6
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
6
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
6
Service Notice or Precautions for Transfer ...............7
PREPARATION ............................................8
PREPARATION .............................................. .....8
Special Service Tools .......................................... ......8
Commercial Service Tools ........................................8
SYSTEM DESCRIPTION .............................10
COMPONENT PARTS ................................... ....10
Component Parts Location .................................. ....10
Component Description ...........................................11
Transfer Control Unit ...............................................11
Transfer Control Actuator ........................................11
Transfer Hi-Lo Position Sensor ...............................12
Transfer Rotary Position Sensor .............................12
Transfer Lock Position Sensor ................................12
Transfer Fluid Temperature Sensor ........................12
STRUCTURE AND OPERATION .......................13
Sectional View ..................................................... ....13
Torque Split Mechanism .........................................13
SYSTEM .............................................................18
4WD SYSTEM ...........................................................18
4WD SYSTEM : System De scription ......................18
4WD SYSTEM : Fail-Safe ......................... ..............20
DIAGNOSIS SYSTEM (TRANSFER CON-
TROL UNIT) .................................................... ....
21
CONSULT-III Function ........................................ ....21
ECU DIAGNOSIS INFORMATION ..............24
TRANSFER CONTROL UNIT ...........................24
Reference Value .................................................. ....24
Fail-Safe ..................................................................28
DTC Inspection Priority Chart ..................................29
DTC Index ...............................................................29
WIRING DIAGRAM ......................................31
4WD SYSTEM .. ................................ .................31
Wiring Diagram .................................................... ....31
BASIC INSPECTION ...................................38
DIAGNOSIS AND REPAIR WORK FLOW .......38
Work Flow ............................................................ ....38
Diagnostic Work Sheet ............................................39
ADDITIONAL SERVICE WHEN REPLACING
TRANSFER CONTROL UNIT ...........................
41
Description ...............................................................41
Work Procedure .......................................................41
ADDITIONAL SERVICE WHEN REPLACING
TRANSFER ASSEMBLY ..................................
42
Description ...............................................................42
Work Procedure .......................................................42
TRANSFER LOCK POSITION SENSOR
LEARNING ....................................... .................
44
Description ........................................................... ....44
Work Procedure .......................................................44
TRANSFER ROTARY POSITION SENSOR
LEARNING ....................................... .................
46
Description ........................................................... ....46
Work Procedure .......................................................46
TRANSFER FLUID VISCOSITY LEARNING ....47
Description ...............................................................47
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U1000 CAN COMM CIRCUIT ......................... ....91
Description .......................................................... ....91
DTC Logic ...............................................................91
Diagnosis Procedure ...............................................91
U1010 CONTROL UNIT (CAN) ..........................92
Description .......................................................... ....92
DTC Logic ...............................................................92
Diagnosis Procedure ...............................................92
POWER SUPPLY AND GROUND CIRCUIT ......93
Description .......................................................... ....93
Diagnosis Procedure ...............................................93
4WD WARNING LAMP ......................................97
Component Function Check ................................ ....97
Diagnosis Procedure ...............................................97
4WD INDICATOR LAMP ....................................98
Component Function Check ................................ ....98
Diagnosis Procedure ...............................................98
SYMPTOM DIAGNOSIS ..............................99
HEAVY TIGHT-CORNER BRAKING SYMP-
TOM OCCURS . .............................................. ....
99
Description .......................................................... ....99
Diagnosis Procedure ...............................................99
4WD MODE DOES NOT CHANGE ..................100
Description .......................................................... ..100
Diagnosis Procedure .............................................100
4WD MODE INDICATOR LAMP CONTINUES
BLINKING .........................................................
101
Description .......................................................... ..101
Diagnosis Procedure .............................................101
4WD WARNING LAMP BLINKS QUICKLY .....102
Description .......................................................... ..102
4WD WARNING LAMP BLINKS SLOWLY .....103
Description .......................................................... ..103
Diagnosis Procedure .............................................103
INFORMATION DISPLAY IS NOT DIS-
PLAYED ...........................................................
104
Description .......................................................... ..104
Diagnosis Procedure .............................................104
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ..........................
105
NVH Troubleshooting Chart ................................ ..105
PERIODIC MAINTENANCE .......................106
TRANSFER FLUID ......................................... ..106
Inspection ............................................................ ..106
Draining .................................................................106
Refilling .................................................................106
REMOVAL AND INSTALLATION .............107
TRANSFER CONTROL UNIT .........................107
Removal and Installation ..................................... ..107
4WD MODE SWITCH ......................................108
Removal and Installation .......................................108
FRONT OIL SEAL ...........................................109
Exploded View .......................................................109
Removal and Installation .......................................109
REAR OIL SEAL .............................................111
Exploded View .......................................................111
Removal and Installation .......................................111
Adjustment .............................................................112
TRANSFER CONTROL ACTUATOR .............114
Exploded View .......................................................114
Removal and Installation .......................................114
Inspection ..............................................................114
TRANSFER HI-LO POSITION SENSOR ........116
Exploded View .......................................................116
Removal and Installation .......................................116
Inspection ..............................................................116
TRANSFER ROTARY POSITION SENSOR ...117
Exploded View .......................................................117
Removal and Installation .......................................117
Inspection ..............................................................118
TRANSFER LOCK POSITION SENSOR ........119
Exploded View .......................................................119
Removal and Installation .......................................119
Inspection ..............................................................119
TRANSFER FLUID TEMPERATURE SEN-
SOR .................................................................
120
Exploded View .......................................................120
Removal and Installation .......................................120
Inspection ..............................................................120
UNIT REMOVAL AND INSTALLATION ....121
TRANSFER ASSEMBLY ................................121
Exploded View ..................................................... ..121
Removal and Installation .......................................121
INPUT OIL SEAL ............................................123
Exploded View .......................................................123
Removal and Installation .......................................123
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... ...........................................
124
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
124
General Specifications ......................................... ..124
FRONT PROPELLER SHAFT: 2F P15
PREPARATION ........ .................................
125
PREPARATION ...............................................125
Revision: 2010 May2011 QX56

DLN-4
Commercial Service Tools .....................................125
SYMPTOM DIAGNOSIS ............................126
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
126
NVH Troubleshooting Chart ................................ ..126
PERIODIC MAINTENANCE ..................... ..127
FRONT PROPELLER SHAFT ........................ .127
Inspection ............................................................ ..127
REMOVAL AND INSTALLATION ..............128
FRONT PROPELLER SHAFT ........................ .128
Exploded View ..................................................... ..128
Removal and Installation .......................................129
Disassembly and Assembly ...................................129
Inspection ..............................................................131
SERVICE DATA AND SPECIFICATIONS
(SDS) .............. ............................................
133
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... .
133
General Specification .......................................... ..133
Propeller Shaft Runout ..........................................133
Journal Axial Play ..................................................133
REAR PROPELLER SHAFT: 2F P26
SYMPTOM DIAGNOSIS .. ..........................
134
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
134
NVH Troubleshooting Chart ................................ ..134
PERIODIC MAINTENANCE ..................... ..135
REAR PROPELLER SHAFT .......................... .135
Inspection ............................................................ ..135
REMOVAL AND INSTALLATION ..............136
REAR PROPELLER SHAFT .......................... .136
Exploded View ..................................................... ..136
Removal and Installation .......................................137
Disassembly and Assembly ...................................137
Inspection ..............................................................139
SERVICE DATA AND SPECIFICATIONS
(SDS) .............. ............................................
140
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... .
140
General Specification .......................................... ..140
Propeller Shaft Runout ..........................................140
Journal Axial Play ..................................................140
REAR PROPELLER SHAFT: 2S1410
SYMPTOM DIAGNOSIS .. ..........................
141
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... ..
141
NVH Troubleshooting Chart ................................. .141
PERIODIC MAINTENANCE ......................142
REAR PROPELLER SHAFT .......................... ..142
Inspection ............................................................. .142
REMOVAL AND INSTALLATION .............143
REAR PROPELLER SHAFT .......................... ..143
Exploded View ..................................................... .143
Removal and Installation .......................................144
Disassembly and Assembly ..................................144
Inspection ..............................................................146
SERVICE DATA AND SPECIFICATIONS
(SDS) ........ .................................................
147
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ..
147
General Specification ........................................... .147
Propeller Shaft Runout ..........................................147
Journal Axial Play .................................................147
FRONT FINAL DRIVE: R180A
PRECAUTION ............... ............................
148
PRECAUTIONS .............................................. ..148
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect ................................ .
148
Precaution for Servicing Front Final Drive ............148
PREPARATION .........................................149
PREPARATION .............................................. ..149
Special Service Tool ............................................ .149
Commercial Service Tool ......................................151
SYSTEM DESCRIPTION ..........................153
STRUCTURE AND OPERATION ................... ..153
Sectional View ..................................................... .153
SYMPTOM DIAGNOSIS ...........................154
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... ..
154
NVH Troubleshooting Chart ................................. .154
PERIODIC MAINTENANCE ......................155
FRONT DIFFERENTIAL GEAR OIL .............. ..155
Inspection ............................................................. .155
Draining .................................................................155
Refilling .................................................................155
REMOVAL AND INSTALLATION .............156
FRONT OIL SEAL .......................................... ..156
Exploded View ..................................................... .156
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Removal and Installation .....................................
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156
SIDE OIL SEAL ................................................160
Exploded View .................................................... ..160
Removal and Installation .......................................160
UNIT REMOVAL AND INSTALLATION ....162
FRONT FINAL DRIVE ASSEMBLY ............... ..162
Exploded View .................................................... ..162
Removal and Installation .......................................162
UNIT DISASSEMBLY AND ASSEMBLY ..164
SIDE SHAFT ................................................... ..164
Exploded View .................................................... ..164
Disassembly ..........................................................165
Assembly ...............................................................166
Inspection ..............................................................166
DIFFERENTIAL ASSEMBLY ...........................167
Exploded View .................................................... ..167
Disassembly ..........................................................168
Assembly ...............................................................169
Adjustment ............................................................171
Inspection ..............................................................174
DRIVE PINION ..................................................176
Exploded View .................................................... ..176
Disassembly ..........................................................177
Assembly ...............................................................179
Adjustment ............................................................181
Inspection ..............................................................184
SERVICE DATA AND SPECIFICATIONS
(SDS) ......... ................................. ................
185
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ..
185
General Specifications ........................................ ..185
Drive Gear Runout ................................................185
Preload Torque .....................................................185
Backlash ................................................................185
Companion Flange Runout ...................................185
REAR FINAL DRIVE: R230
PRECAUTION ................ ............................
186
PRECAUTIONS .............................................. ..186
Service Notice or Precautions for Rear Final Drive ..186
PREPARATION .........................................187
PREPARATION .............................................. ..187
Special Service Tool ........................................... ..187
Commercial Service Tool ......................................189
SYSTEM DESCRIPTION ...........................191
STRUCTURE AND OPERATION ...................191
Sectional View ..................................................... ..191
SYMPTOM DIAGNOSIS ............................192
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING .........................
192
NVH Troubleshooting Chart ................................ ..192
PERIODIC MAINTENANCE ......................193
REAR DIFFERENTIAL GEAR OIL .................193
Inspection ............................................................ ..193
Draining .................................................................193
Refilling ..................................................................193
REMOVAL AND INSTALLATION .............194
FRONT OIL SEAL ...........................................194
Exploded View ..................................................... ..194
Removal and Installation .......................................194
SIDE OIL SEAL ...............................................199
Exploded View .......................................................199
Removal and Installation .......................................199
UNIT REMOVAL AND INSTALLATION ....201
REAR FINAL DRIVE .......................................201
Exploded View ..................................................... ..201
Removal and Installation .......................................201
UNIT DISASSEMBLY AND ASSEMBLY ..203
DIFFERENTIAL ASSEMBLY ..........................203
Exploded View ..................................................... ..203
Disassembly ..........................................................204
Assembly ...............................................................206
Adjustment .............................................................210
Inspection ..............................................................215
DRIVE PINION ................................................216
Exploded View .......................................................216
Disassembly ..........................................................217
Assembly ...............................................................218
Adjustment .............................................................220
Inspection ..............................................................220
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... ...........................................
222
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
222
General Specification .......................................... ..222
Drive Gear Runout .................................................222
Side Gear Clearance .............................................222
Preload Torque ......................................................222
Backlash ................................................................222
Companion Flange Runout ....................................222
Revision: 2010 May2011 QX56

DLN-6
< PRECAUTION >[TRANSFER: ATX90A]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006222209
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.
Precaution Necessary for Steering W heel Rotation after Battery Disconnect
INFOID:0000000006222210
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect bot h battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the bat tery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock wi ll remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
Revision: 2010 May2011 QX56

PRECAUTIONSDLN-7
< PRECAUTION > [TRANSFER: ATX90A]
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5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)
6. Perform self-diagnosis check of a ll control units using CONSULT-III.
Service Notice or Precautions for TransferINFOID:0000000006222211
CAUTION:
 Use Genuine NISSAN Transfer Fluid. Refer to MA-10, "
Fluids and Lubricants".
 Never reuse transfer fluid, once it has been drained.
 Check the fluid level or repl ace the fluid only with the vehicle parked on level ground.
 During removal or installati on, keep inside of transfer clear of dust or dirt.
 Replace all tires at the same time. Always use tir es of the proper size and the same brand and pat-
tern. Fitting improper size and unusually worn tires applies excessive force to vehicle mechanism
and can cause longitudinal vibration.
 Disassembly should be done in a clean work area, it is preferable to work in dustproof area.
 Before proceeding with disassembly, thoroughly clean the transfer. It is important to prevent the
internal parts from becoming contamin ated by dirt or other foreign matter.
 All parts should be carefully cl eaned with a general purpose, non-flammable solvent before inspec-
tion or reassembly.
 Check for the correct installation status prior to removal or disassembly. If matching marks are
required, be certain they do not interfere wit h the function of the parts when applied.
 Check appearance of the disassembled parts for damage, deformation, and unusual wear. Replace
them with a new ones if necessary.
 Gaskets, seals and O-rings should be replaced any time the transfer is disassembled.
 In principle, tighten bolts or nu ts gradually in several steps workin g diagonally from inside to out-
side. If tightening sequence is specified, use it.
 Observe the specified torque when assembling.
 Clean and flush the parts su fficiently and blow-dry them.
 Be careful not to damage sliding surfaces and mating surfaces.
 Clean inner parts with lint-free cloth or towels . Do not use cotton work gloves and rags to prevent
adhering fibers.
Revision: 2010 May2011 QX56