INFINITI QX56 2011 Factory Service Manual

SE-2
SECOND HEATED SEAT SYSTEM : System De-
scription ..................................................................
16
CLIMATE CONTROLLED SEAT SYSTEM ........... ...17
CLIMATE CONTROLLED SEAT SYSTEM : Sys-
tem Diagram ........................................................ ...
17
CLIMATE CONTROLLED SEAT SYSTEM : Sys-
tem Description .................................................... ...
17
CLIMATE CONTROLLED SEAT SYSTEM : Fail-
safe .........................................................................
17
ECU DIAGNOSIS INFORMATION ..............20
CLIMATE CONTROLLED SEAT CONTROL
UNIT ................................................................ ...
20
Reference Value .................................................. ...20
Fail-safe ..................................................................21
WIRING DIAGRAM .....................................24
POWER SEAT CONTROL SYSTEM (PAS-
SENGER SIDE) ............................................... ...
24
Wiring Diagram .................................................... ...24
LUMBAR SUPPORT SYSTEM ..........................28
Wiring Diagram .................................................... ...28
SECOND SEAT POWER UNLOCK SYSTEM ...33
Wiring Diagram .......................................................33
THIRD SEAT SEATBACK POWER FOLDING
SYSTEM .......................................................... ...
39
Wiring Diagram .................................................... ...39
FRONT HEATED SEAT SYSTEM .....................45
Wiring Diagram .................................................... ...45
SECOND HEATED SEAT SYSTEM ..................50
Wiring Diagram .................................................... ...50
CLIMATE CONTROLLED SEAT SYSTEM .......55
Wiring Diagram .................................................... ...55
BASIC INSPECTION ...................................66
DIAGNOSIS AND REPAIR WORK FLOW ..... ...66
Work Flow ............................................................ ...66
DTC/CIRCUIT DIAGNOSIS ...................... ...67
POWER SUPPLY AND GROUND CIRCUIT .. ...67
CLIMATE CONTROLLED SEAT CONTROL UNIT ...67
CLIMATE CONTROLLED SEAT CONTROL UNIT
: Diagnosis Procedure ............................................
67
CLIMATE CONTROLLED SEAT CONTROL UNIT
: Component Inspection ..........................................
70
CLIMATE CONTROLLED SEAT SWITCH ........72
Component Function Check .............................. ...72
Diagnosis Procedure ..............................................72
Component Inspection ............................................74
SEATBACK THERMAL ELECTRIC UNIT ........75
Component Function Check ............................... ...75
Diagnosis Procedure ...............................................75
SEATBACK THERMAL ELECTRIC UNIT
SENSOR ............................................................
77
Component Function Check ............................... ...77
Diagnosis Procedure ...............................................77
Component Inspection ............................................78
SEAT CUSHION THERMAL ELECTRIC UNIT ...79
Component Function Check ............................... ...79
Diagnosis Procedure ...............................................79
SEAT CUSHION THERMAL ELECTRIC UNIT
SENSOR ............................................................
81
Component Function Check ............................... ...81
Diagnosis Procedure ...............................................81
Component Inspection ............................................82
CLIMATE CONTROLLED SEATBACK
BLOWER MOTOR .............................................
83
Component Function Check ............................... ...83
Diagnosis Procedure ...............................................83
CLIMATE CONTROLLED SEAT CUSHION
BLOWER MOTOR .............................................
86
Component Function Check ............................... ...86
Diagnosis Procedure ...............................................86
CLIMATE CONTROLLED SEAT SWITCH IN-
DICATOR ...........................................................
89
Component Function Check ............................... ...89
Diagnosis Procedure ...............................................89
CLIMATE CONTROLLED SEAT BLOWER
FILTER ...............................................................
91
SEATBACK BLOWER MOTOR ............................. ...91
SEATBACK BLOWER MOTOR : Diagnosis Pro-
cedure .....................................................................
91
SEAT CUSHION BLOWER MOTOR ..................... ...91
SEAT CUSHION BLOWER MOTOR : Diagnosis
Procedure ...............................................................
91
SYMPTOM DIAGNOSIS ............................92
CLIMATE CONTROLLED SEAT DOES NOT
OPERATE. ...................................................... ...
92
Diagnosis Procedure ............................................ ...92
TEMPERATURE ADJUSTMENT IS IMPOSSI-
BLE ....................................................................
94
SEATBACK ............................................................ ...94
SEATBACK : Diagnosis Procedure ........................94
SEAT CUSHION ..................................................... ...94
SEAT CUSHION : Diagnosis Procedure .................94
Revision: 2010 May2011 QX56

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CLIMATE CONTROLLED SEAT ACTIVATES
ONCE BUT STOPS IMMEDIATELY .............. ....
96
SEATBACK BLOWER MOTOR ............................ ....96
SEATBACK BLOWER MOTOR : Description .........96
SEATBACK BLOWER MOTOR : Diagnosis Pro-
cedure .....................................................................
96
SEAT CUSHION BLOWER MOTOR ..................... ....96
SEAT CUSHION BLOWER MOTOR : Description ....96
SEAT CUSHION BLOWER MOTOR : Diagnosis
Procedure ................................................................
96
SEAT SWITCH INDICATOR IS NOT ILLUMI-
NATED IN HEAT OR COOL POSITION ............
98
Diagnosis Procedure ........................................... ....98
SQUEAK AND RATTLE TROUBLE DIAG-
NOSES ...............................................................
99
Work Flow ........................................................... ....99
Inspection Procedure ............................................101
Diagnostic Worksheet ...........................................103
REMOVAL AND INSTALLATION .............105
FRONT SEAT ................................................. ..105
Exploded View .................................................... ..105
Removal and Installation .......................................112
SEATBACK ........................................................... ..114
SEATBACK : Disassembly and Assembly ............114
SEAT CUSHION .................................................... ..115
SEAT CUSHION : Disassembly and Assembly ....116
CLIMATE CONTROLLED SEAT UNIT ................. ..117
CLIMATE CONTROLLED SEAT UNIT : Disas-
sembly and Assembly ...........................................
117
HEADREST (WITH HEADREST DISPLAY ONLY) ..117
HEADREST (WITH HEADREST DISPLAY
ONLY) : Disassembly and Assembly ....................
117
SECOND SEAT ................................................120
Exploded View .................................................... ..120
Removal and Installation ..................................... ..125
SEATBACK ............................................................ ..126
SEATBACK : Disassembly and Assembly ............126
SEAT CUSHION .................................................... ..130
SEAT CUSHION : Disassembly and Assembly .....130
ARMREST .............................................................. ..133
ARMREST : Disassembly and Assembly ..............133
Adjustment .............................................................134
THIRD SEAT ...................................................137
Exploded View .......................................................137
Removal and Installation .......................................138
Disassembly and Assembly ...................................139
POWER SEAT SWITCH .................................141
Removal and Installation .......................................141
SECOND SEAT POWER UNLOCK SWITCH .142
Removal and Installation .......................................142
THIRD SEAT RECLINING SWITCH ...............143
Removal and Installation .......................................143
THIRD SEAT FOLD DOWN SWITCH .............144
Removal and Installation .......................................144
FRONT HEATED SEAT SWITCH ...................145
Removal and Installation .......................................145
SECOND HEATED SEAT SWITCH ................146
Removal and Installation .......................................146
CLIMATE CONTROLLED SEAT SWITCH .....147
Removal and Installation .......................................147
CLIMATE CONTROLLED SEAT BLOWER
FILTER ............................................................
148
SEAT CUSHION .................................................... ..148
SEAT CUSHION : Removal and Installation .........148
SEATBACK ............................................................ ..148
SEATBACK : Removal and Installation .................148
Revision: 2010 May2011 QX56

SE-4
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006237842
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.
Service NoticeINFOID:0000000006217352
 When removing or installing various parts, place a cloth or padding onto the vehicle body to prevent
scratches.
 Handle trim, molding, instruments, grille, etc. carefull y during removing or installing. Be careful not to oil or
damage them.
 Apply sealing compound where necessary when installing parts.
 When applying sealing compound, be careful that t he sealing compound never protrudes from parts.
 When replacing any metal parts (for example body outer panel, members, etc.), always take rust prevention
measures.
Precaution for WorkINFOID:0000000006217353
 When removing or disassembling each component, be careful not to damage or deform it. If a component
may be subject to interference, al ways protect it with a shop cloth.
 When removing (disengaging) components with a screwdriver or similar tool, always wrap the component
with a shop cloth or vinyl tape to protect it.
 Protect the removed parts with a shop cloth and keep them.
 Replace a deformed or damaged clip.
 If a part is specified as a non-reusable part, always replace it with new one.
 Always tighten bolts and nuts securely to the specified torque.
 After reinstallation is complete, always check that each part works normally.
 Follow the steps below to clean components.
- Water soluble foul: Dip a soft cloth into lukewarm water, and wring the water out of the cloth to wipe the fouled area.
Then rub with a soft and dry cloth.
Revision: 2010 May2011 QX56

PRECAUTIONSSE-5
< PRECAUTION >
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- Oily foul: Dip a soft cloth into lukewarm water with mild detergent (concentration: within 2 to 3%), and wipe
the fouled area.
Then dip a cloth into fresh water, and wring the water out of the cloth to wipe the detergent off. Then rub with
a soft and dry cloth.
 Never use organic solvent such as thinner, benzene, alcohol, and gasoline.
 For genuine leather seats, and use a genuine leather seat cleaner.
Revision: 2010 May2011 QX56

SE-6
< PREPARATION >
PREPARATION
PREPARATION
PREPARATION
Commercial Service ToolINFOID:0000000006217354
Tool name Description
Engine ear Locates the noise
Remover tool Removes clips, pawls, and metal clips
Hook and pick tool Removes the snap pins
SIIA0995E
JMKIA3050ZZ
JMJIA0490ZZ
Revision: 2010 May2011 QX56

CLIP LISTSE-7
< PREPARATION >
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CLIP LIST
Clip ListINFOID:0000000006217355
JMJIA3734GB
Revision: 2010 May2011 QX56

SE-8
< SYSTEM DESCRIPTION >
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
POWER SEAT SYSTEM
POWER SEAT SYSTEM : Component Parts LocationINFOID:0000000006217356
POWER SEAT SYSTEM : Component DescriptionINFOID:0000000006217357
LUMBAR SUPPORT SYSTEM
1. Lumber support motor 2. Lifting motor 3. Reclining motor
4. Sliding motor
A. View with seat cushion pad and seat
back pad removed. B. Back side of seat cushion
JMJIA4288ZZ
Item Function
BCM Supplies at all times the power received from battery to power seat switch
Power seat switch Built-in reclining switch, sliding switch and lifting switch, controls the power supplied to each motor
Reclining motor With the power supplied from power seat switch, operates the forward and backward movement
of seatback
Sliding motor With the power supplied from power seat switch, operates the forward and backward slide of seat
Lifting motor With the power supplied from power seat switch, operates the up and down movement of seat
cushion
Revision: 2010 May2011 QX56

COMPONENT PARTSSE-9
< SYSTEM DESCRIPTION >
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LUMBAR SUPPORT SYSTEM : Component Parts LocationINFOID:0000000006217358
LUMBAR SUPPORT SYSTEM : Component DescriptionINFOID:0000000006217359
SECOND SEAT POWER UNLOCK SYSTEM
1. Lumber support motor 2. Lifting motor 3. Reclining motor
4. Sliding motor
A. View with seat cushion pad and seat
back pad removed. B. Back side of seat cushion
JMJIA4288ZZ
Item Function
BCM Supplies at all times the power received from battery to power seat switch
Lumbar support switch Controls the power supplied to lumbar support motor
Lumbar support motor With the power supplied from lumbar support switch, operates the forward and backward
movement of seatback support device
Revision: 2010 May2011 QX56

SE-10
< SYSTEM DESCRIPTION >
COMPONENT PARTS
SECOND SEAT POWER UNLOCK SYST EM : Component Parts Location
INFOID:0000000006217360
SECOND SEAT POWER UNLOCK SYSTEM : Component DescriptionINFOID:0000000006217361
THIRD SEAT SEATBACK POWER FOLDING SYSTEM
1. Power unlock motor RH 2. Power unlock relay RH 3. Second seat power unlock switch RH
4. Second seat power unlock switch LH 5. Power unlock motor LH 6. Power unlock relay LH
A. View with seat cushion pad and seat
back pad removed. B. View with seat cushion pad and seat
back pad removed.
JMJIA4221ZZ
Item Function
Second seat unlock switch supplies power supply to power unlock relay and operates power unlock system. Power unlock relay Supplies battery power supply to motor when receiving power supply from power unlock switch.
Power unlock motor Releases lock when receiving battery power supply from power unlock relay.
Revision: 2010 May2011 QX56

COMPONENT PARTSSE-11
< SYSTEM DESCRIPTION >
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THIRD SEAT SEATBACK POWER FOLDING S YSTEM : Component Parts Location
INFOID:0000000006217362
THIRD SEAT SEATBACK POWER FOLDING SYSTEM : Component Description
INFOID:0000000006217363
1. Leclining switch LH 2. Folding motor LH 3. Up relay 1 LH
4. Up relay 2 LH 5. Down relay 1 LH 6. Down relay 2 LH
7. Fold down switch RH 8. Fold down switch LH 9. Down relay 2 RH
10. Up relay 2 RH 11. Up relay 1 RH 12. Down relay 1 RH
13. Folding motor RH 14. Leclining switch RH
A. View with luggege lower board LH
removed. B. View with luggege lower board RH
removed.
JMJIA4222ZZ
Item Function
Reclining switch supplies power supply to up relay or down relay and operates reclining and folding function of third
seat.
Fall down switch supplies power supply to up relay or down relay and operates reclining and folding function of third
seat.
Folding motor Receives power supply from fold down switch and reclining switch, and operates seatback forward
and backward.
Revision: 2010 May2011 QX56