steering INFINITI QX56 2011 Factory Service Manual

VTL-12
< REMOVAL AND INSTALLATION >
DUCT AND GRILLE
Install in the reverse order of removal.
REAR FLOOR GRILLE
REAR FLOOR GRILLE : Removal and InstallationINFOID:0000000006276298
REMOVAL
Disengage fixing metal clips, and then remove rear floor grille.
INSTALLATION
Install in the reverse order of removal.
FOOT DUCT
FOOT DUCT : Removal and InstallationINFOID:0000000006276299
REMOVAL
1. Remove steering member. Refer to HA-42, "HEATER & COOLING UNIT ASSEMBLY : Removal and
Installation".
2. Remove fixing screws, and then remove foot duct.
INSTALLATION
Install in the reverse order of removal.
FOOT GRILLE
FOOT GRILLE : Removal and InstallationINFOID:0000000006276300
REMOVAL
Driver side
1. Remove instrument lower panel RH. Refer to IP-14, "Removal and Installation".
2. Remove fixing screws, and then remove foot grille.
Passenger side
1. Remove instrument lower cover. Refer to IP-14, "Removal and Installation".
2. Remove fixing screws and clip, and then remove foot grille.
INSTALLATION
Install in the reverse order of removal.
REAR VENTILATOR DUCT LOWER
REAR VENTILATOR DUCT LOWER : Removal and InstallationINFOID:0000000006276301
REMOVAL
1. Remove luggage side lower finisher RH. Refer to INT-36, "LUGGAGE SIDE LOWER FINISHER :
Removal and Installation".
2. Remove mounting bolts, and then remove rear ventilator duct lower.
INSTALLATION
Install in the reverse order of removal.
REAR VENTILATOR DUCT UPPER
REAR VENTILATOR DUCT UPPER : Removal and InstallationINFOID:0000000006276302
REMOVAL
1. Remove back pillar garnish RH. Refer to INT-37, "BACK PILLAR GARNISH : Removal and Installation".
2. Remove mounting bolt, and then remove rear ventilator grille upper.
INSTALLATION
Install in the reverse order of removal.
Revision: 2010 May2011 QX56

VTL-14
< REMOVAL AND INSTALLATION >
BLOWER UNIT
BLOWER UNIT
Exploded ViewINFOID:0000000006276305
REMOVAL
DISASSEMBLY
1. Heater & cooling unit assembly 2. Steering member 3. Instrument stay LH
4. Instrument stay RH 5. Blower unit assembly
Refer to GI-4, "
Components" for symbols in the figure.
JMIIA0628GB
Revision: 2010 May2011 QX56

WCS-20
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
BUZZER
BUZZER : CONSULT-III Function (BCM - BUZZER)INFOID:0000000006222687
CONSULT-III APPLICATION ITEMS
DATA MONITOR
CONSULT screen item Indication/Unit Description
Vehicle Speed km/h Vehicle speed of the moment a particular DTC is detected
Odo/Trip Meter km Total mileage (Odometer value) of the moment a particular DTC is detected
Vehicle Condition SLEEP>LOCK
Power position status of
the moment a particular
DTC is detected While turning BCM status from low power consumption mode to
normal mode (Power supply position is “LOCK”)
SLEEP>OFF While turning BCM status from low power consumption mode to
normal mode (Power supply position is “OFF”.)
LOCK>ACC While turning power supply position from “LOCK” to “ACC”
ACC>ON While turning power supply position from “ACC” to “IGN”
RUN>ACC While turning power supp
ly position from “RUN” to “ACC” (Vehicle
is stopping and selector lever is except P position.)
CRANK>RUN While turning power su
pply position from “CRANKING” to “RUN”
(From cranking up the engine to run it)
RUN>URGENT While turning power supply positi
on from “RUN“ to “ACC” (Emer-
gency stop operation)
ACC>OFF While turning power supply position from “ACC” to “OFF”
OFF>LOCK While turning power supply position from “OFF” to “LOCK”
OFF>ACC While turning power supply position from “OFF” to “ACC”
ON>CRANK While turning power supply position from “IGN” to “CRANKING”
OFF>SLEEP While turning BCM status from normal mode (Power supply posi-
tion is “OFF”.) to low power consumption mode
LOCK>SLEEP While turning BCM status from normal mode (Power supply posi-
tion is “LOCK”.) to low power consumption mode
LOCK Power supply position is “LOCK”
(Ignition switch OFF with steer-
ing is locked.)
OFF Power supply position is “OFF” (Ignition switch OFF with steering
is unlocked.)
ACC Power supply position is “ACC” (Ignition switch ACC)
ON Power supply position is “IGN” (Ignition switch ON with engine
stopped)
ENGINE RUN Power supply position is “RUN” (Ignition switch ON with engine
running)
CRANKING Power supply position is “CRANKING” (At engine cranking)
IGN Counter 0 - 39 The number of times that ignition switch is turned ON after DTC is detected
 The number is 0 when a malfunction is detected now.
 The number increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition
whenever ignition switch OFF → ON.
 The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.
Test item Diagnosis mode Description
BUZZER Data Monitor Displays BCM input data in real time.
Active Test Operation of electrical loads can be checked by sending driving signal to them.
Revision: 2010 May2011 QX56

WCS-24
< ECU DIAGNOSIS INFORMATION >
COMBINATION METER
DCA INDIgnition switch
ONNOTE:
This item is displayed, but cannot be moni-
tored.
Off
CHECK SUS IND Ignition switch
ONCK SUSP indicator lamp ON On
CK SUSP indicator lamp OFF Off
LCD Ignition switch
ON
During engine start in
formation indication B&P I
Ignition switch
ACC During engine start information indication B&P N
Ignition switch
LOCK During key ID warning indication ID NG
Ignition switch
LOCK During steering lock information indication ROTAT
Ignition switch
LOCK During P position warning indication SFT P
Ignition switch
LOCK During Intelligent Key insert information in-
dication
INSRT
Ignition switch
LOCK During Intelligent Key low battery warning
indication
BATT
Ignition switch
ON During take away warning indication NO KY
Ignition switch
LOCK During key warnin
g indication OUTKY
Ignition switch
ON During ACC warning indication LK WN
ACC TARGET Ignition switch
ONDuring vehicle ahead detection indicator in-
dication
On
Other than the above Off
ACC DISTANCE Ignition switch
ONWhen following distance set to “LONG” LONG
When following distance set to “MIDDLE” MID
When following distance set to “SHORT” SHORT
Set distance indicator not displayed Off
ACC OWN VHL Ignition switch
ONDuring own vehicle indicator indication On
Other than the above Off
ACC SET SPEED Ignition switch
ONDuring set vehicle speed indicator not dis-
played
Off
During set vehicle speed indicator dis-
played Indicates the set vehicle speed
ACC UNIT Ignition switch
ONSet vehicle speed indicator unit display ON On
Set vehicle speed indicator unit display OFF Off
Monitor Item Condition Value/Status
Revision: 2010 May2011 QX56

WT-1
SUSPENSION
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SECTION WT
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O PCONTENTS
ROAD WHEELS & TIRES
PRECAUTION ................ ...............................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
3
Service Notice or Precautions for TPMS ...................4
Service Notice or Precautions for Road Wheel .........4
PREPARATION ............................................5
PREPARATION .............................................. .....5
Special Service Tools .......................................... ......5
Commercial Service Tools ........................................5
SYSTEM DESCRIPTION ..............................6
COMPONENT PARTS ................................... .....6
Component Parts Location .................................. ......6
Component Description .............................................7
Low Tire Pressure Warning Control Unit ...................7
Transmitter ................................................................7
Tire Pressure Receiver .............................................8
Low Tire Pressure Warning Lamp .............................8
SYSTEM ..............................................................9
System Description ............................................. ......9
Tire Inflation Indicator Function ...............................10
DIAGNOSIS SYSTEM (LOW TIRE PRES-
SURE WARNING CONTROL UNIT) ..................
12
CONSULT-III Function ........................................ ....12
ECU DIAGNOSIS INFORMATION ..............14
LOW TIRE PRESSURE WARNING CON-
TROL UNIT ..................................................... ....
14
Reference Value ................................................. ....14
DTC Inspection Priority Chart .................................17
DTC Index ...............................................................18
WIRING DIAGRAM ......................................19
TIRE PRESSURE MONITORING SYSTEM ......19
Wiring Diagram .................................................... ....19
BASIC INSPECTION ...................................25
DIAGNOSIS AND REPAIR WORK FLOW .......25
Work Flow ............................................................ ....25
ADDITIONAL SERVICE WHEN REPLACING
LOW TIRE PRESSURE WARNING CON-
TROL UNIT ........................................................
27
Description ...............................................................27
Work Procedure .......................................................27
TRANSMITTER WAKE UP OPERATION .........28
Description ...............................................................28
Work Procedure .......................................................28
ID REGISTRATION ...........................................29
Description ...............................................................29
Work Procedure .......................................................29
DTC/CIRCUIT DIAGNOSIS .........................31
C1704, C1705, C1706, C1707 LOW TIRE
PRESSURE .......................................................
31
DTC Logic ............................................................ ....31
Diagnosis Procedure ...............................................31
C1708, C1709, C1710, C1711 TRANSMITTER
(NO DATA) ........................................................
33
DTC Logic ............................................................ ....33
Diagnosis Procedure ...............................................33
C1716, C1717, C1718, C1719 TRANSMITTER
(PRESSURE DATA) ..........................................
37
DTC Logic ............................................................ ....37
Diagnosis Procedure ...............................................37
C1728 RECEIVER ID ........................................39
Revision: 2010 May2011 QX56

PRECAUTIONSWT-3
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006256474
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 whether 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 inoper ative, which could increase the risk of personal injury or death in
the event of a collision that would result in air ba g inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipm ent 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 minutes before performing any service.
Precaution Necessary for Steering Wh eel Rotation after Battery Disconnect
INFOID:0000000006256475
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect both 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 batte ry 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 wil l 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

WT-4
< PRECAUTION >
PRECAUTIONS
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 igniti on switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
Service Notice or Precautions for TPMSINFOID:0000000006225485
 Low tire pressure warning lamp blinks for 1min, then turns ON when occurring any malfunction except low tire pressure. Erase the self-diagnosis memories for low tire pressure warning control unit, or register the ID
to turn low tire pressure warning lamp OFF. For ID registration, refer to WT-29, "
Work Procedure".
 ID registration is required when replacing or rotating wheel s, replacing transmitter or low tire pressure warn-
ing control unit. Refer to WT-29, "
Work Procedure".
 Replace grommet seal, valve core and cap of transmitter in TPMS, when replacing each tire by reaching the
wear limit. Refer to WT-66, "
Exploded View".
 For tire inflation indicator function, refer to the following.
- When inflating the tires, park the vehicle in the safe area and ensure the safety of the working area.
- Read and understand the tire inflation indicator function prior to use.
- Inflate the tires one at a time.
- If there is no response for approximately 15 seconds or mo re after inflating the tires, cancel the use of the
tire inflation indicator function or move the vehicle approximately 1 m (3.2 ft) backward or forward to try
again. The air filler pressure may be weak or out of service area.
- Despite the high-precision TPMS pressure sensor, an i ndicated value may differ from that of the pressure
gauge.
- Air pressure is measured rather high due to the rise in tire air temperature after driving.
- If TPMS is malfunctioning, the tire inflation indicator is unusable.
Service Notice or Precautions for Road WheelINFOID:0000000006225486
 Genuine NISSAN aluminum wheel is designed for each type of vehicle. Use it on the specified vehicle only.
 Use Genuine NISSAN parts for the wheel nuts.
 Always use them after adjusting the wheel balance. For the balance weights, use Genuine NISSAN alumi-
num wheel weights.
 Use caution when handling the aluminum wheels, because they can be easily scratched. When removing
dirt, do not use any abrasives, a wire brush, or other it ems that may scratch the coating. Use a neutral deter-
gent if a detergent is needed.
 After driving on roads scattered with anti-ici ng salts, wash off the wheels completely.
 When installing road wheels onto the vehicle, always wipe of f any dirt or foreign substances to prevent them
from being trapped between the contact surfaces of wheel.
 Never apply oil to nut and bolt threads.
Revision: 2010 May2011 QX56

ADDITIONAL SERVICE WHEN REPLACING LOW TIRE PRESSURE WARNING
CONTROL UNIT
WT-27
< BASIC INSPECTION >
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ADDITIONAL SERVICE WHEN RE PLACING LOW TIRE PRESSURE
WARNING CONTROL UNIT
DescriptionINFOID:0000000006225502
When replacing low tire pressure warning contro l unit, transmitter ID registration is required.
Work ProcedureINFOID:0000000006225503
ADJUST THE NEUTRAL POSITION OF STEERING ANGLE SENSOR
1.PERFORM TRANSMITTER ID REGISTRATION
Perform transmitter ID registration.
>> Refer to WT-29, "
Work Procedure".
Revision: 2010 May2011 QX56

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGWT-61
< SYMPTOM DIAGNOSIS >
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NOISE, VIBRATION AND HARSHN ESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000006225544
Use the chart below to find the cause of the symp tom. If necessary, repair or replace these parts.
×: ApplicableReference
WT-64, "
Exploded View
"
WT-64, "
Inspection
"
WT-62, "
Adjustment
"
WT-69, "
Tire Air Pressure
"
WT-64, "
Inspection
"
—
—
WT-69, "
Tire Air Pressure
"
NVH in DLN section.
NVH in DLN section.
NVH in FAX and FSU sections.
NVH in RAX and RSU sections.
Refer to TIRES in this chart.
Refer to ROAD WHEEL in this chart.
NVH in FAX, RAX section.
NVH in BR section.
NVH in ST section.
Possible cause and SUSPECTED PARTS
Improper installation, looseness
Out-of-round
Unbalance
Incorrect tire pressure
Uneven tire wear
Deformation or damage
Non-uniformity
Incorrect tire size
PROPELLER SHAFT
DIFFERENTIAL
FRONT AXLE AND FRONT SUSPENSION
REAR AXLE AND REAR SUSPENSION
TIRES
ROAD WHEELS
DRIVE SHAFT
BRAKE
STEERING
Symptom TIRESNoise
××××××× ×××× ××××
Shake ×××××× ×× ×× ××××
Vibration ×××××××
Shimmy ×××××××× ×× × ××
Judder ×
××××× × ×× × ××
Poor quality ride or
handling ×××××× × × ××
ROAD
WHEEL Noise
××× × ××××× ×××
Shake ××× × × ××× ×××
Shimmy, Judder ××× × ××× ××
Poor quality ride or
handling ××× × ×××
Revision: 2010 May2011 QX56

WW-1
DRIVER CONTROLS
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SECTION WW
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WW
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CONTENTS
WIPER & WASHER
PRECAUTION ................ ...............................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
3
Precaution for Procedure without Cowl Top Cover ......4
SYSTEM DESCRIPTION ..............................5
COMPONENT PARTS ................................... .....5
Component Parts Location .................................. ......5
Component Description ............................................6
Washer Switch ..........................................................6
SYSTEM ..............................................................7
FRONT WIPER AND WASHER SYSTEM ............. ......7
FRONT WIPER AND WASHER SYSTEM : Sys-
tem Diagram ..............................................................
7
FRONT WIPER AND WASHER SYSTEM : Sys-
tem Description .........................................................
7
FRONT WIPER AND WASHER SYSTEM : Fail-
safe ...........................................................................
9
REAR WIPER AND WASHER SYSTEM ............... ....10
REAR WIPER AND WASHER SYSTEM : System
Diagram ...................................................................
10
REAR WIPER AND WASHER SYSTEM : System
Description ..............................................................
10
REAR WIPER AND WASHER SYSTEM :
Fail Safe .................................................................
12
HEADLAMP WASHER SYSTEM .......................... ....12
HEADLAMP WASHER SYSTEM : System Dia-
gram ........................................................................
13
HEADLAMP WASHER SYSTEM : System De-
scription ...................................................................
13
DIAGNOSIS SYSTEM (BCM) ............................14
COMMON ITEM ..................................................... ....14
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
14
WIPER .................................................................... ....15
WIPER : CONSULT-III Function (BCM - WIPER) ....15
DIAGNOSIS SYSTEM (IPDM E/R) ...................18
Diagnosis Description ..............................................18
CONSULT-III Function (IPDM E/R) .........................20
ECU DIAGNOSIS INFORMATION ..............23
BCM, IPDM E/R .................................................23
List of ECU Reference ......................................... ....23
WIRING DIAGRAM ......................................24
WIPER AND WASHER SYSTEM .....................24
Wiring Diagram .................................................... ....24
BASIC INSPECTION ...................................33
DIAGNOSIS AND REPAIR WORKFLOW ........33
Work Flow ............................................................ ....33
DTC/CIRCUIT DIAGNOSIS .........................35
WIPER AND WASHER FUSE ...........................35
Diagnosis Procedure ........................................... ....35
FRONT WIPER MOTOR LO CIRCUIT ..............36
Component Function Check ....................................36
Diagnosis Procedure ...............................................36
FRONT WIPER MOTOR HI CIRCUIT ...............37
Component Function Check ....................................37
Diagnosis Procedure ...............................................37
FRONT WIPER AUTO STOP SIGNAL CIR-
CUIT ..................................................................
38
Component Function Check ....................................38
Diagnosis Procedure ...............................................38
Revision: 2010 May2011 QX56