2011 INFINITI QX56 Eco

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QUICK REFERENCE INDEX
AGENERAL INFORMATIONGIGeneral Information
BENGINEEMEngine Mechanical
LUEngine Lubrication System
COEngine Cooling System
ECEngine Control System
FLFuel System
EXExhaust System
STRStarting System
ACCAccelerator Control System
CHYBRIDHBCHybrid Control System
HBBHybrid Battery System
HBRHybrid Brake System
DTRANSMISSION & DRIVE-
LINECLClutch
TMTransaxle & Transmission
DLNDriveline
FAXFront Axle
RAXRear Axle
ESUSPENSIONFSUFront Suspension
RSURear Suspension
SCSSuspension Control System
WTRoad Wheels & Tires
FBRAKESBRBrake System
PBParking Brake System
BRCBrake Control System
GSTEERINGSTSteering System
STCSteering Control System
HRESTRAINTSSBSeat Belt
SBCSeat Belt Control System
SRSRS Airbag
SRCSRS Airbag Control System
IVENTILATION, HEATER &
AIR CONDITIONERVTLVentilation System
HAHeater & Air Conditioning System
HACHeater & Air Conditioning Control System
JBODY INTERIORINTInterior
IPInstrument Panel
SESeat
ADPAutomatic Drive Positioner
KBODY EXTERIOR,
DOORS, ROOF & VEHICLE
SECURITYDLKDoor & Lock
SECSecurity Control System
GWGlass & Window System
PWCPower Window Control System
RFRoof
HDHood
EXTExterior
BRMBody Repair
LDRIVER CONTROLSMIRMirrors
EXLExterior Lighting System
INLInterior Lighting System
WWWiper & Washer
DEFDefogger
HRNHorn
MELECTRICAL & POWER
CONTROLPWOPower Outlet
BCSBody Control System
LANLAN System
PCSPower Control System
CHGCharging System
PGPower Supply, Ground & Circuit Elements
NDRIVER INFORMATION &
MULTIMEDIAMWIMeter, Warning Lamp & Indicator
WCSWarning Chime System
SNSonar System
AVAudio, Visual & Navigation System
OCRUISE CONTROL &
DRIVER ASSISTANCECCSCruise Control System
DASDriver Assistance System
DMSDrive Mode System
PMAINTENANCEMAMaintenance
All rights reserved. No part
of this Service Manual may
be reproduced or stored in a
retrieval system, or transmit-
ted in any form, or by any
means, electronic, mechani-
cal, recording or otherwise,
without the prior written per-
mission of NISSAN MOTOR
CO., LTD.
Edition: May 2010
Publication No. SM1E-1Z62U0

FOREWORD
This manual contains maintenance and repair procedure for the 2011
INFINITI QX56.
In order to assure your safety and the efficient functioning of the vehicle,
this manual should be read thoroughly. It is especially important that the
PRECAUTIONS in the GI section be completely understood before starting
any repair task.
All information in this manual is based on the latest product information
at the time of publication. The right is reserved to make changes in specifi-
cations and methods at any time without notice.
IMPORTANT SAFETY NOTICE
The proper performance of service is essential for both the safety of
the technician and the efficient functioning of the vehicle.
The service methods in this Service Manual are described in such a
manner that the service may be performed safely and accurately.
Service varies with the procedures used, the skills of the technician
and the tools and parts available. Accordingly, anyone using service
procedures, tools or parts which are not specifically recommended
by NISSAN must first be completely satisfied that neither personal
safety nor the vehicle’s safety will be jeopardized by the service
method selected.

COMPONENT PARTSADP-7
< SYSTEM DESCRIPTION >
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Component DescriptionINFOID:0000000006248302
7. ABS actuator and electric unit (con- trol unit)
Refer to BRC-10, "
Component Parts
Location" (With VDC) or BRC-142,
"Component Parts Location" (With
BRAKE ASSIST) or BRC-149,
"Component Parts Location" (With
INTELLIGENT BRAKE ASSIST) 8. Door mirror remote
control switch 9. Seat memory switch
10. Sliding, lifting switch 11. Reclining switch 12. Driver side door switch
13. Door mirror (driver side) 14. T ilt motor 15. Telescopic motor
16. Automatic drive positioner control unit 17. Lifting motor (rear) 18.
Diver seat control unit
19. Lifting motor (front) 20. Sliding motor 21. Reclining motor
A. View with steering column cover low- er removed B. View with instrument lower panel LH
removed C. View with seat cushion pad and seat
back pad removed
D. Backside of seat cushion E. View with seat cushion pad and seat back pad removed
Component parts Description
Driver seat control unit  Main units of automatic drive positioner system.
 It is connected to the CAN.
 It communicates with automatic drive positioner control unit via
UART communication.
 It perform memory function after receiving the door unlock signal
from BCM.
 The address of each part is recorded.
 Operates each motor of seat to the registered position.
 Requests the operation of steering column and door mirror to automatic drive positioner control unit
 Operates the specific seat motor with the signal from power seat
switch.
 Transmits the ignition switch signal (ACC/ON) via UART com- munication to automatic driver positioner control unit.
Automatic drive positioner control unit  It communicates with driver seat control unit via UART commu-
nication.
 Perform various controls with the instructions of driver seat con- trol unit.
 Perform the controls of tilt & telescopic, door mirror and seat memory switch.
 Operates steering column and door mirror with the signal from the driver seat control
BCM Recognizes the following status and transmits it to driver seat con-
trol unit via CAN communication.
 Handle position: LHD
 Driver door: OPEN/CLOSE
 Ignition switch position: ACC/ON
 Steering lock unit status: LOCK/UNLOCK
 Door lock: UNLOCK (with Intelligent key or driver side door re-
quest switch operation)
Key ID
 Starter: CRANKING/OTHER
IPDM E/R ON/OFF signal of A/T shift selector (detention switch) is transmit-
ted to driver seat control unit via CAN communication.
TCM The following signals are transmitted to driver seat control unit via
CAN communication.
 Shift position signal (P range)
 Identification of transmission: A/T
Unified meter and A/C amp. Transmit the vehicle speed signal to driver seat control unit via
CAN communication.
Revision: 2010 May2011 QX56

ADP-12
< SYSTEM DESCRIPTION >
SYSTEM
NOTE:
The lumbar support system are controlled independently with no link to the automatic drive positioner system.
Refer to SE-16, "
LUMBAR SUPPORT SYSTEM : System Description".
Sleep control
Driver seat control unit equips sleep control for reducing power consumption.
The system switches to sleep control when al l of the following conditions are satisfied.
 Ignition switch is OFF (steering lock status).
 All devices of auto driving pos ition system are not operating.
 45 seconds timer of driver s eat control unit is not operating.
 Set switch and memory switch (1 and 2) are OFF.
Wake-up control
Sleep control releases when detecting status change in either of the following item.
 CAN communication
 Power seat switch
 Set switch and seat memory switch (1 and 2)
 Tilt & telescopic switch
MANUAL FUNCTION
Function Description
Manual function The driving position (seat, steering column and door mirror position) can be adjusted
by using the power seat switch, tilt & telescopic switch or door mirror remote control
switch.
Memory function The seat, steering column and door mirror move to the stored driving position by
pressing seat memory switch (1 or 2).
Entry/Exit assist function Exit On exit, the seat moves backward and the steering column moves upward.
Entry
On entry, the seat and steering column returns from exiting position to the previous
driving position.
Intelligent Key interlock function Perform memory operation, exiting operation and entry operation by Intelligent Key
unlock operation or driver side door request switch unlock operation.
Revision: 2010 May2011 QX56

ADP-16
< SYSTEM DESCRIPTION >
SYSTEM
3. Push desired memory switch.
4. Driver seat, steering and door mirror will move to the memorized position.
OPERATION CONDITION
Satisfy all of the following items. The memory function is not performed if these items are not satisfied.
* : When timer function does not operate.
DETAIL FLOW
TIMER FUNCTION
 The memory function can be performed for 45 seconds after opening the driver door even if the ignition
switch position is in OFF position.
 Satisfy all of the following items. The timer functi on is not performed if these items are not satisfied.
Item Request status
Ignition position ON
*
Switch inputs
 Power seat switch
 Tilt & telescopic switch
 Door mirror control switch
 Set switch
 Memory switchOFF
(Not operated)
A/T shift selector P position
Memory function Registered
Vehicle speed 0 Km/h (0 MPH)
CONSULT-III Not connected
Order Input Output Control unit condition
1 Memory switch — The memory switch signal is inputted to the driver seat control unit
when memory switch 1 or 2 is operated.
2— Motors
(Seat, Steering,
door mirror)Driver seat control unit operates each motor of seat when it recogniz-
es the memory switch pressed for 0.5 second or more and requests
each motor operation to automatic drive positioner control unit via
UART communication. The automatic drive positioner control unit op-
erates each motor.
Memory switch Indica-
tor Driver seat control unit requests the flashing of memory indicator
while either of the motors is operating. The driver seat control unit il-
luminates the memory indicator.
3 Sensors
(Seat, steering col-
umn, door mirror) —Driver seat control unit judges the operating seat position with each
seat sensor input. The positions of the steering column and outside
mirror are monitored with each sensor signal. Driver seat control unit
stops the operation of each motor when each part reaches the record-
ed address.
4— Memory switch Indica-
torDriver seat control unit requests the illumination of memory indicator
after all motors stop. The driver seat control unit illuminates the mem-
ory indicator for 5 seconds.
Item Request status
Ignition position OFF
Set switch/memory switch OFF
Memory function Registered
A/T shift selector P position
Steering lock unit status LOCK
Driver side door switch OFF
CUNSULT-III Not connected
Revision: 2010 May2011 QX56

ADP-18
< SYSTEM DESCRIPTION >
SYSTEM
DETAIL FLOW
ENTRY ASSIST FUNCTION
ENTRY ASSIST FUNCTION : System DiagramINFOID:0000000006248311
ENTRY ASSIST FUNCTION : System DescriptionINFOID:0000000006248312
The seat is in the exiting position when following condition is satisfied, the seat returns from exiting position to
the previous driving position.
NOTE:
 This function is set to ON before delivery (initial setting).
 Further information for the system setting procedure. Refer to ADP-54, "
SYSTEM SETTING : Description".
OPERATION PROCEDURE
1. Turn ignition switch ACC.
Transmission A/T
CUNSULT-III Not connected
Item Request status
Order Input Output Control unit condition
1 Door switch
(Driver side)
—Driver seat control unit receives door switch signal (driver side/
open) from BCM via CAN communication.
2— Motors
(Sliding, tilt)Driver seat control unit operates the seat sliding motor, which recog-
nizes that the driver side door is opened with ignition switch OFF.
Driver seat control unit then requests the operations of tilt motor to
auto drive positioner control unit via UART communication. The au-
tomatic drive positioner control unit operates each motor for a con-
stant amount.
3 Sensor
(Sliding, tilt) —Each sensor monitors the operating positions of seat and steering,
and then stops the operation of each motor when each part reaches
the recorded address.
JMJIA3777GB
Revision: 2010 May2011 QX56

SYSTEMADP-19
< SYSTEM DESCRIPTION >
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2. Driver seat and steering column will return from the exiting position to entry position.
OPERATION CONDITION
Satisfy all of the following items. The entry assist f unction is not performed if these items are not satisfied.
DETAIL FLOW
INTELLIGENT KEY INTERLOCK FUNCTION
Item Request status
Seat, steering column The vehicle is not moved after performing the
exit assist function.
Switch inputs
 Power seat switch
 Tilt & telescopic switch
 Door mirror control switch
 Set switch
 Memory switch OFF
(Not operated)
Vehicle speed 0 Km/h (0 MPH)
Sta rte r OFF
Transmission A/T
CONSULT-III Not connected
Order Input Output Control unit condition
1 Ignition switch — Driver seat control unit receives the signals of [ignition switch signal]
from BCM via CAN communication.
2— Motors
(Sliding, tilt)Driver side control unit operates the sliding motor when the operating
conditions are satisfied and requests the operations of tilt motor to
automatic drive positioner control unit via UART communication. The
automatic drive positioner operates each motor.
3 Sensors
(Sliding, tilt) —Each sensor monitors the operating positions of seat and steering,
and then stops the operation of each motor when each part reaches
the recorded address.
Revision: 2010 May2011 QX56

ADP-20
< SYSTEM DESCRIPTION >
SYSTEM
INTELLIGENT KEY INTERLOCK FUNCTION : System Diagram
INFOID:0000000006248313
INTELLIGENT KEY INTERLOCK F UNCTION : System DescriptionINFOID:0000000006248314
 By associating Intelligent Key and automatic drive po sitioner system, the unlock operation of Intelligent Key
or driver side door request switch performs me mory function and entry/exit assist function.
 Registration of Intelligent Key interlock function can regist er a different key ID to the driver seat control unit,
one by one, for memory switch 1 and 2. A total of 2 key IDs can be registered.
 When ignition switch is OFF (steering lock unit status ), and door unlock operation is performed using Intelli-
gent Key or driver side door request swit ch, driver seat automatically adjusts to a driving position other than
seat sliding. Seat sliding and steering column tilt perform return operation and are set to standby status.
 In standby status, when ignition switch is operated from OFF to ACC, return operation sets seat sliding and
steering column tilt to a registered position.
NOTE:
 When another key ID is newly registered to a key switch to which a key ID is already registered, the previ-
ously registered key ID is overwritten and becomes unusable.
 When starter signal turns ON during return operation, the operation is interrupted, starter signal turns from
ON to OFF, and operation restarts.
OPERATION PROCEDURE
1. Unlock driver door by Intelligent Key or driver side door request switch.
2. Operation other than memory functi on of seat sliding is performed. Seat sliding and steering column tilt
perform exit assist operation.
3. Turn ignition switch ACC.
4. Driver seat and steering column will return from the exiting position to entry position.
NOTE:
Further information for Intelligent Key interlock function. Refer to ADP-54, "
INTELLIGENT KEY INTERLOCK
STORING : Description".
OPERATION CONDITION
Satisfy all of the following items. The Intelligent Key interlock function is not performed if these items are not
satisfied.
JMJIA3778GB
Revision: 2010 May2011 QX56