2011 INFINITI QX56 ECU

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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

ACCELERATOR CONTROL SYSTEMACC-3
< REMOVAL AND INSTALLATION >
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REMOVAL AND INSTALLATION
ACCELERATOR CONTROL SYSTEM
MODELS WITHOUT DISTANCE
CONTROL ASSIST SYSTEM
MODELS WITHOUT DISTANCE CONTRO L ASSIST SYSTEM : Exploded View
INFOID:0000000006289700
MODELS WITHOUT DISTANCE CONTROL ASS IST SYSTEM : Removal and Instal-
lation
INFOID:0000000006289701
REMOVAL
1. Remove the inside mounting nuts.
2. Remove accelerator pedal assembly.
3. Disconnect accelerator pedal position sensor harness connector. CAUTION:
 Never disassemble accelerator pedal assembly.
 Never remove accelerator pedal position sensor from accelerator pedal assembly.
 Avoid impact from dropping etc. during handling.
 Be careful to keep accelerator lever away from water.
INSTALLATION
Installation is the reverse order of removal.
MODELS WITHOUT DISTANCE CONT ROL ASSIST SYSTEM : Inspection
INFOID:0000000006289702
INSPECTION AFTER INSTALLATION
 Check accelerator pedal moves smoothly within the whole operation range when it is fully depressed and
released.
 Check accelerator pedal securely returns to the fully released position.
 For the electrical inspection of accelerator pedal position sensor, refer to EC-470, "
Component Inspection
(Accelerator Pedal Position Sensor)".
CAUTION:
1. Accelerator pedal assembly
: Vehicle front
Refer to GI-4, "
Components" for symbols in the figure.
JPBIA3268GB
Revision: 2010 May2011 QX56

ACC-4
< REMOVAL AND INSTALLATION >
ACCELERATOR CONTROL SYSTEM
When harness connector of accelerator pedal position sensor is disconnected, perform “Accelerator
Pedal Released Position Learning”. Refer to EC-146, "
Description".
MODELS WITH DISTANCE CONTROL ASSIST SYSTEM
MODELS WITH DISTANCE CONTRO L ASSIST SYSTEM : Exploded View
INFOID:0000000006289703
MODELS WITH DISTANCE CONTROL ASSI ST SYSTEM : Removal and Installation
INFOID:0000000006289704
REMOVAL
1. Remove the inside mounting nuts.
2. Remove accelerator pedal assembly.
3. Disconnect accelerator pedal actuator harness connec tor and accelerator pedal position sensor harness
connector.
CAUTION:
 Never disassemble accelerator pedal assembly.
 Never remove accelerator pedal position sensor from accelerator pedal assembly.
 Avoid impact from dropping etc. during handling.
 Be careful to keep accelerator pedal assembly away from water.
INSTALLATION
Installation is the reverse order of removal.
MODELS WITH DISTANCE CONTRO L ASSIST SYSTEM : InspectionINFOID:0000000006289705
INSPECTION AFTER INSTALLATION
 Check accelerator pedal moves smoothly within the whole operation range when it is fully depressed and
released.
 Check accelerator pedal securely returns to the fully released position.
 For the electrical inspection of acce lerator pedal position sensor, Refer to EC-470, "
Component Inspection
(Accelerator Pedal Position Sensor)".
CAUTION:
When harness connector of accelerator pedal posi tion sensor is disconnected, perform “Accelerator
Pedal Released Position Learning”. Refer to EC-146, "
Description".
1. Accelerator pedal assembly
Vehicle front
Refer to GI-4, "
Components" for symbols in the figure.
JPBIA3267GB
Revision: 2010 May2011 QX56

ADP-1
BODY INTERIOR
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SECTION ADP
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CONTENTS
AUTOMATIC DRIVE POSITIONER
PRECAUTION ................ ...............................5
PRECAUTIONS .............................................. .....5
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
5
SYSTEM DESCRIPTION ..............................6
COMPONENT PARTS ................................... .....6
Component Parts Location .................................. ......6
Component Description ............................................7
SYSTEM .............................................................11
AUTOMATIC DRIVE POSITIONER SYSTEM ....... ....11
AUTOMATIC DRIVE POSITIONER SYSTEM :
System Diagram ......................................................
11
AUTOMATIC DRIVE POSITIONER SYSTEM :
System Description .................................................
11
MANUAL FUNCTION ............................................ ....12
MANUAL FUNCTION : System Diagram ................13
MANUAL FUNCTION : System Description ............13
MEMORY FUNCTION ........................................... ....14
MEMORY FUNCTION : System Diagram ...............15
MEMORY FUNCTION : System Description ..........15
EXIT ASSIST FUNCTION ...................................... ....17
EXIT ASSIST FUNCTION : System Diagram .........17
EXIT ASSIST FUNCTION : Sy stem Description .....17
ENTRY ASSIST FUNCTION ................................. ....18
ENTRY ASSIST FUNCTION : System Diagram .....18
ENTRY ASSIST FUNCTION : System Description
....
18
INTELLIGENT KEY INTERLOCK FUNCTION ...... ....19
INTELLIGENT KEY INTERLOCK FUNCTION :
System Diagram ......................................................
20
INTELLIGENT KEY INTERLOCK FUNCTION :
System Description .................................................
20
Fail Safe .............................................................. ....21
DIAGNOSIS SYSTEM (DRIVER SEAT CON-
TROL UNIT) ......................................................
22
CONSULT-III Function ............................................22
ECU DIAGNOSIS INFORMATION ..............25
DRIVER SEAT CONTROL UNIT ......................25
Reference Value .................................................. ....25
Fail Safe ..................................................................30
DTC Index ...............................................................31
AUTOMATIC DRIVE POSITIONER CON-
TROL UNIT ........................................................
32
Reference Value ......................................................32
BCM (BODY CONTROL MODULE) .................35
List of ECU Reference .............................................35
WIRING DIAGRAM ......................................36
AUTOMATIC DRIVE POSITIONER SYSTEM ...36
Wiring Diagram .................................................... ....36
BASIC INSPECTION ...................................48
DIAGNOSIS AND REPAIR WORK FLOW .......48
Work Flow ............................................................ ....48
INSPECTION AND ADJUSTMENT ..................51
ADDITIONAL SERVICE WHEN REMOVING BAT-
TERY NEGATIVE TERMINAL ............................... ....
51
ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL : Description .....
51
ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL : Special Re-
pair Requirement .....................................................
51
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT .................................................... ....
51
Revision: 2010 May2011 QX56

ADP-22
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (DRIVER SEAT CONTROL UNIT)
DIAGNOSIS SYSTEM (DRIVER SEAT CONTROL UNIT)
CONSULT-III FunctionINFOID:0000000006248316
The automatic drive positioner system can be c hecked and diagnosed for component operation using CON-
SULT-III.
APPLICATION ITEMS
SELF-DIAGNOSIS RESULTS
Refer to ADP-31, "DTCIndex".
DATA MONITOR
Diagnostic mode Description
Ecu Identification Displays part numbers of driver seat control unit.
Self Diagnostic Result Performs self-diagnosis for the auto drive positioner system and displays the results.
Data Monitor Displays input signals transmitted from various switches and sensors to driver seat control unit
in real time.
Active Test Drives each output unit.
Work support Changes the setting for each system function.
Monitor Item Unit Main
Signals Selection
From
Menu Contents
STARTER SW “ON/OFF” ××Ignition key switch ON (START, ON) /OFF (ACC, OFF) sta-
tus judged from the ignition switch signal.
SET SW “ON/OFF” ××ON/OFF status judged from the setting switch signal.
MEMORY SW 1 “ON/OFF” ××ON/OFF status judged from the seat memory switch 1 sig-
nal.
MEMORY SW 2 “ON/OFF” ××ON/OFF status judged from the seat memory switch 2 sig-
nal.
DETENT SW “ON/OFF” ××The A/T shift selector position
“OFF (P position) / ON (other
than P position)” judged from the detention switch signal.
STEERING STATUS “LOCK/UN-
LOCK” ××
LOCK/UNLOCK status judged from steering lock unit.
SLIDE SW–FR “ON/OFF” ××ON/OFF status judged from the sliding switch (forward) sig-
nal.
SLIDE SW–RR “ON/OFF” ××ON/OFF status judged from the sliding switch (backward)
signal.
RECLN SW–FR “ON/OFF” ××ON/OFF status judged from the reclining switch (forward)
signal.
RECLN SW–RR “ON/OFF” ××ON/OFF status judged from the reclining switch (backward)
signal.
LIFT FR SW–UP “ON/OFF” ××ON/OFF status judged from the lifting switch front (up) sig-
nal.
LIFT FR SW–DN “ON/OFF” ××ON/OFF status judged from the lifting switch front (down)
signal.
LIFT RR SW–UP “ON/OFF” ××ON/OFF status judged from the lifting switch rear (up) sig-
nal.
LIFT RR SW–DN “ON/OFF” ××ON/OFF status judged from the lifting switch rear (down)
signal.
TILT SW-UP “ON/OFF” ××ON/OFF status judged from the tilt switch (up) signal.
TILT SW-DOWN “ON/OFF” ××ON/OFF status judged from the tilt switch (down) signal.
Revision: 2010 May2011 QX56

DRIVER SEAT CONTROL UNITADP-25
< ECU DIAGNOSIS INFORMATION >
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ECU DIAGNOSIS INFORMATION
DRIVER SEAT CONTROL UNIT
Reference ValueINFOID:0000000006248317
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III MONITOR ITEM
Monitor Item Condition Value/Status
SET SW Set switch Push ON
Release OFF
MEMORY SW1 Memory switch 1 Push ON
Release OFF
MEMORY SW2 Memory switch 2 Push ON
Release OFF
SLIDE SW–FR Sliding switch (forward) Operate ON
Release OFF
SLIDE SW–RR Sliding switch (backward) Operate ON
Release OFF
RECLN SW–FR Reclining switch (forward)Operate ON
Release OFF
RECLN SW–RR Reclining switch (back-
ward) Operate ON
Release OFF
LIFT FR SW–UP Lifting switch front (up) Operate ON
Release OFF
LIFT FR SW–DN Lifting switch front (down) Operate ON
Release OFF
LIFT RR SW–UP Lifting switch rear (up) Operate ON
Release OFF
LIFT RR SW–DN Lifting switch rear (down) Operate ON
Release OFF
MIR CON SW–UP Mirror switch Up ON
Other than the above OFF
MIR CON SW–DN Mirror switch Down ON
Other than the above OFF
MIR CON SW–RH Mirror switch Right ON
Other than the above OFF
MIR CON SW–LH Mirror switch Left ON
Other than the above OFF
MIR CHNG SW–R Chan geover switchRight ON
Other than the above OFF
MIR CHNG SW–L Chan geover switchLeft ON
Other than the above OFF
TILT SW-UP Tilt switch Upward ON
Other than the above OFF
TILT SW-DOWN Tilt switch Downward ON
Other than the above OFF
Revision: 2010 May2011 QX56

ADP-26
< ECU DIAGNOSIS INFORMATION >
DRIVER SEAT CONTROL UNIT
TELESCO SW-FR Telescopic switchForward ON
Other than the above OFF
TELESCO SW-RR Telescopic switch Backward ON
Other than the above OFF
DETENT SW A/T shift selector P position OFF
Other than the above ON
STARTER SW Ignition position Cranking ON
Other than the above OFF
SLIDE PULSE Seat sliding Forward The numeral value decreases *
Backward The numeral value increases*
Other than the above No change to numeral value*
RECLN PULSE Seat reclining Forward The numeral value decreases*
Backward
The numeral value increases
*
Other than the above
No change to numeral value*
LIFT FR PULSE Seat lifter (front) Up
The numeral value decreases
*
Down The numeral value increases *
Other than the above
No change to numeral value*
LIFT RR PULSE Seat lifter (rear) Up
The numeral value decreases
*
Down The numeral value increases *
Other than the above No change to numeral value*
MIR/SEN RH U–D Door mirror (passenger side) Change between 3.4 (close to peak)
0.6 (close to valley)
MIR/SEN RH R–L Door mirror (passenger side) Change between 3.4 (close to left edge)
0.6 (close to right edge)
MIR/SEN LH U–D Door mirror (driver side) Change between 3.4 (close to peak)
0.6 (close to valley)
MIR/SEN LH R–L Door mirror (driver side) Change between 0.6 (close to left edge)
3.4 (close to right edge)
TILT PULSE Tilt position Upward
The numeral value decreases
*
Downward The numeral value increases *
Other than the above
No change to numeral value*
TELESCO PULSE Telescopic position Forward
The numeral value decreases
*
Backward The numeral value increases *
Other than the above
No change to numeral value*
STEERING STATUS Steering lock unit LOCK LOCK
unlock UNLOCK
VEHICLE SPEED The condition of vehicle speed is displayed km/h
P RANG SW CAN A/T shift selector P position ON
Other than the above OFF
R RANGE (CAN) A/T shift selector R position ON
Other than the above OFF
DOOR SW-FL Driver door Open ON
Close OFF
Monitor Item Condition Value/Status
Revision: 2010 May2011 QX56

DRIVER SEAT CONTROL UNITADP-27
< ECU DIAGNOSIS INFORMATION >
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*: The value at the position attained when the battery is connected is regarded as 32768.
TERMINAL LAYOUT
PHYSICAL VALUES
DOOR SW-FR Passenger door Open ON
Close OFF
IGN ON SW Ignition switch ON position ON
Other than the above OFF
ACC ON SW Ignition switch ACC or ON position ON
Other than the above OFF
KEY ON SW Intelligent Key Inserted is key slot ON
Inserted is not key slot OFF
KEYLESS ID UNLOCK button of Intelligent Key is pressed 1, 2, 3, 4 or 5
KYLS DR UNLK Intelligent Key or driver
side door request switch ON ON
OFF OFF
VHCL SPEED (ABS) Can signal from ABS Received ON
Not received OFF
HANDLE The BCM for handle position is displayed LHD
RHD
TRANSMISSION Transmission type is displayed AT o r C V T
MT
Monitor Item Condition Value/Status
JMJIA3903ZZ
Te r m i n a l N o .
(Wire color) Description
ConditionVoltage (V)
(Approx.)
+ - Signal name Input/
output
1
(R/Y) —CAN-H — — —
2
(R) Ground UART communication
(TX/RX) Input Ignition switch ON
JMJIA1391ZZ
Revision: 2010 May2011 QX56