2008 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-
LINETMTransaxle & 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 Postioner
APAdjustable Pedal
KBODY EXTERIOR,
DOORS, ROOF & VEHICLE
SECURITYDLKDoor & Lock
SECSecurity Control System
GWGlass & Window System
PWCPower Window Control System
RFRoof
EXTExterior
BRMBody Repair Manual
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 CONTROLCCSCruise Control 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, photo-copying, record-
ing or otherwise, without the
prior written permission of
Nissan North America, Inc.
Edition: May 2007
Revision: March 2010
Publication No. SM8E-1J60U2

ADP-3
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RECLINING SENSOR .................................... ....73
Description .......................................................... ....73
Component Function Check ..................................73
Diagnosis Procedure ..............................................73
LIFTING SENSOR (FRONT) ..............................75
Description .......................................................... ....75
Component Function Check ..................................75
Diagnosis Procedure ..............................................75
LIFTING SENSOR (REAR) ................................77
Description .......................................................... ....77
Component Function Check ..................................77
Diagnosis Procedure ..............................................77
TILT SENSOR ....................................................79
Description ..............................................................79
Component Function Check ..................................79
Diagnosis Procedure ..............................................79
PEDAL ADJUSTING SENSOR ..........................81
Description .......................................................... ....81
Component Function Check ..................................81
Diagnosis Procedure ..............................................81
MIRROR SENSOR .............................................83
DRIVER SIDE ........................................................ ....83
DRIVER SIDE : Description ....................................83
DRIVER SIDE : Component Function Check ........83
DRIVER SIDE : Diagnosis Procedure ....................83
PASSENGER SIDE ...................................................85
PASSENGER SIDE : Description ....................... ....85
PASSENGER SIDE :
Component Function Check ..................................
85
PASSENGER SIDE : Diagnosis Procedure ...........85
SLIDING MOTOR ...............................................87
Description ..............................................................87
Component Function Check ..................................87
Diagnosis Procedure ..............................................87
RECLINING MOTOR ..........................................89
Description .......................................................... ....89
Component Function Check ..................................89
Diagnosis Procedure ..............................................89
LIFTING MOTOR (FRONT) ................................91
Description .......................................................... ....91
Component Function Check ..................................91
Diagnosis Procedure ..............................................91
LIFTING MOTOR (REAR) ..................................93
Description .......................................................... ....93
Component Function Check ..................................93
Diagnosis Procedure ..............................................93
TILT MOTOR ......................................................95
Description .......................................................... ....95
Component Function Check ..................................95
Diagnosis Procedure ..............................................95
PEDAL ADJUSTING MOTOR ..........................97
Description ........................................................... ....97
Component Function Check ..................................97
Diagnosis Procedure ..............................................97
DOOR MIRROR MOTOR ..................................99
Description ...............................................................99
Component Function Check ....................................99
Diagnosis Procedure ...............................................99
Component Inspection ...........................................101
SEAT MEMORY INDICATOR LAMP ..............102
Description .............................................................102
Component Function Check ................................102
Diagnosis Procedure ............................................102
Component Inspection ...........................................103
ECU DIAGNOSIS .......................................104
DRIVER SEAT CONTROL UNIT ....................104
Reference Value .................................................. ..104
Wiring Diagram ......................................................109
Fail Safe ................................................................122
DTC Index .............................................................123
AUTOMATIC DRIVE POSITIONER CON-
TROL UNIT ......................................................
124
Reference Value ....................................................124
Wiring Diagram ......................................................127
BCM (BODY CONTROL MODULE) ...............141
Reference Value ....................................................141
Terminal Layout .....................................................143
Physical Values ................................................... ..143
Wiring Diagram ......................................................149
Fail Safe ................................................................152
DTC Inspection Priority Chart .............................153
DTC Index .............................................................153
SYMPTOM DIAGNOSIS ............................155
ADP SYSTEM SYMPTOMS ............................155
Symptom Table ................................................... ..155
NORMAL OPERATING CONDITION .............157
Description .............................................................157
PRECAUTION ............................................158
PRECAUTIONS ...............................................158
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
158
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
158
Precaution for Work ...............................................159
ON-VEHICLE MAINTENANCE ..................160
PRE-INSPECTION FOR DIAGNOSTIC ..........160
Basic Inspection .................................................. ..160
Revision: March 2010 2008 QX56

DIAGNOSIS AND REPAIR WORKFLOWADP-7
< BASIC INSPECTION >
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>> GO TO 11
11 . FINAL CHECK
Perform the DTC confirmation procedure (if DTC is detected) or component function check (if no DTC is
detected) again, and then check that the malfunction can be repaired securely.
Are all malfunctions corrected?
YES >> INSPECTION END
Symptom is detected.>> GO TO 4
DTC is detected.>> GO TO 7
Revision: March 2010 2008 QX56

ADP-26
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (DRIVER SEAT C/U)
DIAGNOSIS SYSTEM (DRIVER SEAT C/U)
Diagnosis DescriptionINFOID:0000000001735430
The auto drive positioner system can be checked and diagnosed for component operation with CONSULT-III.
DIAGNOSTIC MODE
CONSULT-III FunctionINFOID:0000000001735431
SELF-DIAGNOSIS RESULTS
Refer to ADP-123, "DTCIndex".
DATA MONITOR
Diagnostic mode
[AUTO DRIVE POS.] Description
WORK SUPPORT Changes the setting of each function.
SELF-DIAG RESULTS 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 con-
trol unit in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ACTIVE TEST Drive each output device.
ECU PART NUMBER Displays part numbers of driver seat control unit parts.
Monitor ItemUnitMain
Signals Selection
From
Menu Contents
SET SW “ON/OFF”×× ON/OFF status judged from the setting switch signal.
MEMORY SW1 “ON/OFF”×× ON/OFF status judged from the seat memory switch 1 sig-
nal.
MEMORY SW2 “ON/OFF”×× ON/OFF status judged from the seat memory switch 2 sig-
nal.
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.
MIR CON SW–UP “ON/OFF” ××ON/OFF status judged from the mirror switch (up) signal.
MIR CON SW–DN “ON/OFF” ××ON/OFF status judged from the mirror switch (down) signal.
MIR CON SW–RH “ON/OFF” ××ON/OFF status judged from the door mirror remote control
switch (passenger side) signal.
MIR CON SW–LH “ON/OFF” ××ON/OFF status judged from the door mirror remote control
switch (driver
side) signal.
Revision: March 2010 2008 QX56

ADP-104
< ECU DIAGNOSIS >
DRIVER SEAT CONTROL UNIT
ECU DIAGNOSIS
DRIVER SEAT CONTROL UNIT
Reference ValueINFOID:0000000001735551
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III MONITOR ITEM
Monitor ItemCondition 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 (front) Operate
ON
Release OFF
SLIDE SW–RR Sliding switch (rear) Operate
ON
Release OFF
RECLN SW–FR Reclining switch (front) Operate
ON
Release OFF
RECLN SW–RR Reclining switch (rear) 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 above OFF
MIR CON SW–DN Mirror switch Down
ON
Other than above OFF
MIR CON SW–RH Mirror switch Right
ON
Other than above OFF
MIR CON SW–LH Mirror switch Left
ON
Other than above OFF
MIR CHNG SW–R Chan geover switchRight
ON
Other than above OFF
MIR CHNG SW–L Chan geover switchLeft
ON
Other than above OFF
PEDAL SW-FR Pedal adjusting switch Forward
ON
Other than above OFF
PEDAL SW-RR Pedal adjusting switch Backward
ON
Other than above OFF
Revision: March 2010 2008 QX56

DRIVER SEAT CONTROL UNITADP-105
< ECU DIAGNOSIS >
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TERMINAL LAYOUT
PHYSICAL VALUES
DETENT SW AT selector lever P position
OFF
Other than above ON
STARTER SW Ignition position Cranking
ON
Other than above OFF
SLIDE PULSE Seat sliding Forward
The numeral value decreases
Backward The numeral value increases
Other than above No change to numeral value
RECLN PULSE Seat reclining Forward
The numeral value decreases
Backward The numeral value increases
Other than above No change to numeral value
LIFT FR PULSE Seat lifter (front) Up
The numeral value decreases
Down The numeral value increases
Other than above No change to numeral value
LIFT RR PULSE Seat lifter (rear) Up
The numeral value decreases
Down The numeral value increases
Other than above No change to numeral value
MIR/SEN RH U–D Door mirror (passenger side) Close to peak
3.4
Close to valley 0.6
MIR/SEN RH R–L Door mirror (passenger side) Close to left edge
3.4
Close to right edge 0.6
MIR/SEN LH U–D Door mirror (driver side) Close to peak
3.4
Close to valley 0.6
MIR/SEN LH R–L Door mirror (driver side) Close to left edge
0.6
Close to right edge 3.4
PEDAL SEN Pedal position Forward
0.5
Backward 4.5
Monitor Item
Condition Value/Status
LIIA2449E
Revision: March 2010 2008 QX56

ADP-106
< ECU DIAGNOSIS >
DRIVER SEAT CONTROL UNIT
Te r m i n a lWire
Color Item
Condition Voltage (V)
(Approx.)
1 L UART LINE (RX) Pedal adjusting switch ON (FOR-
WARD or BACKWARD operation)
3 L CAN-H ——
6 O Ignition switch (START) Ignition switch (START position) Battery voltage
9 L/R Reclining motor sensor signal ON (seat reclining motor opera-
tion)
Other than above
0 or 5
10 W Rear lifting motor sensor signal ON (rear lifting motor operation)
Other than above
0 or 5
11 R / B Sliding switch BACKWARD sig-
nal ON (seat sliding switch BACK-
WARD operation)
0
Other than above Battery voltage
12 O/B Reclining switch BACKWARD
signal ON (seat reclining switch BACK-
WARD operation)
0
Other than above Battery voltage
13 L/B Front lifting switch DOWN signal ON (front lifting switch DOWN op-
eration)
0
Other than above Battery voltage
14 G/W Rear lifting switch DOWN signal ON (rear lifting switch DOWN op-
eration)
0
Other than above Battery voltage
15 L/Y Pedal adjustin
g switch BACK-
WARD signal ON (pedal adjusting switch BACK-
WARD operation)
0
Other than above Battery voltage
16 W Seat sensor power Ignition switch ON 5
17 W UART LINE (TX) Pedal adjusting switch ON (FOR-
WARD or BACKWARD operation)
PIIA4813E
SIIA0692J
SIIA0693J
PIIA4814E
Revision: March 2010
2008 QX56

DRIVER SEAT CONTROL UNITADP-107
< ECU DIAGNOSIS >
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19 P CAN-L ——
21 L/R A/T shift selector (park position
switch) signal A/T selector lever in P position
0
A/T selector lever in other than P
position with ignition key in ignition
cylinder Battery voltage
24 Y/G Seat sliding motor sensor signal ON (seat sliding motor operation)
Other than above
0 or 5
25 LG Front lifting motor sensor signal ON (front lifting motor operation)
Other than above.
0 or 5
26 P/B Seat sliding switch FORWARD
signal ON (seat sliding switch FOR-
WARD operation)
0
Other than above Battery voltage
27 G/B Seat reclining switch FORWARD
signal ON (seat reclining switch FOR-
WARD operation)
0
Other than above Battery voltage
28 Y/B Front lifting switch UP signal ON (front lifting switch UP opera-
tion)
0
Other than above Battery voltage
29 R/W Rear lifting switch UP signal ON (rear lifting switch UP opera-
tion)
0
Other than above Battery voltage
30 R Pedal adjusting switch FOR-
WARD signal ON (pedal adjusting switch FOR-
WARD operation)
0
Other than above Battery voltage
31 L/Y Sensor ground —0
32 B Ground —0
33 L/B Battery power supply —Battery voltage
35 V/W Sliding motor FORWARD output
signal Sliding switch FORWARD opera-
tion (Motor operated)
Battery voltage
Other than above 0
36 Y/G Reclining motor FORWARD out-
put signal Reclining switch FORWARD oper-
ation (Motor operated)
Battery voltage
Other than above 0
37 BR Front lifting motor DOWN output
signal Front lifting switch DOWN opera-
tion (Motor operated)
Battery voltage
Other than above 0
Te r m i n a l
Wire
Color Item
Condition Voltage (V)
(Approx.)
PIIA3277E
SIIA0691J
Revision: March 2010 2008 QX56