air condition INFINITI QX56 2008 Factory Service Manual

A
B
C
D
E
F
G
H
I
J
K
L
M
N
P
O
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

2008
QUICK REFERENCE CHART: QX56
Front Disc Brake
INFOID:0000000006237753
Unit: mm (in)
Rear Disc BrakeINFOID:0000000006237754
Unit: mm (in)
Fluids and LubricantsINFOID:0000000006237752
Brake model AD41VA
Brake pad Standard thickness (new) 12.0 (0.476)
Repair limit thickness 1.0 (0.039)
Disc rotor Standard thickness (new) 30 (1.181)
Repair limit thickness 28 (1.102)
Maximum uneven wear (measured at 8 positions) 0.015 (0.0006)
Runout limit (with it attached to the vehicle) 0.03 (0.001)
Brake model
AD14VE
Brake pad Standard thickness (new) 12.0 (0.472)
Repair limit thickness 1.0 (0.039)
Disc rotor Standard thickness (new) 14.0 (0.551)
Repair limit thickness 12.5 (0.492)
Maximum uneven wear (measured at 8 positions) 0.015 (0.0006)
Runout limit (with it attached to the vehicle) 0.05 (0.002)
Description
Capacity (Approximate)
Metric US measure Imp measure
Fuel 105.8 28 gal 23 1/4 gal
Engine oil
Drain and refill With oil filter change
6.5 6 7/8 qt 5 3/4 qt
Without oil filter change 6.2 6 1/2 qt 5 1/2 qt
Dry engine (engine overhaul) 7.6 8 qt 6 3/4 qt
Cooling system With reservoir
at MAX level
14.4
15 1/4 qt 12 5/8 qt
Automatic transmission fluid (ATF) 10.6 11 1/4 qt 9 3/8 qt
Rear final drive oil 1.75 3 3/4 pt 3 1/8 pt
Transfer fluid 3.0 3 1/8 qt 2 5/8 qt
Front final drive oil 1.6 3 3/8 pt 2 7/8 pt
Power steering fluid (PSF) 1.0 1 1/8 qt 7/8 qt
Brake fluid — — —
Brake grease — — —
Multi-purpose grease — — —
Windshield washer fluid 4.9 5 1/8 qt 4 3/8 qt
Air conditioning system refrigerant 1.08 ± 0.05 kg 2.38 ± 0.11 lb 2.38 ± 0.11 lb
Air conditioning system oil 290 m9.8 fl oz 10.2 fl oz

ADP-3
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
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

ADP-6
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
1. GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred).
>> GO TO 2
2. CHECK DTC WITH AUTOMATIC DRIVE POSITIONER SYSTEM
Check “Self Diagnostic Result” with CONSULT-III.
Refer to ADP-123, "
DTCIndex".
Is any symptom described and any DTC is displayed?
Symptom is described, DTC is displayed.>>GO TO 3
Symptom is not described, DTC is displayed.>>GO TO 7
Symptom is described, DTC is not displayed.>>GO TO 4
3. CONFIRM THE SYMPTOM
Try to confirm the symptom described by the customer.
>> GO TO 7
4. CONFIRM THE SYMPTOM
Try to confirm the symptom described by the customer.
>> GO TO 5
5. CHECK NORMAL OPERATING CONDITION
Check normal operating condition. Refer to ADP-157, "
Description".
Is the incident normal operation?
YES >> INSPECTION END
NO >> GO TO 6
6. PERFORM BASIC INSPECTION
Isolate the malfunctioning point with the basic inspection. Refer to ADP-8, "
Preliminary Check".
>> GO TO 8
7. PERFORM DTC CONFIRMATION PROCEDURE
Perform the confirmation procedure for the detected DTC.
Is the DTC displayed?
YES >> GO TO 9
NO >> Check intermittent incident. Refer to GI-38, "
Intermittent Incident".
8. PERFORM COMPONENT FUNCTION CHECK
Perform the component function check for the isolated malfunctioning point.
>> GO TO 9
9. DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Isolate the malfunctioning point by performing the di agnosis procedure relevant to the symptom during the
component diagnosis.
>> GO TO 10
10. REPAIR OR REPLACE
Repair or replace the malfunctioning part.
Revision: March 2010 2008 QX56

U1000 CAN COMM CIRCUITADP-29
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000001735433
Refer to LAN-4, "System Description".
DTC LogicINFOID:0000000001735434
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1. STEP 1
Turn ignition switch ON and wait at least 3 seconds.
>> GO TO 2
2. STEP 2
Check “Self diagnostic result” with CONSULT-III.
Is the DTC detected?
YES >> Perform diagnosis procedure. Refer to ADP-29, "DiagnosisProcedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000001735435
Refer to LAN-10, "Self-Diagnosis".
Special Repair RequirementINFOID:0000000001735436
Refer to Owner’s Manual.
DTC Trouble diagnosis
name DTC detecting condition
Possible cause
U1000 CAN COMM CIR-
CUIT • Driver seat control unit cannot communicate to other
control units.
• Driver seat control unit c annot communicate for more
than the specified time. • Harness or connectors
(CAN communication line is
open or shorted)
Revision: March 2010 2008 QX56

ADP-34
< COMPONENT DIAGNOSIS >
B2117 ADJ PEDAL MOTOR
B2117 ADJ PEDAL MOTOR
DescriptionINFOID:0000000001735449
• The pedal adjusting motor is installed to the pedal assembly.
• The pedal adjusting motor is activated with the automatic drive positioner control unit.
• The pedal assembly is adjusted forward/backward by changing the rotation direction of pedal adjustingmotor.
DTC LogicINFOID:0000000001735450
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1. STEP 1
Turn ignition switch ON.
>> GO TO 2
2. STEP 2
Check “Self diagnostic result” with CONSULT-III.
Is the DTC detected?
YES >> Perform diagnosis procedure. Refer to ADP-34, "DiagnosisProcedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000001735451
1. CHECK PEDAL ADJUSTING MECHANISM
Check the following.
• Operation malfunction caused by pedal adjusting mechanism deformation or pinched harness or other for- eign materials
• Operation malfunction and interference wit h other parts by poor installation
Is the inspection result normal
YES >> GO TO 2
NO >> Repair or replace the malfunctioning part and check again.
2. CHECK FUNCTION
1. Turn ignition switch ON.
2. Check “ADJ PEDAL MOTOR” in "Active test" mode with CONSULT-III.
Is the inspection result normal?
YES >> Pedal adjusting motor circuit is OK.
NO >> GO TO 3
3. CHECK PEDAL ADJUSTING MOTOR CIRCUIT HARNESS CONTINUITY
DTC No. Trouble diagnosis
name DTC detecting condition
Possible cause
B2117 ADJ PEDAL MOTOR When any manual or automatic operations are not
performed, if motor operation is detected for 0.1
second or more, status is judged "Output error". • Harness and connectors
(pedal adjusting motor circuit is
opened/shorted, pedal adjusting
motor power supp ly circuit is
opened/shorted.)
• Pedal adjusting motor
Test item Description
ADJ PEDAL MOTOR The pedal adjusting motor is activated by receiving the drive signal.
Revision: March 2010 2008 QX56

B2117 ADJ PEDAL MOTORADP-35
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
1. Turn ignition switch OFF.
2. Disconnect automatic drive positioner control unit and pedal adjusting motor.
3. Check continuity between automatic drive positioner control unit connector M34 (A) terminals 37, 45 and pedal adjusting motor
connector E109 (B) terminals 1, 2.
4. Check continuity between automat ic drive positioner control unit
connector M34 (A) terminals 37, 45 and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
4. CHECK AUTOMATIC DRIVE POSITION ER CONTROL UNIT OUTPUT SIGNAL
1. Connect the automatic drive positioner control unit and pedal adjusting motor.
2. Check voltage between automatic drive positioner control unit
connector and ground.
Is the inspection result normal?
YES >> Replace pedal adjusting motor.
NO >> GO TO 5
5. CHECK INTERMITTENT INCIDENT
Refer to GI-38, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace automatic driv e positioner control unit.
NO >> Repair or replace the malfunctioning part. 37 - 1
: Continuity should exist.
45 - 2 : Continuity should exist.
37 - Ground : Continuity should not exist.
45 - Ground : Continuity should not exist.
ALJIA0195ZZ
Connec-
tor Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M34 37
Ground Pedal adjusting switch ON
(FORWARD operation)
Battery voltage
Other than above 0
45 Pedal adjusting switch ON
(BACKWARD operation)
Battery voltage
Other than above 0
PIIA4806E
Revision: March 2010 2008 QX56

B2118 TILT SENSORADP-37
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
1. Turn ignition switch OFF.
2. Check voltage between automatic drive positioner connector
and ground.
OK or NG
OK >> Tilt sensor circuit is OK.
NG >> GO TO 3
3. CHECK HARNESS CONTINUITY
1. Disconnect automatic drive positioner control unit and tilt sensor.
2. Check continuity between automatic drive positioner connector M33, M34 terminals 7, 33, 41 and tilt sensor connector M85 ter-
minals 2, 3, 4.
3. Check continuity between automatic drive positioner control unit connectors M33, M34 te rminals 7, 33, 41 and ground.
OK or NG
OK >> Replace tilt motor. Refer to ST-19, "Removal and Instal-
lation".
NG >> Repair or replace harness.
4. CHECK DOOR MIRROR OPERATION
1. Connect automatic drive positioner control unit connector and tilt sensor.
2. Turn ignition switch ON.
3. Check door mirror operation with memory function.
Is the operation normal?
YES >> Replace tilt sensor. Refer to ST-19, "Removal and Installation".
NO >> GO TO 5
5. CHECK INTERMITTENT INCIDENT
Refer to GI-38, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace automatic driv e positioner control unit.
NO >> Repair or replace the malfunctioning part.
Connector Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M33 7 Ground Tilt top position 2
Tilt bottom position
4
LIIA0485E
7 - 3: Continuity should exist.
33 - 2 : Continuity should exist.
41 - 4 : Continuity should exist.
7 - Ground : Continuity should not exist.
33 - Ground : Continuity should not exist.
41 - Ground : Continuity should not exist.
LIIA1432E
Revision: March 2010 2008 QX56

B2126 DETENT SWADP-41
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and A/T shift selector.
3. Check continuity between driver seat control unit harness con- nector (A) and A/T shift selector harness connector (B).
4. Check continuity between driver seat control unit harness con- nector (A) and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
4. CHECK PARK POSITION SWITCH
Check continuity between A/T shift selector (park position switch)
terminals as follows.
Is the inspection result normal?
YES >> GO TO 5
NO >> Replace A/T shift selector. Refer to TM-195, "
A/T Shift
Selector Removal and Installation".
5. CHECK INTERMITTENT INCIDENT
Refer to GI-38, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace driver seat control unit.
NO >> Repair or replace the malfunctioning part.
AB Continuity
Connector Terminal Connector Terminal
B202 21 M203 6Yes
A —Contin u it y
Connector Terminal
B202 21 Ground No
ALJIA0194ZZ
TerminalsConditionContinuity
56 P position
Yes
Other than P position No
ALJIA0551ZZ
Revision: March 2010 2008 QX56

ADP-44
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
BCM
BCM : Diagnosis ProcedureINFOID:0000000001735461
Refer to BCS-32, "Diagnosis Procedure".
BCM : Special Repair RequirementINFOID:0000000001735462
1. REQUIRED WORK WHEN REPLACING BCM
Initialize control unit. Refer to CONSULT-III Operation Manual.
>> Work end.
DRIVER SEAT CONTROL UNIT
DRIVER SEAT CONTROL UN IT : Diagnosis ProcedureINFOID:0000000001735463
NOTE:
Do not disconnect the battery negative terminal and the driver seat control unit connector until DTC is con-
firmed with CONSULT-III.
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Check voltage between driver seat control unit harness connec- tor and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Check the following. • Repair or replace harness between driver seat control unit and fuse block (J/B).
• Circuit breaker.
2. CHECK GROUND CIRCUIT
Check continuity between the driver seat control unit harness con-
nector and ground.
Is the inspection result normal?
YES >> Driver seat control unit power supply and ground circuit are OK.
NO >> Repair or replace harness.
Te r m i n a l s
Power
source ConditionVoltage (V)
(Approx.)
(+)
(–)
Driver seat
control unit connector Te r m i n a l
B202 6
Ground START
power sup-
ply Ignition
switch
START Battery
voltage
B203 33
Battery
power sup- ply Ignition
switch OFF
40
LIIA1897E
Driver seat control unit
connector Te r m i n a l
Ground Continuity
B202 32
Ye s
B203 48
PIIA4542E
Revision: March 2010 2008 QX56