diagram INFINITI QX56 2008 Factory Service Manual

SCS-1
SUSPENSION
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SECTION SCS
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SCS
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O PCONTENTS
SUSPENSION CONTROL SYSTEM
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
FUNCTION DIAGNOSIS ...............................5
SUSPENSION CONTROL SYSTEM .............. .....5
System Diagram .................................................. ......5
System Description ...................................................5
Component Parts Location ........................................6
Component Description .............................................6
DIAGNOSIS SYSTEM (SUSPENSION CON-
TROL UNIT) .........................................................
7
CONSULT-III Function ..............................................7
COMPONENT DIAGNOSIS ..........................9
C1801 VEHICLE HEIGHT SENSOR .............. .....9
Description .......................................................... ......9
DTC Logic .................................................................9
Diagnosis Procedure ................................................9
C1802 COMPRESSOR RELAY .........................10
Description ..............................................................10
DTC Logic ...............................................................10
Diagnosis Procedure ..............................................10
C1803 EXHAUST SOLENOID ...........................11
Description ..............................................................11
DTC Logic ...............................................................11
Diagnosis Procedure ..............................................11
C1804 HEIGHT ADJUSTING MALFUNCTION
(COMPRESSOR) ............................................ ....
12
Description .......................................................... ....12
DTC Logic ...............................................................12
Diagnosis Procedure ..............................................12
C1805 HEIGHT ADJUSTING MALFUNCTION
(EXH SOLENOID) ..............................................
13
Description ........................................................... ....13
DTC Logic ................................................................13
Diagnosis Procedure ..............................................13
C1806 VEHICLE HEIGHT SENSOR LOCK-
ING MALFUNCTION .........................................
14
Description ........................................................... ....14
DTC Logic ................................................................14
Diagnosis Procedure ...............................................14
C1807 SENSOR 5V MALFUNCTION ...............15
Description ...............................................................15
DTC Logic ................................................................15
Diagnosis Procedure ..............................................15
C1808 INTEGRAL TIME MALFUNCTION
SUPPLYING AIR ...............................................
16
Description ...............................................................16
DTC Logic ................................................................16
Diagnosis Procedure ..............................................16
POWER SUPPLY AND GROUND CIRCUIT ....17
SUSPENSION CONTROL UNIT ................................17
SUSPENSION CONTROL UNI T : Diagnosis Pro-
cedure .................................................................. ....
17
SUSPENSION AIR COMPRESSOR ..........................17
SUSPENSION AIR COMPRESSOR : Diagnosis
Procedure ............................................................ ....
17
HEIGHT SENSOR .................................................. ....18
HEIGHT SENSOR : Diagnosis Procedure ..............18
COMPRESSOR MOTOR RELAY .....................20
Description ...............................................................20
Component Function Check ....................................20
Diagnosis Procedure ...............................................20
HEIGHT SENSOR SIGNAL CIRCUIT ...............22
Description ...............................................................22
Component Function Check ....................................22
Diagnosis Procedure ...............................................22
Revision: March 2010 2008 QX56

SCS-2
EXHAUST VALVE SOLENOID CIRCUIT ..........23
Description ........................................................... ...23
Component Function Check ...................................23
Diagnosis Procedure ..............................................23
CK SUSP WARNING INDICATOR CONTROL
CIRCUIT .............................................................
25
Description ........................................................... ...25
Component Function Check ...................................25
Diagnosis Procedure ..............................................25
ECU DIAGNOSIS ..................................... ...27
SUSPENSION CONTROL UNIT ........................27
Reference Value .................................................. ...27
Wiring Diagram .......................................................28
DTC Index ..............................................................33
SYMPTOM DIAGNOSIS .............................35
SUSPENSION CONTROL SYSTEM .............. ...35
Symptom Table ................................................... ...35
SUSPENSION CONTROL SYSTEM INOPER-
ATIVE .................................................................
36
Description ........................................................... ...36
Diagnosis Procedure ...............................................36
SUSPENSION CONTROL SYSTEM DOES
NOT RAISE ........................................................
37
Description ........................................................... ...37
Diagnosis Procedure ...............................................37
SUSPENSION CONTROL SYSTEM DOES
NOT LOWER .....................................................
38
Description ........................................................... ...38
Diagnosis Procedure ...............................................38
PRECAUTION ............................................39
PRECAUTIONS .............................................. ...39
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
39
Precaution for Rear Suspension .............................39
Revision: March 2010 2008 QX56

SUSPENSION CONTROL SYSTEMSCS-5
< FUNCTION DIAGNOSIS >
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FUNCTION DIAGNOSIS
SUSPENSION CONTROL SYSTEM
System DiagramINFOID:0000000001731955
System DescriptionINFOID:0000000001731956
SUSPENSION CONTROL SYSTEM
The suspension control system consists of the following components
• Suspension control unit
• Compressor motor relay
• Suspension air compressor
• Exhaust valve solenoid (built into suspension air compressor)
• Height sensor
The suspension control unit monitors vehicle ride height as indicated by the height sensor. The suspension
control unit actuates the compressor motor relay to ra ise the vehicle ride height. The suspension control unit
actuates the exhaust valve solenoid to lower the vehicle ride height.
CK SUSP INDICATOR LAMP
The CK SUSP indicator lamp ground is controlled by the suspension control unit. The indicator lamp will come
on for 2 seconds when the ignition switch is turned ON. If the indicator lamp does not turn OFF there is a fault
detected. Refer to SCS-7, "
CONSULT-III Function"
ALEIA0042GB
Revision: March 2010 2008 QX56

SCS-28
< ECU DIAGNOSIS >
SUSPENSION CONTROL UNIT
Wiring Diagram
INFOID:0000000001732000
AAEWA0003GB
Revision: March 2010 2008 QX56

SE-1
BODY INTERIOR
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SECTION SE
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SE
N
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CONTENTS
SEAT
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
INSPECTION AND ADJUSTMENT .....................5
Preliminary Check ............................................... ......5
FUNCTION DIAGNOSIS ...............................6
THIRD ROW POWER FOLDING SEAT ......... .....6
System Description ............................................. ......6
Component Parts Location ........................................7
Component Description .............................................7
COMPONENT DIAGNOSIS ..........................8
POWER SEAT .....................................................8
Wiring Diagram — Passenger Side — ................ ......8
HEATED SEAT ...................................................12
Description ..............................................................12
Wiring Diagram .......................................................13
THIRD SEAT ......................................................18
Power Supply and Ground Circuit Check for Third
Row Power Folding Seat Control Unit ................. ....
18
Third Row Power Folding Seat Switch ....................19
Third Row Power Folding Seat Motor .....................19
ECU DIAGNOSIS .........................................21
THIRD ROW POWER FOLDING SEAT CON-
TROL UNIT .........................................................
21
Reference Value ................................................. ....21
Wiring Diagram .......................................................23
DTC Index ...............................................................28
Fail Safe ..................................................................29
SYMPTOM DIAGNOSIS ..............................30
THIRD ROW POWER FOLDING SEAT ......... ....30
Symptom Table ................................................... ....30
NONE OF THE THIRD ROW POWER FOLD-
ING SEATS WILL OPERATE WITH ANY
SWITCH. ............................................................
31
None of the Third Row Power Folding Seats Will
Operate With Any Third Row Power Folding Seat
Switch .................................................................. ....
31
ONLY ONE THIRD ROW POWER FOLDING
SEAT WILL OPERATE. ....................................
32
Only One Third Row Power Folding Seat Will Op-
erate .................................................................... ....
32
THIRD ROW POWER FOLDING SEAT WILL
OPERATE IN ONLY ONE DIRECTION. ...........
34
Third Row Power Folding Seat Will Operate in
Only One Direction .............................................. ....
34
THIRD ROW POWER FOLDING SEAT WILL
STOP SHORT OF IT’S FULLY UP OR DOWN
POSITION. .........................................................
35
Third Row Power Folding Seat Stops Short of its
Fully Up or Down Position .......................................
35
THIRD ROW POWER FOLDING SEAT
MAKES EXCESSIVE NOISE WHILE MOV-
ING. ...................................................................
36
Third Row Power Folding Seat Makes Excessive
Noise While Moving ............................................. ....
36
SQUEAK AND RATTLE TROUBLE DIAG-
NOSES ..............................................................
37
Work Flow ................................................................37
Generic Squeak and Rattle Troubleshooting ...........39
Diagnostic Worksheet ..............................................41
PRECAUTION ..............................................43
PRECAUTIONS .................................................43
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
43
Revision: March 2010 2008 QX56

SE-8
< COMPONENT DIAGNOSIS >
POWER SEAT
COMPONENT DIAGNOSIS
POWER SEAT
Wiring Diagram — Passenger Side —INFOID:0000000001735715
AAJWA0042GB
Revision: March 20102008 QX56

HEATED SEATSE-13
< COMPONENT DIAGNOSIS >
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Wiring DiagramINFOID:0000000001735717
AAJWA0043GB
Revision: March 2010 2008 QX56

THIRD ROW POWER FOLDING SEAT CONTROL UNITSE-23
< ECU DIAGNOSIS >
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Wiring DiagramINFOID:0000000001735722
AAJWA0044GB
Revision: March 2010 2008 QX56

SEC-1
BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY
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SECTION SEC
A
B
SEC
N
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CONTENTS
SECURITY CONTROL SYSTEM
WITH INTELLIGENT KEY SYSTEM
BASIC INSPECTION ....... .............................
3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
PRE-INSPECTION FOR DIAGNOSTIC ..............6
Basic Inspection .................................................. ......6
Vehicle Security Operation Check ............................6
INSPECTION AND ADJUSTMENT .....................8
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT .................................................... ......
8
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement .......
8
ECM RE-COMMUNICATING FUNCTION ............. ......8
ECM RE-COMMUNICATING FUNCTION : De-
scription .....................................................................
8
ECM RE-COMMUNICATING FUNCTION : Spe-
cial Repair Requirement ............................................
8
FUNCTION DIAGNOSIS ...............................9
INTELLIGENT KEY SYSTEM/ENGINE
START FUNCTIO N ........................................ .....
9
System Diagram .................................................. ......9
System Description ...................................................9
Component Parts Location ......................................11
Component Description ...........................................12
NVIS (NISSAN VEHICLE IMMOBILIZER SYS-
TEM-NATS) ........................................................
13
System Diagram .................................................. ....13
System Description .................................................13
Component Parts Location ......................................15
Component Description ..........................................15
VEHICLE SECURITY SYSTEM .........................17
System Diagram .................................................. ....17
System Description .................................................17
Component Parts Location .................................. ....18
Component Description ...........................................19
DIAGNOSIS SYSTEM (BCM) ...........................20
COMMON ITEM ..................................................... ....20
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
20
IMMU ...................................................................... ....20
IMMU : CONSULT-III Function (BCM - IMMU) ........20
THEFT ALM ........................................................... ....21
THEFT ALM : CONSULT-III Function (BCM -
THEFT ALM) ....................................................... ....
21
DIAGNOSIS SYSTEM (INTELLIGENT KEY
UNIT) .................................................................
22
CONSULT-III Function (INTELLIGENT KEY) ..........22
COMPONENT DIAGNOSIS .........................24
U1000 CAN COMM CIRCUIT ...........................24
Description ........................................................... ....24
DTC Logic ................................................................24
Diagnosis Procedure ...............................................24
U1010 CONTROL UNIT (CAN) .........................25
Description ...............................................................25
DTC Logic ................................................................25
Diagnosis Procedure ...............................................25
Special Repair Requirement ....................................25
B2013 ID DISCORD I-KEY-STRG ....................26
Description ...............................................................26
DTC Logic ................................................................26
Diagnosis Procedure ...............................................26
B2190, P1614 NATS ANTENNA AMP. ............29
Description ...............................................................29
DTC Logic ................................................................29
Diagnosis Procedure ...............................................29
Revision: March 2010 2008 QX56

SEC-2
B2191, P1615 DIFFERENCE OF KEY ..............32
Description ..............................................................32
DTC Logic ...............................................................32
Diagnosis Procedure ..............................................32
B2192, P1611 ID DISCORD, IMMU-ECM .........33
Description ........................................................... ...33
DTC Logic ...............................................................33
Diagnosis Procedure ..............................................33
B2193, P1612 CHAIN OF ECM-IMMU ..............35
Description ........................................................... ...35
DTC Logic ...............................................................35
Diagnosis Procedure ..............................................35
B2194 ID DISCORD IMMU-I-KEY .....................36
Description ........................................................... ...36
DTC Logic ...............................................................36
Diagnosis Procedure ..............................................36
B2552 INTELLIGENT KEY ................................37
Description ........................................................... ...37
DTC Logic ...............................................................37
Diagnosis Procedure ..............................................37
Special Repair Requirement ...................................37
B2590 ID DISCORD BCM-I-KEY .................... ...38
Description ........................................................... ...38
DTC Logic ...............................................................38
Diagnosis Procedure ..............................................38
P1610 LOCK MODE ..........................................39
Description ........................................................... ...39
DTC Logic ...............................................................39
Diagnosis Procedure ..............................................39
POWER SUPPLY AND GROUND CIRCUIT .....40
INTELLIGENT KEY UNIT ...................................... ...40
INTELLIGENT KEY UNIT : Diagnosis Procedure ...40
BCM ........................................................................ ...40
BCM : Diagnosis Procedure ...................................40
KEY CYLINDER SWITCH .................................42
Description ........................................................... ...42
Component Function Check ...................................42
Diagnosis Procedure ..............................................42
IGNITION KNOB SWITCH .................................44
Ignition Knob Switch Check ................................. ...44
HOOD SWITCH .................................................46
Diagnosis Procedure ..............................................46
HORN FUNCTION .............................................48
Symptom Table ................................................... ...48
VEHICLE SECURITY INDICATOR ....................49
Description ........................................................... ...49
Component Function Check .................................49
Diagnosis Procedure ............................................ ...49
ECU DIAGNOSIS .......................................51
BCM (BODY CONTROL MODULE) ............... ...51
Reference Value .................................................. ...51
Terminal Layout ......................................................53
Physical Values .......................................................53
Wiring Diagram - VEHICLE SECURITY SYSTEM ...59
Wiring Diagram - IVIS .............................................70
Fail Safe .................................................................78
DTC Inspection Priority Chart ...............................79
DTC Index ..............................................................79
INTELLIGENT KEY UNIT ..................................81
Reference Value - Intelligent Key Unit ................. ...81
Reference Value - Steering Lock Solenoid .............84
Wiring Diagram - INTELLIGENT KEY SYSTEM/
ENGINE START FUNCTION - ................................
85
Fail Safe .................................................................96
DTC Inspection Priority Chart ...............................97
DTC Index ..............................................................97
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) .................
98
Reference Value .................................................. ...98
Terminal Layout ....................................................100
Physical Values .....................................................100
Wiring Diagram .....................................................105
Fail Safe ...............................................................108
DTC Index ............................................................110
SYMPTOM DIAGNOSIS ...........................111
INTELLIGENT KEY SYSTEM/ENGINE
START FUNCTION SYMPTOMS ................... ..
111
Symptom Table .................................................... .111
VEHICLE SECURITY SYSTEM SYMPTOMS ..112
Symptom Table .....................................................112
NISSAN VEHICLE IMMOBILIZER SYSTEM-
NATS SYMPTOMS ...........................................
113
Symptom Table .................................................... .113
PRECAUTION ...........................................114
PRECAUTIONS .............................................. ..114
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
114
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ................................
114
ON-VEHICLE REPAIR ..............................116
INTELLIGENT KEY UNIT ............................... ..116
Removal and Installation .......................................116
Revision: March 2010 2008 QX56