2004 INFINITI FX35 steering

INSTRUMENT PANEL ASSEMBLY
IP-15
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IP
Revision: 2004 November 2004 FX35/FX45
(T) Cluster Lid C
1. Insert a remover into gap between instrument panel and pad,
pull back to your side, and disconnect metal clips below.
2. Disconnect harness connectors, and remove cluster lid C.
CAUTION:
Cover surroundings with cloth to avoid scratches or damages.
(U) Display Unit and Audio Unit
1. Remove screws with power tool.
2. Disconnect harness connector, and remove display unit and
audio unit.
CAUTION:
Unit is heavy, so be careful not to pinch your fingers when
working.
(V) Front Defroster Grille (LH/RH)
Insert a remover into gaps between front defroster grille (LH/RH) and
instrument panel and pad, lift front defroster grille up, and remove
front defroster grille (LH/RH).
(W) Combination Meter Bracket
1. Remove bolts.
2. The installation bolts of the harness clip and steering column
assembly is removed, steering column assembly is pulled back-
ward, and set combination meter bracket free from the instru-
ment panel and pad. Refer to PS-12, "
STEERING COLUMN" .
PIIA4994E
PIIA5008E
PIIA5009E
PIIA5010E

LAN-1
LAN SYSTEM
K ELECTRICAL
CONTENTS
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SECTION LAN
A
B
LAN
Revision: 2004 November 2004 FX35/FX45
LAN SYSTEM
CAN
PRECAUTIONS .......................................................... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
Precautions When Using CONSULT-II ..................... 4
CHECK POINTS FOR USING CONSULT-II ......... 4
Precautions For Trouble Diagnosis .......................... 4
CAN SYSTEM ....................................................... 4
Precautions For Harness Repair .............................. 5
CAN SYSTEM ....................................................... 5
CAN COMMUNICATION ............................................ 6
System Description .................................................. 6
CAN Communication Unit ........................................ 6
TYPE 1/TYPE2 ..................................................... 6
TYPE 3 .................................................................. 9
TYPE 4/TYPE5 ................................................... 13
TYPE 6 ................................................................ 16
CAN SYSTEM (TYPE 1) ........................................... 21
System Description ................................................ 21
Component Parts and Harness Connector Location ... 21
Wiring Diagram - CAN - ......................................... 22
Work Flow .............................................................. 24
CHECK SHEET ................................................... 26
CHECK SHEET RESULTS (EXAMPLE) ............. 28
Circuit Check Between TCM and Data Link Con-
nector ..................................................................... 41
Circuit Check Between Data Link Connector and
Unified Meter and A/C Amp. .................................. 41
Circuit Check Between Unified Meter and A/C Amp.
and ABS Actuator and Electric Unit (Control Unit) ... 42
ECM Circuit Check ................................................. 42
TCM Circuit Check ................................................. 43
Display Unit Circuit Check ...................................... 43
Data Link Connector Circuit Check ........................ 44
BCM Circuit Check ................................................. 44
Steering Angle Sensor Circuit Check ..................... 45
Unified Meter and A/C Amp. Circuit Check ............ 45
ABS Actuator and Electric Unit (Control Unit) Circuit
Check ..................................................................... 46IPDM E/R Circuit Check ......................................... 46
CAN Communication Circuit Check ........................ 47
IPDM E/R Ignition Relay Circuit Check .................. 51
Component Inspection ............................................ 51
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
TION .................................................................... 51
CAN SYSTEM (TYPE 2) ........................................... 52
System Description ................................................. 52
Component Parts and Harness Connector Location ... 52
Wiring Diagram - CAN - .......................................... 53
Work Flow ............................................................... 55
CHECK SHEET ................................................... 57
CHECK SHEET RESULTS (EXAMPLE) ............. 59
Circuit Check Between TCM and Data Link Con-
nector ...................................................................... 74
Circuit Check Between Data Link Connector and
Unified Meter and A/C Amp. ................................... 74
Circuit Check Between Unified Meter and A/C Amp.
and ABS Actuator and Electric Unit (Control Unit) ... 75
Circuit Check Between ABS Actuator and Electric
Unit (Control Unit) and Driver Seat Control Unit ..... 76
ECM Circuit Check ................................................. 76
TCM Circuit Check ................................................. 77
Display Unit Circuit Check ...................................... 77
Data Link Connector Circuit Check ........................ 78
BCM Circuit Check ................................................. 78
Steering Angle Sensor Circuit Check ..................... 79
Unified Meter and A/C Amp. Circuit Check ............ 79
ABS Actuator and Electric Unit (Control Unit) Circuit
Check ..................................................................... 80
Driver Seat Control Unit Circuit Check ................... 80
IPDM E/R Circuit Check ......................................... 81
CAN Communication Circuit Check ........................ 82
IPDM E/R Ignition Relay Circuit Check .................. 86
Component Inspection ............................................ 86
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
TION .................................................................... 86
CAN SYSTEM (TYPE 3) ........................................... 87
System Description ................................................. 87
Component Parts and Harness Connector Location ... 87

LAN-2Revision: 2004 November 2004 FX35/FX45Schematic ............................................................... 88
Wiring Diagram - CAN - .......................................... 89
Work Flow ............................................................... 92
CHECK SHEET ................................................... 94
CHECK SHEET RESULTS (EXAMPLE) ............. 97
Circuit Check Between TCM and Data Link Con-
nector ....................................................................116
Circuit Check Between Data Link Connector and
Unified Meter and A/C Amp. .................................117
Circuit Check Between Unified Meter and A/C Amp.
and ABS Actuator and Electric Unit (Control Unit) .117
Circuit Check Between ABS Actuator and Electric
Unit (Control Unit) and Driver Seat Control Unit ...118
ECM Circuit Check ...............................................119
TCM Circuit Check ...............................................119
Display Control Unit Circuit Check ........................120
Low Tire Pressure Warning Control Unit Circuit
Check ...................................................................120
ICC Unit Circuit Check ..........................................121
Intelligent Key Unit Circuit Check .........................121
Data Link Connector Circuit Check .......................122
BCM Circuit Check ...............................................122
Steering Angle Sensor Circuit Check ...................123
Unified Meter and A/C Amp. Circuit Check ...........123
ICC Sensor Circuit Check .....................................124
ABS Actuator and Electric Unit (Control Unit) Circuit
Check ...................................................................124
Driver Seat Control Unit Circuit Check .................125
IPDM E/R Circuit Check .......................................126
CAN Communication Circuit Check ......................127
IPDM E/R Ignition Relay Circuit Check .................132
Component Inspection ..........................................132
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
TION ..................................................................132
CAN SYSTEM (TYPE 4) .........................................133
System Description ...............................................133
Component Parts and Harness Connector Location .133
Schematic .............................................................134
Wiring Diagram - CAN - ........................................135
Work Flow .............................................................138
CHECK SHEET .................................................140
CHECK SHEET RESULTS (EXAMPLE) ...........142
Circuit Check Between TCM and Data Link Con-
nector ....................................................................156
Circuit Check Between Data Link Connector and
Unified Meter and A/C Amp. .................................156
Circuit Check Between Unified Meter and A/C Amp.
and ABS Actuator and Electric Unit (Control Unit) .157
ECM Circuit Check ...............................................157
TCM Circuit Check ...............................................158
Display Unit Circuit Check ....................................158
AWD Control Unit Circuit Check ...........................159
Data Link Connector Circuit Check .......................159
BCM Circuit Check ...............................................160
Steering Angle Sensor Circuit Check ...................160
Unified Meter and A/C Amp. Circuit Check ...........161
ABS Actuator and Electric Unit (Control Unit) Circuit
Check ...................................................................161
IPDM E/R Circuit Check .......................................162CAN Communication Circuit Check ......................163
IPDM E/R Ignition Relay Circuit Check .................166
Component Inspection ..........................................166
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
TION ..................................................................166
CAN SYSTEM (TYPE 5) ..........................................167
System Description ...............................................167
Component Parts and Harness Connector Location .167
Schematic .............................................................168
Wiring Diagram - CAN - ........................................169
Work Flow .............................................................172
CHECK SHEET .................................................174
CHECK SHEET RESULTS (EXAMPLE) ............176
Circuit Check Between TCM and Data Link Con-
nector ....................................................................192
Circuit Check Between Data Link Connector and
Unified Meter and A/C Amp. .................................192
Circuit Check Between Unified Meter and A/C Amp.
and ABS Actuator and Electric Unit (Control Unit) .193
Circuit Check Between ABS Actuator and Electric
Unit (Control Unit) and Driver Seat Control Unit ...194
ECM Circuit Check ................................................194
TCM Circuit Check ................................................195
Display Unit Circuit Check ....................................195
AWD Control Unit Circuit Check ...........................196
Data Link Connector Circuit Check .......................196
BCM Circuit Check ................................................197
Steering Angle Sensor Circuit Check ....................197
Unified Meter and A/C Amp. Circuit Check ...........198
ABS Actuator and Electric Unit (Control Unit) Circuit
Check ....................................................................198
Driver Seat Control Unit Circuit Check ..................199
IPDM E/R Circuit Check ........................................200
CAN Communication Circuit Check ......................200
IPDM E/R Ignition Relay Circuit Check .................205
Component Inspection ..........................................205
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
TION ..................................................................205
CAN SYSTEM (TYPE 6) ..........................................206
System Description ...............................................206
Component Parts and Harness Connector Location .206
Schematic .............................................................207
Wiring Diagram - CAN - ........................................208
Work Flow .............................................................211
CHECK SHEET .................................................213
CHECK SHEET RESULTS (EXAMPLE) ............216
Circuit Check Between TCM and Data Link Con-
nector ....................................................................237
Circuit Check Between Data Link Connector and
Unified Meter and A/C Amp. .................................238
Circuit Check Between Unified Meter and A/C Amp.
and ABS Actuator and Electric Unit (Control Unit) .238
Circuit Check Between ABS Actuator and Electric
Unit (Control Unit) and Driver Seat Control Unit ...239
ECM Circuit Check ................................................240
TCM Circuit Check ................................................240
Display Control Unit Circuit Check ........................241
Low Tire Pressure Warning Control Unit Circuit
Check ....................................................................241

LAN-3
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LAN
Revision: 2004 November 2004 FX35/FX45AWD Control Unit Circuit Check ........................... 242
ICC Unit Circuit Check ......................................... 242
Intelligent Key Unit Circuit Check ......................... 243
Data Link Connector Circuit Check ...................... 243
BCM Circuit Check ............................................... 244
Steering Angle Sensor Circuit Check ................... 244
Unified Meter and A/C Amp. Circuit Check .......... 245
ICC Sensor Circuit Check .................................... 245
ABS Actuator and Electric Unit (Control Unit) Circuit Check ...................................................................246
Driver Seat Control Unit Circuit Check .................246
IPDM E/R Circuit Check .......................................247
CAN Communication Circuit Check ......................248
IPDM E/R Ignition Relay Circuit Check ................253
Component Inspection ..........................................253
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
TION ..................................................................253

LAN-8
[CAN]
CAN COMMUNICATION
Revision: 2004 November 2004 FX35/FX45
Position light request signal R T R R
Low beam request signal T R
Low beam status signal RT
High beam request signal T R R
High beam status signal RT
Front fog light request signal T R
Day time running light request signal T R
Turn LED burnout status signal R T
Vehicle speed signalRT
RRRR T R
Sleep wake up signal T R R
Door switch signal R T R R R
Turn indicator signal T R
Key fob ID signal T R
Key fob door unlock signal T R
Oil pressure switch signalRT
TR
Buzzer output signal T R
Fuel level sensor signal R T
Fuel level low warning signal R T
ASCD SET lamp signal T R
ASCD CRUISE lamp signal T R
Malfunction indicator lamp signal T R
ASCD operation signal T R
ASCD OD cancel request signal T R
Front wiper request signal T R
Front wiper stop position signal R T
Rear window defogger switch signal T R
Rear window defogger control signal R R R T
Hood switch signal R T
Theft warning horn request signal T R
Horn chirp signal T R
Steering angle sensor signal T R
ABS warning lamp signalRT
VDC OFF indicator lamp signal R T
SLIP indicator lamp signalRT
Brake warning lamp signal R T
System setting signalTR R
RT T
A/T CHECK indicator lamp signal T RSignals ECM TCMDis-
play
unitBCMSteer-
ing
angle
sensorUnified
meter
and
A/C
amp.ABS
actua-
tor and
electric
unit
(con-
trol
unit)Driver
seat
control
unitIPDM
E/R

CAN COMMUNICATION
LAN-11
[CAN]
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LAN
Revision: 2004 November 2004 FX35/FX45
Turn LED burnout status
signalRT
Vehicle speed signalRRT
RRRR RR T R R
Sleep wake up signalTR R
TR
Door switch signal R R T R R R
Turn indicator signal T R
Key fob ID signal T R
Key fob door unlock sig-
nalTR
Oil pressure switch sig-
nalRT
TR
Buzzer output signalTR
TR
TR
Fuel level sensor signal R T
Fuel level low warning
signalRT
ASCD SET lamp signal T R
ASCD CRUISE lamp sig-
nalTR
Malfunctioning indicator
lamp signalTR
ICC operation signal R T
Front wiper request sig-
nalRT R
Front wiper stop position
signalRT
Rear window defogger
switch signalTR
Rear window defogger
control signalRR R T
Hood switch signal R T
Theft warning horn
request signalTR
Horn chirp signal T R
Steering angle sensor
signalTR
Tire pressure signal T R
Tire pressure data signal R T
ABS warning lamp signal R R TSignals ECM TCMDis-
play
con-
trol
unitLow
tire
pres-
sure
warn-
ing
con-
trol
unitICC
unitIntelli-
gent
Key
unitBCMSteer-
ing
angle
sen-
sorUni-
fied
meter
and
A/C
amp.ICC
sen-
sorABS
actu-
ator
and
elec-
tric
unit
(con-
trol
unit)Driver
seat
con-
trol
unitIPDM
E/R

LAN-12
[CAN]
CAN COMMUNICATION
Revision: 2004 November 2004 FX35/FX45
VDC OFF indicator lamp
signalRRT
SLIP indicator lamp sig-
nalRT
Brake warning lamp sig-
nalRT
System setting signalTR R
RT T
Distance to empty signal R T
Parking brake switch sig-
nalRT
Door lock/unlock request
signalTR
Door lock/unlock status
signalRT
Starter permission signal T R
Back door open request
signalTR
Power window open
request signalTR
Alarm request signal T R
Key warning signal T R
ICC sensor signal R T
ICC warning lamp signal T R
ICC system display sig-
nalTR
Current gear position sig-
nalTR R
Steering switch signal T R
ASCD operation signal T R
ASCD OD cancel
request signalTR
ICC OD cancel request
signalRR T
A/T CHECK indicator
lamp signalTR
A/T position indicator
lamp signalTR
A/T shift schedule
change demand signalRT
Manual mode signal R T
Not manual mode signal R TSignals ECM TCMDis-
play
con-
trol
unitLow
tire
pres-
sure
warn-
ing
con-
trol
unitICC
unitIntelli-
gent
Key
unitBCMSte er-
ing
angle
sen-
sorUni-
fied
meter
and
A/C
amp.ICC
sen-
sorABS
actu-
ator
and
elec-
tric
unit
(con-
trol
unit)Driver
seat
con-
trol
unitIPDM
E/R

CAN COMMUNICATION
LAN-15
[CAN]
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LAN
Revision: 2004 November 2004 FX35/FX45
Key fob door unlock signal T R
Oil pressure switch signalRT
TR
Buzzer output signal T R
Fuel level sensor signal R T
Fuel level low warning signal R T
ASCD SET lamp signal T R
ASCD CRUISE lamp signal T R
Malfunction indicator lamp signal T R
Front wiper request signal T R
Front wiper stop position signal R T
Rear window defogger switch signal T R
Rear window defogger control signal R R R T
Hood switch signal R T
Theft warning horn request signal T R
Horn chirp signal T R
Steering angle sensor signal T R
ABS warning lamp signalRT
VDC OFF indicator lamp signal R T
SLIP indicator lamp signalRT
Brake warning lamp signalRT
System setting signalTR R
RT T
AWD warning lamp signal T R
Distance to empty signal R T
Parking brake switch signal R R T
ASCD operation signal T R
ASCD OD cancel request signal T R
A/T CHECK indicator lamp signal T R
A/T position indicator lamp signal T R
A/T shift schedule change demand signal R T
Manual mode signal R T
Not manual mode signal R T
Manual mode shift up signal R T
Manual mode shift down signal R T
Manual mode indicator signal T R
Snow mode switch signal R T
Current gear position signal* R TSignals ECM TCMDis-
play
unitAW D
con-
trol
unitBCMSte er-
ing
angle
sensorUni-
fied
meter
and
A/C
amp.ABS
actua-
tor
and
elec-
tric
unit
(con-
trol
unit)Driver
seat
con-
trol
unitIPDM
E/R