2011 INFINITI QX56 TPMS

LAN-2
ITS Communication Circuit .....................................58
MAIN LINE BETWEEN ABS AND DLC CIR-
CUIT ...................................................................
60
Diagnosis Procedure ........................................... ...60
MAIN LINE BETWEEN DLC AND E-SUS CIR-
CUIT ...................................................................
61
Diagnosis Procedure ........................................... ...61
MAIN LINE BETWEEN E-SUS AND ADP CIR-
CUIT ...................................................................
62
Diagnosis Procedure ........................................... ...62
MAIN LINE BETWEEN ADP AND PWBD CIR-
CUIT ...................................................................
63
Diagnosis Procedure ........................................... ...63
MAIN LINE BETWEEN RDR-R AND RDR-L
CIRCUIT .............................................................
64
Diagnosis Procedure ........................................... ...64
MAIN LINE BETWEEN RDR-L AND LANE
CIRCUIT .............................................................
65
Diagnosis Procedure ........................................... ...65
MAIN LINE BETWEEN LANE AND APA CIR-
CUIT ...................................................................
67
Diagnosis Procedure ........................................... ...67
ECM BRANCH LINE CIRCUIT ..........................68
Diagnosis Procedure ........................................... ...68
4WD BRANCH LINE CIRCUIT ..........................69
Diagnosis Procedure ........................................... ...69
ABS BRANCH LINE CIRCUIT ..........................70
Diagnosis Procedure ........................................... ...70
TCM BRANCH LINE CIRCUIT ..........................71
Diagnosis Procedure ........................................... ...71
A-BAG BRANCH LINE CIRCUIT ......................72
Diagnosis Procedure ........................................... ...72
AFS BRANCH LINE CIRCUIT ...........................73
Diagnosis Procedure ........................................... ...73
AV BRANCH LINE CIRCUIT .............................74
Diagnosis Procedure ........................................... ...74
BCM BRANCH LINE CIRCUIT ..........................75
Diagnosis Procedure ........................................... ...75
CGW BRANCH LINE CIRCUIT (CAN COM-
MUNICATION CIRCUIT 1) .................................
76
Diagnosis Procedure ........................................... ...76
CGW BRANCH LINE CIRCUIT (CAN COM-
MUNICATION CIRCUIT 2) .................................
77
Diagnosis Procedure ........................................... ...77
DLC BRANCH LINE CIRCUIT ..........................78
Diagnosis Procedure ............................................ ...78
HVAC BRANCH LINE CIRCUIT ........................79
Diagnosis Procedure ............................................ ...79
M&A BRANCH LINE CIRCUIT ..........................80
Diagnosis Procedure ............................................ ...80
STRG BRANCH LINE CIRCUIT ........................81
Diagnosis Procedure ............................................ ...81
TPMS BRANCH LINE CIRCUIT ........................82
Diagnosis Procedure ............................................ ...82
IPDM-E BRANCH LINE CIRCUIT .....................83
Diagnosis Procedure ............................................ ...83
ADP BRANCH LINE CIRCUIT ..........................84
Diagnosis Procedure ............................................ ...84
PSB BRANCH LINE CIRCUIT ..........................85
Diagnosis Procedure ............................................ ...85
E-SUS BRANCH LINE CIRCUIT .......................86
Diagnosis Procedure ............................................ ...86
ICC BRANCH LINE CIRCUIT ............................87
Diagnosis Procedure ............................................ ...87
PWBD BRANCH LINE CIRCUIT .......................88
Diagnosis Procedure ............................................ ...88
RDR-R BRANCH LINE CIRCUIT ......................89
Diagnosis Procedure ............................................ ...89
RDR-L BRANCH LINE CIRCUIT .......................90
Diagnosis Procedure ............................................ ...90
LANE BRANCH LINE CIRCUIT ........................91
Diagnosis Procedure ............................................ ...91
APA BRANCH LINE CIRCUIT ..........................92
Diagnosis Procedure ............................................ ...92
LASER BRANCH LINE CIRCUIT ......................93
Diagnosis Procedure ............................................ ...93
CAN COMMUNICATION CIRCUIT ...................94
Diagnosis Procedure ............................................ ...94
CAN COMMUNICATION CIRCUIT 1 ................96
Diagnosis Procedure ............................................ ...96
CAN COMMUNICATION CIRCUIT 2 ................98
Diagnosis Procedure ............................................ ...98
ITS COMMUNICATION CIRCUIT .....................100
Diagnosis Procedure ............................................ .100
CAN GATEWAY
PRECAUTION ............... ............................
102
PRECAUTIONS .............................................. ..102
Revision: 2010 May2011 QX56

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Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................
..
102
SYSTEM DESCRIPTION ...........................103
COMPONENT PARTS ................................... ..103
Component Parts Location .................................. ..103
SYSTEM ...........................................................104
System Description ............................................. ..104
DIAGNOSIS SYSTEM (CAN GATEWAY) .......105
CONSULT-III Function ........................................ ..105
ECU DIAGNOSIS INFORMATION ............106
CAN GATEWAY ............................................. ..106
Reference Value ................................................. ..106
DTC Inspection Priority Chart .............................106
DTC Index ............................................................106
WIRING DIAGRAM ....................................108
CAN GATEWAY SYSTEM ............................. ..108
Wiring Diagram ................................................... ..108
BASIC INSPECTION .................................110
ADDITIONAL SERVICE WHEN REPLACING
CAN GATEWAY ............................................. ..
110
Description .......................................................... ..110
Work Procedure ....................................................110
CONFIGURATION (CAN GATEWAY) .............111
Description .......................................................... ..111
Work Procedure ....................................................111
DTC/CIRCUIT DIAGNOSIS .......................113
U1000 CAN COMM CIRCUIT ......................... ..113
Description .......................................................... ..113
DTC Logic .............................................................113
Diagnosis Procedure .............................................113
U1010 CONTROL UNIT (CAN) ........................114
Description .......................................................... ..114
DTC Logic .............................................................114
Diagnosis Procedure .............................................114
B2600 CONFIG ERROR ..................................115
Description .......................................................... ..115
DTC Logic .............................................................115
Diagnosis Procedure .............................................115
POWER SUPPLY AND GROUND CIRCUIT ....116
Diagnosis Procedure ........................................... ..116
REMOVAL AND INSTALLATION .............117
CAN GATEWAY ............................................. ..117
Removal and Installation ..................................... ..117
CAN SYSTEM (TYPE 1)
DTC/CIRCUIT DIAGNOSIS .......................
118
MAIN LINE BETWEEN ABS AND DLC CIR-
CUIT ................................................................
118
Diagnosis Procedure ........................................... ..118
MAIN LINE BETWEEN DLC AND E-SUS CIR-
CUIT ................................................................
119
Diagnosis Procedure .............................................119
MAIN LINE BETWEEN E-SUS AND ADP CIR-
CUIT ................................................................
120
Diagnosis Procedure .............................................120
ECM BRANCH LINE CIRCUIT .......................121
Diagnosis Procedure .............................................121
ABS BRANCH LINE CIRCUIT ........................122
Diagnosis Procedure .............................................122
TCM BRANCH LINE CIRCUIT ........................123
Diagnosis Procedure .............................................123
A-BAG BRANCH LINE CIRCUIT ....................124
Diagnosis Procedure .............................................124
AV BRANCH LINE CIRCUIT ..........................125
Diagnosis Procedure .............................................125
BCM BRANCH LINE CIRCUIT .......................126
Diagnosis Procedure .............................................126
DLC BRANCH LINE CIRCUIT ........................127
Diagnosis Procedure .............................................127
HVAC BRANCH LINE CIRCUIT .....................128
Diagnosis Procedure .............................................128
M&A BRANCH LINE CIRCUIT .......................129
Diagnosis Procedure .............................................129
STRG BRANCH LINE CIRCUIT .....................130
Diagnosis Procedure .............................................130
TPMS BRANCH LINE CIRCUIT .....................131
Diagnosis Procedure .............................................131
IPDM-E BRANCH LINE CIRCUIT ...................132
Diagnosis Procedure .............................................132
ADP BRANCH LINE CIRCUIT ........................133
Diagnosis Procedure .............................................133
E-SUS BRANCH LINE CIRCUIT ....................134
Diagnosis Procedure .............................................134
PWBD BRANCH LINE CIRCUIT ....................135
Diagnosis Procedure .............................................135
CAN COMMUNICATION CIRCUIT .................136
Diagnosis Procedure .............................................136
Revision: 2010 May2011 QX56

LAN-4
CAN SYSTEM (TYPE 2)
DTC/CIRCUIT DIAGNOSIS ...................... ..
138
MAIN LINE BETWEEN ABS AND DLC CIR-
CUIT ................................................................ .
138
Diagnosis Procedure ........................................... ..138
MAIN LINE BETWEEN ADP AND PWBD CIR-
CUIT .................................................................
139
Diagnosis Procedure ........................................... ..139
MAIN LINE BETWEEN RDR-R AND RDR-L
CIRCUIT ...........................................................
140
Diagnosis Procedure ........................................... ..140
MAIN LINE BETWEEN RDR-L AND LANE
CIRCUIT ...........................................................
141
Diagnosis Procedure ........................................... ..141
MAIN LINE BETWEEN LANE AND APA CIR-
CUIT .................................................................
143
Diagnosis Procedure ........................................... ..143
ECM BRANCH LINE CIRCUIT ........................144
Diagnosis Procedure ........................................... ..144
ABS BRANCH LINE CIRCUIT ........................145
Diagnosis Procedure ........................................... ..145
TCM BRANCH LINE CIRCUIT ........................146
Diagnosis Procedure ........................................... ..146
A-BAG BRANCH LINE CIRCUIT ....................147
Diagnosis Procedure ........................................... ..147
AFS BRANCH LINE CIRCUIT .........................148
Diagnosis Procedure ........................................... ..148
AV BRANCH LINE CIRCUIT ...........................149
Diagnosis Procedure ........................................... ..149
BCM BRANCH LINE CIRCUIT ........................150
Diagnosis Procedure ........................................... ..150
CGW BRANCH LINE CIRCUIT (CAN COM-
MUNICATION CIRCUIT 1) ...............................
151
Diagnosis Procedure ........................................... ..151
CGW BRANCH LINE CIRCUIT (CAN COM-
MUNICATION CIRCUIT 2) ...............................
152
Diagnosis Procedure ........................................... ..152
DLC BRANCH LINE CIRCUIT .........................153
Diagnosis Procedure ........................................... ..153
HVAC BRANCH LINE CIRCUIT ......................154
Diagnosis Procedure ........................................... ..154
M&A BRANCH LINE CIRCUIT ........................155
Diagnosis Procedure ........................................... ..155
STRG BRANCH LINE CIRCUIT ......................156
Diagnosis Procedure ............................................ .156
TPMS BRANCH LINE CIRCUIT .......................157
Diagnosis Procedure ............................................ .157
IPDM-E BRANCH LINE CIRCUIT ....................158
Diagnosis Procedure ............................................ .158
ADP BRANCH LINE CIRCUIT .........................159
Diagnosis Procedure ............................................ .159
PSB BRANCH LINE CIRCUIT .........................160
Diagnosis Procedure ............................................ .160
E-SUS BRANCH LINE CIRCUIT ......................161
Diagnosis Procedure ............................................ .161
ICC BRANCH LINE CIRCUIT ...........................162
Diagnosis Procedure ............................................ .162
PWBD BRANCH LINE CIRCUIT ......................163
Diagnosis Procedure ............................................ .163
RDR-R BRANCH LINE CIRCUIT .....................164
Diagnosis Procedure ............................................ .164
RDR-L BRANCH LINE CIRCUIT ......................165
Diagnosis Procedure ............................................ .165
LANE BRANCH LINE CIRCUIT .......................166
Diagnosis Procedure ............................................ .166
APA BRANCH LINE CIRCUIT .........................167
Diagnosis Procedure ............................................ .167
LASER BRANCH LINE CIRCUIT .....................168
Diagnosis Procedure ............................................ .168
CAN COMMUNICATION CIRCUIT 1 ...............169
Diagnosis Procedure ............................................ .169
CAN COMMUNICATION CIRCUIT 2 ...............171
Diagnosis Procedure ............................................ .171
ITS COMMUNICATION CIRCUIT .....................173
Diagnosis Procedure ............................................ .173
CAN SYSTEM (TYPE 3)
DTC/CIRCUIT DIAGNOSIS .......................
175
MAIN LINE BETWEEN ABS AND DLC CIR-
CUIT ................................................................ ..
175
Diagnosis Procedure ............................................ .175
MAIN LINE BETWEEN DLC AND E-SUS CIR-
CUIT ..................................................................
176
Diagnosis Procedure ............................................ .176
MAIN LINE BETWEEN E-SUS AND ADP CIR-
CUIT ..................................................................
177
Diagnosis Procedure ............................................ .177
ECM BRANCH LINE CIRCUIT .........................178
Revision: 2010 May2011 QX56

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Diagnosis Procedure ...........................................
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178
4WD BRANCH LINE CIRCUIT .........................179
Diagnosis Procedure ........................................... ..179
ABS BRANCH LINE CIRCUIT .........................180
Diagnosis Procedure ........................................... ..180
TCM BRANCH LINE CIRCUIT .........................181
Diagnosis Procedure ........................................... ..181
A-BAG BRANCH LINE CIRCUIT .....................182
Diagnosis Procedure ........................................... ..182
AV BRANCH LINE CIRCUIT ............................183
Diagnosis Procedure ........................................... ..183
BCM BRANCH LINE CIRCUIT ........................184
Diagnosis Procedure ........................................... ..184
DLC BRANCH LINE CIRCUIT .........................185
Diagnosis Procedure ........................................... ..185
HVAC BRANCH LINE CIRCUIT ......................186
Diagnosis Procedure ........................................... ..186
M&A BRANCH LINE CIRCUIT ........................187
Diagnosis Procedure ........................................... ..187
STRG BRANCH LINE CIRCUIT .......................188
Diagnosis Procedure ........................................... ..188
TPMS BRANCH LINE CIRCUIT .......................189
Diagnosis Procedure ........................................... ..189
IPDM-E BRANCH LINE CIRCUIT ....................190
Diagnosis Procedure ........................................... ..190
ADP BRANCH LINE CIRCUIT .........................191
Diagnosis Procedure ........................................... ..191
E-SUS BRANCH LINE CIRCUIT ......................192
Diagnosis Procedure ........................................... ..192
PWBD BRANCH LINE CIRCUIT ......................193
Diagnosis Procedure ........................................... ..193
CAN COMMUNICATION CIRCUIT ..................194
Diagnosis Procedure ........................................... ..194
CAN SYSTEM (TYPE 4)
DTC/CIRCUIT DIAGNOSIS .......................
196
MAIN LINE BETWEEN ABS AND DLC CIR-
CUIT ................................................................ ..
196
Diagnosis Procedure ........................................... ..196
MAIN LINE BETWEEN ADP AND PWBD CIR-
CUIT ..................................................................
197
Diagnosis Procedure ........................................... ..197
MAIN LINE BETWEEN RDR-R AND RDR-L
CIRCUIT ......................................................... ..
198
Diagnosis Procedure ........................................... ..198
MAIN LINE BETWEEN RDR-L AND LANE
CIRCUIT ..........................................................
199
Diagnosis Procedure ........................................... ..199
MAIN LINE BETWEEN LANE AND APA CIR-
CUIT ................................................................
201
Diagnosis Procedure .............................................201
ECM BRANCH LINE CIRCUIT .......................202
Diagnosis Procedure .............................................202
4WD BRANCH LINE CIRCUIT .......................203
Diagnosis Procedure ........................................... ..203
ABS BRANCH LINE CIRCUIT ........................204
Diagnosis Procedure .............................................204
TCM BRANCH LINE CIRCUIT ........................205
Diagnosis Procedure .............................................205
A-BAG BRANCH LINE CIRCUIT ....................206
Diagnosis Procedure .............................................206
AFS BRANCH LINE CIRCUIT ........................207
Diagnosis Procedure .............................................207
AV BRANCH LINE CIRCUIT ..........................208
Diagnosis Procedure .............................................208
BCM BRANCH LINE CIRCUIT .......................209
Diagnosis Procedure .............................................209
CGW BRANCH LINE CIRCUIT (CAN COM-
MUNICATION CIRCUIT 1) ..............................
210
Diagnosis Procedure .............................................210
CGW BRANCH LINE CIRCUIT (CAN COM-
MUNICATION CIRCUIT 2) ..............................
211
Diagnosis Procedure .............................................211
DLC BRANCH LINE CIRCUIT ........................212
Diagnosis Procedure .............................................212
HVAC BRANCH LINE CIRCUIT .....................213
Diagnosis Procedure .............................................213
M&A BRANCH LINE CIRCUIT .......................214
Diagnosis Procedure .............................................214
STRG BRANCH LINE CIRCUIT .....................215
Diagnosis Procedure .............................................215
TPMS BRANCH LINE CIRCUIT .....................216
Diagnosis Procedure .............................................216
IPDM-E BRANCH LINE CIRCUIT ...................217
Diagnosis Procedure .............................................217
ADP BRANCH LINE CIRCUIT ........................218
Diagnosis Procedure .............................................218
Revision: 2010 May2011 QX56

LAN
HOW TO USE THIS SECTIONLAN-23
< HOW TO USE THIS MANUAL > [CAN]
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HOW TO USE THIS MANUAL
HOW TO USE THIS SECTION
CautionINFOID:0000000006220525
 This section describes information peculiar to a vehicle and inspection procedures.
 For trouble diagnosis procedure, refer to
LAN-18, "
Trouble Diagnosis Procedure".
Abbreviation ListINFOID:0000000006220526
Unit name abbreviations in CONSULT-III CAN diagnosis and in this section are as per the following list.
Abbreviation Unit name
4WD Transfer control unit
A-BAG Air bag diagnosis sensor unit ABS ABS actuator and electric unit (control unit)
ADP Driver seat control unit AFS AFS control unitAPA Accelerator pedal actuator AV AV control unit
BCM BCM
CGW CAN gateway DLC Data link connector
E-SUS Air levelizer control module ECM ECM
HVAC A/C auto amp. ICC ADAS control unit
IPDM-E IPDM E/R LANE Lane camera unit
LASER ICC sensor M&A Combination meter
PSB Pre-crash seat belt control unit (driver side)
PWBD Automatic back door control module
RDR-L Side radar LH
RDR-R Side radar RH STRG Steering angle sensor TCM TCM
TPMS Low tire pressure warning control unit
Revision: 2010 May2011 QX56

LAN-28
< SYSTEM DESCRIPTION >[CAN]
SYSTEM
Check CAN system type from the vehicle shape and equipment.
CAN COMMUNICATION SYSTEM : CA
N Communication Signal ChartINFOID:0000000006220533
Refer to LAN-17, "How to Use CAN Communication Signal Chart" for how to use CAN communication signal
chart.
T: Transmit R: Receive
1. ICC sensor
A. With ICC system
JSMIA0342ZZ
Signal nameECM
4WD
ABS
TCM
A-BAG
AFSAV
BCM
CGW
HVAC
M&A
STRG
TPMS
IPDM-E ADP
PSB
E-SUS ICC
PWBD
A/C compressor request
signal TR
Accelerator pedal position
signal TRRR
R
ASCD OD cancel request
signal TR
ASCD operation signal T R
ASCD status signal T R
Closed throttle position sig-
nal TR
R
Cooling fan speed request
signal TR
Engine and A/T integrated
control signal TR
RT
Engine coolant temperature
signal TRR
Engine restart request sig-
nal TRR
TR
Engine speed signal T R R R R R R R
Engine status signal T R R R
Engine torque signal T R
Fuel consumption monitor
signal TRR
ICC brake switch signal T R
ICC prohibition signal T R
ICC steering switch signal T R
Malfunctioning indicator
lamp signal TR
N idle instruction signal TR
RT
Revision: 2010 May2011 QX56

LAN
SYSTEMLAN-29
< SYSTEM DESCRIPTION > [CAN]
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Power generation com-
mand value signal
TR
Snow mode signal T R
Stop lamp switch signal T
R
RT
RT R
Wide open throttle position
signal TR
ATP warning lamp signal T R
4WD malfunction signal T R
4WD mode indicator signal T R
4WD warning lamp signal T R
Current 4WD mode signal T R R
A/T shift schedule change
demand signal TR
ABS malfunction signal R T R
ABS operation signal R T R R R
ABS warning lamp signal T R R
Brake warning lamp signal T R
Decel G sensor signal T R
Pressure sensor signal T R
Side G sensor signal T R R
Target throttle position sig-
nal RT
TCS malfunction signal R T R
TCS operation signal R T R
VDC malfunction signal R T R
VDC OFF indicator lamp
signal TR
VDC OFF switch signal T R
VDC operation signal R T R
VDC warning lamp signal T R
Vehicle speed signal RRRRRRT RRRR
RRT R RRRRRR
Yaw rate signal T R
A/T CHECK indicator lamp
signal TR R
Current gear position signal R R T R
Input speed signal R T R
Manual mode shift refusal
signal TR
N range signal T R R
Next gear position signal R T
Output shaft revolution sig-
nal RR T
R
Signal name
ECM
4WD
ABS
TCM
A-BAG AFS
AV
BCM
CGW
HVAC M&A
STRG
TPMS
IPDM-E
ADPPSB
E-SUS ICC
PWBD
Revision: 2010 May2011 QX56

LAN-30
< SYSTEM DESCRIPTION >[CAN]
SYSTEM
P range signal T R R
R range signal T R R
Shift position signal R R T R R R R R
Tow mode indicator lamp
signalTR
Pre-roll over signal T R
Pre-tensioner operation
signal TR
AFS OFF indicator lamp
signal TR
A/C switch operation signal T R
Rear window defogger
switch signal TR
System selection signal T R
System setting signal TR R
RT
RT
Automatic back door re-
quest signal TR
Back door lock status signal T R
Buzzer output signal TR
RT
Buzzer request signal TR
RT
Dimmer signal T R R
Door switch signal T R R R R
Door unlock signal T R
Front fog light request sig-
nal TR
Front wiper request signal T R R
Handle position signal T R
Headlamp washer request
signal TR
High beam request signal T R R
Horn reminder signal T R
Ignition switch ON signal TRRR
RT
Ignition switch signal T R
Interlock/PNP switch signal TR
RT
Key ID signal T R
Key switch signal T R
Key warning lamp signal T R
Low beam request signal T R Signal name
ECM
4WD
ABS
TCM
A-BAG
AFSAV
BCM
CGW
HVAC
M&A
STRG
TPMS
IPDM-E ADP
PSB
E-SUS ICC
PWBD
Revision: 2010 May2011 QX56