INFINITI QX56 2009 Factory Service Manual

LAN-42
< BASIC INSPECTION >[CAN]
DIAGNOSIS AND REPAIR WORKFLOW
Diagnosis Sheet (CAN Type 3)
INFOID:0000000003776451
JPMIA0295GB
Revision: December 20092009 QX56

LAN
DIAGNOSIS AND REPAIR WORKFLOWLAN-43
< BASIC INSPECTION > [CAN]
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G H
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K L
B A
O P
N
Diagnosis Sheet (CAN Type 4)INFOID:0000000003776452
JPMIA0299GB
Revision: December 20092009 QX56

LAN-44
< FUNCTION DIAGNOSIS >[CAN]
CAN COMMUNICATION SYSTEM
FUNCTION DIAGNOSIS
CAN COMMUNICATION SYSTEM
CAN System Specification ChartINFOID:0000000003776453
Determine CAN system type from the following specificat
ion chart. Then choose the correct diagnosis sheet.
NOTE:
Refer to LAN-14, "
Trouble Diagnosis Procedure" for how to use CAN system specification chart.
×: Applicable
VEHICLE EQUIPMENT IDENTIFICATION INFORMATION
NOTE:
Check CAN system type from the vehicle shape and equipment.
CAN Communication Signal ChartINFOID:0000000003776454
Refer to LAN-13, "How to Use CAN Communication Signal Chart" for how to use CAN communication signal
chart.
NOTE:
Refer to LAN-36, "
Abbreviation List" for the abbreviations of the connecting units.
T: Transmit R: Receive
Body type Wagon
Axle 2WD4WD
Engine VK56DE
Transmission A/T
Brake control VDC
ICC system ××
CAN system type 1234
Diagnosis sheet LAN-40
LAN-41LAN-42LAN-43
AWMIA0012GB
Signal name/Connecting unitECM
TCM
LASER ICC
ADP
AV
BCM
HVAC I-KEY M&A
STRG 4WDABS
IPDM-E
Accelerator pedal position signal T RR R R
A/C compressor request signal T R
ASCD CRUISE lamp signal T R
ASCD OD cancel request signal T R
ASCD operation signal T R
ASCD SET lamp signal T R
Battery voltage signal T R
Closed throttle position signal T RR
Cooling fan speed request signal T R
Engine coolant temperature signal T RR
Revision: December 20092009 QX56

LAN
CAN COMMUNICATION SYSTEMLAN-45
< FUNCTION DIAGNOSIS > [CAN]
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Engine speed signal
T RRR R R R R R
Engine status signal TR
Fuel consumption monitor signal TR
RT
ICC steering switch signal TR
Malfunction indicator lamp signal T R
Wide open throttle position signal T R
A/T CHECK indicato r lamp signal T R
A/T fluid temperature sensor signal T R
A/T position indicator lamp signal TR RR
A/T self-diagnosis signal R T
Current gear position signal TR R
Input speed signal R TR
Output shaft revolution signal R TR R
P range signal TR R RR
ICC sensor signal T R
Buzzer output signal TR
TR
ICC OD cancel request signal R RT
ICC operation signal R RT
ICC system display signal TR
System setting signal TRT
RTR
A/C switch/indicator signal TR
RT
A/C switch signal RT R
Blower fan motor switch signal RT
Day time running light request signal TR R
Door lock/unlock status signal TR
Door switch signal R R TR R R
Front fog light request signal TR
Front wiper request signal RT R
High beam request signal TR R
Horn chirp signal TR
Ignition switch signal RTR R
Key fob door unlock signal RT
Key fob ID signal RT
Key switch signal RT
Low beam request signal TR
Position light request signal TR R
Rear window defogger switch signal T RR
Sleep wake up signal RT R R
Theft warning horn request signal TR
Signal name/Connecting unit
ECM
TCM
LASER ICC
ADP AV
BCM
HVAC I-KEY M&A
STRG 4WD
ABS
IPDM-E
Revision: December 20092009 QX56

LAN-46
< FUNCTION DIAGNOSIS >[CAN]
CAN COMMUNICATION SYSTEM
NOTE:
CAN data of the air bag diagnosis sensor unit is not us
ed by usual service work, thus it is omitted.
Tire pressure data signal R T
Tire pressure signal R TR
Turn indicator signal TR
Buzzer output signal TR
Door lock/unlock request signal RT
Hazard request signal RT
Hazard warning lamp request signal RT
Ignition knob switch signal RT
KEY warning signal TR
LOCK warning signal TR
Panic alarm request signal RT
Power window open request signal RT
1st position switch signal R T
4th position switch signal R T
Distance to empty signal RT
Fuel level low warning signal RT
Fuel level sensor signal R T
Parking brake switch signal RT
Seat belt buckle switch signal RT
Stop lamp switch signal R T
Tow mode switch signal R T
Vehicle speed signal RRR RRR R T
RRRT
Steering angle sensor signal TR
ABS malfunction signal RT
ABS warning lamp signal RT
Brake pressure sensor signal RT
Brake warning lamp signal RT
SLIP indicator lamp signal RT
TCS malfunction signal RT
VDC malfunction signal RT
VDC OFF indicator lamp signal RRT
VDC operation signal RT
Front wiper stop position signal RT
High beam status signal R T
Hood switch signal RT
Low beam status signal R T
Rear window defogger control signal R RT
Signal name/Connecting unit
ECM
TCM
LASER ICC
ADP
AV
BCM
HVAC I-KEY M&A
STRG 4WDABS
IPDM-E
Revision: December 20092009 QX56

LAN
TROUBLE DIAGNOSISLAN-47
< FUNCTION DIAGNOSIS > [CAN]
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B A
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N
TROUBLE DIAGNOSIS
CAN Diagnostic Support MonitorINFOID:0000000003776455
Use “CAN DIAG SUPPORT MNTR” for detecting the root cause.
MONITOR ITEM LIST (CONSULT-III)
ECM
0: Error at present, 1 – 39: Error in the past (Number means the number of times the ignition switch is turned OFF→
ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
TCM
NOTE:
Replace the unit when “NG” is indicated on the “INITIAL DIAG”.
ICC Unit
NOTE:
Replace the unit when “NG” is indicated on the “INITIAL DIAG”.
ITEMCAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
ECM TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
VDC/TCS/ABS
Signal receivin
g status from the ABS actua-
tor and electric unit (control unit)
METER/M&A Signal receiving status from the combina-
tion meter
BCM/SEC Signal receiving status from the BCM
ICC Signal receiving status from the ICC unit
HVAC Not used even though indicated
TCM Signal receiving status from the TCM OKOK
or
1 – 39
*UNKWN 0
EPS Not used even though indicated
IPDM E/R Signal receiving status from the IPDM E/R OK OK
or
1 – 39
*UNKWN 0
e4WD Not used even though indicated
AWD/4WD Signal receiving status from the transfer
control unit OKOK
or
1 – 39
*UNKWN 0
ITEM CAN DIAG SUP-
PORT MNTR DescriptionNormal Error
PRSNT
TCM INITIAL DIAG Status of CAN controller
OKNG
TRANSMIT DIAG Signal transmission status
UNKWN
ECM Signal receiving status from the ECM
VDC/TCS/ABS
Signal receiving status from the ABS
actuator and electric unit (con-
trol unit)
METER/M&A Signal receiving status from the combination meter
ICC/e4WD Signal receiving status from the ICC unit
AWD/4WD Signal receiving status from the transfer control unit
Revision: December 20092009 QX56

LAN-48
< FUNCTION DIAGNOSIS >[CAN]
TROUBLE DIAGNOSIS
Driver Seat Control Unit
0: Error at present, 1 – 39: Error in the past (Number m
eans the number of times the ignition switch is turned OFF →ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
AV Control Unit
0: Error at present, 1 – 39: Error in the past (Number m eans the number of times the ignition switch is turned OFF →ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
BCM
ITEM CAN DIAG SUP-
PORT MNTR DescriptionNormal Error
PRSNT
ICC INITIAL DIAG Status of CAN controller
OKNG
TRANSMIT DIAG Signal transmission status
UNKWN
ECM
Signal receiving status from the ECM
VDC/TCS/ABS Signal receiving status from the ABS actuator and electric unit (con-
trol unit)
TCM Signal receiving status from the TCM
METER/M&A Not used even though indicated
LANE KEEP
ECM (l)
ICC SENSOR Signal receiving status from the ICC sensor OK UNKWN
STRG
Not used even though indicated
METER/M&A (l)
ERROR (l)
LANE DETEC-
TOR
TCM (l)
BCM/SEC Signal receiving status from the BCM
OK UNKWN
ITEMCAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
ADP TRANSMIT DIAG
Not used even though indicated
METER/M&A Signal receiving status from the combina-
tion meter
OKOK
or
1 – 39
*UNKWN 0
BCM/SEC Signal receiving status from the BCM
TCM Signal receiving status from the TCM
ITEMCAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
AV TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM
Signal receiving status from the ECM
METER/M&A Signal receiving status from the combina-
tion meter
BCM/SEC Signal receiving status from the BCM
HVAC Signal receiving status from the A/C auto
amp.
STRG Not used even though indicated
IPDM E/R Signal receiving status from the IPDM E/R OK OK
or
1 – 39
*UNKWN 0
TIRE-P Not used even though indicated
Revision: December 20092009 QX56

LAN
TROUBLE DIAGNOSISLAN-49
< FUNCTION DIAGNOSIS > [CAN]
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B A
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N
NOTE:
Replace the unit when “NG” is indicated on the “INITIAL DIAG”.
A/C Auto Amp.
0: Error at present, 1 – 39: Error in the past (Number means the number of times the ignition switch is turned OFF→
ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
Intelligent Key Unit
0: Error at present, 1 – 39: Error in the past (Number means the number of times the ignition switch is turned OFF→ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
Combination Meter
ITEMCAN DIAG SUP-
PORT MNTR DescriptionNormal Error
PRSNT
BCM INITIAL DIAG Status of CAN controller
OKNG
TRANSMIT DIAG Signal transmission status
UNKWN
ECM Signal receiving status from the ECM
IPDM E/R Signal receiving status from the IPDM E/R
METER/M&A Signal receiving status from the combination meter
I-KEY Not used even though indicated
ITEM
CAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
HVAC TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM Signal receiving status from the ECM
TCM Not used even though indicated
BCM/SEC Signal receiving status from the BCM OKOK
or
1 – 39
*UNKWN 0
VDC/TCS/ABS Signal receivin
g status from the ABS actua-
tor and electric unit (control unit)
IPDM E/R Not used even though indicated
DISPLAY Signal receiving status from the AV control
unit
OKOK
or
1 – 39
*UNKWN 0
I-KEY
Not used even though indicated
EPS
AWD/4WD
e4WD
ICC
LANE KEEP
TIRE-P
ITEM
CAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
I-KEY TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM
Signal receiving status from the ECM
METER/M&A Signal receiving status from the combina-
tion meter
BCM/SEC Signal receiving status from the BCM
Revision: December 20092009 QX56

LAN-50
< FUNCTION DIAGNOSIS >[CAN]
TROUBLE DIAGNOSIS
0: Error at present, 1 – 39: Error in the past (Number m
eans the number of times the ignition switch is turned OFF →ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
Transfer Control Unit
0: Error at present, 1 – 39: Error in the past (Number m eans the number of times the ignition switch is turned OFF →ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
ABS Actuator and Electric Unit (Control Unit)
CAUTION:ITEM
CAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
M&A TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM
Signal receiving status from the ECM
TCM Signal receiving status from the TCM
BCM/SEC Signal receiving status from the BCM
VDC/TCS/ABS Signal receiving stat
us from the ABS actua-
tor and electric unit (control unit)
IPDM E/R Signal receiving status from the IPDM E/R
DISPLAY Not used even though indicated
I-KEY Signal receiving status from the Intelligent
Key unit
OKOK
or
1 – 39
*UNKWN 0
EPS Not used even though indicated
AWD/4WD
e4WD
ICC Signal receiving status from the ICC unit OK OK
or
1 – 39
*UNKWN 0
LANE KEEP Not used even though indicated
TIRE-P
ITEM CAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
4WD TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM
Signal receiving status from the ECM
VDC/TCS/ABS Signal receiving stat
us from the ABS actua-
tor and electric unit (control unit)
TCM Signal receiving status from the TCM
STRG Signal receiving status from the steering an-
gle sensor
ITEMCAN DIAG SUP-
PORT MNTR DescriptionNormal Error
PRSNT
ABS INITIAL DIAG Status of CAN controller
OKNG
Caution
TRANSMIT DIAG Signal transmission status
UNKWN
ECM Signal receiving status from the ECM
TCM Signal receiving status from the TCM
METER/M&A Not used even though indicated
STRG Signal receiving status from the steering angle sensor
OK UNKWN
ICC Signal receiving status from the ICC unit
AWD/4WD Signal receiving status from the transfer control unit
Revision: December 20092009 QX56

LAN
TROUBLE DIAGNOSISLAN-51
< FUNCTION DIAGNOSIS > [CAN]
C
D
E
F
G H
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K L
B A
O P
N
Never replace the unit even when “NG” is indicated on the “INITIAL DIAG” at this stage. Fo
llow the trouble diagnosis proce-
dures.
IPDM E/R
0: Error at present, 1 – 39: Error in the past (Number means the number of times the ignition switch is turned OFF→ ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
DTC IndexINFOID:0000000003776456
ITEMCAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
IPDM-E TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM Signal receiving status from the ECM
BCM/SEC Signal receiving status from the BCM
DTC Self-diagnosis item
(CONSULT-III indication) DTC detection condition
Inspection
U1000 CAN COMM CIRCUIT When ECM is not transmitting or receiving CAN com-
munication signal of OBD (emission-related diagnosis)
for 2 seconds or more.
Refer to LAN-36
.
When a control unit (except for ECM) is not transmitting
or receiving CAN communication signal for 2 seconds
or more.
U1001 CAN COMM CIRCUIT When ECM is not transmitting or receiving CAN com-
munication signal other than OBD (emission-related di-
agnosis) for 2 seconds or more.
U1002 SYSTEM COMM When a control unit is not transmitting or receiving CAN
communication signal for 2 seconds or less. Start the inspection. Refer
to the applicable section
of the indicated control
unit.
U1010 CONTROL UNIT(CAN) When an error is detected during the initial diagnosis for
CAN controller of each control unit. Replace the control unit
indicating “U1010”.
Revision: December 20092009 QX56