2007 INFINITI QX56 ignition

TROUBLE DIAGNOSIS
LAN-41
< SERVICE INFORMATION >[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
N
O
P Driver Seat Control 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.
BCM
NOTE:
Replace the unit when “NG” is indicated on the “INITIAL DIAG”.
Front Air Control
SELECT SYS-
TEMCAN DIAG SUP-
PORT MNTRDescriptionNormal Error
PRSNT
ICCINITIAL DIAG Status of CAN controller
OKNG
TRANSMIT DIAG Signal transmission status
UNKWN ECM Signal receiving status from the ECM
VDC/TCS/ABSSignal receiving status from the ABS actuator and electric unit
(control 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
SELECT SYS-
TEMCAN DIAG SUP-
PORT MNTRDescriptionNormal Error
PRSNT PAST PRSNT PAST
AUTO DRIVE
POS.TRANSMIT DIAG Not used even though indicated
METER/M&ASignal 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
SELECT SYS-
TEMCAN DIAG SUP-
PORT MNTRDescriptionNormal Error
PRSNT
BCMINITIAL 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

LAN-42
< SERVICE INFORMATION >[CAN]
TROUBLE DIAGNOSIS
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.
Transfer Control 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.
ABS Actuator and Electric Unit (Control Unit)
CAUTION:SELECT SYS-
TEMCAN DIAG SUP-
PORT MNTRDescriptionNormal Error
PRSNT PAST PRSNT PAST
HVACTRANSMIT 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/ABSSignal receiving status from the ABS actu-
ator and electric unit (control unit)
IPDM E/R Not used even though indicated
DISPLAYSignal receiving status from the display
control unitOKOK
or
1 – 39
*UNKWN 0
I-KEY
Not used even though indicated EPS
AWD/4WD
e4WD
ICC
LANE KEEP
TIRE-P
SELECT SYS-
TEMCAN DIAG SUP-
PORT MNTRDescriptionNormal Error
PRSNT PAST PRSNT PAST
ALL MODE AWD/
4WDTRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0 ECM Signal receiving status from the ECM
VDC/TCS/ABSSignal receiving status from the ABS actu-
ator and electric unit (control unit)
TCM Signal receiving status from the TCM
STRGSignal receiving status from the steering
angle sensor
SELECT SYSTEMCAN DIAG SUP-
PORT MNTRDescriptionNormal Error
PRSNT
ABSINITIAL 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

TROUBLE DIAGNOSIS
LAN-43
< SERVICE INFORMATION >[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
N
O
P
Never replace the unit even when “NG” is indicated on the “INITIAL DIAG” at this stage. Follow 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.
MONITOR ITEM LIST (ON-BOARD DIAGNOSIS)
Display Control Unit
NOTE:
CAN diagnostic support monitor of the display control unit is indicated on the vehicle display. Refer to AV-123,
"CAN Communication Line Check".
*: The error counter stops counting when it reaches “50” and holds “50” until it is deleted.SELECT SYS-
TEMCAN DIAG SUP-
PORT MNTRDescriptionNormal Error
PRSNT PAST PRSNT PAST
IPDM E/RTRANSMIT 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
PKIB6080E
Unit name Diagnosis item DescriptionIndicated items on CAN DIAG SUPPORT MONITOR
Normal Error
Result indi-
catedError
counter
(Reference)Result indi-
catedError
counter
(Reference)
Display control
unitCAN_COMM Status of CAN controller
OK0
or
1 – 50*NG
1 – 50* CAN_CIRC_1 Signal transmission status
UNKWN CAN_CIRC_2Signal receiving status from the
BCM
CAN_CIRC_3Signal receiving status from the
ECM
CAN_CIRC_4Signal receiving status from the
front air control
CAN_CIRC_5Signal receiving status from the
combination meter
CAN_CIRC_6 Not used even though indicated
CAN_CIRC_7Signal receiving status from the
IPDM E/ROK0
or
1 – 50*UNKWN 1 – 50*
CAN_CIRC_8
Not used even though indicated
CAN_CIRC_9

TROUBLE DIAGNOSIS
LAN-45
< SERVICE INFORMATION >[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
N
O
P
Engine speed signal T R R R R R R
Engine status signal T R
Fuel consumption monitor signalTR
RT
ICC steering switch signal T R
Malfunction indicator lamp signal T R
Wide open throttle position signal T R
A/T CHECK indicator lamp signal T R
A/T fluid temperature sensor signal T R
A/T position indicator lamp signal T R R
A/T self-diagnosis signal R T
Current gear position signal T R R
Output shaft revolution signal R T R
P range signal T R R R R
Turbine revolution signal R T R
ICC sensor signal T R
Buzzer output signalTR
TR
ICC OD cancel request signal R R T
ICC operation signal R R T
ICC system display signal T R
System setting signalTR
RT
A/C switch signal R T R
Blower fan motor switch signal R T
Day time running light request signal T R R
Door switch signal R T R R R
Front fog light request signal T R
Front wiper request signal R T R
High beam request signal T R R
Horn chirp signal T R
Ignition switch signal R T R
Key fob door unlock signal R T
Key fob ID signal R T
Key switch signal R T
Low beam request signal T R
Position light request signal T R R
Rear window defogger switch signal T R R
Sleep wake up signal R T R R
Theft warning horn request signal T R
Tire pressure data signal T R
Tire pressure signal T R R
Turn indicator signal T RSignal name/Connecting unit
ECM
TCM
LASER
ICC
ADP
BCM
DISP
HVAC
M&A
STRG
ABS
IPDM-E

TROUBLE DIAGNOSIS
LAN-47
< SERVICE INFORMATION >[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
N
O
P
Cooling fan speed request signal TR
Engine coolant temperature signal T R R
Engine speed signal T R R R R R R R
Engine status signal T R
Fuel consumption monitor signalTR
RT
ICC steering switch signal T R
Malfunction indicator lamp signal T R
Wide open throttle position signal T R
A/T CHECK indicator lamp signal T R
A/T fluid temperature sensor signal T R
A/T position indicator lamp signal T R R R
A/T self-diagnosis signal R T
Current gear position signal T R R
Output shaft revolution signal R T R R
P range signal T R R R R
Turbine revolution signal R T R
ICC sensor signal T R
Buzzer output signalTR
TR
ICC OD cancel request signal R R T
ICC operation signal R R T
ICC system display signal T R
System setting signalTR
RT
A/C switch signal R T R
Blower fan motor switch signal R T
Day time running light request signal T R R
Door switch signal R T R R R
Front fog light request signal T R
Front wiper request signal R T R
High beam request signal T R R
Horn chirp signal T R
Ignition switch signal R T R
Key fob door unlock signal R T
Key fob ID signal R T
Key switch signal R T
Low beam request signal T R
Position light request signal T R R
Rear window defogger switch signal T R R
Sleep wake up signal R T R R
Theft warning horn request signal T R
Tire pressure data signal T RSignal name/Connecting unit
ECM
TCM
LASER
ICC
ADP
BCM
DISP
HVAC
M&A
STRG
4WD
ABS
IPDM-E

LAN-62
< SERVICE INFORMATION >[CAN]
TROUBLE DIAGNOSIS
SHORT CIRCUIT
Main Line Between TCM and Driver Seat Control UnitINFOID:0000000003533640
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).
- Harness connector F14
- Harness connector E5
- Harness connector E34
- Harness connector B40
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of A/T assembly and the harness connectors F14 and E5.
2. Check the continuity between the A/T assembly harness connector and the harness connector.
OK or NG
OK >> GO TO 3.
NG >> Repair the main line between the A/T assembly and the harness connector F14.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the harness connectors E34 and B40.
2. Check the continuity between harness connectors.
BCM branch line circuit LAN-70, "BCM Branch Line Circuit"
Display control unit branch line circuit LAN-70, "Display Control Unit Branch Line Circuit"
Data link connector branch line circuit LAN-71, "Data Link Connector Branch Line Circuit"
Front air control branch line circuitLAN-71, "Front Air Control Branch Line Circuit"
Combination meter branch line circuit LAN-72, "Combination Meter Branch Line Circuit"
Steering angle sensor branch line circuit LAN-72, "Steering Angle Sensor Branch Line Circuit"
Transfer control unit branch line circuitLAN-73, "Transfer Control Unit Branch Line Circuit"
ABS actuator and electric unit (control unit) branch line circuit LAN-74, "ABS Actuator and Electric Unit (Control Unit) Branch
Line Circuit"
IPDM E/R branch line circuit LAN-74, "IPDM E/R Branch Line Circuit"
Malfunction Area Reference
Malfunction Area Reference
CAN communication circuitLAN-75, "
CAN Communication Circuit"
A/T assembly harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
F93
F145Yes
815Yes
Harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.

TROUBLE DIAGNOSIS
LAN-63
< SERVICE INFORMATION >[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
N
O
P
OK or NG
OK >> GO TO 4.
NG >> Repair the main line between the harness connectors E5 and E34.
4.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the harness connectors B37 and P1.
2. Check the continuity between harness connectors.
OK or NG
OK >> • Present error: Check the following items again.
- Decision of CAN system type.
- Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
- Not copied from on-board diagnosis.
- Procedure for detecting root cause.
• Past error: Error was detected in the main line between the TCM and the driver seat control unit.
NG >> Repair the main line between the harness connectors B40 and B37.
Main Line Between TCM and ICC SensorINFOID:0000000003533641
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).
- Harness connector F14
- Harness connector E5
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of A/T assembly and the harness connectors F14 and E5.
2. Check the continuity between the A/T assembly harness connector and the harness connector.
OK or NG
OK >> GO TO 3.
NG >> Repair the main line between the A/T assembly and the harness connector F14.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of ICC sensor.
2. Check the continuity between the harness connector and the ICC sensor harness connector.
E55
E3424 Yes
15 23 Yes
Harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
B4024
B3715 Yes
23 14 Yes
A/T assembly harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
F93
F145Yes
815Yes

LAN-64
< SERVICE INFORMATION >[CAN]
TROUBLE DIAGNOSIS
OK or NG
OK >> • Present error: Check the following items again.
- Decision of CAN system type.
- Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
- Not copied from on-board diagnosis.
- Procedure for detecting root cause.
• Past error: Error was detected in the main line between the TCM and the ICC sensor.
NG >> Repair the main line between the harness connector E5 and the ICC sensor.
Main Line Between ICC Sensor and ICC UnitINFOID:0000000003533642
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).
- Harness connector E34
- Harness connector B40
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of ICC sensor and the harness connectors E34 and B40.
2. Check the continuity between the ICC sensor harness connector and the harness connector.
OK or NG
OK >> GO TO 3.
NG >> Repair the main line between the ICC sensor and the harness connector E34.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of ICC unit.
2. Check the continuity between the harness connector and the ICC unit harness connector.
OK or NG
OK >> • Present error: Check the following items again.
- Decision of CAN system type.
- Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
Harness connector ICC sensor harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
E55
E422Yes
15 3 Yes
ICC sensor harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
E422
E3424 Yes
323Yes
Harness connector ICC unit harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
B4024
B1314 Yes
23 5 Yes