2007 INFINITI QX56 sensor

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-45
< SERVICE INFORMATION >[CAN]
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B
LAN
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O
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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

LAN-46
< SERVICE INFORMATION >[CAN]
TROUBLE DIAGNOSIS
NOTE:
CAN data of the air bag diagnosis sensor unit is not used by usual service work, thus it is omitted.
TYPE 3/TYPE 4
NOTE:
Refer to LAN-37, "
Abbreviation List" for the abbreviations of the connecting units.
T: Transmit R: Receive
A/C switch/indicator signalTR
RT
1st position switch signal R T
4th position switch signal R T
Distance to empty signal R T
Fuel level low warning signal R T
Fuel level sensor signal R T
Parking brake switch signal R T
Stop lamp switch signal R T
Tow mode switch signal R T
Vehicle speed signalRR T
RRR RRR T
Steering angle sensor signalTR
ABS malfunction signal R T
ABS warning lamp signalRT
Brake pressure sensor signal R T
Brake warning lamp signalRT
SLIP indicator lamp signalRT
TCS malfunction signal R T
VDC malfunction signal R T
VDC OFF indicator lamp signal R R T
VDC operation signal R T
Front wiper stop position signal R T
High beam status signal RT
Hood switch signal R T
Low beam status signal RT
Rear window defogger control signal R R TSignal name/Connecting unit
ECM
TCM
LASER
ICC
ADP
BCM
DISP
HVAC
M&A
STRG
ABS
IPDM-E
Signal name/Connecting unitECM
TCM
LASER
ICC
ADP
BCM
DISP
HVAC
M&A
STRG
4WD
ABS
IPDM-E
A/C compressor request signal TR
Accelerator pedal position signal T R R R 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 R R

TROUBLE DIAGNOSIS
LAN-47
< SERVICE INFORMATION >[CAN]
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LAN
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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-48
< SERVICE INFORMATION >[CAN]
TROUBLE DIAGNOSIS
NOTE:
CAN data of the air bag diagnosis sensor unit is not used by usual service work, thus it is omitted.
Tire pressure signal T R R
Turn indicator signal T R
A/C switch/indicator signalTR
RT
1st position switch signal R T
4th position switch signal R T
Distance to empty signal R T
Fuel level low warning signal R T
Fuel level sensor signal R T
Parking brake switch signal R T
Stop lamp switch signal R T
Tow mode switch signal R T
Vehicle speed signalRR R T
RRR RRR T
Steering angle sensor signalTR
ABS malfunction signal R T
ABS warning lamp signalRT
Brake pressure sensor signal R T
Brake warning lamp signalRT
SLIP indicator lamp signalRT
TCS malfunction signal R T
VDC malfunction signal R T
VDC OFF indicator lamp signal R R T
VDC operation signal R T
Front wiper stop position signal R T
High beam status signal RT
Hood switch signal R T
Low beam status signal RT
Rear window defogger control signal R R TSignal name/Connecting unit
ECM
TCM
LASER
ICC
ADP
BCM
DISP
HVAC
M&A
STRG
4WD
ABS
IPDM-E

TROUBLE DIAGNOSIS
LAN-61
< SERVICE INFORMATION >[CAN]
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Component Parts LocationINFOID:0000000003533637
Harness LayoutINFOID:0000000003533638
Refer to PG-39, "Harness Layout".
Malfunction Area ChartINFOID:0000000003533639
MAIN LINE
BRANCH LINE
1. ECM E16 2. IPDM E/R E122 3. ICC sensor E42
4. Display control unit M95 5. Combination meter M24 6. ABS actuator and electric unit (con-
trol unit) E125
7. BCM M18 8. Data link connector M22 9. Steering angle sensor M47
10. Driver seat control unit P2 11. ICC unit B13 12. Air bag diagnosis sensor unit M35
13. A/T assembly F9 14. Front air control M50 15. Transfer control unit E142
BKIA0189E
Malfunction Area Reference
Main line between TCM and driver seat control unitLAN-62, "
Main Line Between TCM and Driver Seat Control Unit"
Main line between TCM and ICC sensorLAN-63, "Main Line Between TCM and ICC Sensor"
Main line between ICC sensor and ICC unitLAN-64, "Main Line Between ICC Sensor and ICC Unit"
Main line between ICC unit and driver seat control unitLAN-65, "Main Line Between ICC Unit and Driver Seat Control
Unit"
Main line between driver seat control unit and data link connectorLAN-65, "Main Line Between Driver Seat Control Unit and Data
Link Connector"
Main line between data link connector and ABS actuator and
electric unit (control unit)LAN-66, "Main Line Between Data Link Connector and ABS Ac-
tuator and Electric Unit (Control Unit)"
Malfunction Area Reference
ECM branch line circuit LAN-67, "
ECM Branch Line Circuit"
TCM branch line circuit LAN-67, "TCM Branch Line Circuit"
ICC sensor branch line circuit LAN-68, "ICC Sensor Branch Line Circuit"
ICC unit branch line circuit LAN-69, "ICC Unit Branch Line Circuit"
Driver seat control unit branch line circuitLAN-69, "Driver Seat Control Unit Branch Line Circuit"

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]
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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