2011 INFINITI QX56 steering

LAN-26
< SYSTEM DESCRIPTION >[CAN]
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000006220530
1. Air bag diagnosis sensor unit 2. Lane camera unit 3. A/T assembly
4. AFS control unit 5. Transfer control unit 6. Low tire pressure warning control
unit
7. IPDM E/R 8. CAN gateway 9. ECM
10. A/C auto amp. 11. ICC sensor 12. AV control unit
13. BCM 14. ABS actuator an d electric unit (con-
trol unit) 15. Combination meter
16. Data link connector 17. Steering angle sensor 18. Accelerator pedal actuator
19. Driver seat control un it 20. Pre-crash seat be lt control unit (driv-
er side) 21. Air levelizer control module
22. ADAS control unit 23. Automatic back door control module 24. Side radar LH
25. Side radar RH
JSMIA0343ZZ
Revision: 2010 May2011 QX56

LAN
SYSTEMLAN-27
< SYSTEM DESCRIPTION > [CAN]
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SYSTEM
CAN COMMUNICATION SYSTEM
CAN COMMUNICATION SYSTEM : CAN
System Specification ChartINFOID:0000000006220532
Determine CAN system type from the following specification chart.
NOTE:
Refer to LAN-18, "
Trouble Diagnosis Procedure" for how to use CAN system specification chart.
×: Applicable
VEHICLE EQUIPMENT IDENTIFICATION INFORMATION
NOTE:
Body type Wagon
Axle 2WD 4WD
Engine VK56VD
Transmission A/T
Brake control VDC
ICC system ××
CAN system type 1 2 3 4 CAN communication unit
ECM ××××
Transfer control unit ××
ABS actuator and electric unit (control unit) ××××
TCM ××××
Air bag diagnosis sensor unit ××××
AFS control unit ××
AV control unit ××××
BCM ××××
CAN gateway ××
Data link connector ××××
A/C auto amp. ××××
Combination meter ××××
Steering angle sensor ××××
Low tire pressure warning control unit ××××
IPDM E/R ××××
Driver seat control unit ××××
Pre-crash seat belt control unit (driver side) ××
Air levelizer control module ××××
ADAS control unit ××
Automatic back door control module ××××
ITS communication unit
ADAS control unit ××
Side radar RH ××
Side radar LH ××
Lane camera unit ××
Accelerator pedal actuator ××
ICC sensor ××
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-31
< SYSTEM DESCRIPTION > [CAN]
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Meter display signal
TR
RT
Oil pressure switch signal TR
RT
Position light request signal T R R
Rear fog light status signal T R
Rear window defogger con-
trol signal TR
RT
Sleep wake up signal T R R R R R R
Starter control relay signal T R
Starter relay status signal TRR
RT
Starting mode signal T R
Steering lock relay signal TRR
RT
Theft warning horn request
signal TR
Turn indicator signal R T R R
A/C display signal R T
A/C ON signal R T
Ambient temperature signal T R
Blower fan ON signal R T
Distance to empty signal R T
Fuel level low warning sig-
nal RT
Fuel level sensor signal R T
Manual mode shift down
signal RT
Manual mode shift up sig-
nal RT
Manual mode signal R T
Non-manual mode signal R T
Odometer signal R T
Parking brake switch signal R R T R R
Sleep-ready signal RT
RT
RT
Tow mode switch signal R T
Wake up signal RT
RT
Steering angle sensor mal-
function signal RR T R R
Steering angle sensor sig-
nal RR RR T R R
Steering angle speed signal R T R 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-32
< SYSTEM DESCRIPTION >[CAN]
SYSTEM
Steering calibration signal R T R
Hazard request signalRT
RT
Horn request signal R T
Low tire pressure warning
lamp signal RT
Tire pressure data signal R T
A/C compresso r feedback
signal RRT
Detention switch signal R T R
Engine restart control sig-
nal RT
Front wiper stop position
signal RT
High beam status signal R T
Hood switch signal R T
Low beam status signal R R T
Push-button ignition switch
status signal RT
Starter control relay signal R T
Steering lock unit status
signal RT
CK SUSP indi cator lamp
signal RT
Brake fluid pressure control
signal R
T
BSW warning lamp signal R T
IBA OFF indicator lamp sig-
nal RT
IBA operation signal RT
ICC operation signal R T
ICC warning lamp signal R T
Lane departure warning
lamp signal RT
LDP ON indicator lamp sig-
nal RT
Target yaw moment signal R T
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

LAN-58
< DTC/CIRCUIT DIAGNOSIS >[CAN]
MALFUNCTION AREA CHART
SHORT CIRCUIT
ITS Communication CircuitINFOID:0000000006220538
MAIN LINE
BRANCH LINE
Malfunction area Reference
ECM branch line circuit LAN-68, "
Diagnosis Procedure"
Transfer control unit branch line circuitLAN-69, "Diagnosis Procedure"
ABS actuator and electric unit (control unit) branch line circuit LAN-70, "Diagnosis Procedure"
TCM branch line circuit LAN-71, "Diagnosis Procedure"
Air bag diagnosis sensor unit branch line circuitLAN-72, "Diagnosis Procedure"
AFS control unit branch line circuitLAN-73, "Diagnosis Procedure"
AV control unit branch line circuitLAN-74, "Diagnosis Procedure"
BCM branch line circuitLAN-75, "Diagnosis Procedure"
CAN gateway branch line circuit (CAN communication circuit 1)LAN-76, "Diagnosis Procedure"
CAN gateway branch line circuit (CAN communication circuit 2)LAN-77, "Diagnosis Procedure"
Data link connector branch line circuitLAN-78, "Diagnosis Procedure"
A/C auto amp. branch line circuitLAN-79, "Diagnosis Procedure"
Combination meter branch line circuitLAN-80, "Diagnosis Procedure"
Steering angle sensor branch line circuitLAN-81, "Diagnosis Procedure"
Low tire pressure warning control unit branch line circuitLAN-82, "Diagnosis Procedure"
IPDM E/R branch line circuitLAN-83, "Diagnosis Procedure"
Driver seat control unit branch line circuitLAN-84, "Diagnosis Procedure"
Pre-crash seat belt control unit (driver side) branch line circuitLAN-85, "Diagnosis Procedure"
Air levelizer control module branch line circuitLAN-86, "Diagnosis Procedure"
ADAS control unit branch line circuitLAN-87, "Diagnosis Procedure"
Automatic back door control module branch line circuitLAN-88, "Diagnosis Procedure"
Malfunction area Reference
CAN communication circuit (Without ICC system) LAN-94, "
Diagnosis Procedure"
CAN communication circuit 1 (With ICC system)LAN-96, "Diagnosis Procedure"
CAN communication circuit 2 (With ICC system)LAN-98, "Diagnosis Procedure"
Malfunction area Reference
Main line between side radar RH and side radar LH LAN-64, "
Diagnosis Procedure"
Main line between side radar LH and lane camera unitLAN-65, "Diagnosis Procedure"
Main line between lane camera unit and accelerator pedal actu-
atorLAN-67, "Diagnosis Procedure"
Malfunction area Reference
Side radar RH branch line circuit LAN-89, "
Diagnosis Procedure"
Side radar LH branch line circuitLAN-90, "Diagnosis Procedure"
Lane camera unit branch line circuitLAN-91, "Diagnosis Procedure"
Accelerator pedal actuator branch line circuitLAN-92, "Diagnosis Procedure"
ICC sensor branch line circuitLAN-93, "Diagnosis Procedure"
Revision: 2010 May2011 QX56

LAN
STRG BRANCH LINE CIRCUITLAN-81
< DTC/CIRCUIT DIAGNOSIS > [CAN]
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STRG BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006220557
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the terminals and connectors of the steer ing angle sensor for damage, bend and loose connection
(unit side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of steering angle sensor.
2. Check the resistance between the steering angle sensor harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the steering angle sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-53, "
Wiring Dia-
gram".
Is the inspection result normal?
YES (Present error)>>Replace the steering angle sensor. Refer to BRC-139, "Removal and Installation".
YES (Past error)>>Error was detected in the steering angle sensor branch line.
NO >> Repair the power supply and the ground circuit.
Steering angle sensor harness connector Resistance (Ω)
Connector No. Terminal No.
M30 5 2 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN-130
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 1)]
STRG BRANCH LINE CIRCUIT
STRG BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256253
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the steer ing angle sensor for damage, bend and loose connection
(unit side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of steering angle sensor.
2. Check the resistance between the steeri ng angle sensor harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the steering angle sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-53, "
Wiring Dia-
gram".
Is the inspection result normal?
YES (Present error)>>Replace the steering angle sensor. Refer to BRC-139, "Removal and Installation".
YES (Past error)>>Error was detected in the steering angle sensor branch line.
NO >> Repair the power supply and the ground circuit.
Steering angle sensor harness connector Resistance (Ω)
Connector No. Terminal No.
M30 5 2 Approx. 54 – 66
Revision: 2010 May2011 QX56