2010 INFINITI QX56 steering

LAN
CAN COMMUNICATION SYSTEMLAN-45
< FUNCTION DIAGNOSIS > [CAN]
C
D
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F
G H
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K L
B A
O P
N
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: April 20092010 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: April 20092010 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 CAMERA 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: April 20092010 QX56

LAN-52
< COMPONENT DIAGNOSIS >[CAN]
CAN COMMUNICATION SYSTEM
COMPONENT DIAGNOSIS
CAN COMMUNICATION SYSTEM
Component Parts LocationINFOID:0000000005146466
1. ECM E16
2. IPDM E/R E122 3. ICC sensor E42
4. AV control unit M45 5. Combination meter M246. ABS actuator and electric unit (con-
trol unit) E125
7. Intelligent Key unit M70 8. BCM M189. Data link connector M22
10. Steering angle sensor M17 11. Driver seat control unit B202 12. ICC unit B13
13. Air bag diagnosis sensor unit M35 14. A/T assembly F9 15. A/C auto amp. M50
16. Transfer control unit E142
AWMIA0011ZZ
Revision: April 20092010 QX56

LAN-60
< COMPONENT DIAGNOSIS >[CAN]
MALFUNCTION AREA CHART
MALFUNCTION AREA CHART
Main LineINFOID:0000000005146468
Branch LineINFOID:0000000005146469
Short CircuitINFOID:0000000005146470
Malfunction area
Reference
Main line between TCM and driver seat control unit LAN-61, "
Diagnosis Procedure"
Main line between TCM and ICC sensorLAN-63, "Diagnosis Procedure"
Main line between ICC sensor and ICC unitLAN-64, "Diagnosis Procedure"
Main line between ICC unit and driver seat control unitLAN-65, "Diagnosis Procedure"
Main line between driver seat control unit and AV control unitLAN-66, "Diagnosis Procedure"
Main line between AV control unit and data link connectorLAN-67, "Diagnosis Procedure"
Main line between data link connector and combination meterLAN-68, "Diagnosis Procedure"
Main line between combination meter and ABS actuator and
electric unit (control unit)LAN-69, "Diagnosis Procedure"
Main line between combination meter and transfer control unit
LAN-70, "Diagnosis Procedure"
Main line between transfer control unit and ABS actuator and
electric unit (control unit)LAN-71, "Diagnosis Procedure"
Malfunction area
Reference
ECM branch line circuit LAN-72, "
Diagnosis Procedure"
TCM branch line circuitLAN-73, "Diagnosis Procedure"
ICC sensor branch line circuitLAN-74, "Diagnosis Procedure"
ICC unit branch line circuitLAN-75, "Diagnosis Procedure"
Driver seat control unit branch line circuitLAN-76, "Diagnosis Procedure"
AV control unit branch line circuitLAN-77, "Diagnosis Procedure"
BCM branch line circuitLAN-78, "Diagnosis Procedure"
Data link connector branch line circuitLAN-79, "Diagnosis Procedure"
A/C auto amp. branch line circuitLAN-80, "Diagnosis Procedure"
Intelligent Key unit branch line circuitLAN-81, "Diagnosis Procedure"
Combination meter branch line circuitLAN-82, "Diagnosis Procedure"
Steering angle sensor branch line circuitLAN-83, "Diagnosis Procedure"
Transfer control unit branch line circuitLAN-84, "Diagnosis Procedure"
ABS actuator and electric unit (control unit) branch line circuit LAN-85, "Diagnosis Procedure"
IPDM E/R branch line circuit LAN-86, "Diagnosis Procedure"
Malfunction area Reference
CAN communication circuit LAN-87, "
Diagnosis Procedure"
Revision: April 20092010 QX56

LAN
STRG BRANCH LINE CIRCUITLAN-83
< COMPONENT DIAGNOSIS > [CAN]
C
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F
G H
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K L
B A
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STRG BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000005146490
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-92, "
Wiring Dia-
gram - BRAKE CONTROL SYSTEM -".
Is the inspection result normal?
YES (Present error)>>Replace the steering angle sensor. Refer to BRC-118, "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.
M17 4 5 Approx. 54 – 66
Revision: April 20092010 QX56

LU-1
ENGINE
C
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K L
M
SECTION LU
A
LU
N
O P
CONTENTS
ENGINE LUBRICATION SYSTEM
PRECAUTION ....... ........................................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
2
Precaution for Liquid Gasket .....................................3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Special Service Tool ........................................... ......4
Commercial Service Tool ..........................................4
FUNCTION DIAGNOSIS ...............................6
LUBRICATION SYSTEM ............................... .....6
Lubrication Circuit ............................................... ......6
Schematic .................................................................7
ON-VEHICLE MAINTENANCE .....................8
ENGINE OIL ................................................... .....8
Inspection ............................................................ ......8
Changing Engine Oil ............................................ .....9
OIL FILTER .......................................................11
Removal and Installation .........................................11
ON-VEHICLE REPAIR .................................12
OIL COOLER ....................................................12
Exploded View ..................................................... ....12
Removal and Installation .........................................12
OIL PUMP .........................................................14
Exploded View .........................................................14
Removal and Installation .........................................14
DISASSEMBLY AND ASSEMBLY ..............16
OIL PUMP .........................................................16
Disassembly and Assembly ................................. ....16
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ...
18
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
18
Standard and Limit .............................................. ....18
Revision: April 20092010 QX56

LU-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005260134
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precaution Necessary for Steering W heel Rotation After Battery Disconnect
INFOID:0000000005260135
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
Revision: April 20092010 QX56