check engine INFINITI QX56 2011 Factory Service Manual

LAN-24
< PRECAUTION >[CAN]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006238426
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 severi ty 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 “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
 To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/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 “SRS AIR BAG”.
 Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied 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 Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric 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.
Precautions for Trouble DiagnosisINFOID:0000000006220528
CAUTION:
 Never apply 7.0 V or more to the measurement terminal.
 Use a tester with open terminal voltage of 7.0 V or less.
 Turn the ignition switch OFF and disconnect th e battery cable from the negative terminal when
checking the harness.
Precautions for Harness RepairINFOID:0000000006220529
 Solder the repaired area and wrap tape around the soldered area.
NOTE:
A fray of twisted lines must be within 110 mm (4.33 in).
SKIB8766E
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

ENGINE OILLU-7
< PERIODIC MAINTENANCE >
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PERIODIC MAINTENANCE
ENGINE OIL
InspectionINFOID:0000000006289616
OIL LEVEL
NOTE:
Before starting engine, put vehicle horizontally and check
the engine oil level. If engine is already started, stop
it and allow 10 minutes before checking.
1. Pull out oil level gauge and wipe it clean.
2. Insert oil level gauge and check the engine oil level is within the range (A) shown in the figure.
3. If it is out of range, adjust it.
CAUTION:
Do not overfill the engine with oil.
OIL APPEARANCE
 Check the engine oil for a white milky appearance or excessive contamination.
 If the engine oil is milky, it is highly probable that it is contaminated with engine coolant. Repair or replace
damaged parts.
OIL LEAKAGE
Check for oil leakage around the following areas:
Oil pan
 Oil pan drain plug
 Oil pressure switch
 Oil filter
 Oil cooler
 Intake valve timing control cover
 Intake valve timing control solenoid valve
 Front cover
 Mating surface between cylinder block and cylinder head
 Mating surface between cylinder head and rocker cover
 Crankshaft oil seal (front and rear)
OIL PRESSURE CHECK
WARNING:
• Be careful not to burn yourself, as th e engine and engine oil may be hot.
 Put the A/T shift selector in the Park “P” position.
1. Check the engine oil level.
2. Remove front under cover.
3. Disconnect the oil pressure switch (1) harness connector.
4. Remove the oil pressure switch. CAUTION:
Do not drop or shock oil pressure switch.
JPBIA0070ZZ
:Vehicle front
JPBIA3526ZZ
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LU-8
< PERIODIC MAINTENANCE >
ENGINE OIL
5. Install the oil pressure gauge [SST: ST25051001 (J25695-1)] (A)and hose [SST: ST25052000 (J25695-2)] (B).
6. Start the engine and warm it up to normal operating temperature.
7. Check the engine oil pressure with engine running under no-load. Refer to LU-17, "
EngineOilPressure".
CAUTION:
If the difference is extreme, check the oil passages and oil pump for leaks and blockages.
8. After the inspections, install oil pressure switch as follows:
a. Remove old liquid gasket adhering to oil pressure switch and engine.
b. Apply liquid gasket and tighten oil pressure switch to the specification. Use Genuine RTV Silicone Seal ant or equivalent. Refer to GI-22, "
Recommended Chemical Prod-
ucts and Sealants".
c. After warming up engine, make sure there is no leakage of engine oil with engine running.
DrainingINFOID:0000000006289617
WARNING:
 Be careful not to burn yourself, as th e engine and engine oil may be hot.
 Prolonged and repeated contact with used engine oil may cause skin cancer; try to avoid direct skin
contact with used oil. If skin contact is made, wash thoroughly with soap or hand cleaner as soon as
possible.
1. Warm up the engine, and check for any oil leaks.
2. Stop the engine and wait for at least 10 minutes.
3. Remove drain plug and oil filler cap to drain the old oil.
RefillingINFOID:0000000006289618
1. Install drain plug with new washer. CAUTION:
Be sure to clean drain plug and install with new washer.
2. Refill with new engine oil. Engine oil specification and viscosity:
Refer to MA-10, "
Fluids and Lubricants".
CAUTION:
 The refill capacity depends on the engine oi l temperature and drain time. Use these specifica-
tions for reference only.
 Always use oil level gauge to determine the proper amount of engine oil in engine.
3. Warm up the engine and check area around drain plug and oil filter for engine oil leakage.
4. Stop the engine and wait for 10 minutes.
5. Check the engine oil level. Refer to LU-7, "
Inspection".
JPBIA0074ZZ
Oil pressure switch torque : Refer to EM-57, "Exploded View".
Tightening torque : Refer to EM-54, "
Exploded View".
Engine oil capacity : Refer to LU-17, "
Periodical Maintenance Specification".
Revision: 2010 May2011 QX56

OIL FILTERLU-9
< PERIODIC MAINTENANCE >
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OIL FILTER
Removal and InstallationINFOID:0000000006289619
REMOVAL
1. Remove front under cover.
2. Drain engine oil. Refer to
LU-8, "
Draining".
3. Remove oil filter using oil filter wrench [SST: KV10115801 (J- 38956)].
WARNING:
Be careful not to burn yourself, as the engine and engine oil
may be hot.
CAUTION:
 The oil filter is equipped with a pressure relief valve.
 Use Genuine NISSAN oil filter or equivalent.
 When removing, prepare a s hop cloth to absorb any
engine oil leaks or spills.
 Do not allow engine oil to adhere to the drive belts.
 Completely wipe off any engine oil that adheres to the engine and the vehicle.
INSTALLATION
1. Remove foreign materials adhering to the oil filter seal mating surface.
2. Apply clean engine oil to the oil filter seal circumference of the
new oil filter as shown.
3. Screw on the oil filter manually until it touches the installation surface, then tighten it by 2/3 turn as shown. Or tighten to speci-
fication.
4. Refill engine with new engine oil. Refer to LU-8, "
Refilling".
5. Inspect engine for oil leaks. Refer to LU-7, "
Inspection".
6. Install front under cover.
InspectionINFOID:0000000006289620
INSPECTION AFTER INSTALLATION
1. Check engine oil level. Refer to LU-7, "Inspection".
2. Start engine and check for engine oil leaks.
3. Stop engine and wait for 10 minutes.
WBIA0388E
SMA010
Oil filter : 17.7 N·m (1.8 kg-m, 13 ft-lb)
SMA229B
Revision: 2010 May2011 QX56

LU-10
< PERIODIC MAINTENANCE >
OIL FILTER
4. Check engine oil level and add engine oil as required.
Revision: 2010 May2011 QX56

LU-12
< REMOVAL AND INSTALLATION >
OIL COOLER
CAUTION:
Perform this step when engine is cold.
4. Remove oil filter. Refer to LU-9, "
Removal and Installation".
5. Remove connector bolt, and remove oil cooler.
INSTALLATION
Installation is in the reverse order of removal, paying attention to the following:
 Confirm that no foreign objects are adhering to the sealing surfaces of the oil cooler and oil pan.
InspectionINFOID:0000000006289623
INSPECTION AFTER REMOVAL
Oil Cooler
Check oil cooler for cracks. Check oil cooler for clogging by blowing compressed air through engine coolant
inlet. If necessary, replace oil cooler assembly.
Relief Valve
Inspect relief valve for movement, cracks and breaks by pushing the ball. If replacement is necessary, remove
the valve by prying it out using a suitable tool. Install a new valve in place by tapping it in.
INSPECTION AFTER INSTALLATION
1. Check engine oil and engine coolant levels and add engine oil and engine coolant. Refer to LU-7, "Inspec-
tion" and CO-8, "Inspection".
2. Start the engine, and check for l eaks of engine oil or engine coolant.
3. Stop the engine and wait for 10 minutes.
4. Check the engine oil level and engine coolant level again. Refer to LU-7, "
Inspection" and CO-8, "Inspec-
tion"
Revision: 2010 May2011 QX56

LU-16
< REMOVAL AND INSTALLATION >
OIL PUMP
 (Clearance) = D1 (Valve hole diameter) - D2 (Outer Diameter of
valve)
CAUTION:
 Coat regulator valve with engine oil.
 Check that it falls smoothly into the regulator valve hole by its
own weight.
INSPECTION AFTER INSTALLATION
1. Check the engine oil level. Refer to LU-7, "Inspection"
2. Start the engine and check for engine oil leaks.
3. Stop the engine and wait 10 minutes.
4. Check the engine oil level and adjust the engine oil level as required. Refer to LU-7, "
Inspection".
Regulator valve
to oil pump cover
: Refer to
LU-17, "
RegulatorVa l v e".
PBIC0143E
Revision: 2010 May2011 QX56

MA-1
MAINTENANCE
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CONTENTS
MAINTENANCE
PREPARATION .............
...............................3
PREPARATION .............................................. .....3
Special Service Tool ........................................... ......3
Commercial Service Tool ..........................................3
PERIODIC MAINTENANCE ..........................4
GENERAL MAINTENANCE ........................... .....4
Explanation of General Maintenance .................. ......4
PERIODIC MAINTENANCE ................................6
Introduction of Periodic Maintenance .................. ......6
Schedule 1 ................................................................6
Schedule 2 ................................................................8
RECOMMENDED FLUIDS AND LUBRI-
CANTS ................................................................
10
Fluids and Lubricants .......................................... ....10
Engine Oil Recommendation ..................................10
Anti-Freeze Coolant Mixture Ratio ..........................11
ENGINE MAINTENANCE ...................................12
DRIVE BELTS ....................................................... ....12
DRIVE BELTS : Exploded View ..............................12
DRIVE BELTS : Checking .......................................12
DRIVE BELTS : Tension Adjustment .....................12
ENGINE COOLANT ............................................... ....12
ENGINE COOLANT : Inspection .............................12
ENGINE COOLANT : Draining ................................13
ENGINE COOLANT : Refilling ................................13
ENGINE COOLANT : Flushing ...............................15
RESERVOIR TANK CAP ..........................................15
RESERVOIR TANK CAP : Inspection ................. ....15
RADIATOR ............................................................ ....16
RADIATOR : Inspection ..........................................16
FUEL LINES .......................................................... ....16
FUEL LINES : Inspection ........................................17
AIR CLEANER FILTER ......................................... ....17
AIR CLEANER FILTER : Removal and Installation
....
17
ENGINE OIL ........................................................... ....17
ENGINE OIL : Draining ............................................17
ENGINE OIL : Refilling ............................................17
OIL FILTER ............................................................ ....18
OIL FILTER : Removal and Installation ...................18
SPARK PLUG ........................................................ ....18
SPARK PLUG : Removal and Installation ...............19
SPARK PLUG : Inspection ......................................19
EVAP VAPOR LINES ............................................ ....20
EVAP VAPOR LINES : Inspection ...........................20
CHASSIS MAINTENANCE ...............................21
EXHAUST SYSTEM . ..................................................21
EXHAUST SYSTEM : Inspec tion ............................21
A/T FLUID .............................................................. ....21
A/T FLUID : Inspection ............................................21
TRANSFER FLUID ................................................ ....21
TRANSFER FLUID : Inspection ..............................21
TRANSFER FLUID : Draining .................................21
TRANSFER FLUID : Refilling ..................................22
FRONT PROPELLER SHAFT: 2F P15 ................. ....22
FRONT PROPELLER SHAFT: 2F P15 : Inspec-
tion ...........................................................................
22
REAR PROPELLER SHAFT: 2F P26 .................... ....23
REAR PROPELLER SHAFT: 2F P26 : Inspection ....23
REAR PROPELLER SHAFT: 2S1410 ................... ....23
REAR PROPELLER SHAFT: 2S1410 : Inspection ....23
FRONT DIFFERENTIAL GEAR OIL: R180A ........ ....24
FRONT DIFFERENTIAL GEAR OIL: R180A : In-
spection ...................................................................
24
Revision: 2010 May2011 QX56

MA-4
< PERIODIC MAINTENANCE >
GENERAL MAINTENANCE
PERIODIC MAINTENANCE
GENERAL MAINTENANCE
Explanation of General MaintenanceINFOID:0000000006287728
General maintenance includes those items which shoul d be checked during the normal day-to-day operation
of the vehicle. They are essential if the vehicle is to continue operating properly. The owners can perform
checks and inspections themselves or have their INFINITI dealers do them.
OUTSIDE THE VEHICLE
The maintenance items listed here should be performed fr om time to time, unless otherwise specified.
INSIDE THE VEHICLE
The maintenance items listed here should be checked on a regular basis, such as when performing periodic maintenance, cleaning the vehicle,
etc.
Item Reference page
Tires Check the pressure with a gauge often and always prior to long distance trips.
Adjust the pressure in all tires, including the spare, to the pressure specified.
Check carefully for damage, cuts or excessive wear. WT-69
Wheel nuts
When checking the tires, make sure no nuts are missing, and check for any
loose nuts. Tighten if necessary. —
Tire rotation Tires should be rotated every 12,000km (7,500 miles). If the vehicle is equipped
with different sized tires in the front and rear, tires cannot be rotated. WT-63
Tire Pressure Moni-
toring System (TPMS)
transmitter compo-
nentsReplace the TPMS transmitter grommet seal, valve core and cap when the tires
are replaced due to wear or age.
WT-66
Wheel alignment and
balanceIf the vehicle should pull to either side while driving on a straight and level road,
or if you detect uneven or abnormal tire wear, there may be a need for wheel
alignment. If the steering wheel or seat vibrates at normal highway speeds,
wheel balancing may be needed. FSU-7
RSU-6
Windshield
Clean the windshield on a regular basis. Check the windshield at least every six
months for cracks or other damage. Repair as necessary. —
Windshield wiper
blades Check for cracks or wear if they do not wipe properly. —
Doors and engine
hood Check that all doors and the engine hood operate smoothly as well as the back
door. Also make sure that all latches lock securely. Lubricate if necessary. Make
sure that the secondary latch keeps the hood from opening when the primary
latch is released.
When driving in areas using road salt or other corrosive materials, check lubri-
cation frequently. MA-34
Lamps
Make sure that the headlamps, stop lamps, tail lamps, turn signal lamps, and
other lamps are all operating properly and installed securely. Also check head-
lamp aim. Clean the headlamps on a regular basis. —
Item
Reference page
Warning lamps and
chimes Make sure that all warning lamps and chimes are operating properly. —
Windshield wiper and
washer Check that the wipers and washer operate properly and that the wipers do not
streak.
—
Windshield defroster Check that the air comes out of the defroster outlets properly and in sufficient
quantity when operating the heater or air conditioner. —
Steering wheel Check that it has the specified play. Check for changes in the steering condi-
tion, such as excessive play, hard steering or strange noises.
Free play: Less than 35 mm (1.38 in) —
Revision: 2010 May2011 QX56