2009 INFINITI QX56 check engine

LAN
CAN COMMUNICATION SYSTEMLAN-45
< FUNCTION DIAGNOSIS > [CAN]
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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: December 20092009 QX56

PRECAUTIONSLU-3
< PRECAUTION >
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5. When the repair work is completed, return the ignition switch to the
″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of al l control units using CONSULT-III.
Precaution for Liquid GasketINFOID:0000000003771265
REMOVAL OF LIQUID GASKET SEALING
• After removing the bolts and nuts, separate the mating surface and
remove the old liquid gasket sealing using Tool.
CAUTION:
Do not damage the mating surfaces.
• Tap the seal cutter to insert it (1).
• In areas where the Tool is difficult to use, lightly tap to slide it (2).
LIQUID GASKET APPLICATION PROCEDURE
1. Remove the old liquid gasket adhering to the gasket application surface and the mating surface using suitable tool.
• Remove the liquid gasket completely from the groove of the
liquid gasket application surface, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove adhering moisture, grease and foreign material.
3. Attach the liquid gasket tube to the Tool. Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-15, "
Recommended Chemical Products and Sealants".
4. Apply the liquid gasket without breaks to the specified location with the specified dimensions.
• If there is a groove for the liquid gasket application, apply theliquid gasket to the groove.
• As for the bolt holes, normally apply the liquid gasket inside
the holes. If specified in the procedure, it should also be
applied outside the holes.
• Within five minutes of liquid gasket application, install the mat-
ing component.
• If the liquid gasket protrudes, wipe it off immediately.
• Do not retighten after the installation.
• Wait 30 minutes or more after installation before refilling the engine with engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe them.
Tool number : KV10111100 (J-37228)
WBIA0566E
PBIC0003E
Tool number : WS39930000 ( — )
WBIA0567E
SEM159F
Revision: December 20092009 QX56

LU-8
< ON-VEHICLE MAINTENANCE >
ENGINE OIL
ON-VEHICLE MAINTENANCE
ENGINE OIL
InspectionINFOID:0000000003771270
OIL LEVEL
• Before starting the engine make sure the vehicle is parked on a flatand level surface, then check the oil level. If the engine is already
running, turn it off and allow 10 minutes before checking.
• Check that the oil level is within the low (L) and high (H) range as indicated on the dipstick.
• If the engine oil level is out of range, add oil as necessary. Refer to
MA-12, "
Fluids and Lubricants".
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 the broken
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 yoursel f, as engine oil may be hot.
• Put the A/T shift selector in the Park “P” position.
1. Check the engine oil level. Refer to LU-8, "
Inspection".
2. Remove engine front undercover using power tool.
3. Disconnect the oil pressure switch harness connector.
4. Remove the oil pressure switch (A).
SMA954C
WBIA0791E
Revision: December 20092009 QX56

ENGINE OILLU-9
< ON-VEHICLE MAINTENANCE >
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5. Install Tools.
6. Start the engine and warm it up to normal operating temperature.
7. Check the engine oil pressure with engine running under no-load.
Engine oil pressure [Engine oil temperature at 80
°C (175 °F)]
Unit: kPa (kg/cm2, psi)
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-15, "
Recommended Chemical Prod-
ucts and Sealants".
c. After warming up engine, make sure there is no leakage of engine oil with engine running.
Changing Engine OilINFOID:0000000003771271
WARNING:
• Be careful not to burn yourself, as the engine oil is hot.
• Prolonged and repeated contact with used engine oil may cause skin cancer. Try to avoid direct skin contact with used
engine oil. If skin contact is made, wash thoroughly with soap
or hand cleaner as soon as possible.
1. Remove engine front undercover using power tool.
2. Warm up engine, and check for oil leakage from engine compo- nents. Refer to LU-8, "
Inspection".
3. Stop engine and wait for 10 minutes.
4. Loosen oil filler cap, then remove drain plug.
5. Drain engine oil.
6. Install drain plug with new washer. CAUTION:
• Be sure to clean drain plug and install with new washer.
7. Refill with new engine oil. Refer to MA-12, "
Fluids and Lubricants".
Engine oil capacity (Approximate):
Tool number : ST25051001 (J-25695-1)
: ST25052000 (J-25695-2)
WBIA0571E
Engine Speed Approximate Discharge Oil Pressure
Idle speed More than 98 (1.0, 14)
2,000 rpm More than 294 (3.0, 43)
Oil pressure switch torque : 14.7 N·m (1.5 kg-m, 11 ft-lb)
Oil pan drain plug : 34.3 N·m (3.5 kg-m, 25 ft-lb)
KBIA2498E
Revision: December 20092009 QX56

LU-10
< ON-VEHICLE MAINTENANCE >
ENGINE OIL
Unit: (US qt, Imp qt)
CAUTION:
• The refill capacity depends on the engine oil temperature and drain time. Use these specifica-
tions for reference only.
• Always use the oil level gauge to determine when the proper amount of engine oil is in the engine.
8. Warm up engine and check area around drain plug and oil filter for oil leakage.
9. Stop engine and wait for 10 minutes.
10. Check engine oil level. Refer to LU-8, "
Inspection".
Drain and refill With oil filter change
6.5 (6 7/8, 5-3/4)
Without oil filter change 6.2 (6-1/2, 5-1/2)
Dry engine (engine overhaul) 7.6 (8, 6-3/4)
Revision: December 20092009 QX56

OIL FILTERLU-11
< ON-VEHICLE MAINTENANCE >
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OIL FILTER
Removal and InstallationINFOID:0000000003771272
REMOVAL
1. Drain the engine oil. Refer to
LU-9, "Changing Engine Oil".
2. Remove the oil filter using Tool.
WARNING:
Be careful not to get burned when the engine and engine oil
are hot.
CAUTION:
• The oil filter is provided with a relief valve.
• Use Genuine NISSAN oil filter or equivalent.
• When removing, prepare a s hop cloth to absorb any
engine oil leakage or spillage.
• 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 installation surface.
2. Apply engine oil to the oil seal circumference of the new oil filter.
3. Screw the oil filter manually until it touches the installation sur-
face, then tighten it by 2/3 turn. Or tighten to specification.
4. Refill the engine with new engine oil. Refer to LU-9, "
Changing
Engine Oil".
5. Inspect the engine for oil leakage. Follow the "INSPECTION AFTER INSTALLATION" procedure.
INSPECTION AFTER INSTALLATION
1. Check the engine oil level. Refer to LU-8, "Inspection".
2. Start the engine and check for engine oil leakage.
3. Stop the engine and wait for 10 minutes.
4. Check the engine oil level and add engine oil as required. Tool number : KV10115801 (J-38956)
WBIA0388E
SMA010
Oil filter : 17.7 N·m (1.8 kg-m, 13 ft-lb)
SMA229B
Revision: December 20092009 QX56

LU-12
< ON-VEHICLE REPAIR >
OIL COOLER
ON-VEHICLE REPAIR
OIL COOLER
Exploded ViewINFOID:0000000004115483
Removal and InstallationINFOID:0000000003771273
WARNING:
Be careful not to burn yourself, as the engine oil and engine coolant are hot.
REMOVAL
1. Drain engine coolant from the radiator. Refer to CO-11, "Changing Engine Coolant".
2. Disconnect water hoses from the oil cooler. CAUTION:
Do not spill engine coolant on the drive belt.
3. Remove oil filter. Refer to LU-11, "
Removal and Installation".
CAUTION:
Do not spill engine oil on the drive belt.
4. Remove connector bolt, and remove oil cooler and O-ring.
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.
1. Oil pan 2. Water hose3. Water pipe
4. Water hose 5. Connector bolt 6. Oil filter
7. Oil cooler 8. O-ring 9. Relief valve
10. Water hose 11. Connector pipe 12. Gasket
A. To thermostat housing B. Refer to LU-11
C. To cylinder block
WBIA0790E
Revision: December 20092009 QX56

OIL COOLERLU-13
< ON-VEHICLE REPAIR >
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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.
INSTALLATION
Installation is in the reverse order of removal, paying attention to the following:
• Confirm that no foreign objects are adhering to the sealing sur- faces of the oil cooler or oil pan.
• Tighten the connecting bolt after aligning the stopper on the oil pan side with protrusion of the oil cooler.
INSPECTION AFTER INSTALLATION
1. Check levels and add engine oil and engine coolant. Refer to LU-8, "Inspection" and CO-10, "Inspection".
2. Start the engine, and check for leaks of engine oil and engine coolant.
3. Stop the engine and wait for 10 minutes.
4. Check engine oil level and engine coolant level again.
KBIA2500E
Revision: December 20092009 QX56