2011 INFINITI QX56 octane

EC-526
< SYMPTOM DIAGNOSIS >[VK56VD]
ENGINE CONTROL SYSTEM SYMPTOMS
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
SYSTEM — ENGINE MECHANICAL & OTHER
Manifold absolute pressure sensor circuit 3
EC-210
Battery current sensor 4 5 5 3EC-412EC-420
EC-424
Heated oxygen sensor 2 6 6 6 6 5EC-243EC-249
EC-257
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel tank 5
5 FL-4
Fuel piping 555 55 5
FL-4
Vapor lock —
Valve deposit 5 555 55 5 —
Poor fuel (Heavy weight gasoline,
Low octane) —
Revision: 2010 May2011 QX56

FL-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
General PrecautionsINFOID:0000000006289679
WARNING:
When replacing fuel line parts, be sure to observe the following.
• Put a “CAUTION: FLAMMABLE” sign in the workshop.
 Be sure to work in a well ventilate d area and furnish workshop with a CO
2 fire extinguisher.
 Never smoke while servicing fuel system. Keep open flames and sparks away from the work area.
CAUTION:
 Use gasoline required by the regulations for octane number. Refer to GI-31, "
Fuel".
 Before removing fuel line parts, perform out the following procedures:
- Put drained fuel in an explosi on-proof container and put the lid on securely. Keep the container in
safe area.
- Release fuel pressure from the fuel lines. Refer to EC-153, "
Work Procedure".
- Disconnect the battery cable from the negative terminal.
 Always replace O-rings with new ones.
 Never kink or twist tubes when they are being installed.
 Never tighten hose clamps excessi vely to avoid damaging hoses.
 After installing tubes, check there is no fuel leakage at connections in the following steps.
- Apply fuel pressure to fuel lin es with turning ignition switch “O N” (with engine stopped). Then check
for fuel leakage at connections.
- Start engine and rev it up and check for fuel leakage at connections.
 Use only a genuine NISSAN fuel filler cap as a replacemen t. If an incorrect fuel filler cap is used, the
“MIL” may come on.
 For servicing “Evaporative Emission System” parts.
Refer to EC-16, "
Component Parts Location".
Revision: 2010 May2011 QX56

PRECAUTIONSGI-31
< PRECAUTION >
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M B
GI
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Dispose of used oil and used oil filters through authorized waste disposal contractors to licensed waste dis-
posal sites, or to the waste oil reclamation trade. If in doubt, contact the local authority for advice on disposal
facilities.
It is illegal to pour used oil on to the ground, dow n sewers or drains, or into water sources.
The regulations concerning po llution vary between regions.
Air ConditioningINFOID:0000000006280875
Use an approved refrigerant recovery unit any time t he air conditioning system must be discharged. Refer to
HA section “REFRIGERANT” fo r specific instructions.
FuelINFOID:0000000006280876
INFINITI recommends the use of unleaded premium gasoli ne with an octane rating of at least 91 AKI (Anti-
Knock Index) number (Research octane number 96).
If unleaded premium gasoline is not available, unleaded r egular gasoline with an octane rating of at least 87
AKI number (Research octane number 91), can be used. In such case, engine performance may be decrease.
CAUTION:
 Using a fuel other than that specified could ad versely affect the emission control system, and may
also affect warranty coverage.
 Under no circumstances should a leaded gasoline be used, because this will damage the three-way
catalyst.
 Do not use E-85 fuel in the vehicle . The vehicle is not designed to run on E-85 fuel. Using E-85 fuel
can damage the fuel system components and is not covered by the INFINITI vehicle limited warranty.
Revision: 2010 May2011 QX56