ECU INFINITI QX 2011 Manual PDF

When performing any inspection or mainte-
nance work on your vehicle, always take care to
prevent serious accidental injury to yourself or
damage to the vehicle. The following are gen-
eral precautions which should be closely ob-
served.
WARNING
●Park the vehicle on a level surface, apply the
parking brake securely and block the wheels
to prevent the vehicle from moving. Move
the selector lever to P (Park).
● Be sure the ignition switch is in the OFF or
LOCK position when performing any parts
replacement or repairs.
● Never connect or disconnect the battery or
any transistorized component while the ig-
nition switch is in the ON position.
● Never leave the engine or automatic trans-
mission related component harnesses dis-
connected while the ignition switch is in the
ON position.
● If you must work with the engine running,
keep your hands, clothing, hair and tools
away from moving fans, belts and any other
moving parts. ●
It is advisable to secure or remove any loose
clothing and remove any jewelry, such as
rings, watches, etc. before working on your
vehicle.
● Always wear eye protection whenever you
work on your vehicle.
● If you must run the engine in an enclosed
space such as a garage, be sure there is
proper ventilation for exhaust gases to
escape.
● Never get under the vehicle while it is sup-
ported only by a jack. If it is necessary to
work under the vehicle, support it with
safety stands.
● Keep smoking materials, flame and sparks
away from fuel tank and the battery.
● Your vehicle is equipped with an automatic
engine cooling fan. It may come on at any
time without warning, even if the ignition
key is in the OFF position and the engine is
not running. To avoid injury, always discon-
nect the negative battery cable before work-
ing near the fan.
● On gasoline engine models, the fuel filter or
fuel lines should be serviced by an INFINITI
retailer because the fuel lines are under high
pressure even when the engine is off.
CAUTION
● Do not work under the hood while the engine
is hot. Turn the engine off and wait until it
cools down.
● Avoid direct contact with used engine oil and
coolant. Improperly disposed engine oil,
coolant, and/or other vehicle fluids can dam-
age the environment. Always conform to lo-
cal regulations for disposal of vehicle fluid.
This “8. Maintenance and do-it-yourself” sec-
tion gives instructions regarding only those
items which are relatively easy for an owner to
perform.
A genuine INFINITI Service Manual is also avail-
able. (See “OWNER’S MANUAL/SERVICE
MANUAL ORDER INFORMATION” in the “9. Tech-
nical and consumer information” section.)
You should be aware that incomplete or im-
proper servicing may result in operating diffi-
culties or excessive emissions, and could affect
your warranty coverage. If in doubt about any
servicing, we recommend that it be done by an
INFINITI retailer.
MAINTENANCE PRECAUTIONS
Maintenance and do-it-yourself8-5

CHECKING ENGINE COOLANT LEVEL
Check the coolant levelin the reservoir when the
engine is cold. If the coolant level is below MIN
2, open the reservoir tank cap and add coolant
up to the MAX
1level. If the reservoir tank is
empty, check the coolant level in the radiator
when the engine is cold. If there is insufficient
coolant in the radiator, fill the radiator with
coolant up to the filler opening and also add it
to the reservoir tank up to the MAX level
1.
Tighten the cap securely after adding engine
coolant. This vehicle contains Genuine NISSAN Long Life
Antifreeze/Coolant (blue). The life expectancy of
the factory-fill coolant is 105,000 miles
(168,000 km) or 7 years. Mixing any other type
of coolant or the use of non-distilled water will
reduce the life expectancy of the factory-fill
coolant. Refer to the INFINITI Service and Main-
tenance Guide for more details.
If the cooling system requires coolant fre-
quently, have it checked by an INFINITI retailer.
CHANGING ENGINE COOLANT
Major cooling system repairs should be per-
formed by an INFINITI retailer. The service pro-
cedures can be found in the appropriate INFINITI
Service Manual.
Improper servicing can result in reduced heater
performance and engine overheating.
WARNING
●
To avoid the danger of being scalded, never
change the coolant when the engine is hot.
● Never remove the radiator cap or coolant res-
ervoir cap when the engine is hot. Serious
burns could be caused by high pressure fluid
escaping from the radiator. ●
Avoid direct skin contact with used coolant.
If skin contact is made, wash thoroughly
with soap or hand cleaner as soon as
possible.
● Keep coolant out of reach of children and
pets.
Engine coolant must be disposed of properly.
Check your local regulations.
SDI2511
8-8Maintenance and do-it-yourself

Engine oil and filter
1. Place a large drain pan under the drainplug.
2. Remove the oil filler cap.
3. Remove the drain plug
1with a wrench
and completely drain the oil.
CAUTION
Be careful not to burn yourself, as the engine oil
is hot.
●Waste oil must be disposed of properly.
● Check your local regulations.
4. (Perform steps 4 to 7 only when the
engine oil filter change is needed.)
Loosen the oil filter2with an oil filter
wrench. Remove the oil filter by turning it by
hand.
5. Wipe the engine oil filter mounting sur- face with a clean rag.
CAUTION
Be sure to remove any old rubber gasket re-
maining on the mounting surface of the engine.
Failure to do so could lead to engine damage.
6. Coat the gasket on the new filter with clean engine oil.
7. Screw in the oil filter clockwise until a slight resistance is felt, then tighten ad-
ditionally more than 2/3 turn.
Oil filter tightening torque:11 to 15 ft-lb
(15 to 21 N·m)
8. Clean and re-install the drain plug with a
new washer. Securely tighten the drain
plug with a wrench.
Drain plug tightening torque:22 to 29 ft-lb
(29 to 39 N·m)
Do not use excessive force.
9. Refill engine with recommended oil and install the oil filler cap securely.
CAUTION
The dipstick must be inserted in place to pre-
vent oil spillage from the dipstick hole while
filling the engine with oil.
See “CAPACITIES AND RECOMMENDED FUEL/ LU-
BRICANTS” in the “9. Technical and consumer
information” section for drain and refill capacity.
The drain and refill capacity depends on the oil
temperature and drain time. Use these specifica-
tions for reference only. Always use the dipstick
to determine the proper amount of oil in the
engine.
10. Start the engine and check for leakage around the drain plug and the oil filter.
Correct as required.
SDI2528
8-10Maintenance and do-it-yourself

●Keep the battery surface clean and dry.
Clean the battery with a solution of baking
soda and water.
● Make certain the terminal connections are
clean and securely tightened.
● If the vehicle is not to be used for 30 days or
longer, disconnect the negative () battery
terminal cable to prevent discharging it.
WARNING
● Do not expose the battery to flames or elec-
trical sparks. Hydrogen gas generated by
the battery is explosive. Do not allow battery
fluid to contact your skin, eyes, fabrics, or
painted surfaces. After touching a battery or
battery cap, do not touch or rub your eyes.
Thoroughly wash your hands. If the acid con-
tacts your eyes, skin or clothing, immedi-
ately flush with water for at least 15 minutes
and seek medical attention.
● Do not operate the vehicle if the fluid in the
battery is low. Low battery fluid can cause a
higher load on the battery which can gener-
ate heat, reduce battery life, and in some
cases lead to an explosion.
● When working on or near a battery, always
wear suitable eye protection and remove all
jewelry. ●
Battery posts, terminals and related acces-
sories contain lead and lead compounds.
Wash hands after handling.
● Keep the battery out of the reach of children.
Check the fluid level in each cell (Remove the
battery cover if it is necessary). It should be
between the UPPER LEVEL
1and LOWER LEVEL
2lines.
If it is necessary to add fluid, add only distilled
water to bring the level to the indicator in each
filler opening. Do not overfill.
DI0137MA
BATTERY
Maintenance and do-it-yourself8-15

1. Power steering fluid pump
2. Water pump
3. Alternator
4. Crankshaft pulley
5. Air conditioner compressor
WARNING
Be sure the ignition switch is in the OFF or LOCK
position before servicing drive belts. The en-
gine could rotate unexpectedly.
1. Visually inspect each belt for signs ofunusual wear, cuts, fraying or looseness.
If the belt is in poor condition or loose,
have it replaced or adjusted by an INFINITI
retailer.
2. Have the belts checked regularly for con- dition and tension in accordance with the
maintenance schedule in your “INFINITI
Service and Maintenance Guide”.WARNING
Be sure the engine and the ignition switch are
off and that the parking brake is engaged
securely.
CAUTION
Be sure to use the correct socket to remove the
spark plugs. An incorrect socket can damage
the spark plugs.
SDI2533
DRIVE BELTS SPARK PLUGS
Maintenance and do-it-yourself8-17

4. Align the tips of the upper and lower parts
1, and then push them together until it
is securely closed
2.
5. Push the buttons two or three times to check its operation.
See an INFINITI retailer if you need any assis-
tance for replacement. FCC Notice:
This device complies with Part 15 of FCC Rules
and RSS-Gen of IC Rules. Operation is subject to
the following two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, in-
cluding interference that may cause undesired
operation of this device.
SDI2452
Maintenance and do-it-yourself8-25

recommended by the tire chain manufacturer to
ensure a tight fit. Loose end links of the tire
chain must be secured or removed to prevent
the possibility of whipping action damage to
the fenders or underbody. If possible, avoid
fully loading your vehicle when using tire
chains. In addition, drive at a reduced speed.
Otherwise, your vehicle may be damaged
and/or vehicle handling and performance may
be adversely affected.
Tire chains must be installed only on the rear
wheels and not on the front wheels.
Never install tire chains on a TEMPORARY USE
ONLY spare tire.
Do not use tire chains on dry roads. Driving with
tire chains in such conditions can cause dam-
age to the various mechanisms of the vehicle
due to some overstress.
CHANGING WHEELS AND TIRES
Tire rotation
INFINITI recommends rotating the tires
every 7,500 miles (12,000 km). (See
“FLAT TIRE” in the “6. In case of emer-
gency” section for tire replacing proce-
dures.)
As soon as possible, tighten the wheel
nuts to the specified torque with a torque
wrench.Wheel nut tightening torque:
98 ft-lb (133 N·m)
The wheel nuts must be kept tightened to
the specification at all times. It is recom-
mended that wheel nuts be tightened to
the specification at each tire rotation in-
terval.
WARNING
●After rotating the tires, check and ad-
just the tire pressure.
●Retighten the wheel nuts when the
vehicle has been driven for 600 miles
(1,000 km) (also in cases of a flat tire,
etc.).
●For additional information regarding
tires, refer to “Important Tire Safety
Information” (US) or “Tire Safety In-
formation” (Canada) in the Warranty
Information Booklet.
SDI1662
8-36Maintenance and do-it-yourself

9 Technical and consumer information
Capacities and recommended fuel/lubricants........ 9-2
Fuel recommendation ........................... 9-4
Engine oil and oil filter recommendation ......... 9-6
Air conditioning system refrigerant and
lubricant recommendations ..................... 9-7
Specifications ..................................... 9-8
Engine ........................................ 9-8
Wheels and tires ............................... 9-9
Dimensions .................................... 9-9
When traveling or registering your vehicle in
another country ................................... 9-9
Vehicle identification ............................. 9-10
Vehicle Identification Number (VIN) plate ........9-10
Vehicle identification number
(chassis number) .............................. 9-10
Engine serial number .......................... 9-10
F.M.V.S.S./C.M.V.S.S. certification label ..........9-11
Emission control information label ...............9-11
Tire and loading information label ...............9-11
Air conditioner specification label ...............9-12
Installing front license plate .......................9-12
Vehicle loading information .......................9-12
Terms ........................................ 9-12Vehicle load capacity
.......................... 9-14
Securing the load .............................. 9-15
Loading tips .................................. 9-16
Measurement of weights ....................... 9-16
Towing a trailer .................................. 9-17
Maximum load limits .......................... 9-17
Maximum gross vehicle weight (GVW)/
maximum gross axle weight (GAW) .............9-19
Towing load/specification ......................9-21
Towing safety ................................. 9-21
Flat towing ................................... 9-28
Uniform tire quality grading .......................9-28
Treadwear .................................... 9-28
Traction AA, A, B and C ........................ 9-29
Temperature A, B and C ....................... 9-29
Emission control system warranty .................9-29
Reporting safety defects .......................... 9-30
Readiness

for Inspection/Maintenance (I/M) test ....9-31
Event Data Recorders (EDR) .......................9-32
Owner’s Manual/Service Manual order
information ...................................... 9-32
In the event of a collision ......................9-33

3.Subtract the combined weight of the
driver and passengers from XXX kg or
XXX lbs.
4.The resulting figure equals the avail-
able amount of cargo and luggage
load capacity. For example, if the XXX
amount equals 1400 lbs. and there
will be five 150 lb. passengers in your
vehicle, the amount of available
cargo and luggage load capacity is
650 lbs. (1400 750 (5 x 150) = 650
lbs) or (640 340 (5 x 70) = 300 kg.)
5.Determine the combined weight of
luggage and cargo being loaded on
the vehicle. That weight may not
safely exceed the available cargo and
luggage load capacity calculated in
Step 4.
6.If your vehicle will be towing a trailer,
load from your trailer will be trans-
ferred to your vehicle. Consult this
manual to determine how this re-
duces the available cargo and lug-
gage load capacity of your vehicle. Before driving a loaded vehicle, confirm
that you do not exceed the Gross Vehicle
Weight Rating (GVWR) or the Gross Axle
Weight Rating (GAWR) for your vehicle.
(See “MEASUREMENT OF WEIGHTS” later
in this section.)
Also check tires for proper inflation pres-
sures. See the Tire and Loading Informa-
tion label.
SECURING THE LOAD
There are tie down hooks located in the cargo
area as shown. The tie down hooks can be used
to secure cargo with ropes or other types of
straps.
Do not apply a total load of more than 22 lb (10
kg) to a single hook
Aor 7 lb (3 kg) to a single
hook
Bwhen securing cargo.
WARNING
● Properly secure all cargo with ropes or
straps to help prevent it from sliding or shift-
ing. Do not place cargo higher than the seat-
backs. In a sudden stop or collision, unse-
cured cargo could cause personal injury.
SIC4446
Technical and consumer information9-15

●The child restraint top tether strap may be
damaged by contact with items in the cargo
area. Secure any items in the cargo area. Your
child could be seriously injured or killed in a
collision if the top tether strap is damaged.
● Do not load your vehicle any heavier than the
GVWR or the maximum front and rear
GAWRs. If you do, parts of your vehicle can
break, tire damage could occur, or it can
change the way your vehicle handles. This
could result in loss of control and cause per-
sonal injury.
LOADING TIPS
●The GVW must not exceed GVWR or
GAWR as specified on the F.M.V.S.S./
C.M.V.S.S. certification label.
●Do not load the front and rear axle to
the GAWR. Doing so will exceed the
GVWR.
WARNING
●Properly secure all cargo to help pre-
vent it from sliding or shifting. Do not
place cargo higher than the seatbacks.
In a sudden stop or collision, unsecured
cargo could cause personal injury.
●Do not load your vehicle any heavier
than the GVWR or the maximum front
and rear GAWRs. If you do, parts of your
vehicle can break, tire damage could oc-
cur, or it can change the way your ve-
hicle handles. This could result in loss
of control and cause personal injury.
●Overloading not only can shorten the
life of your vehicle and the tire, but can
cause unsafe vehicle handling and
long braking distance. This may cause
a premature tire failure, which could
result in a serious accident and per-
sonal injury. Failures caused by over-
loading are not covered by the vehi-
cle’s warranty.
MEASUREMENT OF WEIGHTS
Secure loose items to prevent weight
shifts that could affect the balance of
your vehicle. When the vehicle is loaded,
drive to a scale and weigh the front and
the rear wheels separately to determine
axle loads. Individual axle loads should
not exceed either of the gross axle
weight ratings (GAWR). The total of the
axle loads should not exceed the gross
vehicle weight rating (GVWR). These rat-
ings are given on the vehicle certifica-
tion label. If weight ratings are ex-
ceeded, move or remove items to bring
all weights below the ratings.
9-16
Technical and consumer information