2018 INFINITI Q50-HYBRID tire type

SMALL CHILDREN
Children that are over 1 year old and weigh
at least 20 lbs (9 kg) should remain in a rear-
facing child restraint as long as possible up
to the height or weight limit of the child
restraint. Children who outgrow the height
or weight limit of the rear-facing child
restraint and are at least 1 year old should
be secured in a forward-facing child re-
straint with a harness. Refer to the manu-
facturer’s instructions for minimum and
maximum weight and height recommenda-
tions. INFINITI recommends that small chil-
dren be placed in child restraints that comply
with Federal Motor Vehicle Safety Stan-
dards or Canadian Motor Vehicle Safety
Standards. You should choose a child re-
straint that fits your vehicle and always
follow the manufacturer’s instructions for
installation and use.
LARGER CHILDREN
Children should remain in a forward-facing
child restraint with a harness until they reach
the maximum height or weight limit allowed
by the child restraint manufacturer.
Once a child outgrows the height or weight
limit of the harness-equipped forward-fa-
cing child restraint, INFINITI recommends
that the child be placed in a commercially
available booster seat to obtain proper seatbelt fit. For a seat belt to fit properly, the
booster seat should raise the child so that
the shoulder belt is properly positioned
across the chest and the top, middle portion
of the shoulder. The shoulder belt should not
cross the neck or face and should not fall off
the shoulder. The lap belt should lie snugly
across the lower hips or upper thighs, not the
abdomen.
A booster seat can only be used in seating
positions that have a three-point type seat
belt. The booster seat should fit the vehicle
seat and have a label certifying that it
complies with Federal Motor Vehicle Safety
Standards or Canadian Motor Vehicle
Safety Standards.
A booster seat should be used until the child
can pass the seat belt fit test below:
.
Are the child’s back and hips against the
vehicle seatback?
. Is the child able to sit without slouching?
. Do the child’s knees bend easily over the
front edge of the seat with feet flat on
the floor?
. Can the child safely wear the seat belt
(lap belt low and snug across the hips
and shoulder belt across mid-chest and
shoulder)?
. Is the child able to use the properly
adjusted head restraint/headrest? .
Will the child be able to stay in position
for the entire ride?
Safety — Seats, seat belts and supplemental restraint system1-17

System maintenance .............................................. 5-120
Break-in schedule .......................................................... 5-121
Fuel Efficient Driving Tips .......................................... 5-121
Increasing fuel economy .............................................. 5-122
Intelligent All-Wheel Drive (AWD) (if
so equipped) .................................................................... 5-123
Parking/parking on hills .............................................. 5-125
Power steering ............................................................... 5-126 Direct Adaptive Steering type .............................. 5-126
Brake system ................................................................. 5-128 Braking precautions ............................................... 5-128
Parking brake break-in ........................................... 5-129
Brake assist ..................................................................... 5-129 Brake assist ............................................................... 5-129
Anti-lock Braking System (ABS) .......................... 5-129
Vehicle Dynamic Control (VDC) system ................ 5-130 Rise-up and build-up .............................................. 5-131
Brake force distribution ......................................... 5-131 Active trace control ...................................................... 5-132
Hill Start Assist system .............................................. 5-134
Chassis control ............................................................. 5-134
Cold weather driving ................................................... 5-135
Freeing a frozen door lock .................................. 5-135
Antifreeze ................................................................. 5-135
12-volt Battery ....................................................... 5-135
Draining of coolant water ................................... 5-135
Tire equipment ........................................................ 5-135
Special winter equipment .................................... 5-135
Driving on snow or ice .......................................... 5-135
Engine block heater (if so equipped) ............... 5-136
Active noise cancellation/Active
sound enhancement ..................................................... 5-137
Active noise cancellation ..................................... 5-137
Active sound enhancement ................................. 5-137

5-10Starting and driving
vehicle, road and traffic.
WARNING
The following actions can increase the
chance of losing control of the vehicle if
there is a sudden loss of tire air pressure.
Losing control of the vehicle may cause a
collision and result in personal injury.
.The vehicle generally moves or pulls
in the direction of the flat tire.
. Do not rapidly apply the brakes.
. Do not rapidly release the accelerator
pedal.
. Do not rapidly turn the steering
wheel.
1. Remain calm and do not overreact.
2. Maintain a firm grip on the steering wheel with both hands and try to hold
a straight course.
3. When appropriate, slowly release the accelerator pedal to gradually slow the
vehicle.
4. Gradually steer the vehicle to a safe location off the road and away from
traffic if possible.
5. Lightly apply the brake pedal to gradu- ally stop the vehicle. 6. Turn on the hazard warning flashers and
either contact a roadside emergency
service to change the tire or see “Jacking
up the vehicle and replacing tires” (P.8-
39) of this Owner’s Manual.DRINKING ALCOHOL/DRUGS
AND DRIVING
WARNING
Never drive under the influence of alco-
hol or drugs. Alcohol in the bloodstream
reduces coordination, delays reaction
time and impairs judgement. Driving
after drinking alcohol increases the like-
lihood of being involved in an accident
injuring yourself and others. Addition-
ally, if you are injured in an accident,
alcohol can increase the severity of the
injury.
INFINITI is committed to safe driving. How-
ever, you must choose not to drive under the
influence of alcohol. Every year thousands of
people are injured or killed in alcohol-related
accidents. Although the local laws vary on
what is considered to be legally intoxicated,
the fact is that alcohol affects all people
differently and most people underestimate
the effects of alcohol. Remember, drinking and driving don’t mix!
And that is true for drugs, too (over-the-
counter, prescription, and illegal drugs).
Don’t drive if your ability to operate your
vehicle is impaired by alcohol, drugs, or some
other physical condition.
INTELLIGENT ALL-WHEEL
DRIVE (AWD) DRIVING SAFETY
PRECAUTIONS (AWD models)
WARNING
.
Do not drive beyond the performance
capability of the tires, even with
Intelligent AWD engaged. Accelerat-
ing quickly, sharp steering maneuvers
or sudden braking may cause loss of
control.
. Always use tires of the same type,
size, brand, construction (bias, bias-
belted or radial), and tread pattern
on all four wheels. Install tire chains
on the rear wheels when driving on
slippery roads and drive carefully.
. This vehicle is not designed for off-
road (rough road) use. Do not drive
on sandy or muddy roads that tires
may get stuck in.

5-126Starting and driving
the road so the vehicle will move away
from the center of the road if it
moves.
4. Push the ignition switch to the OFF position.DIRECT ADAPTIVE STEERING
TYPE
WARNING
.When the power steering warning
light illuminates with the INFINITI
Direct Response Hybrid
®System run-
ning, the power assist for the steer-
ing will cease operation. You will still
have control of the vehicle, but the
steering will be harder to operate.
. If wheels or tires other than the
INFINITI recommended ones are
used, Direct Adaptive Steering may
not operate properly and the power
steering warning light may illumi-
nate.
. Do not modify the vehicle’s suspen-
sion. If suspension parts such as
shock absorbers, struts, springs, sta-
bilizer bars, bushings and wheels are
not INFINITI recommended for your
vehicle or are extremely deteriorated,
Direct Adaptive Steering may not
operate properly and the power
steering warning light may illumi-
nate.
. Do not modify the vehicle’s steering.
If steering parts are not INFINITI recommended for your vehicle or are
extremely deteriorated, Direct Adap-
tive Steering may not operate prop-
erly and the power steering warning
light may illuminate.
. If the VDC warning light illuminates,
the power steering warning light may
also illuminate at the same time. Stop
the vehicle in a safe location, turn the
hybrid system off and restart the
hybrid system. If the power steering
warning light continues to illuminate,
have the system checked. It is recom-
mended you visit an INFINITI retailer
for this service. For the VDC system,
see “Vehicle Dynamic Control (VDC)
system” (P.5-130).
CAUTION
.Do not place the ignition switch is in
the ON position while the steering
wheel or a tire is removed.
. Do not turn the steering wheel as
much as possible while the ignition
switch is in any position other than
the ON position.
. Installing an accessory on the steer-
ing wheel, or changing the steering
POWER STEERING

to heat-up the brakes. Do this until the
brakes return to normal. Avoid driving the
vehicle at high speeds until the brakes
function correctly.
PARKING BRAKE BREAK-IN
Break in the parking brake shoes whenever
the stopping effect of the parking brake is
weakened or whenever the parking brake
shoes and/or drums/rotors are replaced, in
order to assure the best braking perfor-
mance.
This procedure is described in the vehicle
service manual. It is recommended you visit
an INFINITI retailer for this service.
BRAKE ASSIST
When the force applied to the brake pedal
exceeds a certain level, the Brake Assist is
activated generating greater braking force
than a conventional brake booster even with
light pedal force.
WARNING
The Brake Assist is only an aid to assist
braking operation and is not a collision
warning or avoidance device. It is the
driver’s responsibility to stay alert, drive
safely and be in control of the vehicle at
all times.
ANTI-LOCK BRAKING SYSTEM
(ABS)
WARNING
.The Anti-lock Braking System (ABS)
is a sophisticated device, but it
cannot prevent accidents resulting
from careless or dangerous driving
techniques. It can help maintain ve-
hicle control during braking on slip-
pery surfaces. Remember that
stopping distances on slippery sur- faces will be longer than on normal
surfaces even with ABS. Stopping
distances may also be longer on
rough, gravel or snow covered roads,
or if you are using tire chains. Always
maintain a safe distance from the
vehicle in front of you. Ultimately,
the driver is responsible for safety.
. Tire type and condition may also
affect braking effectiveness.
— When replacing tires, install the specified size of tires on all four
wheels.
— For detailed information, see “Wheels and tires” (P.8-28) of
this manual.
The Anti-lock Braking System (ABS) controls
the brakes so the wheels do not lock during
hard braking or when braking on slippery
surfaces. The system detects the rotation
speed at each wheel and varies the brake
fluid pressure to prevent each wheel from
locking and sliding. By preventing each
wheel from locking, the system helps the
driver maintain steering control and helps to
minimize swerving and spinning on slippery
surfaces.
Starting and driving5-129
BRAKE ASSIST

5-132Starting and driving
ners, the VDC system may not oper-
ate properly and the VDC warning
light
may illuminate. Do not drive
on these types of roads.
. When driving on an unstable surface
such as a turntable, ferry, elevator or
ramp, the VDC warning light
may
illuminate. This is not a malfunction.
Restart the hybrid system after driv-
ing onto a stable surface.
. If wheels or tires other than the
INFINITI recommended ones are
used, the VDC system may not oper-
ate properly and the VDC warning
light
may illuminate.
. The VDC system is not a substitute
for winter tires or tire chains on a
snow covered road. This system senses driving based on the
driver’s steering and acceleration/braking
patterns, and controls brake pressure at
individual wheels to help smooth vehicle
response.
When the SPORT mode is selected by the
INFINITI Drive Mode Selector, the amount
of brake control provided by the active trace
control is reduced.
When the PERSONAL mode is selected, the
active trace control can be set to ON
(enabled) or OFF (disabled). See “INFINITI
Drive Mode Selector” (P.5-21).
When the VDC OFF switch is used to turn
off the VDC system, the active trace control
is also turned off.
ACTIVE TRACE CONTROL

FREEING A FROZEN DOOR LOCK
To prevent a door lock from freezing, apply
deicer through the key hole. If the lock
becomes frozen, heat the key before insert-
ing it into the key hole or use the Intelligent
Key system.
ANTIFREEZE
In the winter when it is anticipated that the
outside temperature will drop below 32°F
(0°C), check antifreeze to assure proper
winter protection. For additional informa-
tion, see “Engine cooling system” (P.8-5) and
“Inverter cooling system” (P.8-7).
12-VOLT BATTERY
If the 12-volt battery is not fully charged
during extremely cold weather conditions,
the battery fluid may freeze and damage the
12-volt battery. To maintain maximum effi-
ciency, the 12-volt battery should be
checked regularly. For additional informa-
tion, see “12-volt battery” (P.8-14).
DRAINING OF COOLANT WATER
If the vehicle is to be left outside without
antifreeze, drain the cooling system, includ-
ing the engine block. Refill before operating
the vehicle. For details, see “Engine cooling
system” (P.8-5) and “Inverter cooling sys-
tem” (P.8-7).
TIRE EQUIPMENT
SUMMER tires have a tread designed to
provide superior performance on dry pave-
ment. However, the performance of these
tires will be substantially reduced in snowy
and icy conditions. If you operate your
vehicle on snowy or icy roads, INFINITI
recommends the use of MUD & SNOW or
ALL SEASON tires on all four wheels. It is
recommended you consult an INFINITI re-
tailer for the tire type, size, speed rating and
availability information.
For additional traction on icy roads, studded
tires may be used. However, some U.S.
states and Canadian provinces prohibit their
use. Check local, state and provincial laws
before installing studded tires.
Skid and traction capabilities of studded
snow tires, on wet or dry surfaces, may be
poorer than that of non-studded snow tires.
Tire chains may be used. For details, see
“Tire chains” (P.8-35) of this manual.
Intelligent All-Wheel Drive (AWD)
models
If you install snow tires, they must also be
the same size, brand, construction and tread
pattern on all four wheels.
SPECIAL WINTER EQUIPMENT
It is recommended that the following items
be carried in the vehicle during winter:
.A scraper and stiff-bristled brush to
remove ice and snow from the windows
and wiper blades.
. A sturdy, flat board to be placed under
the jack to give it firm support.
. A shovel to dig the vehicle out of
snowdrifts.
. Extra window washer fluid to refill the
reservoir tank.
DRIVING ON SNOW OR ICE
WARNING
. Wet ice (32°F, 0°C and freezing rain),
very cold snow or ice can be slick and
very hard to drive on. The vehicle will
have much less traction or “grip”
under these conditions. Try to avoid
driving on wet ice until the road is
salted or sanded.
. Whatever the condition, drive with
caution. Accelerate and slow down
with care. If accelerating or down-
shifting too fast, the drive wheels will
lose even more traction.
Starting and driving5-135
COLD WEATHER DRIVING

8 Do-it-yourself
Maintenance precautions ................................................ 8-2
Engine compartment check locations ......................... 8-3VQ35HR engine ........................................................... 8-3
Engine cooling system ..................................................... 8-5 Checking engine coolant level .................................. 8-6
Changing engine coolant ........................................... 8-7
Inverter cooling system ................................................... 8-7 Checking inverter coolant level ................................ 8-8
Changing inverter coolant ......................................... 8-9
Engine oil ........................................................................\
..... 8-9
Checking engine oil level ............................................ 8-9
Changing engine oil and oil filter .......................... 8-10
Automatic Transmission Fluid (ATF) ......................... 8-12
Brake fluid ........................................................................\
. 8-12
Window washer fluid ..................................................... 8-13
12-volt battery ................................................................. 8-14
Checking battery fluid level .................................... 8-15
Jump starting .............................................................. 8-15
Spark plugs ........................................................................\
8-15 Replacing spark plugs ............................................... 8-16
Air cleaner ........................................................................\
.. 8-16 Windshield wiper blades ............................................... 8-17
Cleaning ...................................................................... 8-17
Replacing .................................................................... 8-18
Brakes ........................................................................\
........ 8-18 Self-adjusting brakes .............................................. 8-18
Brake pad wear warning ....................................... 8-18
Fuses ........................................................................\
.......... 8-19 Engine compartment and trunk ........................... 8-19
Passenger compartment ....................................... 8-20
Intelligent Key battery replacement .......................... 8-21
Lights ........................................................................\
........ 8-24 Headlights .................................................................. 8-25
Exterior and interior lights .................................... 8-25
Wheels and tires ............................................................ 8-28 Tire pressure ............................................................. 8-28
Tire labeling ............................................................... 8-32
Types of tires ........................................................... 8-34
Tire chains .................................................................. 8-35
Changing wheels and tires .................................... 8-36
Jacking up the vehicle and replacing tires ........ 8-39