ignition INFINITI QX50 2021 Owner's Manual

To shut off the engine in an emergency situ-
ation while driving, perform the following
procedure:
– Rapidly push the push-button ignitionswitch three consecutive times in less than
1.5 seconds, or
– Push and hold the push-button ignition switch for more than 2 seconds.TIRE PRESSURE MONITORING
SYSTEM (TPMS)
This vehicle is equipped with Tire Pressure
Monitoring System (TPMS). It monitors tire
pressure of all tires. When the low tire pres-
sure warning light is lit, and the “Tire Pressure
Low - Add Air” warning appears in the vehicle
information display, one or more of your tires
is significantly under-inflated. The system
also displays pressure of all tires (except the
spare tire) on the vehicle information display
screen by sending a signal from a sensor that
is installed in each wheel. If the vehicle is
being driven with low tire pressure, the TPMS
will activate and warn you of it by the low tire
pressure warning light. This system will acti-
vate only when the vehicle is driven at speeds
above 16 mph (25 km/h). For additional in-
formation, see “Warning lights, indicator
lights and audible reminders” (P. 2-9) and
“Tire Pressure Monitoring System (TPMS)”
(P. 8-27).
WARNING
• Radio waves could adversely affect elec-
tric medical equipment. Those who use a
pacemaker should contact the electric
medical equipment manufacturer for the
possible influences before use. •
If the low tire pressure warning light illu-
minates while driving, avoid sudden
steering maneuvers or abrupt braking,
reduce vehicle speed, pull off the road to
a safe location and stop the vehicle as
soon as possible. Driving with under-
inflated tires may permanently damage
the tires and increase the likelihood of
tire failure. Serious vehicle damage could
occur and may lead to an accident and
could result in serious personal injury.
Check the tire pressure for all four tires.
Adjust the tire pressure to the recom-
mended COLD tire pressure shown on
the Tire and Loading Information label to
turn the low tire pressure warning light
OFF. If the light still illuminates while
driving after adjusting the tire pressure,
a tire may be flat or the TPMS may be
malfunctioning. If you have a flat tire,
replace it with a replacement tire as soon
as possible. If no tires are flat and all tires
are properly inflated, have the vehicle
checked. It is recommended that you
visit an INFINITI retailer for this service.
EMERGENCY ENGINE SHUT OFF FLAT TIRE
In case of emergency6-3

To start your engine with a booster battery,
the instructions and precautions below must
be followed.
WARNING
• If done incorrectly, jump starting can
lead to a battery explosion, resulting in
severe injury or death. It could also dam-
age your vehicle.
• Explosive hydrogen gas is always pres-
ent in the vicinity of the battery. Keep all
sparks and flames away from the
battery.
• Do not allow battery fluid to come into
contact with eyes, skin, clothing or
painted surfaces. Battery fluid is a corro-
sive sulfuric acid solution which can
cause severe burns. If the fluid should
come into contact with anything, imme-
diately flush the contacted area with
water.
• Keep battery out of the reach of children.
• The booster battery must be rated at 12
volts. Use of an improperly rated battery
can damage your vehicle. •
Whenever working on or near a battery,
always wear suitable eye protectors (for
example, goggles or industrial safety
spectacles) and remove rings, metal
bands, or any other jewelry. Do not lean
over the battery when jump starting.
• Do not attempt to jump start a frozen
battery. It could explode and cause seri-
ous injury.
• The automatic engine cooling fan (if so
equipped) may come on at any time with-
out warning, even if the ignition switch is
in the OFF position and the engine is not
running. To avoid injury, keep hands and
other objects away from it.
JUMP STARTING
In case of emergency6-5

WARNING
Always follow the instructions below. Fail-
ure to do so could result in damage to the
charging system and cause personal injury.
1. If the booster battery is in another vehicle, position the 2 vehicles to bring their bat-
teries near each other.
Do not allow the two vehicles to touch.
2. Apply the parking brake. Engage the P (Park) position. Switch off all unnecessary
electrical systems (lights, heater, air con-
ditioner, etc.). 3. Place the ignition switch to the OFF
position.
4. Connect the jumper cables in the se- quence illustrated (
OA,OB,OC,OD).
CAUTION
• Always connect positive (+) to positive
(+) and negative (−) to body ground (for
example, strut mounting bolt, engine lift
bracket, etc.) — not to the battery.
• Make sure the jumper cables do not
touch moving parts in the engine com-
partment and that the cable clamps do
not contact any other metal. 5. Start the engine of the booster vehicle and
let it run for a few minutes.
6. Keep the engine speed of the booster ve- hicle at about 2,000 rpm and start the
engine of the vehicle being jump started.
CAUTION
Do not keep the starter motor engaged for
more than 10 seconds. If the engine does
not start right away, place the ignition
switch in the OFF position and wait 3 to 4
seconds before trying again.
7. After starting the engine, carefully discon- nect the negative cable and then the posi-
tive cable.
LCE2223
6-6In case of emergency

Two-Wheel Drive models with
Continuously Variable Transmission
(CVT)
INFINITI recommends that your vehicle be
towed with the driving (front) wheels off the
ground or place the vehicle on a flatbed truck
as illustrated.
NOTE:
If the electronic parking brake is released,
the rear wheels can be grounded while tow-
ing. If the electronic parking brake is not re-
leased, towing dollies should be used. For
additional information, see “Electronic
parking brake” (P. 5-23).
CAUTION
• Never tow Continuously Variable Trans-
mission (CVT) models with the front
wheels on the ground or four wheels on
the ground (forward or backward), as
this may cause serious and expensive
damage to the transmission. If it is nec-
essary to tow the vehicle with the rear
wheels raised always use towing dollies
under the front wheels.
• When towing Continuously Variable
Transmission (CVT) models with the rear
wheels on the ground or on towing
dollies:
– Place the ignition switch in the OFF
position, and secure the steering
wheel in a straight-ahead position
with a rope or similar device. Never
secure the steering wheel by placing
the ignition switch in the LOCK posi-
tion. This may damage the steering
lock mechanism (for models with a
steering lock mechanism).
NOTE:
If the battery is completely drained the
transmission will not manually shift to other
positions.
LCE2371
6-10In case of emergency

FLOOR MATS (if so equipped)
WARNING
To avoid potential pedal interference that
may result in a collision, injury or death:
• NEVER place a floor mat on top of an-
other floor mat in the driver front posi-
tion or install them upside down or
backwards.
• Use only Genuine INFINITI floor mats or
equivalent floor mats, specifically de-
signed for use in your vehicle model and
model year. •
Properly position the mats in the floor-
well using the floor mat positioning
hook. For additional information, see
"Floor mat installation" (P. 7-6).
• Make sure the floor mat does not inter-
fere with pedal operation.
• Periodically check the floor mats to make
sure they are properly installed.
• After cleaning the vehicle interior, check
the floor mats to make sure they are
properly installed.
The use of Genuine INFINITI floor mats can
extend the life of your vehicle carpet and
make it easier to clean the interior. Mats
should be maintained with regular cleaning
and replaced if they become excessively
worn.
Floor mat installation
Your vehicle is equipped with floor mat re-
tainer clips. The number and shape of the
floor mat retainer clips for each seating posi-
tion varies depending on the vehicle. When installing Genuine INFINITI floor mats,
follow the installation instructions provided
with the mat and the following:
1. With the ignition in the OFF position, the
shift lever in P (Park) position and with the
parking brake fully applied, position the
floor mat in the floorwell so that the floor
mat grommet holes are aligned with the
retainer clips.
2. Secure the grommet holes into the clips and ensure that the floor mat is properly
positioned.
3. Make sure the floor mat does not inter- fere with pedal operation. With the igni-
tion still in the OFF position, the shift lever
in the P (Park) position and with the park-
ing brake applied, fully apply and release
all pedals. The floor mat must not inter-
fere with pedal operation or prevent the
pedal from returning to its normal
position.
It is recommended that you visit an INFINITI
retailer for details about installing the floor
mats in your vehicle.
LAI2094
7-6Appearance and care

When performing any inspection or mainte-
nance work on your vehicle, always take care
to prevent serious accidental injury to your-
self or damage to the vehicle. The following
are general precautions which should be
closely observed.
WARNING
• Park the vehicle on a level surface, apply
the parking brake securely and block the
wheels to prevent the vehicle from mov-
ing. Move the shift lever to P (Park).
• Be sure the ignition switch is in the OFF
or LOCK position when performing any
parts replacement or repairs.
• If you must work with the engine run-
ning, 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 work-
ing on your vehicle.
• Always wear eye protection whenever
you work on your vehicle.
• Your vehicle is equipped with an auto-
matic engine cooling fan. It may come on
at any time without warning, even if the
ignition switch is in the OFF position and the engine is not running. To avoid injury,
always disconnect the negative battery
cable before working near the fan.
• 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
supported 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 the fuel tank and battery.
• Because the fuel lines on gasoline engine
models are under high pressure even
when the engine is off, it is recommended
that you visit an INFINITI retailer for ser-
vice of the fuel filter or fuel lines.
CAUTION
• Do not work under the hood while the
engine is hot. Turn the engine off and
wait until it cools down.
• Avoid contact with used engine oil and
coolant. Improperly disposed engine oil,
engine coolant and/or other vehicle flu-
ids can damage the environment. Always
conform to local regulations for disposal
of vehicle fluid. •
Never leave the engine or Continuously
Variable Transmission (CVT) related
component harnesses disconnected
while the ignition switch is in the ON
position.
• Never connect or disconnect the battery
or any transistorized component while
the ignition switch is in the ON position.
NOTE:
If the battery is completely drained the
transmission will not manually shift to other
positions.
This “Do-it-yourself” section gives instruc-
tions regarding only those items which are
relatively easy for an owner to perform.
A Genuine INFINITI service manual is also
available. For additional information, see
“Owner’s Manual/Service Manual order in-
formation” (P. 10-33).
You should be aware that incomplete or im-
proper servicing may result in operating diffi-
culties or excessive emissions, and could af-
fect warranty coverage. If in doubt about any
servicing, it is recommended that you have it
done by an INFINITI retailer.
MAINTENANCE PRECAUTIONS
8-2Do-it-yourself

1. Automatic tensioner pulley
2. Generator pulley
3. Water pump pulley
4. Air conditioner compressor pulley
5. Crankshaft pulley
WARNING
Be sure the ignition switch is in the OFF or
LOCK position before servicing drive belt.
The engine could rotate unexpectedly. 1. Visually inspect the belt for signs of un-
usual wear, cuts, or fraying. If the belt is in
poor condition, have it replaced. It is rec-
ommended that you visit an INFINITI re-
tailer for this service.
2. Have the belt checked regularly for condition.
REPLACING SPARK PLUGS
Iridium-tipped spark plugs
It is not necessary to replace iridium-tipped
OAspark plugs as frequently as conventional
type spark plugs because they last much lon-
ger. Follow the maintenance log shown in the
"Maintenance and schedules" section of this
manual. Do not service iridium-tipped spark
plugs by cleaning or regapping.
• Always replace spark plugs with recom-
mended or equivalent ones.
WDI0638SDI1895
DRIVE BELT SPARK PLUGS
Do-it-yourself8-15

WARNING
Be sure the engine and 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.
If replacement is required, it is recommended
that you visit an INFINITI retailer for this
service.
WARNING
• Operating the engine with the air cleaner
filter off can cause you or others to be
burned. The air cleaner filter not only
cleans the intake air, it also stops the
flame if the engine backfires. If the air
cleaner is not installed and the engine
backfires, you could be burned. Never
drive with the air cleaner filter off. Be
cautious working on the engine when the
air cleaner is off. •
Never pour fuel into the throttle body or
attempt to start the engine with the air
cleaner removed. Doing so could result in
serious injury.
To remove the filter from the air cleaner, push
the clips
OAand pull the cover upward.
The viscous paper type filter element should
not be cleaned and reused. Replace it accord-
ing to the maintenance log shown in the
“Maintenance and schedules” section of this
manual.
When replacing the air filter, wipe the inside
of the air cleaner housing and the cover with
a damp cloth.
NOTE:
After installing a new air cleaner filter,
make sure the air cleaner cover is seated
in the housing and latch the clips
OA.
IN-CABIN MICROFILTER
The in-cabin microfilter restricts the entry of
airborne dust and pollen particles and re-
duces some objectionable outside odors. The
filter is located behind the glove box. For
additional information on change intervals,
see "Maintenance and schedules" (P. 9-2).
LDI3165
AIR CLEANER
8-16Do-it-yourself

If replacement is required, it is recommended
that you visit an INFINITI retailer for this
service.CLEANING
If your windshield is not clear after using the
windshield-washer or if a wiper blade chat-
ters when running, wax or other material may
be on the blade or windshield.
Clean the outside of the windshield with a
washer solution or a mild detergent. Your
windshield is clean if beads do not form when
rinsing with clear water.
Clean each blade by wiping it with a cloth
soaked in a washer solution or a mild deter-
gent. Then rinse the blades with clear water.
If your windshield is still not clear after clean-
ing the blades and using the wiper, replace
the blades.
CAUTION
Worn windshield wiper blades can damage
the windshield and impair driver vision.
REPLACING
Replace the wiper blades if they are worn.
To replace the windshield wiper blades, fol-
low the procedure below:
1. When the ignition switch is ON or within 60 seconds after placing the ignition
switch from the ON to OFF position,
place the windshield wiper and washer
lever into the OFF position.
2. Rapidly lift the windshield wiper and washer lever
OAupwards twice within 0.5
seconds. This action will cause the wipers
to automatically take the service position.
LDI3250
WINDSHIELD WIPER BLADES
Do-it-yourself8-17

If any electrical equipment does not operate,
check for an open fuse.
Fuses are used in the passenger and engine
compartment. Spare fuses are provided and
can be found in the passenger compartment
fuse box.
When installing a fuse make sure the fuse is
installed in the fuse box securely.ENGINE COMPARTMENT
WARNING
Never use a fuse of higher or lower amper-
age rating than that specified on the fuse
box cover. This could damage the electrical
system or electronic control units or cause
a fire. If any electrical equipment does not come on,
check for an open fuse.
1. Be sure the ignition switch and the head-
light switch are OFF.
2. Open the engine hood.
3. Remove the fuse box cover by pushing the tabs and lifting the cover up.
4. Remove the fuse with the fuse puller. The fuse puller is located in the fuse block in
the passenger compartment.
LDI2997LDI3174
FUSES
8-20Do-it-yourself