Infiniti Q50 (2021 year). Manual in english — page 25

8-18

Do-it-yourself

SDI1754

5. If the fuse is open

, replace it with a

new fuse

. Spare fuses are stored in the

passenger compartment fuse box.

6. If a new fuse also opens, have the

electrical system checked and repaired.
It is recommended you visit an INFINITI
retailer for this service.

Fusible links

If any electrical equipment does not operate
and fuses are in good condition, check the
fusible links. If any of these fusible links are
melted, replace only with genuine INFINITI
parts.

JVM0256X

PASSENGER COMPARTMENT

WARNING

Never use a fuse of a higher or lower
amperage rating than that specified on
the fuse box cover. This could damage
the electrical system or electronic con-
trol units or cause a fire.

If any electrical equipment does not operate,
check for an open fuse.
1. Be sure the ignition switch is placed in

the OFF or LOCK position and the
headlight switch is turned to OFF.

2. Open the fuse box lid.
3. Remove the fuse with the fuse puller

.

4. If the fuse is open, replace it with a new

fuse.

5. If a new fuse also opens, have the

electrical system checked and repaired.
It is recommended you visit an INFINITI
retailer for this service. Spare fuses are
stored in the fuse box.

JVM0257X

Extended storage fuse switch (if so
equipped)

To reduce battery drain, the extended
storage fuse switch comes from the factory
switched off. Prior to delivery of your
vehicle, the switch is pushed in (switched
on) and should always remain on.
If the extended storage fuse switch is not
pushed in (switched on), the “Shipping Mode
On, Push Storage Fuse” warning may appear
in the vehicle information display. See “19.
Extended storage fuse warning” (P.2-22).
If any electrical equipment does not operate,
remove the extended storage fuse switch
and check for an open fuse.

NOTE:

If the extended storage fuse switch mal-
functions or if the fuse is open, it is not
necessary to replace the switch. In this case,
remove the extended storage fuse switch
and replace it with a new fuse of the same
rating.
How to remove the extended storage fuse
switch:

1. To remove the extended storage fuse

switch, be sure the ignition switch is in
the OFF or LOCK position.

2. Be sure the headlight switch is in the

OFF position.

3. Remove the fuse box cover.
4. Pinch the locking tabs

found on each

side of the storage fuse switch.

5. Pull the storage fuse switch straight out

from the fuse box

.

CAUTION

Be careful not to allow children to
swallow the battery and removed parts.

Do-it-yourself

8-19

INTELLIGENT KEY BATTERY
REPLACEMENT

8-20

Do-it-yourself

WAI0070X

To replace the battery:
1. Release the lock knob at the back of the

Intelligent Key and remove the mechan-
ical key.

2. Insert a flat-blade screwdriver wrapped

with a cloth into the slit of the corner and
twist it to separate the upper part from

the lower part.

3. Replace the battery with a new one.

Recommended battery:
CR2032 or equivalent

.

Do not touch the internal circuit and

electric terminals as it could cause a
malfunction.

.

Hold the battery by the edges. Hold-

ing the battery across the contact
points will seriously deplete the sto-
rage capacity.

.

Make sure that the + side faces the

bottom of the case.

WAI0071X

4. Align the tips of the upper and lower

parts

, and then push them together

until it is securely closed.

5. Operate the buttons to check its opera-

tion.

If you need any assistance for replacement,
it is recommended you visit an INFINITI
retailer for this service.

FCC Notice:

For USA

FCC ID: KR5TXN7

This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions: (1) this device
may not cause harmful interference, and (2)

this device must accept any interference
received, including interference that may
cause undesired operation.

Changes or modifications not expressly
approved by the party responsible for
compliance could void the user’s authority
to operate the equipment.

This equipment complies with FCC radiation
exposure limits set forth for portable use
conditions.

For Canada

This device complies with Industry Canada
licence-exempt RSS standard(s). Operation
is subject to the following two conditions:
(1) this device may not cause interference,
and (2) this device must accept any inter-
ference, including interference that may
cause undesired operation of the device.

Do-it-yourself

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Do-it-yourself

JVM0828X

1.

Headlight (high-beam)

2.

Headlight (low-beam)

3.

Parking light, daytime running light

4.

Map light

5.

Rear personal light

6.

Side turn signal light

7.

Front turn signal light

8.

Fog light

9.

Front side marker light

10. Step light
11. Courtesy light
12. High-mounted stop light
13. Back-up light
14. Tail light
15. Rear turn signal light
16. Tail/stop light
17. Rear side marker light
18. License plate light
19. Trunk light

LIGHTS

HEADLIGHTS

If replacement is required, it is recommended
you visit an INFINITI retailer for this service.
Fog may temporarily form inside the lens of
the exterior lights in the rain or in a car wash.
A temperature difference between the inside
and the outside of the lens causes the fog.
This is not a malfunction. If large drops of
water collect inside the lens, it is recom-
mended you visit an INFINITI retailer for this
service.

EXTERIOR AND INTERIOR LIGHTS

Item

Wattage (W)

Bulb No.

Headlight*

High/Low beams

LED

—

Front turn signal light*

LED

—

Front fog light*

LED

—

Parking light*/Daytime running light*

LED

—

Front side marker light*

LED

—

Side turn signal light*

LED

—

Rear combination light*

back-up

LED

—

turn signal

LED

—

tail

LED

—

tail/stop

LED

—

side marker

LED

—

License plate light*

LED

—

Map light*

LED

—

Rear personal light

8

—

Vanity mirror light*

1.8

—

Step light

5

—

Console box light*

2

—

Inside door handle light* (if so equipped)

LED

—

Door trim light* (if so equipped)

LED

—

Front cup holder light*

LED

—

Footwell light*

LED

—

Trunk light

3.4

—

Courtesy light*

LED

—

High-mounted stop light*

LED

—

Do-it-yourself

8-23

8-24

Do-it-yourself

*: It is recommended you visit an INFINITI
retailer for replacement.
NOTE: It is recommended that you check
with the Parts Department at an INFINITI
retailer for the latest information about
parts.

Replacement procedures

All other lights are either type A, B, C, D, E or
F. When replacing a bulb, first remove the
lens and/or cover.

SDI1679

SDI2031

Rear personal light

SDI2330

Step light

SDI1258A

Trunk light

If you have a flat tire, see “Flat tire” (P.6-3).

TIRE PRESSURE

Tire Pressure Monitoring System
(TPMS)

WARNING

Radio waves could adversely affect
electric medical equipment. Those who
use a pacemaker should contact the
electric medical equipment manufacturer
for the possible influences before use.

This vehicle is equipped with the Tire
Pressure Monitoring System (TPMS). It
monitors tire pressure of all tires except the
spare. When the low tire pressure warning
light is lit and the “Tire Pressure Low - Add
Air” warning appears in the vehicle informa-
tion display, one or more of your tires is
significantly under-inflated.
The TPMS will activate only when the
vehicle is driven at speeds above 16 MPH
(25 km/h). Also, this system may not detect
a sudden drop in tire pressure (for example a
flat tire while driving).
For more details, see “Low tire pressure
warning light” (P.2-13),“Tire Pressure Mon-
itoring System (TPMS)” (P.5-5) and “Tire

Do-it-yourself

8-25

WHEELS AND TIRES

8-26

Do-it-yourself

Pressure Monitoring System (TPMS)” (P.6-
3).

Tire inflation pressure

Check the pressure of the tires (in-
cluding the spare) often and always
prior to long distance trips. The
recommended tire pressure specifica-
tions are shown on the Tire and
Loading Information label under the
“Cold Tire Pressure” heading. The Tire
and Loading Information label is
affixed to the driver side center pillar.
Tire pressures should be checked
regularly because:

.

Most tires naturally lose air over

time.

.

Tires can lose air suddenly when

driven over potholes or other ob-
jects or if the vehicle strikes a curb
while parking.

The tire pressures should be checked
when the tires are cold. The tires are
considered COLD after the vehicle
has been parked for 3 or more hours,
or driven less than 1 mile (1.6 km) at
moderate speeds.

TPMS with Tire Inflation Indicator
provides visual and audible signals
outside the vehicle for inflating the
tires to the recommended COLD tire
pressure. (See “TPMS with Tire Infla-
tion Indicator” (P.5-8) about the
TPMS with Tire Inflation Indicator.)

Incorrect tire pressure, including un-
der inflation, may adversely affect
tire life and vehicle handling.

WARNING

.

Improperly inflated tires can fail
suddenly and cause an accident.

.

The Gross Vehicle Weight rat-
ing (GVWR) is located on the F.
M.V.S.S./C.M.V.S.S. label. The
vehicle weight capacity is indi-
cated on the Tire and Loading
Information label. Do not load
your vehicle beyond this capa-
city. Overloading your vehicle
may result in reduced tire life,
unsafe operating conditions
due to premature tire failure,
or unfavorable handling char-

acteristics and could also lead
to a serious accident. Loading
beyond the specified capacity
may also result in failure of
other vehicle components.

.

Before taking a long trip, or
whenever you heavily load your
vehicle, use a tire pressure
gauge to ensure that the tire
pressures are at the specified
level.

.

For additional information re-
garding tires, refer to “Impor-
tant Tire Safety Information”
(US) or “Tire Safety Informa-
tion” (Canada) in the Warranty
Information Booklet.

SDI2567

Tire and Loading Information label

Seating capacity: The maximum
number of occupants that can be
seated in the vehicle.
Vehicle load limit: See “Vehicle
loading information” (P.10-17).

Original size: The size of the tires
originally installed on the vehicle
at the factory.
Cold tire pressure: Inflate the
tires to this pressure when the
tires are cold. Tires are consid-
ered COLD after the vehicle has

been parked for 3 or more hours,
or driven less than 1 mile (1.6 km)
at moderate speeds. The recom-
mended cold tire inflation is set
by the manufacturer to provide
the best balance of tire wear,
vehicle handling, driveability, tire
noise, etc., up to the vehicle’s
GVWR.
Tire size — see “Tire labeling”
(P.8-29).
Spare tire size or compact spare
tire size (if so equipped)

Do-it-yourself

8-27

8-28

Do-it-yourself

SDI1949

Checking the tire pressure

1. Remove the valve stem cap from

the tire.

2. Press the pressure gauge squarely

onto the valve stem. Do not press
too hard or force the valve stem
sideways, or air will escape. If the
hissing sound of air escaping from
the tire is heard while checking the
pressure, reposition the gauge to
eliminate this leakage.

3. Remove the gauge.

4. Read the tire pressure on the

gauge stem and compare it to the
specification shown on the Tire
and Loading Information label.

5. Add air to the tire as needed. If too

much air is added, press the core of
the valve stem briefly with the tip
of the gauge stem to release
pressure. Recheck the pressure
and add or release air as needed.

6. Install the valve stem cap.
7. Check the pressure of all other

tires, including the spare.

8. Check the pressure when driving

the vehicle at speeds of 100 MPH
(160 km/h) or higher where it is
legal to do so.

WARNING

.

Driving at high speeds, 100
MPH (160 km/h) or higher
sustained where it is legal to
do so, can cause tires to have
excessive heat build up, which
may result in a tire failure

causing loss of control, crash,
injuries or even death. Some
high-speed rated tires require
inflation pressure adjustment
for high-speed operation.
When speed limits and road
conditions allow vehicle driving
at high speeds, make sure tires
are rated to support high speed
operation, tires are in optimal
conditions and pressure is ad-
justed to correct cold inflation
pressure for high speed opera-
tion.

.

Tires require adjustment to the
inflation pressure when driving
the vehicle at speeds of 100
MPH (160 km/h) or higher
where it is legal to do so. See
recommended tire inflation
chart for correct operating
pressure.

.

After vehicle high speed opera-
tion has ended, readjust the tire
pressure to the recommended
cold inflation pressure. (See
“Checking the tire pressure”

(P.8-28).)

Size

Cold Tire In-
flation Pres-

sure

Front Original Tire:
P225/55RF17 95V

35 psi, 240
kPa

Front Original Tire:
P225/50RF18 94V

35 psi, 240
kPa

Front Original Tire:
P245/40RF19 94V

35 psi, 240
kPa

Front Original Tire:
245/40RF19 94W

35 psi, 240
kPa

Rear Original Tire:
P225/55RF17 95V

35 psi, 240
kPa

Rear Original Tire:
P225/50RF18 94V

35 psi, 240
kPa

Rear Original Tire:
P245/40RF19 94V

35 psi, 240
kPa

Rear Original Tire:
245/40RF19 94W

35 psi, 240
kPa

Rear Original Tire:
265/35RF19 94W

35 psi, 240
kPa

Recommended tire inflation pressures
at speeds of 100 MPH (160 km/h) or
higher where it is legal to do so.

Size

Cold Tire In-
flation Pres-

sure

Front Original Tire:
P225/55RF17 95V

38 psi, 260
kPa

Front Original Tire:
P225/50RF18 94V

41 psi, 280
kPa

Front Original Tire:
P245/40RF19 94V

42 psi, 290
kPa

Front Original Tire:
245/40RF19 94W

42 psi, 290
kPa

Rear Original Tire:
P225/55RF17 95V

38 psi, 260
kPa

Rear Original Tire:
P225/50RF18 94V

41 psi, 280
kPa

Rear Original Tire:
P245/40RF19 94V

42 psi, 290
kPa

Rear Original Tire:
245/40RF19 94W

42 psi, 290
kPa

Rear Original Tire:
265/35RF19 94W

42 psi, 290
kPa

SDI1575

Example

TIRE LABELING

Federal law requires tire manufac-
turers to place standardized informa-
tion on the sidewall of all tires. This
information identifies and describes
the fundamental characteristics of
the tire and also provides the tire
identification number (TIN) for safety
standard certification. The TIN can be
used to identify the tire in case of a
recall.

Do-it-yourself

8-29

8-30

Do-it-yourself

SDI1606

Example

Tire size (example: P215/60R16

94H)
1. P: The “P” indicates the tire is

designed for passenger vehicles.
(Not all tires have this informa-
tion.)

2. Three-digit number (215): This

number gives the width in milli-
meters of the tire from sidewall
edge to sidewall edge.

3. Two-digit number (60): This num-

ber, known as the aspect ratio,
gives the tire’s ratio of height to

width.

4. R: The “R” stands for radial.

F: The “F” after “R” indicates Self-
Supporting type run-flat tire.

5. Two-digit number (16): This num-

ber is the wheel or rim diameter in
inches.

6. Two- or three-digit number (94):

This number is the tire’s load index.
It is a measurement of how much
weight each tire can support. You
may not find this information on all
tires because it is not required by
law.

7. H: Tire speed rating. You should

not drive the vehicle faster than
the tire speed rating.

JVM0694X

Example

TIN (Tire Identification Number) for

a new tire (example: DOT XX XX XXX
XXXX)
1. DOT: Abbreviation for the “De-

partment of Transportation”. The
symbol can be placed above, be-
low or to the left or right of the
Tire Identification Number.

2. Two-digit code: Manufacturer’s

identification mark

3. Two-digit code: Tire size
4. Three-digit code: Tire type code

(Optional)

5. Four numbers represent the week

and year the tire was built. For
example, the numbers 3103
means the 31st week of 2003. If
these numbers are missing, then
look on the other sidewall of the
tire.

Tire ply composition and material

The number of layers or plies of
rubber-coated fabric in the tire.
Tire manufacturers also must indicate
the materials in the tire, which include
steel, nylon, polyester, and others.

Maximum permissible inflation

pressure
This number is the greatest amount of
air pressure that should be put in the
tire. Do not exceed the maximum
permissible inflation pressure.

Maximum load rating

This number indicates the maximum
load in kilograms and pounds that can
be carried by the tire. When replacing
the tires on the vehicle, always use a
tire that has the same load rating as
the factory installed tire.

Term of “tubeless” or “tube type”

Indicates whether the tire requires an
inner tube (“tube type”) or not (“tube-
less”).

The word “radial”

The word “radial” is shown, if the tire
has radial structure.

Manufacturer or brand name

Manufacturer or brand name is
shown.

Other tire-related terminology:

In addition to the many terms that are
defined throughout this section, In-
tended Outboard Sidewall is (1) the
sidewall that contains a whitewall,
bears white lettering or bears manu-
facturer, brand and/or model name
molding that is higher or deeper than
the same molding on the other side-
wall of the tire, or (2) the outward
facing sidewall of an asymmetrical
tire that has a particular side that
must always face outward when
mounted on a vehicle.

TYPES OF TIRES

WARNING

.

When changing or replacing tires, be
sure all four tires are of the same type
(Example: Summer, All Season or
Snow) and construction. An INFINITI
retailer may be able to help you with
information about tire type, size,
speed rating and availability.

.

Replacement tires may have a lower
speed rating than the factory
equipped tires, and may not match
the potential maximum vehicle speed.
Never exceed the maximum speed
rating of the tire.

.

Replacing tires with those not origin-
ally specified by INFINITI could affect
the proper operation of the TPMS.

.

For additional information regarding
tires, refer to “Important Tire Safety
Information” (US) or “Tire Safety
Information” (Canada) in the War-
ranty Information Booklet.

All season tires

INFINITI specifies all season tires on some
models to provide good performance all

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8-31

8-32

Do-it-yourself

year, including snowy and icy road condi-
tions. All Season tires are identified by ALL
SEASON and/or M&S (Mud and Snow) on
the tire sidewall. Snow tires have better
snow traction than All Season tires and may
be more appropriate in some areas.

Summer tires

INFINITI specifies summer tires on some
models to provide superior performance on
dry roads. Summer tire performance is
substantially reduced in snow and ice. Sum-
mer tires do not have the tire traction rating
M&S on the tire sidewall.
If you plan to operate your vehicle in snowy
or icy conditions, INFINITI recommends the
use of SNOW tires or ALL SEASON tires on
all four wheels.

Snow tires

If snow tires are needed, it is necessary to
select tires equivalent in size and load rating
to the original equipment tires. If you do not,
it can adversely affect the safety and
handling of your vehicle.
Generally, snow tires will have lower speed
ratings than factory equipped tires and may
not match the potential maximum vehicle
speed. Never exceed the maximum speed
rating of the tire.
If you install snow tires, they must be the

same size, brand, construction and tread
pattern on all four wheels.
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.

Run-flat tires (if so equipped)

Your vehicle is equipped with run-flat tires.
You can continue driving to a safe location
even if they are punctured. Always use run-
flat tires of the specified size on all four
wheels. Mixing tire sizes or construction may
reduce vehicle handling stability. If neces-
sary, contact an INFINITI retailer for assis-
tance.
Frequently check the tire pressure and adjust
pressure of each tire properly. The tire
pressure can be also checked in the vehicle
information display.
It can be difficult to tell if a run-flat tire is
under-inflated or flat. Check the tire pres-
sures as described earlier in this section. If
the tire becomes under-inflated while driv-
ing, the low tire pressure warning light will
illuminate. If the tire becomes flat while
driving, the low tire pressure warning light

and the “Flat Tire - Visit dealer” warning will
appear.

Low tire pressure:

If the vehicle is being driven with low tire
pressure, the low tire pressure warning light
will illuminate.

Flat tire:

If the vehicle is being driven with one or more
flat tires, the low tire pressure warning light
will illuminate continuously and a chime will
sound for 10 seconds. A “Flat Tire - Visit
dealer” warning also appears in the vehicle
information display.
The chime will only sound at the first
indication of a flat tire and the warning light
will illuminate continuously. When the flat
tire warning is activated, have the system
reset and the tire checked, and replaced if
necessary. It is recommended you visit an
INFINITI retailer for these services. Even if
the tire is inflated to the specified COLD tire
pressure, the warning light will continue to
illuminate until the system is reset by an
INFINITI retailer.
If the low tire pressure warning light illumi-
nates continuously and the “Flat Tire - Visit
dealer” warning appears in the vehicle
information display:

.

Do not exceed 50 MPH (80 km/h).

.

Increase your following distance to allow

for increased stopping distances.

.

Avoid sudden maneuvers, hard cornering

and hard braking.

WARNING

.

Although you can continue driving
with a punctured run-flat tire, re-
member that vehicle handling stabi-
lity is reduced, which could lead to an
accident and personal injury. Also,
driving a long distance at high speeds
may damage the tire.

.

Do not drive at speeds above 50
MPH (80 km/h) and do not drive
more than approximately 93 miles
(150 km) with a punctured run-flat
tire. The actual distance the vehicle
can be driven on a flat tire depends on
outside temperature, vehicle load,
road conditions and other factors.

.

Drive safely at reduced speeds. Avoid
hard cornering or braking, which may
cause you to lose control of the
vehicle.

.

If you detect any unusual sounds or
vibrations while driving with a punc-
tured run-flat tire, pull off the road
to a safe location and stop the vehicle

as soon as possible. The tire may be
seriously damaged and need to be
replaced.

CAUTION

.

Never install tire chains on a punctu-
red run-flat tire, as this could damage
your vehicle.

.

Avoid driving over any projection or
pothole, as the clearance between
the vehicle and the ground is smaller
than normal.

.

Do not enter an automated car wash
with a punctured run-flat tire.

.

It is recommended you have the
punctured tire inspected by an
INFINITI retailer or other authorized
repair shop. Replace the tire as soon
as possible if the tire is seriously
damaged.

TIRE CHAINS

CAUTION

Tire chains/cables should not be in-
stalled on 265/35RF19 tires. Doing so
will cause damage to the vehicle. If you
plan to use tire chains/cables, you
should install 245/40RF19 tires on your
vehicle.

Use of tire chains may be prohibited accord-
ing to location. Check the local laws before
installing tire chains. When installing tire
chains, make sure they are the proper size
for the tires on your vehicle and are installed
according to the chain manufacturer’s sug-
gestions.

Use only SAE Class S chains.

Class

“S” chains are used on vehicles with re-
stricted tire to vehicle clearance. Vehicles
that can use Class “S” chains are designed to
meet the SAE standard minimum clearances
between the tire and the closest vehicle
suspension or body component required to
accommodate the use of a winter traction
device (tire chains or cables). The minimum
clearances are determined using the factory
equipped tire size. Other types may damage
your vehicle. Use chain tensioners when
recommended by the tire chain manufac-
turer to ensure a tight fit. Loose end links of

Do-it-yourself

8-33