Infiniti QX80 (2021 year). Manual in english — page 27

If the brakes do not operate properly, have
the brakes checked. It is recommended that
you visit an INFINITI retailer for this service.

SELF-ADJUSTING BRAKES

Your vehicle is equipped with self-adjusting
brakes.
The disc-type brakes self-adjust every time
the brake pedal is applied.

WARNING

Have your brake system checked if the
brake pedal height does not return to
normal. It is recommended you visit an
INFINITI retailer for this service.

BRAKE PAD WEAR WARNING

The disc brake pads have audible wear
warnings. When a brake pad requires repla-
cement, it will make a high pitched scraping
sound when the vehicle is in motion. This
scraping sound will first occur only when the
brake pedal is depressed. After more wear of
the brake pad, the sound will always be
heard even if the brake pedal is not
depressed. Have the brakes checked as soon
as possible if the wear warning sound is
heard.
Under some driving or climate conditions,

occasional brake squeak, squeal or other
noise may be heard. Occasional brake noise
during light to moderate stops is normal and
does not affect the function or performance
of the brake system.

Proper brake inspection intervals should be
followed.

For additional information, see the

maintenance schedules shown in the “9.
Maintenance and schedules” section.

BRAKE BOOSTER

Check the brake booster function as follows:
1. With the engine off, depress and release

the foot brake pedal more than 20 times.
When the foot brake pedal movement
(distance of travel) remains the same
from one pedal application to the next,
continue on to the next step.

2. While depressing the foot brake pedal,

start the engine.

3. With the foot brake pedal depressed,

stop the engine. Keep the pedal de-
pressed for about 30 seconds.

4. Run the engine for 1 minute without

depressing the foot brake pedal, then
turn it off. Depress the foot brake pedal
several times. The pedal travel distance
will decrease gradually with each de-
pression as the hydraulic pressure de-
creases.

If the brakes do not operate properly, have
the brakes checked. It is recommended that
you visit an INFINITI retailer for repair.

Do-it-yourself

8-17

BRAKES

8-18

Do-it-yourself

SDI2518

SDI2532

WAI0113X

ENGINE 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 pushed to

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

2. Open the engine hood and remove the

cover on the battery.

3. Remove the fuse/fusible link holder

cover

,

,

or

.

4. Remove the fuse with the fuse puller.

FUSES

SDI1753

Type A

SDI1754

Type B

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.

Do-it-yourself

8-19

8-20

Do-it-yourself

JVM0200X

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 pushed to

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.

SDI2704

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
on the vehicle information display. See
“Vehicle information display” (P.2-20).
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.

SDI2451

Replace the battery as follows:
1. Release the lock knob at the back of the

Intelligent Key and remove the mechan-
ical key.

2. Insert a small screwdriver into the slit of

the corner and twist it to separate the
upper part from the lower part. Use a

Do-it-yourself

8-21

INTELLIGENT KEY BATTERY
REPLACEMENT

8-22

Do-it-yourself

cloth to protect the casing.

3. Replace the battery with a new one.

Recommended battery: CR2025 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.

SDI2452

4. Align the tips of the upper and lower

parts

, and then push them together

until it is securely closed

.

5. Push the buttons two or three times to

check its operation.

It is recommended you visit an INFINITI
retailer if you need any assistance for
replacement.

FCC Notice:

For USA:

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.

Note: Changes or modifications not ex-
pressly approved by the party responsible
for compliance could void the user’s author-
ity to operate the equipment.

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.

JVM0854X

1.

Map light

2.

Front parking light/daytime running
light/front turn signal light

3.

Headlight (high-beam)

4.

Fog light

5.

Headlight (low-beam)

6.

Front side marker light

7.

Puddle light

8.

Step light (if so equipped)

9.

Side turn signal light

10. Front armrest light
11. Rear armrest light

12. Cargo light
13. High-mounted stop light
14. Side step light (if so equipped)
15. Rear personal light
16. Rear combination light (tail/stop/side

marker light)

17. Rear turn signal light
18. Back-up light
19. License plate light

Do-it-yourself

8-23

LIGHTS

8-24

Do-it-yourself

HEADLIGHTS

If replacement is required, it is recommended
you visit an INFINITI retailer for this service.

EXTERIOR AND INTERIOR LIGHTS

Item

Wattage (W)

Bulb No.

Headlight*

High beams

LED

—

Low beams

LED

—

Front turn signal light*

LED

—

Fog light*

LED

—

Front parking light*

LED

—

Front side marker light*

LED

—

Rear combination light*

tail

LED

—

back-up

LED

—

stop/tail

LED

—

side marker

LED

—

Rear turn signal light*

21

PY21W

License plate light*

5

W5W

Puddle light*

LED

—

Front and rear armrest light*

LED

—

Map light*

LED

—

Rear personal light

8

—

Cargo light

8

—

Vanity mirror light

2

—

Step light* (if so equipped)

5

—

Side step light* (if so equipped)

LED

—

High-mounted stop light*

LED

—

*:

It is recommended you visit an INFINITI retailer for replacement.

NOTE:

Always 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.

Do-it-yourself

8-25

8-26

Do-it-yourself

SDI1679

SDI2031

Rear personal light

SDI1729

Cargo light

SDI2032

Vanity mirror light

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

TIRE PRESSURE

Tire Pressure Monitoring System
(TPMS)

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.2-16), “Tire Pressure Mon-
itoring System (TPMS)” (P.5-5) and “Tire
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.5-7) 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. certifica-
tion label. The vehicle weight
capacity is indicated on the Tire
and Loading Information label.
Do not load your vehicle beyond
this capacity. Overloading your
vehicle may result in reduced
tire life, unsafe operating con-
ditions due to premature tire
failure, or unfavorable handling
characteristics and could also
lead to a serious accident.
Loading beyond the specified
capacity may also result in fail-
ure of other vehicle compo-
nents.

.

Before taking a long trip, or
whenever you heavily load your
vehicle, use a tire pressure

Do-it-yourself

8-27

WHEELS AND TIRES

8-28

Do-it-yourself

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.

SDI2496

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.10-15).

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.8-31).
Spare tire size or compact spare
tire size (if so equipped)

Do-it-yourself

8-29

8-30

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 ve-
hicle driving at high speeds, make
sure tires are rated to support high
speed operation, tires are in optimal
conditions and pressure is adjusted to
correct cold inflation pressure for
high speed operation.

.

Tires require adjustment to the infla-
tion 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 operation
has ended, readjust the tire pressure
to the recommended cold inflation
pressure. (See “Checking the tire
pressure” (P.8-30).)

Size

Cold Tire In-
flation Pres-

sure

Front Original Tire:
P275/50R22 111H

35 psi, 240
kPa

Front Original Tire:
P275/60R20 114H

35 psi, 240
kPa

Rear Original Tire:
P275/50R22 111H

35 psi, 240
kPa

Rear Original Tire:
P275/60R20 114H

35 psi, 240
kPa

Spare Tire:
275/60R20 115M

35 psi, 240
kPa

Spare Tire:
265/70R18 116M

51 psi, 350
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:
P275/50R22 111H

41 psi, 280
kPa

Front Original Tire:
P275/60R20 114H

36 psi, 250
kPa

Rear Original Tire:
P275/50R22 111H

41 psi, 280
kPa

Rear Original Tire:
P275/60R20 114H

36 psi, 250
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

8-31

8-32

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.
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: Date of Manu-

facture