LEXUS RC300, RC350 (2019 year). Instruction

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

Full-size tire

Tire size (

P.331)

DOT and Tire Identification Number (TIN) (

P.330)

Location of treadwear indicators (

P.255)

Tire ply composition and materials

Plies are layers of rubber-coated parallel cords. Cords are the strands which form the plies
in a tire.

Radial tires or bias-ply tires

A radial tire has “RADIAL” on the sidewall. A tire not marked “RADIAL” is a bias-ply tire.

TUBELESS or TUBE TYPE

A tubeless tire does not have a tube and air is directly put into the tire. A tube type tire has a
tube inside the tire and the tube maintains the air pressure.

Load limit at maximum cold tire inflation pressure (

P.333)

Maximum cold tire inflation pressure (

P.333)

This means the pressure to which a tire may be inflated.

Uniform tire quality grading

For details, see “Uniform Tire Quality Grading” that follows.

Summer tires or all season tires (

P.256)

An all season tire has “M+S” on the sidewall. A tire not marked “M+S” is a summer tire.

Tire information

Typical tire symbols

A
B
C
D

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

Compact spare tire

Tire size (

P.331)

DOT and Tire Identification Number (TIN) (

P.330)

Location of treadwear indicators (

P.255)

Tire ply composition and materials

Plies are layers of rubber-coated parallel cords. Cords are the strands which form the plies
in a tire.

TUBELESS or TUBE TYPE

A tubeless tire does not have a tube and air is directly put into the tire. A tube type tire has a
tube inside the tire and the tube maintains the air pressure.

Load limit at maximum cold tire inflation pressure (

P.333)

Maximum cold tire inflation pressure (

P.333)

This means the pressure to which a tire may be inflated.

“TEMPORARY USE ONLY”

A compact spare tire is identified by the phrase “TEMPORARY USE ONLY” molded on its
sidewall. This tire is designed for temporary emergency use only.



Type A

A
B
C
D

Typical DOT and Tire Identifica-
tion Number (TIN)

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DOT symbol

Tire Identification Number (TIN)
Tire manufacturer’s identification
mark
Tire size code
Manufacturer’s optional tire type
code (3 or 4 letters)
Manufacturing week
Manufacturing year

: The DOT symbol certifies that the tire

conforms to applicable Federal Motor
Vehicle Safety Standards.



Type B

DOT symbol

Tire Identification Number (TIN)
Tire manufacturer’s identification
mark
Manufacturing week
Manufacturing year
Manufacturer’s code

: The DOT symbol certifies that the tire

conforms to applicable Federal Motor
Vehicle Safety Standards.

■

Typical tire size information

The illustration indicates typical tire
size.

Tire use (P = Passenger car, T =
Temporary use)
Section width (millimeters)
Aspect ratio (tire height to section
width)
Tire construction code (R = Radial,
D = Diagonal)
Wheel diameter (inches)
Load index (2 digits or 3 digits)
Speed symbol (alphabet with one
letter)

■

Tire dimensions

Section width
Tire height

A
B
C

E
F

Tire size

B
C

E
F

A
B

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Wheel diameter

Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer

This information has been prepared in
accordance with regulations issued by
the National Highway Traffic Safety
Administration of the U.S. Department
of Transportation.
It provides the purchasers and/or pro-
spective purchasers of Lexus vehicles
with information on uniform tire quality
grading.

Your Lexus dealer will help answer any

questions you may have as you read this
information.

■

DOT quality grades

All passenger vehicle tires must con-
form to Federal Safety Requirements in
addition to these grades. Quality
grades can be found where applicable
on the tire sidewall between tread
shoulder and maximum section width.

For example: Treadwear 200 Traction AA
Temperature A

■

Treadwear

The treadwear grade is a comparative
rating based on the wear rate of the tire
when tested under controlled condi-
tions on a specified government test
course.

For example, a tire graded 150 would wear
one and a half (1 - 1/2) times as well on the
government course as a tire graded 100.
The relative performance of tires depends
upon the actual conditions of their use.
Performance may differ significantly from
the norm due to variations in driving habits,
service practices and differences in road
characteristics and climate.

■

Traction AA, A, B, C

The traction grades, from highest to
lowest, are AA, A, B and C, and they
represent the tire’s ability to stop on
wet pavement as measured under con-
trolled conditions on specified govern-
ment test surfaces of asphalt and
concrete.

A tire marked C may have poor traction
performance.
Warning: The traction grade assigned to
this tire is based on braking (straight
ahead) traction tests and does not include

Tire section names

Uniform Tire Quality Grading

A
B
C
D

E
F

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cornering (turning) traction.

■

Temperature A, B, C

The temperature grades are A (the
highest), B, and C, representing the
tire’s resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled condi-
tions on a specified indoor laboratory
test wheel.

Sustained high temperature can cause the
material of the tire to degenerate and
reduce tire life, and excessive temperature
can lead to sudden tire failure.

Grade C corresponds to a level of perfor-
mance which all passenger car tires must
meet under the Federal Motor Vehicle
Safety Standard No. 109.
Grades B and A represent higher levels of
performance on the laboratory test wheel
than the minimum required by law.
Warning: The temperature grades of a tire
assume that it is properly inflated and not
overloaded.
Excessive speed, underinflation, or exces-
sive loading, either separately or in combi-
nation, can cause heat buildup and
possible tire failure.

Glossary of tire terminology

Tire related term

Meaning

Cold tire inflation pressure

Tire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition

Maximum inflation pressure

The maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire

Recommended inflation pressure

Cold tire inflation pressure recommended by a
manufacturer

Accessory weight

The combined weight (in excess of those standard
items which may be replaced) of automatic trans-
mission, power steering, power brakes, power win-
dows, power seats, radio and heater, to the extent
that these items are available as factory-installed
equipment (whether installed or not)

Curb weight

The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil
and coolant, and if so equipped, air conditioning
and additional weight optional engine

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Maximum loaded vehicle weight

The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight

Normal occupant weight

150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1

that fol-

lows

Occupant distribution

Distribution of occupants in a vehicle as specified in
the third column of Table 1

below

Production options weight

The combined weight of installed regular produc-
tion options weighing over 5 lb. (2.3 kg) in excess of
the standard items which they replace, not previ-
ously considered in curb weight or accessory
weight, including heavy duty brakes, ride levelers,
roof rack, heavy duty battery, and special trim

Rim

A metal support for a tire or a tire and tube assem-
bly upon which the tire beads are seated

Rim diameter (Wheel diameter)

Nominal diameter of the bead seat

Rim size designation

Rim diameter and width

Rim type designation

The industry manufacturer’s designation for a rim
by style or code

Rim width

Nominal distance between rim flanges

Vehicle capacity weight (Total load
capacity)

The rated cargo and luggage load plus 150 lb. (68
kg) times the vehicle’s designated seating capacity

Vehicle maximum load on the tire

The load on an individual tire that is determined by
distributing to each axle its share of the maximum
loaded vehicle weight, and dividing by two

Vehicle normal load on the tire

The load on an individual tire that is determined by
distributing to each axle its share of curb weight,
accessory weight, and normal occupant weight
(distributed in accordance with Table 1

below), and

dividing by two

Weather side

The surface area of the rim not covered by the
inflated tire

Tire related term

Meaning

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Bead

The part of the tire that is made of steel wires,
wrapped or reinforced by ply cords and that is
shaped to fit the rim

Bead separation

A breakdown of the bond between components in
the bead

Bias ply tire

A pneumatic tire in which the ply cords that extend
to the beads are laid at alternate angles substan-
tially less than 90 degrees to the centerline of the
tread

Carcass

The tire structure, except tread and sidewall rubber
which, when inflated, bears the load

Chunking

The breaking away of pieces of the tread or sidewall

Cord

The strands forming the plies in the tire

Cord separation

The parting of cords from adjacent rubber com-
pounds

Cracking

Any parting within the tread, sidewall, or innerliner
of the tire extending to cord material

A pneumatic tire with an inverted flange tire and rim
system in which the rim is designed with rim flanges
pointed radially inward and the tire is designed to fit
on the underside of the rim in a manner that
encloses the rim flanges inside the air cavity of the
tire

Extra load tire

A tire designed to operate at higher loads and at
higher inflation pressures than the corresponding
standard tire

Groove

The space between two adjacent tread ribs

Innerliner

The layer(s) forming the inside surface of a tubeless
tire that contains the inflating medium within the tire

Innerliner separation

The parting of the innerliner from cord material in
the carcass

Tire related term

Meaning

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Intended outboard sidewall

(a) The sidewall that contains a whitewall, bears
white lettering, or bears manufacturer, brand,
and/or model name molding that is higher or
deeper than the same molding on the other sidewall
of the tire, or
(b) The outward facing sidewall of an asymmetrical
tire that has a particular side that must always face
outward when mounted on a vehicle

Light truck (LT) tire

A tire designated by its manufacturer as primarily
intended for use on lightweight trucks or multipur-
pose passenger vehicles

Load rating

The maximum load that a tire is rated to carry for a
given inflation pressure

Maximum load rating

The load rating for a tire at the maximum permissi-
ble inflation pressure for that tire

Maximum permissible inflation pres-
sure

The maximum cold inflation pressure to which a tire
may be inflated

Measuring rim

The rim on which a tire is fitted for physical dimen-
sion requirements

Open splice

Any parting at any junction of tread, sidewall, or
innerliner that extends to cord material

Outer diameter

The overall diameter of an inflated new tire

Overall width

The linear distance between the exteriors of the
sidewalls of an inflated tire, including elevations due
to labeling, decorations, or protective bands or ribs

Passenger car tire

A tire intended for use on passenger cars, multipur-
pose passenger vehicles, and trucks, that have a
gross vehicle weight rating (GVWR) of 10,000 lb.
or less.

Ply

A layer of rubber-coated parallel cords

Ply separation

A parting of rubber compound between adjacent
plies

Pneumatic tire

A mechanical device made of rubber, chemicals,
fabric and steel or other materials, that, when
mounted on an automotive wheel, provides the
traction and contains the gas or fluid that sustains
the load

Tire related term

Meaning

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: Table 1 - Occupant loading and distribution for vehicle normal load for various desig-

nated seating capacities

Radial ply tire

A pneumatic tire in which the ply cords that extend
to the beads are laid at substantially 90 degrees to
the centerline of the tread

Reinforced tire

A tire designed to operate at higher loads and at
higher inflation pressures than the corresponding
standard tire

Section width

The linear distance between the exteriors of the
sidewalls of an inflated tire, excluding elevations
due to labeling, decoration, or protective bands

Sidewall

That portion of a tire between the tread and bead

Sidewall separation

The parting of the rubber compound from the cord
material in the sidewall

Snow tire

A tire that attains a traction index equal to or
greater than 110, compared to the ASTM E-1136
Standard Reference Test Tire, when using the snow
traction test as described in ASTM F-1805-00,
Standard Test Method for Single Wheel Driving
Traction in a Straight Line on Snow-and Ice-Cov-
ered Surfaces, and which is marked with an Alpine

Symbol (

) on at least one sidewall

Test rim

The rim on which a tire is fitted for testing, and may
be any rim listed as appropriate for use with that tire

Tread

That portion of a tire that comes into contact with
the road

Tread rib

A tread section running circumferentially around a
tire

Tread separation

Pulling away of the tread from the tire carcass

Treadwear indicators (TWI)

The projections within the principal grooves
designed to give a visual indication of the degrees
of wear of the tread

Wheel-holding fixture

The fixture used to hold the wheel and tire assembly
securely during testing

Tire related term

Meaning

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Designated seating capac-

ity, Number of occupants

Vehicle normal load, Num-

ber of occupants

Occupant distribution in a

normally loaded vehicle

2 through 4

2 in front

5 through 10

2 in front, 1 in second seat

11 through 15

2 in front, 1 in second seat, 1 in

third seat, 1 in fourth seat

16 through 20

2 in front, 2 in second seat, 2

in third seat, 1 in fourth seat

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8-2.Customization

■

Changing by using the meter con-
trol switches

Press

to select

Operate the switches to select a
desired item.

Change the setting by referring to
the message displayed on the
screen.

■

Changing by using the Remote
Touch

Press the “MENU” button on the
Remote Touch.

Select “Setup” on the menu screen
and select “Vehicle”.

Select “Vehicle Customization”,
“LEXUS Park Assist” or “Drive
Mode Customization”.

Various setting can be changed. Refer
to the list of settings that can be
changed for details.
For details on the Remote Touch, refer
to the “NAVIGATION AND MULTI-
MEDIA SYSTEM OWNER’S MAN-
UAL”.

■

When customizing using the Remote

Touch

Stop the vehicle in a safe place, apply the

parking brake, and shift the shift lever to P.

Also, to prevent battery discharge, leave

the engine running while customizing the

features.

Some function settings are changed simultaneously with other functions being cus-
tomized. Contact your Lexus dealer for further details.

Settings that can be changed using the Remote Touch
Settings that can be changed using the meter control switches
Settings that can be changed by your Lexus dealer

Customizable features

Your vehicle includes a variety of
electronic features that can be per-
sonalized to your preferences. The
settings of these features can be
changed by using the meter control
switches, the Remote Touch or at
your Lexus dealer.

Customizing vehicle features

WARNING

■

During customization

As the engine needs to be running

during customization, ensure that the

vehicle is parked in a place with ade-

quate ventilation. In a closed area such as

a garage, exhaust gases including harm-

ful carbon monoxide (CO) may collect

and enter the vehicle. This may lead to

death or a serious health hazard.

NOTICE

■

During customization

To prevent battery discharge, ensure that

the engine is running while customizing

features.

Customizable features

A
B
C

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8-2. Customization

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Definition of symbols: O = Available, — = Not available

■

Gauges, meters and multi-information display (

P.62, 66, 71)

Function

Default setting

Customized setting

Language

English

French

—

Spanish

Units

miles (MPG US)

km (km/L)

—

km (L/100 km)

miles (MPG Impe-

rial)

Switch settings

Drive information 1

Desired status

screen

—

Drive information 1

Current fuel con-

sumption

Customizable items:

P.72

—

Average fuel econ-

omy (after reset)

Drive information 2

Distance (driving

range)

Average vehicle

speed (after reset)

Drive information 3

Average fuel con-

sumption (after

refuel)

Elapsed time (after

start)

Pop-up display

Off

—

Accent color

Color 1

Color 2

—

Needle

Color 1

Color 2

—

Color 3

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: For details about each function:

P.76

: The default setting varies according to country.

: Except F SPORT models

: Some status screens cannot be registered (indicated on the multi-information display)

: F SPORT models

: Always observe the legal speed limit when driving on public roads.

: On multi-information display

■

Door lock (

P.86, 89, 304)

Rev indicator

5000 r/min.

Select to set the

desired engine

speed at which the

Rev indicator will

begin to be dis-

played.

—

Off

Rev peak

Off

—

Speed indicator

Off

—

Speed indicator settings

75 mph (120 km/h)

30 mph to 100 mph

(50 km/h to

160km/h)

—

Eco Driving Indicator Light

Off

—

Clock

12-hour display

24-hour display

—

Function

Default setting

Customized setting

Function

Default setting

Customized setting

Unlocking using a mechani-
cal key

Driver’s door

unlocked in one

step, both side doors

unlocked in two

steps

Both side doors

unlocked in one step

—

Automatic door lock

Shifting the shift

lever to position

other than P

Off

—

Vehicle speed is

approximately 12

mph (20 km/h) or

higher

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■

Smart access system with push-button start and wireless remote control
(

P.86, 89)

■

Smart access system with push-button start (

P.86, 89, 93)

Automatic door unlock

Shifting the shift

lever to P

Off

—

Driver’s door is

opened

Locking/unlocking of the
trunk when both side doors
are locked/unlocked

Off

—

Function

Default setting

Customized setting

Function

Default setting

Customized setting

Operation buzzer volume

Off

—

1 to 7

Operation signal (Emer-
gency flashers)

Off

—

Time elapsed before auto-
matic door lock function is
activated if door is not
opened after being unlocked

60 seconds

Off

—

30 seconds

120 seconds

Open door warning buzzer

Off

—

Welcome light illumination
control

Off

—

Function

Default setting

Customized setting

Smart access system with
push-button start

Off

—

Smart door unlocking

Driver’s door

Both side doors

—

Number of consecutive door
lock operations

2 times

As many as desired

—

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Wireless remote control (

P.82, 86, 89)

■

Driving position memory

(

P.100)

: If equipped

■

Power easy access system (

P.100)

: If equipped

Function

Default setting

Customized setting

Wireless remote control

Off

—

Unlocking operation

Driver’s door

unlocked in one

step, both side doors

unlocked in two

steps

Both side doors

unlocked in one step

—

Trunk unlocking operation

Press and hold

(short)

One short press

—

Push twice

Press and hold

(long)

Off

Alarm (panic mode)

Off

—

Function

Default setting

Customized setting

Selecting the door linking
driving position memory with
door unlock operation

Driver’s door

Both side doors

—

Function

Default setting

Customized setting

Driver’s seat movement when
exiting the vehicle

Full

Off

—

Partial

Steering wheel movement

Off

—

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■

Power windows (

P.110)

■

Moon roof

(

P.112)

: If equipped

■

Turn signal lever (

P.133)

: After flashing the turn signal lights when turning left or right while this function is off and

the turn signal lever is moved to the first position in the direction of the flashing light, the
turn signal lights can be selected to be flashing or off.

: The turn signal lights keep flashing if the turn signal lever is moved to the first position in

the direction of flashing light.

: The turn signal lights will be off if the turn signal lever is moved to the first position in the

direction of flashing light.

Function

Default setting

Customized setting

Mechanical key linked opera-
tion

Off

—

Wireless remote control
linked operation

Off

On (Open only)

—

Wireless remote control
linked operation signal
(buzzer)

Off

—

Function

Default setting

Customized setting

Mechanical key linked opera-
tion

Off

—

Wireless remote control
linked operation

Off

On (Open only)

—

Wireless remote control
linked operation signal
(buzzer)

Off

—

Function

Default setting

Customized setting

The number of times the turn
signal lights flash automati-
cally when the turn signal
lever is moved to the first
position during a lane
change

—

Off

LEXUS RC300, RC350 (2019 year). Instruction - part 21