Content .. 35 36 37 38 ..

LEXUS GX 460 (2019 year). Instruction - part 37

584

8-1. Specifications

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

Tire section names

2
3
4
5
6
7
8
9

585

This information has been prepared in accordance with regulations issued by the
National Highway Traffic Safety Administration of the U.S. Department of Trans-
portation.
It provides the purchasers and/or prospective 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 infor-

mation.

■

DOT quality grades
All passenger vehicle tires must conform 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 conditions 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 rep-
resent the tire’s ability to stop on wet pavement as measured under controlled
conditions on specified government 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 cornering (turning) traction.

Uniform Tire Quality Grading

586

8-1. Specifications

■

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 conditions 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 performance 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 excessive loading, either separately or in com-

bination, can cause heat buildup and possible tire failure.

587

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 pres-

sure

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 manu-

facturer

Accessory weight

The combined weight (in excess of those standard items

which may be replaced) of automatic transmission,

power steering, power brakes, power windows, 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 equipment,

including the maximum capacity of fuel, oil and coolant,

and if so equipped, air conditioning and additional

weight optional engine

Maximum loaded vehicle

weight

The sum of:

(a) Curb weight

(b) Accessory 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 follows

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 production

options weighing over 5 lb. (2.3 kg) in excess of the

standard items which they replace, not previously con-

sidered 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 assembly

upon which the tire beads are seated

588

8-1. Specifications

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 dis-

tributing 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 dis-

tributing 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

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 substantially 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 compounds

Cracking

Any parting within the tread, sidewall, or innerliner of

the tire extending to cord material

Tire related term

Meaning

589

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

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,

(b) The outward facing sidewall of an asymmetrical tire

that has a particular side that must always face out-

ward when mounted on a vehicle

Light truck (LT) tire

A tire designated by its manufacturer as primarily

intended for use on lightweight trucks or multipurpose

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 permissible

inflation pressure for that tire

Maximum permissible infla-

tion pressure

The maximum cold inflation pressure to which a tire may

be inflated

Measuring rim

The rim on which a tire is fitted for physical dimension

requirements

Open splice

Any parting at any junction of tread, sidewall, or inner-

liner that extends to cord material

Outer diameter

The overall diameter of an inflated new tire

Tire related term

Meaning

590

8-1. Specifications

Overall width

The linear distance between the exteriors of the side-

walls of an inflated tire, including elevations due to label-

ing, decorations, or protective bands or ribs

Passenger car tire

A tire intended for use on passenger cars, multipurpose

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

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 side-

walls 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 Ref-

erence 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-Covered Surfaces, and which is marked
with an Alpine Symbol (

) on at least one sidewall

Tire related term

Meaning

591

: Table 1

 Occupant loading and distribution for vehicle normal load for various des-

ignated seating capacities

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

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

592

8-2. Customization

Customizable features

■

Changing by using the menu switch and the “ENTER” switch
When customizing vehicle features, ensure that the vehicle is parked in a safe
place with the shift lever in P and the parking brake set.

Press and hold the menu switch to display customization mode. (

P. 91)

Press the “ENTER” switch upwards or downwards to select the item to be
customized.
Press the “ENTER” switch to confirm.

Press the “ENTER” switch upwards or downwards to select the desired set-
ting for the item being customized.
Press the “ENTER” switch to confirm.

When customization is completed, press the menu switch to clear the cus-
tomization screen.

■

Changing by using the multimedia system or navigation system

Press the “SETUP” button on the multimedia system or navigation system.
Select “Vehicle” on the “Setup” screen and select “Vehicle Customization”.

Various setting can be changed. Refer to the list of settings that can be
changed for details.

Your vehicle includes a variety of electronic features that can be personalized
to suit your preferences. The settings of these features can be changed by
using the steering wheel switches, the multimedia system or navigation sys-
tem or at your Lexus dealer.
It is also possible to customize certain vehicle features yourself using the
menu switch and the “ENTER” switch.

Customizing vehicle features

593

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

Settings that can be changed using the menu switch and the “ENTER” switch
Settings that can be changed using the multimedia system or navigation sys-
tem
Settings that can be changed by your Lexus dealer

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

■

Multi-information display (

P. 90)

: The default setting varies according to countries.

Customizable features

Function

Default setting

Customized

setting

Language

English

French

Spanish

Units

miles (MPG US)

km (km/L)

—

km (L/100km)

Eco Driving Indicator Light

Off

—

594

8-2. Customization

■

Door lock (

P. 102, 109, 5 56)

Function

Default setting

Customized

setting

Unlocking using a

mechanical key

Driver’s door

unlocked in one

step, all doors

unlocked in two

steps

All doors

unlocked in one

step

—

Speed linked door locking

function

Off

—

Shift position linked door

locking function

Off

—

Shift position linked door

unlocking function

Off

—

Driver’s door linked door

unlocking function

Off

—

595

■

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



P. 102, 109)

Function

Default setting

Customized

setting

Operation buzzer volume

Level 7

Off

—

Level 1 to 6

Operation signal (buzzer)

Off

—

Operation signal

(emergency flashers)

Off

—

Time elapsed before the

automatic door lock

function is activated if a

door is not opened after

being unlocked

60 seconds

Off

—

30 seconds

120 seconds

Open door warning buzzer

(when locking the vehicle)

Off

—

596

8-2. Customization

■

Smart access system with push-button start (



P. 102 , 109, 119)

■

Wireless remote control (



P. 98, 102)

Function

Default setting

Customized

setting

Smart door unlocking

Driver’s door

All the doors

—

Smart access system with

push-button start

Off

—

Number of consecutive

door lock operations

2 times

As many as

desired

—

Function

Default setting

Customized

setting

Wireless remote control

Off

—

Unlocking operation

Driver’s door

unlocked in one

step, all doors

unlocked in two

steps

All doors

unlocked in one

step

—

Panic function

Off

—

Glass hatch opening

operation

Push and hold

(Short)

Push twice

—

One short push

Push and hold

(Long)

Off

597

■

Automatic light control system (



P. 206)

: If equipped

Function

Default setting

Customized

setting

Time elapsed before the

headlights turn off

30 seconds

Off

—

60 seconds

90 seconds

Light sensor sensitivity

Standard

-2 to 2

—

Daytime running light sys-

tem (except for Canada)

Off

—

Automatic High Beam

Off

—

Welcome lighting illumina-

tion control

Off

—

598

8-2. Customization

■

Interior lights (



P. 406)

Function

Default setting

Customized

setting

Time elapsed before the

interior lights turn off

15 seconds

Off

—

7.5 seconds

30 seconds

Operation after the engine
switch is turned to OFF

Off

—

Operation when the doors

are unlocked with the smart

access system with push-

button start or wireless

remote control

Off

—

Operation when you

approach the vehicle with

the electronic key on your

person

Off

—

Shift lever light

Off

—

Footwell lighting

Off

—

Lounge illumination control

Off

—

599

■

Exterior lights (



P. 406)

Function

Default setting

Customized

setting

Time elapsed before the

exterior lights turn off

15 seconds

Off

—

7.5 seconds

30 seconds

Operation when the doors

are unlocked with the smart

access system with push-

button start or wireless

remote control

Off

—

Operation when you

approach the vehicle with

the electronic key on your

person

Off

—

Running board lights

Off

—

Operation when the door is

opened

Off

—

Content .. 35 36 37 38 ..