Lexus GX460 (2022 year). Manual in english - page 30

■

When to replace your vehicle’s tires

Tires should be replaced if:

●

The treadwear indicators are showing on a tire.

●

You have tire damage such as cuts, splits, cracks deep enough to expose the fabric, and

bulges indicating internal damage

●

A tire goes flat repeatedly or cannot be properly repaired due to the size or location of

a cut or other damage

If you are not sure, consult with your Lexus dealer.

■

Replacing tires and wheels

If the ID code of the tire pressure warning valve and transmitter is not registered, the tire

pressure warning system will not work properly. After driving for about 20 minutes, the

tire pressure warning light blinks for 1 minute and stays on to indicate a system malfunc-

tion.

■

Tire life

Any tire over 6 years old must be checked by a qualified technician even if it has seldom

or never been used or damage is not obvious.

■

Routine tire inflation pressure checks

The tire pressure warning system does not replace routine tire inflation pressure checks.

Make sure to check tire inflation pressure as part of your routine of daily vehicle checks.

■

Maximum load of tire

Check that the number given by dividing the maximum load by 1.10 of the replacement

tire is greater than 1/2 of the Gross Axle Weight Ratings (GAWR) of either the front axle

or the rear axle, whichever is greater.
For the GAWR, see the Certification Label. For

the maximum load of the tire, see the load limit

at maximum cold tire inflation pressure men-

tioned on the sidewall of the tire. (



P. 589)

493

Main

■

Tire types

●

Summer tires
Summer tires are high-speed performance tires best suited to highway driving under

dry conditions. Since summer tires do not have the same traction performance as

snow tires, summer tires are inadequate for driving on snow-covered or icy roads. For

driving on snow-covered roads or icy roads, the use of snow tires is recommended.

When installing snow tires, be sure to replace all four tires.

●

All season tires
All season tires are designed to provide better traction in snow and to be adequate for

driving in most winter conditions as well as for use year-round. All season tires, how-

ever, do not have adequate traction performance compared with snow tires in heavy

or loose snow. Also, all season tires fall short in acceleration and handling perfor-

mance compared with summer tires in highway driving.

●

Snow tires
For driving on snow-covered roads or icy roads, we recommend using snow tires. If

you need snow tires, select tires of the same size, construction and load capacity as the

originally installed tires. Since your vehicle has radial tires as original equipment, make

sure your snow tires also have radial construction. Do not install studded tires without

first checking local regulations for possible restrictions. Snow tires should be installed

on all wheels. (



P. 387)

494

■

If the tread on snow tires wears down below 0.16 in. (4 mm)

The effectiveness of the tires as snow tires is lost.

■

Situations in which the tire pressure warning system may not operate properly

●

In the following cases, the tire pressure warning system may not operate properly.
• If non-genuine Lexus wheels are used.

• A tire has been replaced with a tire that is not an OE (Original Equipment) tire.

• A tire has been replaced with a tire that is not of the specified size.

• Tire chains etc. are equipped.

• An auxiliary-supported run-flat tire is equipped.

• If a window tint that affects the radio wave signals is installed.

• If there is a lot of snow or ice on the vehicle, particularly around the wheels or wheel

housings.

• If the tire inflation pressure is extremely higher than the specified level.

• If the spare tire is in a location subject to poor radio wave signal reception.

• If a large metallic object which can interfere with signal reception is put near the

spare tire.

• If tires not equipped with the tire pressure warning valves and transmitters are used.

• If the ID code on the tire pressure warning valves and transmitters is not registered

in the tire pressure warning computer.

●

Performance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio station, large display, air-

port or other facility that generates strong radio waves or electrical noise

• When carrying a portable radio, cellular phone, cordless phone or other wireless

communication device

If tire position information is not correctly displayed due to the radio wave conditions,

the display may be corrected by driving and changing the radio wave conditions.

●

When the vehicle is parked, the time taken for the warning to start or go off could be

extended.

●

When tire inflation pressure declines rapidly for example when a tire has burst, the

warning may not function.

495

Main

■

The initialization operation

●

Make sure to carry out initialization after adjusting the tire inflation pressure.

Also, make sure the tires are cold before carrying out initialization or tire inflation pres-

sure adjustment.

●

If you have accidentally turned the engine switch off during initialization, it is not neces-

sary to manually restart the initialization again, as initialization will restart automatically

the next time the engine switch is turned to IGNITION ON mode.

●

If you accidentally perform initialization when initialization is not necessary, adjust the

tire inflation pressure to the specified level when the tires are cold, and conduct initial-

ization again.

●

While the position of each tire is being determined and the inflation pressures are not

being displayed on the multi-information display, if the inflation pressure of a tire drops,

the tire pressure warning light will come on.

■

Warning performance of the tire pressure warning system

The warning of the tire pressure warning system will change in accordance with the con-

ditions under which it was initialized. For this reason, the system may give a warning even

if the tire pressure does not reach a low enough level, or if the pressure is higher than the

pressure that was adjusted to when the system was initialized.

■

When initialization of the tire pressure warning system has failed

●

Do not move the vehicle backward during initialization. Initialization is started again

from the beginning and it may take longer than usual.

●

Initialization may take longer to complete if the vehicle is driven on an unpaved road.

When performing initialization, drive on a paved road if possible. Depending on the

driving environment and condition of the tires, initialization will be completed in

approximately 10 to 30 minutes.
• If initialization is not complete after driving approximately 30 minutes, continue

driving for a while.

• If initialization is not complete after driving approximately 1 hour, park the vehicle in

a safe place for approximately 20 minutes. Then drive straight (with occasional left

and right turns) at approximately 25 mph (40 km/h) or more

for approximately 10

to 30 minutes.

If initialization is still not complete, have the vehicle inspected by your Lexus dealer.

: Except when making a left/right turn

●

In the following situations, the tire inflation pressure will not be recorded and the system

will not operate properly. Perform initialization again.
• If, when attempting to start initialization, the tire pressure warning light does not

blink 3 times.

• If, when the vehicle has been driven for about 20 minutes after performing initializa-

tion, the tire pressure warning light blinks for approximately 1 minute and then illumi-

nates.

496

■

When registering ID codes

●

ID code registration is performed while driving at a vehicle speed of approximately 25

mph (40 km/h) or more.

●

Before performing ID code registration, make sure that no wheels with tire pressure

warning valve and transmitters installed are near the vehicle.

●

Initialize the tire pressure warning system after ID code registration. Initialization is dis-

abled if the system was initialized before registration.

●

After ID code registration, the tires are hot by driving. Initialize the tire pressure warn-

ing system after the tires become cold.

●

ID codes can be registered by yourself, but depending on the driving conditions and

driving environment, registration may take some time to complete.

■

Canceling the change wheel set mode

●

If turning the engine switch off when in the change wheel set mode before driving, the

change wheel set mode is canceled.

●

After driving when in the change wheel set mode, the change wheel set mode cannot

be canceled. To cancel the mode, perform the procedure for ID code registration again

and turn the engine switch off before driving.

●

If the change wheel set mode is canceled, the ID codes that have already been regis-

tered are communicated. When communication is finished, the tire pressure warning

light will turn off.

■

When ID code registration has failed

●

Registration may take long time or the ID codes may not be registered in the following

situations.
• When the vehicle is moved backward during registration.

Registration is started again from the beginning and it may take longer than usual.

• When another vehicle is running the side of the vehicle such as in heavy traffic.

It may take longer to detect the vehicle’s tire pressure warning valves and transmit-

ters.

• If tire pressure warning valves and transmitters are in the vehicle.

The ID codes may not be registered.

●

When performing registration, drive on a paved road if possible. Depending on the

driving environment and condition of the tires, registration will be completed in approx-

imately 10 to 30 minutes.
• If registration is not complete after driving approximately 30 minutes, continue driv-

ing for a while.

• If registration is not complete after driving approximately 1 hour, park the vehicle in a

safe place for approximately 20 minutes. Then drive straight (with occasional left

and right turns) at approximately 25 mph (40 km/h) or more

for approximately 10

to 30 minutes.

If registration is still not complete, have the vehicle inspected by your Lexus dealer.

: Except when making a left/right turn

●

When the tire pressure warning light does not blink slowly 3 times, the ID code will not

be registered and the system will not operate properly. Perform registration again.

497

Main

WARNING

■

Tire pressure warning system operation

The tire pressure warning system may not provide warning immediately if a tire bursts

or if sudden air leakage occurs.

■

When inspecting or replacing tires

Observe the following precautions to prevent accidents. Failure to do so may cause

damage to parts of the drive train as well as dangerous handling characteristics, which

may lead to an accident resulting in death or serious injury.

●

Do not mix tires of different makes, models or tread patterns.

Also, do not mix tires of remarkably different treadwear.

●

Do not use tire sizes other than those recommended by Lexus.

●

Do not mix differently constructed tires (radial, bias-belted or bias-ply tires).

●

Do not mix summer, all season and snow tires.

●

Do not use tires that have been used on another vehicle.

Do not use tires if you do not know how they were used previously.

■

When initializing the tire pressure warning system

Do not initialize tire inflation pressure without first adjusting the tire inflation pressure to

the specified level. Otherwise, the tire pressure warning light may not come on even if

the tire inflation pressure is low, or it may come on when the tire inflation pressure is

actually normal.

498

NOTICE

■

Repairing or replacing tires, wheels, tire pressure warning valves, transmitters and

tire valve caps

●

When removing or fitting the wheels, tires or the tire pressure warning valves and

transmitters, contact your Lexus dealer as the tire pressure warning valves and trans-

mitters may be damaged if not handled correctly.

●

Make sure to install the tire valve caps. If the tire valve caps are not installed, water

could enter the tire pressure warning valves and the tire pressure warning valves

could be bound.

●

When replacing tire valve caps, do not use tire valve caps other than those specified.

The cap may become stuck.

■

To avoid damage to the tire pressure warning valves and transmitters

When a tire is repaired with liquid sealants, the tire pressure warning valve and trans-

mitter may not operate properly. If a liquid sealant is used, contact your Lexus dealer or

other qualified service shop as soon as possible. Make sure to replace the tire pressure

warning valve and transmitter when replacing the tire. (



P. 489)

■

Driving on rough roads

Take particular care when driving on roads with loose surfaces or potholes.

These conditions may cause losses in tire inflation pressure, reducing the cushioning

ability of the tires. In addition, driving on rough roads may cause damage to the tires

themselves, as well as the vehicle’s wheels and body.

■

If tire inflation pressure of each tire becomes low while driving

Do not continue driving, or your tires and/or wheels may be ruined.

499

Main

Tire inflation pressure

The recommended cold tire inflation
pressure and tire size are displayed on
the tire and loading information label.
(



P. 584)

Tire inflation pressure

500

Tire valve
Tire pressure gauge

Remove the tire valve cap.
Press the tip of the tire pressure gauge onto the tire valve.
Read the pressure using the gauge gradations.
If the tire inflation pressure is not at the recommended level, adjust the pres-
sure.
If you add too much air, press the center of the valve to deflate.
After completing the tire inflation pressure measurement and adjustment,
apply soapy water to the valve and check for leakage.
Put the tire valve cap back on.

Inspection and adjustment procedure

2
3
4

501

Main

■

Tire inflation pressure check interval

You should check tire inflation pressure every two weeks, or at least once a month. Do

not forget to check the spare.

■

Effects of incorrect tire inflation pressure

Driving with incorrect tire inflation pressure may result in the following:

●

Reduced fuel economy

●

Reduced driving comfort and poor handling

●

Reduced tire life due to wear

●

Reduced safety

●

Damage to the drive train

If a tire needs frequent inflating, have it checked by your Lexus dealer.

■

Instructions for checking tire inflation pressure

When checking tire inflation pressure, observe the following:

●

Check only when the tires are cold.

If your vehicle has been parked for at least 3 hours and has not been driven for more

than 1 mile or 1.5 km, you will get an accurate cold tire inflation pressure reading.

●

Always use a tire pressure gauge.

It is difficult to judge if a tire is properly inflated based only on its appearance.

●

It is normal for the tire inflation pressure to be higher after driving as heat is generated

in the tire. Do not reduce tire inflation pressure after driving.

●

Never exceed the vehicle capacity weight.

Passengers and luggage weight should be placed so that the vehicle is balanced.

502

WARNING

■

Proper inflation is critical to save tire performance

Keep your tires properly inflated.

If the tires are not properly inflated, the following conditions may occur which could

lead to an accident resulting in death or serious injury:

●

Excessive wear

●

Uneven wear

●

Poor handling

●

Possibility of blowouts resulting from overheated tires

●

Air leaking from between tire and wheel

●

Wheel deformation and/or tire damage

●

Greater possibility of tire damage while driving (due to road hazards, expansion

joints, sharp edges in the road, etc.)

NOTICE

■

When inspecting and adjusting tire inflation pressure

Be sure to put the tire valve caps back on.

If a valve cap is not installed, dirt or moisture may get into the valve and cause an air

leak, resulting in decreased tire inflation pressure.

503

Main

Wheels

When replacing wheels, care should be taken to ensure that they are equivalent
to those removed in load capacity, diameter, rim width, and inset

Replacement wheels are available at your Lexus dealer.

: Conventionally referred to as “offset”.

Lexus does not recommend using the following:

●

Wheels of different sizes or types

●

Used wheels

●

Bent wheels that have been straightened

●

Use only Lexus wheel nuts and wrenches designed for use with your alumi-
num wheels.

●

When rotating, repairing or changing your tires, check that the wheel nuts are
still tight after driving 1000 miles (1600 km).

●

Be careful not to damage the aluminum wheels when using tire chains.

●

Use only Lexus genuine balance weights or equivalent and a plastic or rubber
hammer when balancing your wheels.

■

When replacing wheels

The wheels of your vehicle are equipped with tire pressure warning valves and transmit-

ters that allow the tire pressure warning system to provide advance warning in the event

of a loss in tire inflation pressure. Whenever wheels are replaced, tire pressure warning

valves and transmitters must be installed. (



P. 489)

If a wheel is bent, cracked or heavily corroded, it should be replaced.
Otherwise, the tire may separate from the wheel or cause loss of handling
control.

Wheel selection

Aluminum wheel precautions

504

WARNING

■

When replacing wheels

●

Do not use wheels that are a different size from those recommended in the Owner’s

Manual, as this may result in a loss of handling control.

●

Never use an inner tube in a leaking wheel which is designed for a tubeless tire. Doing

so may result in an accident, causing death or serious injury.

■

Use of defective wheels prohibited

Do not use cracked or deformed wheels.

Doing so could cause the tire to leak air during driving, possibly causing an accident.

NOTICE

■

Replacing tire pressure warning valves and transmitters

●

Because tire repair or replacement may affect the tire pressure warning valves and

transmitters, make sure to have tires serviced by your Lexus dealer or other qualified

service shop. In addition, make sure to purchase your tire pressure warning valves

and transmitters at your Lexus dealer.

●

Ensure that only genuine Lexus wheels are used on your vehicle.

Tire pressure warning valves and transmitters may not work properly with non-genu-

ine wheels.

505

Main

Air conditioning filter

Turn the engine switch off.
Open the glove box and remove the
glove box cover.

Remove the filter cover.

The air conditioning filter must be changed regularly to maintain air condi-
tioning efficiency.

Removal method

506

Slide and pull out the filter. Replace
the filter with a new one.

The “



UP” marks shown on the filter

should be pointing up.

■

Changing interval

Inspect and replace the air conditioning filter according to the maintenance schedule. In

dusty areas or areas with heavy traffic flow, early replacement may be required.

(For scheduled maintenance information, please refer to the “Owner’s Manual

Supplement” or “Scheduled Maintenance”.)

■

If air flow from the vents decreases dramatically

The filter may be clogged. Check the filter and replace if necessary.

NOTICE

■

When using the air conditioning system

Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the system.

507

Main