Lexus IS300 (2023 year). Manual in english - page 9

Brake fluid

Is the brake fluid at the
correct level?
(

Engine/inter-
cooler coolant

Is the engine/inter-
cooler coolant at the
correct level?
(

Engine oil

Is the engine oil at the
correct level?
(

Exhaust system

There should not be
any fumes or strange
sounds.

278

6-2. Maintenance

Radiator, con-
denser and inter-
cooler radiator

The radiator and con-
denser should be free
from foreign objects.
(



Washer fluid

Is there sufficient
washer fluid?
(



Vehicle interior

Items

Check points

Accelerator
pedal

• The accelerator

pedal should move
smoothly (without
uneven pedal effort
or catching).

Automatic trans-
mission “Park”
mechanism

• When parked on a

slope and the shift
lever is in P, is the
vehicle securely
stopped?

Brake pedal

• Does the brake

pedal move
smoothly?

• Does the brake

pedal have appro-
priate clearance
from the floor?

• Does the brake

pedal have the cor-
rect amount of free
play?

Items

Check points

Brakes

• The vehicle should

not pull to one side
when the brakes are
applied.

• The brakes should

work effectively.

• The brake pedal

should not feel
spongy.

• The brake pedal

should not get too
close to the floor
when the brakes are
applied.

Head restraints

• Do the head

restraints move
smoothly and lock
securely?

Indicators/buzz-
ers

• Do the indicators

and buzzers function
properly?

Lights

• Do all the lights

come on?

Parking brake

• Does the parking

brake operate nor-
mally?

• When parked on a

slope and the park-
ing brake is on, is the
vehicle securely
stopped?

Seat belts

• Do the seat belts

operate smoothly?

• The seat belts should

not be damaged.

Items

Check points

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Seats

• Do the seat controls

operate properly?

Steering wheel

• Does the steering

wheel rotate
smoothly?

• Does the steering

wheel have the cor-
rect amount of free
play?

• There should not be

any strange sounds
coming from the
steering wheel.

Vehicle exterior

Items

Check points

Doors/trunk

• Do the doors/trunk

operate smoothly?

Engine hood

• Does the engine

hood lock system
work properly?

Fluid leaks

• There should not be

any signs of fluid
leakage after the
vehicle has been
parked.

Items

Check points

Tires

• Is the tire inflation

pressure correct?

• The tires should not

be damaged or
excessively worn.

• Have the tires been

rotated according to
the maintenance
schedule?

• The wheel bolts

should not be loose.

Windshield wip-
ers

• The wiper blades

should not show any
signs of cracking,
splitting, wear, con-
tamination or defor-
mation.

• The wiper blades

should clear the
windshield without
streaking or skip-
ping.

Items

Check points

280

6-2. Maintenance

The OBD system determines that a
problem exists somewhere in the emis-
sion control system. Your vehicle may
not pass the I/M test and may need to
be repaired. Contact your Lexus
dealer to service the vehicle.



When the battery is disconnected
or discharged

Readiness codes that are set during ordi-
nary driving are erased.
Also, depending on your driving habits, the
readiness codes may not be completely
set.



When the fuel tank cap is loose

The malfunction indicator lamp comes on
indicating a temporary malfunction and
your vehicle may not pass the I/M test.

The error code in the OBD system will
not be cleared unless the vehicle is
driven 40 or more times.

Contact your Lexus dealer to prepare
the vehicle for re-testing.

Emission inspection and
maintenance (I/M) pro-
grams

Some states have vehicle emission
inspection programs which include
OBD (On Board Diagnostics)
checks. The OBD system monitors
the operation of the emission con-
trol system.

If the malfunction indicator lamp
comes on

Your vehicle may not pass the
I/M test in the following situa-
tions:

When the malfunction indicator
lamp still remains on after sev-
eral driving trips

If your vehicle does not pass the
I/M test

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6-3.Do-it-yourself maintenance

Do-it-yourself service pre-
cautions

If you perform maintenance by
yourself, be sure to follow the cor-
rect procedure as given in these
sections.

Maintenance

Items

Parts and tools

Battery condition
(



• Warm water
• Baking soda
• Grease
• Conventional

wrench (for terminal
clamp bolts)

Brake fluid level
(



• SAE J1703 or

FMVSS No.116 DOT
3, or SAE J1704 or
FMVSS No. 116
DOT 4 brake fluid

• Rag or paper towel
• Funnel (used only for

adding brake fluid)

Engine/inter-
cooler coolant
level (



• “Toyota Super Long

Life Coolant” or a
similar high quality
ethylene gly-
col-based non-sili-
cate, non-amine,
non-nitrite and
non-borate coolant
with long-life hybrid
organic acid tech-
nology
For the U.S.A.:
“Toyota Super Long
Life Coolant” is
pre-mixed with 50%
coolant and 50%
deionized water.
For Canada:
“Toyota Super Long
Life Coolant” is
pre-mixed with 55%
coolant and 45%
deionized water.

• Funnel (used only for

adding coolant)

Engine oil level
(

• “Toyota Genuine

Motor Oil” or equiv-
alent

• Rag or paper towel
• Funnel (used only for

adding engine oil)

Fuses (



• Fuse with same

amperage rating as
original

Items

Parts and tools

282

6-3. Do-it-yourself maintenance

Light bulbs
(



P.311)

• Bulb with same num-

ber and wattage rat-
ing as original

• Phillips-head screw-

driver

• Flathead screw-

driver

• Wrench

Radiator, con-
denser and inter-
cooler radiator
(





Tire inflation pres-
sure (



P.302)

• Tire pressure gauge
• Compressed air

source

Washer fluid
(



• Water or washer

fluid containing anti-
freeze (for winter
use)

• Funnel (used only for

adding water or
washer fluid)

WARNING

The engine compartment contains many

mechanisms and fluids that may move

suddenly, become hot, or become elec-

trically energized. To avoid death or seri-

ous injury, observe the following

precautions.

■

When working on the engine com-

partment

●

Keep hands, clothing and tools away

from the moving fan and engine drive

belt.

●

Be careful not to touch the engine,

radiator, exhaust manifold, etc. right

after driving as they may be hot. Oil

and other fluids may also be hot.

Items

Parts and tools

●

Do not leave anything that may burn

easily, such as paper and rags, in the

engine compartment.

●

Do not smoke, cause sparks or expose

an open flame to fuel or the battery.

Fuel and battery fumes are flammable.

●

Be extremely cautious when working

on the battery. It contains poisonous

and corrosive sulfuric acid.

■

When working near the electric cool-

ing fans or radiator grille

Be sure the engine switch is off.

With the engine switch in IGNITION

ON mode, the electric cooling fans may

automatically start to run if the air condi-

tioning is on and/or the coolant tempera-

ture is high. (

■

Safety glasses

Wear safety glasses to prevent flying or

falling material, fluid spray, etc. from get-

ting in your eyes.

NOTICE

■

If you remove the air cleaner filter

Driving with the air cleaner filter

removed may cause excessive engine

wear due to dirt in the air.

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6-3. Do-it-yourself maintenance

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Release the lock from the inside of the
vehicle to open the hood.

Pull the hood lock release lever.

The hood will pop up slightly.

Pull the auxiliary catch lever to the
left and lift the hood.

■

If a symbol indicating the hood opens is

shown on the multi-information display

P.93

■

Front



2WD models

Hood

Opening the hood

WARNING

■

Pre-driving check

Check that the hood is fully closed and

locked.

If the hood is not locked properly, it may

open while the vehicle is in motion and

cause an accident, which may result in

death or serious injury.

Positioning a floor jack

When using a floor jack, follow the
instructions in the manual provided
with the jack and perform the oper-
ation safely.

When raising your vehicle with a
floor jack, position the jack cor-
rectly. Improper placement may
damage your vehicle or cause
injury.

Location of the jack point

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

IS350 AWD/IS350/IS300 AWD

Fuse boxes (

Battery (



Engine oil level dipstick (

Engine coolant reservoir (



Engine oil filler cap (



P.288)

Brake fluid reservoir (



Washer fluid tank (



Electric cooling fans
Condenser (



Radiator (



Engine compartment

Components

A
B
C
D

E
F

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6-3. Do-it-yourself maintenance



IS300

Fuse boxes (

Battery (



Intercooler
Engine oil level dipstick (

Engine oil filler cap (



P.288)

Engine coolant reservoir (



Brake fluid reservoir (



Washer fluid tank (



Electric cooling fans
Condenser (



Intercooler radiator (



Radiator (



Intercooler coolant reservoir (

A
B
C
D

E
F

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

IS500

Fuse boxes (

Battery (



Engine oil level dipstick (

Engine coolant reservoir (



Engine oil filler cap (



P.288)

Brake fluid reservoir (



Washer fluid tank (



Electric cooling fans
Condenser (



Radiator (



With the engine at operating tempera-
ture and turned off, check the oil level
on the dipstick.

■

Checking the engine oil

Park the vehicle on level ground.
After warming up the engine and
turning it off, wait more than 5 min-
utes for the oil to drain back into the
bottom of the engine.

Holding a rag under the end, pull
the dipstick out.

A
B
C
D

E
F

Checking and adding the engine
oil

288

6-3. Do-it-yourself maintenance



IS350 AWD/IS350/IS300 AWD



IS300



IS500

Wipe the dipstick clean.

Reinsert the dipstick fully.

Holding a rag under the end, pull
the dipstick out and check the oil
level.

Low
Normal
Excessive

The shape of the dipstick may differ

depending on the type of vehicle or

engine.

Wipe the dipstick and reinsert it
fully.

■

Adding engine oil

If the oil level is below or near the low
level mark, add engine oil of the same
type as that already in the engine.



IS350 AWD/IS350/IS300 AWD

A
B
C

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

IS300



IS500

Remove the oil filler cap by turning
it counterclockwise.

Add engine oil slowly, checking the
dipstick.

Install the oil filler cap by turning it
clockwise.

■

Checking the oil type and prepar-
ing the item needed

Make sure to check the oil type and
prepare the items needed before add-
ing oil.



Engine oil selection



P.365



Oil quantity (Low



Full)

1.6 qt. (1.5 L, 1.3 Imp. qt.)



Item
Clean funnel

■

Engine oil consumption

A certain amount of engine oil will be con-

sumed while driving. In the following situa-

tions, oil consumption may increase, and

engine oil may need to be refilled in

between oil maintenance intervals.

●

When the engine is new, for example

directly after purchasing the vehicle or

after replacing the engine

●

If low quality oil or oil of an inappropriate

viscosity is used

●

When driving at high engine speeds or

with a heavy load, or when driving while

accelerating or decelerating frequently

●

When leaving the engine idling for a long

time, or when driving frequently through

heavy traffic

■

After changing the engine oil (IS350

AWD/IS350/IS300 AWD/IS300)

The engine oil maintenance data should be

reset. Perform the following procedures:

Press

of the meter control

switch to select

on the multi-infor-

mation display.

Press

of the meter control

switch, select the “Vehicle Settings”

then “Oil Maintenance”. (To confirm
setting, press

Select the “Yes” and press

A message will be displayed on the

multi-information display when the

reset procedure has been completed.

WARNING

■

Used engine oil

●

Used engine oil contains potentially

harmful contaminants which may

cause skin disorders such as inflamma-

tion and skin cancer, so care should be

taken to avoid prolonged and

repeated contact. To remove used

engine oil from your skin, wash thor-

oughly with soap and water.

290

6-3. Do-it-yourself maintenance

■

Engine coolant reservoir

The coolant level is satisfactory if it is
between the “FULL” and “LOW” lines
on the reservoir when the engine is
cold.



IS350 AWD/IS350/IS300



IS300



IS500

Reservoir cap
“FULL” line
“LOW” line

If the level is on or below the “LOW” line,
add coolant up to the “FULL” line.
(

P.355)

■

Intercooler coolant reservoir
(IS300)

The coolant level is satisfactory if it is

WARNING

●

Dispose of used oil and filters only in a

safe and acceptable manner. Do not

dispose of used oil and filters in house-

hold trash, in sewers or onto the

ground.

Call your Lexus dealer, service station

or auto parts store for information

concerning recycling or disposal.

●

Do not leave used engine oil within the

reach of children.

NOTICE

■

To prevent serious engine damage

Check the oil level on a regular basis.

■

When replacing the engine oil

●

Be careful not to spill engine oil on the

vehicle components.

●

Avoid overfilling, or the engine could

be damaged.

●

Check the oil level on the dipstick

every time you refill the vehicle.

●

Be sure the engine oil filler cap is prop-

erly tightened.

Checking the coolant

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between the “F” and “L” lines on the
reservoir when the engine is cold.

Reservoir cap
“F” line
“L” line

If the level is on or below the “L” line, add
coolant up to the “F” line. (

P.355)

■

Coolant selection

Only use “Toyota Super Long Life Coolant”

or a similar high quality ethylene glycol

based non-silicate, non-amine, non-nitrite,

and non-borate coolant with long-life

hybrid organic acid technology.
U.S.A.:
“Toyota Super Long Life Coolant” is a mix-

ture of 50% coolant and 50% deionized

water. (Minimum temperature: -31°F

[-35°C])
Canada:
“Toyota Super Long Life Coolant” is a mix-

ture of 55% coolant and 45% deionized

water. (Minimum temperature: -44°F

[-42°C])
For more details about engine coolant, con-

tact your Lexus dealer.

■

If the coolant level drops within a short

time of replenishing

Visually check the radiator, hoses, engine

coolant reservoir cap, drain cock and water

pump.

If you cannot find a leak, have your Lexus

dealer test the cap and check for leaks in

the cooling system.

Check the radiator, condenser and
intercooler radiator (if equipped) and
clear away any foreign objects.
If any of the above parts are extremely
dirty or you are not sure of their condi-
tion, have your vehicle inspected by
your Lexus dealer.

WARNING

■

When the engine is hot

Do not remove the engine coolant reser-

voir cap, intercooler coolant reservoir

cap (IS300), or coolant inlet cap.

(

P.358)

The cooling system may be under pres-

sure and may spray hot coolant if the cap

is removed, causing serious injuries, such

as burns.

NOTICE

■

When adding coolant

Coolant is neither plain water nor

straight antifreeze. The correct mixture

of water and antifreeze must be used to

provide proper lubrication, corrosion

protection and cooling. Be sure to read

the antifreeze or coolant label.

■

If you spill coolant

Be sure to wash it off with water to pre-

vent it from damaging parts or paint.

Checking the radiator, con-
denser and intercooler radiator
(if equipped)

WARNING

■

When the engine is hot

Do not touch the radiator, condenser or

intercooler radiator (if equipped) as they

may be hot and cause serious injuries,

such as burns.

292

6-3. Do-it-yourself maintenance

■

Checking fluid level

The brake fluid level should be
between the “MAX” and “MIN” lines
on the tank.

■

Adding fluid

Make sure to check the fluid type and
prepare the necessary item.



Fluid type

FMVSS No.116 DOT 3 or SAE J1703
brake fluid
FMVSS No.116 DOT 4 or SAE J1704
brake fluid



Item

Clean funnel

■

Brake fluid can absorb moisture from

the air

Excess moisture in the brake fluid can cause

a dangerous loss of braking efficiency. Use

only newly opened brake fluid.

Check the battery as follows.

■

Battery exterior

Make sure that the battery terminals
are not corroded and that there are no
loose connections, cracks, or loose
clamps.

Terminals
Hold-down clamp

Checking and adding the brake
fluid

WARNING

■

When filling the reservoir

Take care as brake fluid can harm your

hands and eyes and damage painted sur-

faces.

If fluid gets on your hands or in your eyes,

flush the affected area with clean water

immediately.
If you still experience discomfort, see a

doctor.

NOTICE

■

If the fluid level is low or high

It is normal for the brake fluid level to go

down slightly as the brake pads wear out

or when the fluid level in the accumulator

is high.

If the reservoir needs frequent refilling,

there may be a serious problem.

Battery

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■

Before recharging

When recharging, the battery produces

hydrogen gas which is flammable and

explosive. Therefore, observe the following

before recharging:

●

If recharging with the battery installed on

the vehicle, be sure to disconnect the

ground cable.

●

Make sure the power switch on the char-

ger is off when connecting and discon-

necting the charger cables to the battery.

■

After recharging/reconnecting the bat-

tery

The engine may not start. Follow the proce-

dure below to initialize the system.

Shift the shift lever to P.

Open and close any of the doors.

Restart the engine.

●

Unlocking the doors using the smart

access system with push-button start may

not be possible immediately after recon-

necting the battery. If this happens, use

the wireless remote control or the

mechanical key to lock/unlock the doors.

●

Start the engine with the engine switch in

ACCESSORY mode. The engine may

not start with the engine switch turned off.

However, the engine will operate nor-

mally from the second attempt.

●

The engine switch mode is recorded by

the vehicle. If the battery is disconnected

and reconnected, the vehicle will return

the engine switch mode to the status it

was in before the battery was discon-

nected. Make sure to turn off the engine

before disconnecting the battery. Take

extra care when connecting the battery if

the engine switch mode prior to the bat-

tery being disconnected is unknown.

If the system will not start even after multiple

attempts, contact your Lexus dealer.

WARNING

■

Chemicals in the battery

Batteries contain poisonous and corro-

sive sulfuric acid and may produce

hydrogen gas which is flammable and

explosive. To reduce the risk of death or

serious injury, take the following precau-

tions while working on or near the bat-

tery:

●

Do not cause sparks by touching the

battery terminals with tools.

●

Do not smoke or light a match near the

battery.

●

Avoid contact with eyes, skin and

clothes.

●

Never inhale or swallow electrolyte.

●

Wear protective safety glasses when

working near the battery.

●

Keep children away from the battery.

■

Where to safely charge the battery

Always charge the battery in an open

area. Do not charge the battery in a

garage or closed room where there is

insufficient ventilation.

■

How to recharge the battery

Only perform a slow charge (5 A or

less). The battery may explode if charged

at a quicker rate.

■

Emergency measures regarding

electrolyte

●

If electrolyte gets in your eyes

Flush your eyes with clean water for at

least 15 minutes and get immediate

medical attention. If possible, continue

to apply water with a sponge or cloth

while traveling to the nearest medical

facility.

●

If electrolyte gets on your skin

Wash the affected area thoroughly. If

you feel pain or burning, get medical

attention immediately.

294

6-3. Do-it-yourself maintenance

If any washer does not work or the
warning message appears on the
multi-information display, the washer
tank may be empty. Add washer fluid.

WARNING

●

If electrolyte gets on your clothes

It can soak through clothing on to your

skin. Immediately take off the clothing

and follow the procedure above if nec-

essary.

●

If you accidentally swallow electrolyte

Drink a large quantity of water or milk.

Get emergency medical attention

immediately.

■

When there is insufficient battery

fluid

Do not use if there is insufficient fluid in

the battery. There is a possible danger

that the battery may explode.

NOTICE

■

When recharging the battery

Never recharge the battery while the

engine is running. Also, be sure all acces-

sories are turned off.

Adding the washer fluid

WARNING

■

When adding washer fluid

Do not add washer fluid when the engine

is hot or running as washer fluid contains

alcohol and may catch fire if spilled on

the engine, etc.

NOTICE

■

Do not use any fluid other than

washer fluid

Do not use soapy water or engine anti-

freeze instead of washer fluid.

Doing so may cause streaking on the

vehicle’s painted surfaces, as well as

damaging the pump leading to problems

of the washer fluid not spraying.

■

Diluting washer fluid

Dilute washer fluid with water as neces-

sary.

Refer to the freezing temperatures listed

on the label of the washer fluid bottle.

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Check if the treadwear indicators are
showing on the tires. Also check the
tires for uneven wear, such as excessive
wear on one side of the tread.
Check the spare tire condition and
pressure if not rotated.

New tread
Worn tread
Treadwear indicator

The location of treadwear indicators is
shown by a “TWI” or “

” mark, etc.,

molded into the sidewall of each tire.
Replace the tires if the treadwear indica-
tors are showing on a tire.

■

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 loca-

tion of a cut or other damage

If you are not sure, consult with your Lexus

dealer.

■

Tire life

Any tire over 6 years old must be checked

by a qualified technician even if it has sel-

dom or never been used or damage is not

obvious.

■

Maximum load of tire

Check that the maximum load 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, which-

ever 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 mentioned on the sidewall of the

tire. (

P.376)

■

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

Tires

Replace or rotate tires in accor-
dance with maintenance schedules
and treadwear.

Checking tires

A
B
C

296

6-3. Do-it-yourself maintenance

roads, the use of snow tires is recom-
mended. 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,
however, 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 per-
formance 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 equip-
ment, make sure your snow tires also have
radial construction. Do not install studded
tires without first checking local regula-
tions for possible restrictions. Snow tires
should be installed on all wheels.
(



P.234)

■

Low profile tires

Generally, low profile tires will wear more

rapidly and tire grip performance will be

reduced on snowy and/or icy roads when

compared to standard tires. Be sure to use

snow tires or tire chains* on snowy and/or

icy roads and drive carefully at a speed

appropriate for road and weather condi-

tions.

: Vehicles with front and rear tires of dif-

fering sizes: Tire chains cannot be
mounted. Snow tires should be used
instead.

■

If the tread on snow tires wears down

below 0.16 in. (4 mm)

The effectiveness of the tires as snow tires is

lost.

WARNING

■

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 danger-

ous 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.

●

Do not tow if your vehicle has a com-

pact spare tire installed.

NOTICE

■

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 cushion-

ing ability of the tires. In addition, driving

on rough roads may cause damage to

the tires themselves, as well as the vehi-

cle’s wheels and body.

■

Low profile tires

Low profile tires may cause greater dam-

age than usual to the tire wheel when

sustaining impact from the road surface.

Therefore, pay attention to the following:

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Rotate the tires in the order shown.



Vehicles with front and rear tires of
the same size

To equalize tire wear and extend tire
life, Lexus recommends that tire rota-
tion is carried out at the same interval
as tire inspection.
Do not fail to initialize the tire pressure
warning system after tire rotation.



Vehicles with front and rear tires of
differing sizes

Tires cannot be rotated.

■

When rotating the tires

Make sure that the engine switch is off. If the

tires are rotated while the engine switch is in

IGNITION ON mode, the tire position

information will not be updated.
If this accidentally occurs, either turn the

engine switch to off and then to IGNITION

ON mode, or initialize the system after

checking that the tire pressure is properly

adjusted.

Your vehicle is equipped with a tire
pressure warning system that uses tire
pressure warning valves and transmit-
ters to detect low tire inflation pressure
before serious problems arise.



The tire pressure detected by the
tire pressure warning system can be
displayed on the multi-information
display.



If the tire pressure drops below a
predetermined level, the driver is
warned by a screen display and a
warning light. (



P.331)

NOTICE

●

Be sure to use proper tire inflation

pressure. If tires are under-inflated,

they may be damaged more severely.

●

Avoid potholes, uneven pavement,

curbs and other road hazards. Failure

to do so may lead to severe tire and

wheel damage.

■

If tire inflation pressure of each tire

becomes low while driving

Do not continue driving, or your tires

and/or wheels may be ruined.

Tire rotation

Tire pressure warning system

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6-3. Do-it-yourself maintenance

■

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.

■

Tire inflation pressure

●

It may take a few minutes to display the

tire inflation pressure after the engine

switch is turned to IGNITION ON mode.

It may also take a few minutes to display

the tire inflation pressure after inflation

pressure has been adjusted.

●

Tire inflation pressure changes with tem-

perature. The displayed values may also

be different from the values measured

using a tire pressure gauge.

■

Situations in which the tire pressure

warning system may not operate prop-

erly

●

In the following cases, the tire pressure

warning system may not operate prop-

erly.

• If non-genuine Lexus wheels are used.

• If a tire has been replaced with a tire that

is not an OE (Original Equipment) tire.

• If a tire has been replaced with a tire that

is not of the specified size.

• If tire chains, etc. are installed.

• 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 vehi-

cle, particularly around the wheels or

wheel housings.

• If the tire inflation pressure is extremely

higher than the specified level.

• If tires not equipped with tire pressure

warning valves and transmitters are used.

• If the ID code on the tire pressure warn-

ing valves and transmitters is not regis-

tered in the tire pressure warning

computer.

●

Performance may be affected in the fol-

lowing situations.

• When driving near a TV tower, electric

power plant, gas station, radio station,

large display, airport or other facility that

generates strong radio waves or electri-

cal 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 rap-

idly for example when a tire has burst, the

warning may not function.

■

Warning performance of the tire pres-

sure warning system

The warning of the tire pressure warning

system will change in accordance with driv-

ing conditions. 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 initial-

ized.

When replacing the tires or wheels, the
tire pressure warning valve and trans-
mitters must be installed to the wheels
which will be installed to the vehicle.
When new tire pressure warning
valves and transmitters are installed,
new ID codes must be registered in the
tire pressure warning computer and
the tire pressure warning system must
be initialized. (

P.300)

■

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 min-

utes, the tire pressure warning light blinks

for 1 minute and stays on to indicate a sys-

Installing tire pressure warning
valves and transmitters

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tem malfunction.

■

The tire pressure warning system
must be initialized in the following
circumstances:



When rotating the tires.



When the tire inflation pressure is
changed such as when changing
traveling speed or load weight.



When changing the tire size.

When the tire pressure warning system
is initialized, the current tire inflation
pressure is set as the benchmark pres-
sure.

■

How to initialize the tire pressure
warning system

Park the vehicle in a safe place, turn
the engine switch off and wait 20
minutes or more.

Initialization cannot be performed while

the vehicle is moving.

Adjust the tire inflation pressure to
the specified cold tire inflation pres-
sure level.

Make sure to adjust the tire pressure to the

specified cold tire inflation pressure level.

The tire pressure warning system will oper-

ate based on this pressure level.

Start the engine. (



P.130)

Press and hold the tire pressure
warning reset switch until the tire
pressure warning light blinks slowly
3 times.

Then a message will be displayed on the

multi-information display.

Drive straight (with occasional left
and right turns) at approximately
25 mph (40 km/h) or more for
approximately 10 to 30 minutes.

Initialization is complete when the position

of each tire is determined and the inflation

NOTICE

■

Repairing or replacing tires, wheels,

tire pressure warning valves, trans-

mitters 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 warn-

ing valves and transmitters may be

damaged if not handled correctly.

●

Make sure to install the tire valve caps.

If a tire valve cap is not installed, water

may enter the valve and cause it to

corrode, possibly leading to the valve

sticking or air to leak from the tire.

●

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 seal-

ants, the tire pressure warning valve and

transmitter may not operate properly. If a

liquid sealant is used, contact your Lexus

dealer or other qualified service shop as

soon as possible. After use of liquid seal-

ant, make sure to replace the tire pres-

sure warning valve and transmitter when

repairing or replacing the tire.

Initializing the tire pressure
warning system

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6-3. Do-it-yourself maintenance

pressure of each tire is displayed on the

multi-information display.

■

Initialization procedure

●

Make sure to perform the initialization

procedure after adjusting the tire inflation

pressure.

Also, make sure the tires are cold before

performing the initialization procedure or

adjusting the tire inflation pressure.

●

If you have accidentally turned the engine

switch off during initialization, it is not

necessary to press the reset switch again

as initialization will restart automatically

when the engine switch has been turned

to IGNITION ON mode for the next

time.

●

If you accidentally press the reset switch

when initialization is not necessary, adjust

the tire inflation pressure to the specified

level when the tires are cold, and conduct

initialization 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.

■

If the tire pressure warning system is not

initialized properly

●

In the following situations, initialization

may take longer than usual to be com-

pleted or may not be possible. (Usually,

the vehicle will need to be driven for

approximately 10 to 30 minutes to com-

plete initialization.) If initialization is not

complete after driving approximately 30

minutes, continue driving for a while.

• If the vehicle is driven on an unpaved

road, it may take longer to complete ini-

tialization.

• If the vehicle is backed up while perform-

ing initialization, data collected during ini-

tialization will be cleared and it will take

longer than normal to complete.

• If the vehicle is driven in heavy traffic or

another situation where other vehicles

are driven close by, it may take time for

the system to recognize the tire pressure

warning valve and transmitters of your

vehicle over those of other vehicles.

If initialization is not complete after driving

for approximately 1 hour, park the vehicle in

a safe place for approximately 20 minutes

and then drive the vehicle again.

●

In the following situations, initialization

will not be started or was not completed

properly and the system will not operate

properly. Perform the initialization proce-

dure 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 ini-

tialization, the tire pressure warning light

blinks for approximately 1 minute and

then illuminates.

●

If initialization cannot be completed after

performing the above procedure, con-

tact your Lexus dealer.

Every tire pressure warning valve and
transmitter has a unique ID code.
When replacing a tire pressure warn-
ing valve and transmitter, it is necessary
to register the ID codes.

Park the vehicle in a safe place, turn
the engine switch off, wait 20 min-
utes or more, and then start the
engine.

Registering cannot be performed while the

vehicle is moving.

WARNING

■

When initializing the tire pressure

warning system

Do not operate the tire pressure warning

reset switch 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.

Registering ID codes

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Start the engine. (

P.130)

Press the tire pressure warning
reset switch 3 times quickly.

The tire pressure warning light will blink

slowly 3 times.
Sensor registration mode will be entered

and ID codes registration will begin.
A message will be displayed on the

multi-information display and “- -” will be

displayed for the tire inflation pressure of

each tire.
After this, the tire pressure warning light

will blink for 1 minute and then illuminate.

Wait approximately 2 minutes.

If the ID codes are already registered, the

tire pressure warning light will turn off.



If the tire pressure warning light
turns off

Initialize the tire pressure warning
system. (



P.299)



If the tire pressure warning light
does not turn off

Drive at approximately 25 mph
(40 km/h) or more until the tire
pressure warning light turns off.

Initialize the tire pressure warning
system. (



P.299)

■

When registering ID codes

●

Before performing ID code registration,

make sure that no wheels with tire pres-

sure warning valve and transmitters

installed are near the vehicle.

●

Make sure to initialize the tire pressure

warning system after registering the ID

codes. If the system is initialized before

registering the ID codes, the initialized

values will be invalid.

●

As the tires will be warm when registra-

tion is completed, make sure to allow the

tires to cool before performing initializa-

tion.

■

Canceling ID code registration

●

To cancel ID code registration after it has

been started, turn the engine switch off

before driving the vehicle.

If the vehicle is driven after ID code regis-

tration is started, to cancel registration,

perform the ID code registration start

procedure again and turn the engine

switch off before driving.

●

If ID code registration has been canceled,

the tire pressure warning light will blink

for approximately 1 minute when the

engine switch is turned to IGNITION

ON mode and then illuminate. The tire

pressure warning system will be opera-

tional when the tire pressure warning

light turns off.

●

If the warning light does not turn off even

after several minutes have elapsed, ID

code registration may not have been can-

celled correctly. To cancel registration,

perform the ID code registration start

procedure again and then turn the engine

switch off before driving.

■

If ID codes are not registered properly

●

In the following situations, ID code regis-

tration may take longer than usual to be

completed or may not be possible. (Usu-

ally, the vehicle will need to be driven for

approximately 10 to 30 minutes to com-

plete ID code registration.)

If ID code registration is not complete

after driving for approximately 30 min-

utes, continue driving for a while.

• If the vehicle is driven on an unpaved

road, it may take longer than normal to

complete registration.

• If the vehicle is backed up while perform-

ing registration, data collected during

registration will be cleared, and it will take

longer than normal to complete.

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6-3. Do-it-yourself maintenance

• If the vehicle is driven in heavy traffic or

another situation where other vehicles

are driven close by, it may take time for

the system to recognize the tire pressure

warning valve and transmitters of your

vehicle over those of other vehicles.

• If a wheel with a tire pressure warning

valve and transmitter installed is inside or

near the vehicle, registration of the ID

codes for the installed wheels may not be

possible.

If ID registration is not complete after driv-

ing for approximately 1 hour, park the vehi-

cle in a safe place for approximately 20

minutes and then perform the ID code reg-

istration procedure again.

●

In the following situations, ID code regis-

tration will not be started or was not com-

pleted properly and the system will not

operate properly. Perform the ID code

registration procedure again.

• If, when attempting to start ID code regis-

tration, the tire pressure warning light

does not blink slowly 3 times.

• If, when the vehicle has been driven for

about 20 minutes after performing ID

code registration, the tire pressure warn-

ing light blinks for approximately 1 minute

and then illuminates.

●

If ID code registration cannot be com-

pleted after performing the above proce-

dure, contact your Lexus dealer.

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