Lexus UX250h (2023 year). Manual in english

331

6-3. Do-it-yourself maintenance

ain

ten

ce an

Fuse boxes (



P.361)

Engine coolant reservoir (



P.333)

Engine oil filler cap (



P.332)

Power control unit coolant reservoir (



P.334)

Brake fluid reservoir (



P.335)

Radiator (



P.334)

Condenser (



P.334)

Electric cooling fans

Engine oil level dipstick (



P.331)

Washer fluid tank (



P.335)

■

12-volt battery



P.336

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

Engine compartment

Components

A
B
C
D

E
F

Checking and adding the engine
oil

332

6-3. Do-it-yourself maintenance

on the dipstick.

■

Checking the engine oil

Park the vehicle on level ground.
After warming up the engine and
turning off the hybrid system, wait
more than 5 minutes for the oil to
drain back into the bottom of the
engine.

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

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

Wipe the dipstick and reinsert it
fully.

■

Checking the oil type and prepar-
ing the items needed

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



Engine oil selection



P.410



Oil quantity (Low



Full)

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



Items

Clean funnel

■

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.

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.

■

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

A
B
C

333

6-3. Do-it-yourself maintenance

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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

The engine oil maintenance data should be

reset. Perform the following procedures:

Press

of the meter control

switches and select

Press

of the meter control

switches, select “Vehicle Settings” and
then press “OK”.

Press

of the meter control

switches, select “Oil Maintenance” and
then press and hold “OK”.

Select “Yes” and press “OK”.

“Reset Complete” will be displayed when

the reset procedure has been completed.

The coolant level is satisfactory if it is
between the “MAX/F” and “MIN/L”
lines on the reservoir when the hybrid
system is cold.

■

Engine coolant reservoir

Reservoir cap

“MAX” line

“MIN” line

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



P.402)

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.

●

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, ser-

vice 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

A
B
C

334

6-3. Do-it-yourself maintenance

■

Power control unit coolant reser-
voir

Reservoir cap

“F” line

“L” line

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

■

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 coolant, contact

your Lexus dealer.

■

If the coolant level drops within a short

time of replenishing

Visually check the radiator, hoses,

engine/power control unit coolant reser-

voir caps, 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 and condenser and
clear away any foreign objects.
If either of the above parts is extremely
dirty or you are not sure of their condi-
tion, have your vehicle inspected by
your Lexus dealer.

A
B
C

WARNING

■

When the hybrid system is hot

Do not remove the engine/power con-

trol unit coolant reservoir caps.

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 and con-
denser

WARNING

■

When the hybrid system is hot

Do not touch the radiator or condenser

as they may be hot and cause serious

injuries, such as burns.

335

6-3. Do-it-yourself maintenance

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■

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 effi-

ciency. Use only newly opened brake fluid.

If any washer does not work or “Wind-
shield Washer Fluid Low” is shown on
the multi-information display, the
washer tank may be empty. Add
washer fluid.

WARNING

■

When the electric cooling fans are

operating

Do not touch the engine compartment.

With the power switch in ON, the elec-

tric cooling fans may automatically start

to run if the air conditioning is on and/or

the coolant temperature is high. Be sure

the power switch is OFF when working

near the electric cooling fans or radiator

grille.

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.

Adding the washer fluid

336

6-3. Do-it-yourself maintenance

The 12-volt battery is located in the left-
hand side of luggage compartment.

■

Before recharging

When recharging, the 12-volt battery pro-

duces hydrogen gas which is flammable

and explosive. Therefore, observe the fol-

lowing precautions before recharging:

●

If recharging with the 12-volt battery

installed on the vehicle, be sure to dis-

connect the ground cable.

●

Make sure the power switch on the char-

ger is off when connecting and discon-

necting the charger cables to the 12-volt

battery.

■

After recharging/reconnecting the 12-

volt battery

●

Unlocking the doors using the smart

access system with push-button start may

not be possible immediately after recon-

necting the 12-volt battery. If this hap-

pens, use the wireless remote control or

the mechanical key to lock/unlock the

doors.

●

Start the hybrid system with the power

switch in ACC. The hybrid system may

not start with the power switch turned off.

However, the hybrid system will operate

normally from the second attempt.

●

The power switch mode is recorded by

the vehicle. If the 12-volt battery is recon-

nected, the vehicle will return the power

switch mode to the status it was in before

WARNING

■

When adding washer fluid

Do not add washer fluid when the hybrid

system is hot or operating 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.

12-volt battery

Location

337

6-3. Do-it-yourself maintenance

ain

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the 12-volt battery was disconnected.

Make sure to turn off the power switch

before disconnect the 12- volt battery.

Take extra care when connecting the 12-

volt battery if the power switch mode

prior to discharge is unknown.

If the system will not start even after multiple

attempts at all methods above, contact your

Lexus dealer.

Open the right side deck board.
(



P.292)

Remove the right side deck board.

WARNING

■

Chemicals in the 12-volt battery

The 12-volt battery contains poisonous

and corrosive sulfuric acid and may pro-

duce hydrogen gas which is flammable

and explosive. To reduce the risk of

death or serious injury, take the following

precautions while working on or near the

12-volt battery:

●

Do not cause sparks by touching the

12-volt battery terminals with tools.

●

Do not smoke or light a match near the

12-volt battery.

●

Avoid contact with eyes, skin and

clothes.

●

Never inhale or swallow electrolyte.

●

Wear protective safety glasses when

working near the 12-volt battery.

●

Keep children away from the 12-volt

battery.

■

Where to safely charge the 12-volt

battery

Always charge the 12-volt battery in an

open area. Do not charge the 12-volt

battery in a garage or closed room

where there is insufficient ventilation.

■

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.

●

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 handling the 12-volt battery



P.401

NOTICE

■

When recharging the 12-volt battery

Never recharge the 12-volt battery while

the hybrid system is operating. Also, be

sure all accessories are turned off.

Removing the 12-volt battery
cover

338

6-3. Do-it-yourself maintenance

Remove the 12-volt battery cover.

Make sure that the 12-volt battery ter-
minals are not corroded and that there
are no loose connections, cracks, or
loose clamps.

Terminals

Hold-down clamp

Check the 12-volt battery condition by
indicator color.

Blue: Good condition

Red: Charging is necessary.

Have the vehicle inspected by your Lexus
dealer.

Clear: Replacement is necessary.

Have the 12-volt battery checked by your
Lexus dealer.

Install the 12-volt battery cover.

Install the right side deck board.

Exterior

Checking 12-volt battery condi-
tion

A
B

Installing the 12-volt battery
cover

A
B

339

6-3. Do-it-yourself maintenance

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Check if the treadwear indicators are
showing on the tires. Also check the
tires for uneven wear, such as exces-
sive wear on one side of the tread.

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.417)

■

Tire types

●

Summer tires

Summer tires are high-speed perfor-

mance tires best suited to highway driv-

ing under dry conditions. Since summer

tires do not have the same traction per-

formance as snow tires, summer tires are

inadequate for driving on snow-covered

or icy roads. For driving on snow-cov-

ered roads or icy roads, the use of snow

tires is recommended. When installing

Tires

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

Checking tires

A
B
C

340

6-3. Do-it-yourself maintenance

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 ade-

quate for driving in most winter condi-

tions as well as for use year-round. All

season tires, however, do not have ade-

quate traction performance compared

with snow tires in heavy or loose snow.

Also, all season tires fall short in accelera-

tion and handling performance com-

pared 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

regulations for possible restrictions.

Snow tires should be installed on all

wheels. (



P.267)

■

If the tread on snow tires wears down

below 0.16 in. (4 mm)

The effectiveness of the tires as snow tires is

lost.

■

Replacing tires

Your vehicle may not be equipped with the

following tools and jack for replacing a tire.

In this case, when replacing tires with tires

that are not run-flat tires, purchase tools

and jack. Tools and jack can be purchased

at your Lexus dealer.

●

Wheel nut wrench

●

Jack

●

Jack handle

Rotate the tires in the order shown.

WARNING

■

When inspecting or replacing tires

Observe the following precautions to

prevent accidents.

Failure to do so may cause damage to

parts of the drivetrain 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.

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.

Tire rotation

341

6-3. Do-it-yourself maintenance

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

■

When rotating the tires

Make sure that the power switch is OFF. If

the tires are rotated while the power switch

is in ON, the tire position information will

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

power switch to OFF and then to ON, or

initialize the tire pressure warning system

after checking that the tire pressure is prop-

erly adjusted.

When run-flat tires are installed, the
vehicle can be driven for a maximum of
100 miles (160 km) at a speed below
50 mph (80 km/h) after any tire goes
flat. (However, the vehicle speed may
not increase to near 50 mph [80
km/h] depending on weather or driv-
ing conditions.)

A run-flat tire has a

mark on

the sidewall.

Make sure to replace the flat tire before
the vehicle has been driven for near 100
miles (160 km). Also, do not use a repaired
tire.

■

Run-flat tires

●

The run-flat tires are for only this vehicle.

Do not use the tires on other vehicles.

●

Do not mix run-flat tires and normal tires.

●

If non-genuine Lexus wheels are used, it

may be impossible to sufficiently demon-

strate the performance of run-flat tires.

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.



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



P.379, 387)

The illustration used is intended as an
example, and may differ from the image
that is actually displayed on the multi-infor-
mation display.



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



P.89)

■

Routine tire inflation pressure checks

The tire pressure warning system does not

replace routine tire inflation pressure

checks. Make sure to check tire inflation

Run-flat tires

Tire pressure warning system

342

6-3. Do-it-yourself maintenance

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 power

switch is turned to ON. 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.

• 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 vehi-

cle, particularly around the wheels or

wheel housings.

• If the tire inflation pressure is extremely

higher than the specified level.

• If wheels without 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.

• Near a TV tower, electric power plant,

gas station, radio station, large display,

airport 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 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 the

conditions 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 replacing tires or wheels, tire
pressure warning valves and transmit-
ters must also be installed.

When new tire pressure warning valves
and transmitters are installed, new ID
codes must be registered in the tire pres-
sure warning computer and the tire pres-
sure warning system must be initialized.
(



P.345)

■

When replacing the 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-

tem malfunction.

Installing tire pressure warning
valves and transmitters

343

6-3. Do-it-yourself maintenance

ain

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■

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 tire
size. (When there are multiple spec-
ified pressures)



After registering the ID codes.
(



P.345)

When the tire pressure warning sys-
tem is initialized, the current tire infla-
tion pressure is set as the benchmark
pressure.

■

How to initialize the tire pressure
warning system

Park the vehicle in a safe place and
stop the hybrid system for 20 min-
utes or more.

Initialization cannot be performed while

the vehicle is moving.

Adjust the tire inflation pressure to
the specified cold tire inflation
pressure 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 hybrid system (



P.163)

Press

of the meter con-

trol switches and select

Press

of the meter con-

trol switches and select “Vehicle
Settings”, then press “OK”.

Press

of the meter con-

trol switches and select “TPWS”,
then press “OK”.

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 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 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

344

6-3. Do-it-yourself maintenance

Press

of the meter con-

trol switches and select “Set Pres-
sure”. Then press and hold “OK”
until the tire pressure warning light
starts blinking.

A message is displayed on the multi-infor-

mation display. Also, “--” is displayed for

inflation pressure of each tire on the multi-

information display while the tire pressure

warning system determines the position.

Drive at approximately 25 mph
(40 km/h) or more for approxi-
mately 10 to 30 minutes.

When initialization is complete, the infla-

tion pressure of each tire will be displayed

on the multi-information display.
Even if the vehicle is not driven at approxi-

mately 25 mph (40 km/h) or more, initial-

ization can be completed by driving for a

long time. However, if initialization does

not complete after driving for 1 hour or

more, park the vehicle in a safe place for

approximately 20 minutes and then drive

the vehicle again.

■

When initializing

●

Initialization is performed while driving at

a vehicle speed of approximately 25 mph

(40 km/h) or more.

●

Make sure to carry out initialization after

adjusting the tire inflation pressure. Also,

make sure the tires are cold before carry-

ing out initialization or tire inflation pres-

sure adjustment.

●

The tire pressure warning system can be

initialized by yourself, but depending on

the driving conditions and driving envi-

ronment, initialization may take some

time to complete.

■

The initialization operation

●

If you have accidentally turned the power

switch off during initialization, it is not

necessary to manually restart the initial-

ization again, as initialization will restart

automatically the next time the power

switch is turned to ON.

●

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

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 pres-

sure 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. Normally,

initialization completes within approxi-

mately 30 minutes.

• Vehicle is not driven at approximately 25

mph (40 km/h) or more

• Vehicle is driven on unpaved roads

• Vehicle is driven near other vehicles and

system cannot recognize tire pressure

warning valve and transmitters of your

vehicle over those of other vehicles

If initialization does not complete after driv-
ing for 1 hour or more, park the vehicle in a
safe place for approximately 20 minutes
and then drive the vehicle again.

●

If the vehicle is reversed during initializa-

tion, the data up to that point is reset, so

perform the initialization procedure

again from the beginning.

●

In the following situations, initialization

will not be started or was not completed

properly and the system will not operate

properly. Perform the initialization pro-

cedure again.

• If, when attempting to start initialization,

345

6-3. Do-it-yourself maintenance

ain

ten

ce an

the tire pressure warning light does not

blink 3 times.

• If, when the vehicle has been driven for

about 20 minutes after performing initial-

ization, the tire pressure warning light

blinks for approximately 1 minute and

then illuminates.

If initialization cannot be completed after
performing the above procedure, contact
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 neces-
sary to register the ID code.
When registering the ID codes, per-
form the following procedure.

Park the vehicle in a safe place, wait
for approximately 20 minutes, and
then start the hybrid system.
(



P.163)

Press

of the meter con-

trol switches and select

Press

of the meter con-

trol switches and select “Vehicle
Settings”, then press “OK”.

Press

of the meter con-

trol switches and select “TPWS”,
then press “OK”.

Press

of the meter con-

trol switches and select “Change
Wheel Set”. Then press and hold
“OK” until the tire pressure warn-
ing light starts slowly blinking 3
times.

Then a message will be displayed on the

multi-information display.
When registration is being performed, the

tire pressure warning light will blink for

approximately 1 minute then illuminate and

“- -” will be displayed for the inflation pres-

sure of each tire on the multi-information

display.

Drive at approximately 25 mph
(40 km/h) or more for approxi-
mately 10 to 30 minutes.

Registration is complete when the tire

pressure warning light turns off and the

inflation pressure of each tire is displayed

on the multi-information display.
Even if the vehicle is not driven at approxi-

mately 25 mph (40 km/h) or more, regis-

tration can be completed by driving for a

long time. However, if registration does

not complete after driving for 1 hour or

more, perform the procedure again from

the beginning.

Initialize the tire pressure warning
system. (



P.343)

WARNING

■

When initializing the tire pressure

warning system

Do not initialize tire inflation pressure

without first adjusting the tire inflation

pressure to the specified level. Other-

wise, 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 nor-

mal.

Registering ID codes

346

6-3. Do-it-yourself maintenance

■

When registering ID codes

●

ID code registration is performed while

driving at a vehicle speed of approxi-

mately 25 mph (40 km/h) or more.

●

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.

●

ID codes can be registered by yourself,

but depending on the driving conditions

and driving environment, registration

may take some time to complete.

■

Canceling ID code registration

●

To cancel ID code registration after it has

been started, turn the power 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 power

switch off before driving.

●

If ID code registration has been can-

celed, the tire pressure warning light will

blink for approximately 1 minute when the

power switch is turned to ON and then

illuminate. The tire pressure warning sys-

tem will be operational 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

canceled correctly. To cancel registra-

tion, perform the ID code registration

start procedure again and then turn the

power 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. Nor-

mally, registration completes within

approximately 30 minutes.

• Vehicle is not parked for approximately

20 minutes or more before driving

• Vehicle is not driven at approximately 25

mph (40 km/h) or more

• Vehicle is driven on unpaved roads

• Vehicle is driven near other vehicles and

system cannot recognize tire pressure

warning valves and transmitters of your

vehicle over those of other vehicles

• Wheel with tire pressure warning valve

and transmitter installed is inside or near

the vehicle

●

If registration does not complete after

driving for 1 hour or more, perform the ID

code registration procedure again from

the beginning.

●

If the vehicle is reversed during registra-

tion, the data up to that point is reset, so

perform the registration procedure again

from the beginning.

●

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.

Lexus UX250h (2023 year). Manual in english - page 20