Lexus UX250H (2024 year). Manual in english

344

6-3. Do-it-yourself maintenance

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”.

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.

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●

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,

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-

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

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)

■

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

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6-3. Do-it-yourself maintenance

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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.



Stop the vehicle in a safe place on a
hard, flat surface.



Set the parking brake.



Shift the shift lever to P.



Stop the hybrid system.



2WD models

Towing eyelet

Replacing the tire

When replacing the tires yourself,
prepare the necessary tools and a
jack.
If necessary tire replacement
seems difficult to perform, contact
your Lexus dealer.

Before jacking up the vehicle

Location of the jack and tools

348

6-3. Do-it-yourself maintenance

Jack

/Jack handle

/Wheel nut wrench

: They can be purchased at your Lexus dealer.



AWD models

Towing eyelet

Jack

/Jack handle

/Wheel nut wrench

: They can be purchased at your Lexus dealer.

WARNING

■

Using the tire jack

Observe the following precautions.

Improper use of the tire jack may cause

the vehicle to suddenly fall off the jack,

leading to death or serious injury.

●

Do not use the tire jack for any pur-

pose other than replacing tires or

installing and removing tire chains.

●

Only use the tire jack that comes with

this vehicle for replacing a flat tire. Do

not use it on other vehicles, and do not

use other tire jacks for replacing tires

on this vehicle.

●

Put the jack properly in its jack point.

●

Do not put any part of your body under

the vehicle while it is supported by the

jack.

●

Do not start the hybrid system or drive

the vehicle while the vehicle is sup-

ported by the jack.

●

Do not raise the vehicle while some-

one is inside.

●

When raising the vehicle, do not put an

object on or under the jack.

●

Do not raise the vehicle to a height

greater than that required to replace

the tire.

●

Use a jack stand if it is necessary to get

under the vehicle.

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6-3. Do-it-yourself maintenance

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Chock the tires.

Slightly loosen the wheel nuts (one
turn).

Turn the tire jack portion

hand until the notch of the jack is in
contact with the jack point.

The jack point guides are located under

the rocker panel. They indicate the jack

point positions.

Install the wheel nut wrench in jack
handle.

Raise the vehicle until the tire is
slightly raised off the ground.

Remove all the wheel nuts and the
tire.

When resting the tire on the ground, place

the tire so that the wheel design faces up to

WARNING

●

When lowering the vehicle, make sure

that there is no-one near the vehicle. If

there are people nearby, warn them

vocally before lowering.

Removing a tire

Tire

Wheel chock positions

Front left-hand

side

Behind the rear right-

hand side tire

Front right-hand

side

Behind the rear left-

hand side tire

Rear left-hand

side

In front of the front

right-hand side tire

Rear right-hand

side

In front of the front left-

hand side tire

350

6-3. Do-it-yourself maintenance

avoid scratching the wheel surface.

Remove any dirt or foreign matter
from the wheel contact surface.

If foreign matter is on the wheel contact

surface, the wheel nuts may loosen while

the vehicle is in motion, causing the tire to

come off.

Install the tire and loosely tighten
each wheel nut by hand by approxi-
mately the same amount.

Turn the wheel nuts until the washers come

into contact with the disc wheel.

Disc wheel

Washer

Lower the vehicle.

Securely tighten the wheel nuts two
or three times in the order shown in
the illustration using a wheel nut
wrench.

WARNING

■

Replacing a tire

Do not touch the disc wheels or the area

around the brakes immediately after the

vehicle has been driven.
After the vehicle has been driven the disc

wheels and the area around the brakes

will be extremely hot. Touching these

areas with hands, feet or other body

parts while changing a tire, etc. may

result in burns.

■

Replacing a tire for vehicles with

power back door

In cases such as when replacing tires,

make sure to cancel the power back

door system (



P.125). Failure to do so

may cause the back door to operate

unintentionally if the power back door

switch is accidentally touched, resulting

in hands and fingers being caught and

injured.

Installing the tire

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6-3. Do-it-yourself maintenance

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Tightening torque:
76 ft•lbf (103 N•m, 10.5 kgf•m)

Stow the tire jack and all tools.

WARNING

■

When installing the tire

Failure to follow these precautions could

cause the wheel nuts to loosen and the

tire to fall off, resulting in death or serious

injury.

●

Never use oil or grease on the wheel

bolts or wheel nuts.

Oil and grease may cause the wheel

nuts to be excessively tightened, lead-

ing to bolt or disc wheel damage.

Remove any oil or grease that has

adhered when installing the wheel

nuts.

●

Have the wheel nuts tightened with a

torque wrench to 76 ft•lbf (103 N•m,

10.5 kgf•m) as soon as possible after

changing wheels.

●

After replacing a tire, check the tight-

ening torque as soon as possible. If you

cannot confirm the tightening torque

yourself, have the vehicle inspected at

your Lexus dealer.

●

Do not attach a heavily damaged

wheel ornament, as it may fly off the

wheel while the vehicle is moving.

●

When installing a tire, only use wheel

nuts that have been specifically

designed for that wheel.

●

If there are any cracks or deformations

in the bolt screws, nut threads or bolt

holes of the wheel, have the vehicle

inspected by your Lexus dealer.

●

Do not attach a heavily damaged

wheel ornament, as it may fly off the

wheel while the vehicle is moving.

■

After using the tools and jack (if

equipped)

Before driving, make sure all the tools

and jack are stored securely in place.

Failure to do so may cause injury in case

of a collision or sudden braking.

NOTICE

■

Repairing or replacing tires, wheels,

tire pressure warning valves, trans-

mitters and tire valve caps



P.343

352

6-3. Do-it-yourself maintenance

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



P.414)

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
pressure.
If you add too much air, press the
center of the valve to deflate.

After completing the tire inflation
pressure measurement and adjust-
ment, apply soapy water to the
valve and check for leakage.

Put the tire valve cap back on.

■

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 pres-

sure

Driving with incorrect tire inflation pressure

may result in the following:

●

Reduced fuel economy

●

Reduced driving comfort and poor han-

dling

●

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 or has not been driven for

Tire inflation pressure

Checking the specified tire infla-
tion pressure

Inspection and adjustment pro-
cedure

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6-3. Do-it-yourself maintenance

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more than 1 mile or 1.5 km, you will get an

accurate cold tire inflation pressure read-

ing.

●

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 gener-

ated in the tire. Do not reduce tire infla-

tion pressure after driving.

●

Never exceed the vehicle capacity

weight.

Passengers and luggage weight should

be placed so that the vehicle is balanced.

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 dam-

age

●

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 mois-

ture may get into the valve and cause an

air leak, resulting in decreased tire infla-

tion pressure.

354

6-3. Do-it-yourself maintenance

When replacing wheels, care should
be taken to ensure that they are equiv-
alent to those removed in load capac-
ity, 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

■

When replacing wheels

The wheels of your vehicle are equipped

with tire pressure warning valves and trans-

mitters 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 pres-

sure warning valves and transmitters must

be installed. (



P.343)



Use only Lexus wheel nuts and
wrenches designed for use with
your aluminum wheels.



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



Be careful not to damage the alumi-
num wheels when using tire chains.



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

Wheels

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

Wheel selection

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 acci-

dent, 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 acci-

dent.

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-genuine wheels.

Aluminum wheel precautions

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6-3. Do-it-yourself maintenance

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Turn the power switch off.

Open the glove box. Remove the
partition. (



P.289)

Remove the panel.

Unlock the filter cover (

), pull

the filter cover out of the claws
(

), and remove the filter cover.

Remove the filter case.

Remove the air conditioning filter
from the filter case and replace it
with a new one.

The “

UP” marks shown on the filter and

the filter case should be pointing up.

■

Checking interval

Inspect and replace the air conditioning fil-

ter 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 Sup-

plement” or “Scheduled Maintenance”.)

■

If air flow from the vents decreases dra-

matically

The filter may be clogged. Check the filter

and replace if necessary.

■

Air conditioning filter with deodorizing

function

When fragrances are placed in your vehi-

cle, the deodorizing effect may become sig-

nificantly weakened in a short period.

When an air conditioning odor comes out

continuously, replace the air conditioning

Air conditioning filter

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

Removing the air conditioning
filter

356

6-3. Do-it-yourself maintenance

filter.

■

Scheduled maintenance of the air

intake vent is necessary when

In some situations such as when the vehicle

is used frequently or in heavy traffic or dusty

areas, the air intake vent may need to be

cleaned more regularly. For details, refer to

the “Warranty and Service Guide”,

“Owner’s Manual Supplement” or “Sched-

uled Maintenance”.

■

Cleaning the air intake vent

Improper handling of the air intake vent

cover and filter may result in damage to

them. If you have any concerns about clean-

ing the filter, contact your Lexus dealer.

NOTICE

■

When using the air conditioning sys-

tem

Make sure that a filter is always installed.

Using the air conditioning system with-

out a filter may cause damage to the sys-

tem.

■

To prevent damage to the filter cover

When moving the filter cover in the

direction of arrow to release the fitting,

pay attention not to apply excessive

force to the claws. Otherwise, the claws

may be damaged.

Cleaning the hybrid battery
(traction battery) air intake
vent

To prevent the fuel economy from
being affected, visually inspect the
hybrid battery (traction battery) air
intake vent periodically for clogs.
If it is dusty or clogged or if “Main-
tenance required for Traction bat-
tery cooling parts See owner’s
manual” is displayed on the multi-
information display, clean the air
intake vent using the following pro-
cedures:

NOTICE

■

If “Maintenance required for Trac-

tion battery cooling parts See

owner’s manual” is displayed on the

multi-information display

Clean the air intake vent immediately.
If the vehicle is continuously driven with

the warning message displayed, it may

cause a malfunction or output restriction

of the hybrid battery (traction battery).

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6-3. Do-it-yourself maintenance

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Turn the power switch off.

Using a Phillips screwdriver,
remove the clip.

Remove the air intake vent cover.

Pull the cover as shown in the illus-
tration to disengage the 5 claws,
starting from the claw in the upper
right corner.

Pull the cover toward the front of
the vehicle to remove it.

Remove the filter from the air
intake vent cover.

If dust has accumulated on the air intake

vent cover, remove the dust with a vacuum

cleaner, etc.

Disengage the 1 claw as shown in
the illustration.

Remove the filter from the cover.

Remove the dust and sand from the
filter.

Using a vacuum cleaner, etc., absorb dust

and sand from the filter by profiling the

nozzle lightly along the fold.

Hold the filter to the light and check
if it is not clogged.

If the dust or sand cannot be removed

completely, contact your Lexus dealer.

Cleaning procedure

358

6-3. Do-it-yourself maintenance

Reinstall the filter to the cover.

Engage the filter to the 2 claws as
shown in the illustration.

Engage the 1 claw to install the fil-
ter.

Make sure that the filter is not crooked or
deformed when installing it.

Install the air intake vent cover.

Insert the tab of the cover as shown
in the illustration.

Push the cover to engage the 5
claws.

Install the clip.



If “Maintenance required for Trac-
tion battery cooling parts See
owner’s manual” is displayed on the
multi-information display

Start the hybrid system and check
that the warning message is no lon-
ger displayed.

It may be necessary to drive the vehicle for

approximately 20 minutes before the

warning message is displayed again then

disappears.
If the warning message does not disappear

after some time, have the vehicle inspected

by your Lexus dealer.

■

If the dust or sand on the filter cannot be

removed

It is recommended to use a vacuum cleaner

with plastic brushes.

WARNING

■

When cleaning the air intake vent

●

Do not use water or other liquids to

clean the air intake vent. If water is

applied to the hybrid battery (traction

battery) or other components, a mal-

function or fire may occur.

●

Do not touch the service plug located

near the air intake vent. (



P.64)

●

Before cleaning the air intake vent,

make sure to turn the power switch off

to stop the hybrid system.

●

Do not put a hand or leg in the air

intake vent. If it is caught in a cooling

fan, or if it touches a high voltage part

that results in an electric shock, death

or serious injuries may result.

359

6-3. Do-it-yourself maintenance

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■

If the electronic key battery is depleted

The following symptoms may occur:

●

The smart access system with push-but-

ton start and wireless remote control will

not function properly.

●

The operational range will be reduced.

■

When the card key battery needs to be

replaced (if equipped)

The battery for the card key is available only

at Lexus dealers. Your Lexus dealer can

replace the battery for you.

Prepare the following before replacing
the battery:



Flathead screwdriver



Small flathead screwdriver



Lithium battery CR2032

■

Use a CR2032 lithium battery

●

Batteries can be purchased at your Lexus

dealer, local electrical appliance shops or

camera stores.

●

Replace only with the same or equivalent

type recommended by the manufacturer.

●

Dispose of used batteries according to

the local laws.

NOTICE

■

When cleaning the air intake vent

Do not use an air blow gun, etc.
Dust may be blown out, possibly causing

a malfunction or output restriction of the

hybrid battery (traction battery).

■

To prevent damage to the vehicle

Observe the following precautions:

●

Do not allow water or foreign matter

to enter the air intake vent.

●

Make sure to reinstall the filter and

cover to their original positions after

cleaning.

●

Do not install anything to the air intake

vent other than the exclusive filter for

this vehicle or use the vehicle without

the filter installed.

■

To prevent damage to the filter

Observe the following precautions.
If the filter is damaged, have it replaced

with a new filter by your Lexus dealer.

●

Do not use an air blow gun, etc.

●

Do not press hard a vacuum cleaner,

etc. against the filter.

●

Do not use a hard brush, such as a

metal brush.

●

Do not break the fold of the filter.

Electronic key battery

Replace the battery with a new one
if it is depleted.

Items to prepare

360

6-3. Do-it-yourself maintenance

Take out the mechanical key.

Remove the cover.

To prevent damage to the key, cover the

tip of the flathead screwdriver with a tape.

Remove the depleted battery using
the small flathead screwdriver.

Insert a new battery with the “+” terminal

facing up.

Replacing the battery

WARNING

■

Battery precautions

Observe the following precautions.
Failure to do so may result in death or

serious injury.

●

Do not swallow the battery. Doing so

may cause chemical burns.

●

A coin battery or button battery is

used in the electronic key. If a battery

is swallowed, it may cause severe

chemical burns in as little as 2 hours

and may result in death or serious

injury.

●

Keep away new and removed batter-

ies from children.

●

If the cover cannot be firmly closed,

stop using the electronic key and stow

the key in the place where children

cannot reach, and then contact your

Lexus dealer.

●

If you accidentally swallow a battery or

put a battery into a part of your body,

get emergency medical attention

immediately.

■

To prevent battery explosion or leak-

age of flammable liquid or gas

●

Replace the battery with a new battery

of the same type. If a wrong type of

battery is used, it may explode.

●

Do not expose batteries to extremely

low pressure due to high altitude or

extremely high temperatures.

●

Do not burn, break or cut a battery.

NOTICE

■

When replacing the battery

Use a screwdriver of appropriate size.

Applying excessive force may deform or

damage the cover.

361

6-3. Do-it-yourself maintenance

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Turn the power switch off.

Open the fuse box cover.



Engine compartment: type A fuse
box

Push the tab in and lift the lid off.



Engine compartment: type B fuse
box

Push the tab in and lift the lid off.



Left side instrument panel

Remove the lid.

NOTICE

■

For normal operation after replacing

the battery

Observe the following precautions to

prevent accidents:

●

Always work with dry hands.

Moisture may cause the battery to

rust.

●

Do not touch or move any other com-

ponent inside the remote control.

●

Do not bend either of the battery ter-

minals.

Checking and replacing
fuses

If any of the electrical components
do not operate, a fuse may have
blown. If this happens, check and
replace the fuses as necessary.

Checking and replacing fuses

362

6-3. Do-it-yourself maintenance



Luggage compartment

Remove the 12-volt battery cover
(



P.338) and push the tab in and lift the

lid off.

Remove the fuse.

Only type A fuse can be removed using

the pullout tool.

Check if the fuse is blown.

Replace the blown fuse with a new fuse of

an appropriate amperage rating. The

amperage rating can be found on the fuse

box lid.



Type A

Normal fuse

Blown fuse



Type B

Normal fuse

Blown fuse



Type C

Normal fuse

Blown fuse

A
B

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6-3. Do-it-yourself maintenance

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

Type D

Normal fuse

Blown fuse

■

After a fuse is replaced

●

When installing the lid, make sure that the

tab is installed securely.

●

If the lights do not turn on even after the

fuse has been replaced, a bulb may need

replacement. (



P.365)

●

If the replaced fuse blows again, have the

vehicle inspected by your Lexus dealer.

■

If there is an overload in a circuit

The fuses are designed to blow, protecting

the wiring harness from damage.

■

When replacing light bulbs

Lexus recommends that you use genuine

Lexus products designed for this vehicle.

Because certain bulbs are connected to cir-

cuits designed to prevent overload, non-

genuine parts or parts not designed for this

vehicle may be unusable.

WARNING

■

To prevent system breakdowns and

vehicle fire

Observe the following precautions.

Failure to do so may cause damage to

the vehicle, and possibly a fire or injury.

●

Never use a fuse of a higher amperage

rating than that indicated, or use any

other object in place of a fuse.

●

Always use a genuine Lexus fuse or

equivalent.

Never replace a fuse with a wire, even

as a temporary fix.

●

Do not modify the fuses or fuse boxes.

■

Fuse box near the power control unit

Never check or replace the fuses as

there are high voltage parts and wiring

near the fuse box.

Doing so may cause electric shock,

resulting in death or serious injury.

NOTICE

■

Before replacing fuses

Have the cause of electrical overload

determined and repaired by your Lexus

dealer as soon as possible.

364

6-3. Do-it-yourself maintenance



Single-beam headlights

Adjustment bolt A

Adjustment bolt B



Triple-beam headlights

Adjustment bolt A

Adjustment bolt B



Make sure the vehicle has a full tank
of gasoline and the area around the
headlight is not deformed.



Park the vehicle on level ground.



Make sure the tire inflation pressure

is at the specified level.



Have someone sit in the driver’s
seat.



Bounce the vehicle several times.

Using a Phillips-head screwdriver,
turn bolt A in either direction.
Remember the turning direction
and the number of turns.



Single-beam headlights



Triple-beam headlights

Turn bolt B the same number of
turns and in the same direction as
step

If the headlight cannot be adjusted using

this procedure, take the vehicle to your

Lexus dealer to adjust the headlight aim.

Headlight aim

Vertical movement adjusting
bolts

Before checking the headlight
aim

A
B

Adjusting the headlight aim

365

6-3. Do-it-yourself maintenance

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

Single-beam headlights



Triple-beam headlights

Front turn signal light (vehicles with
single-beam headlights)

■

Bulbs that need to be replaced by
your Lexus dealer



Headlights



Parking lights and daytime running
lights



Front turn signal lights (vehicles with
triple-beam headlights)



Fog lights (if equipped)



Cornering lights (if equipped)



Side turn signal lights

Light bulbs

You may replace the following bulb
by yourself. Before replacing,
check the wattage of the light bulb
to be replaced. As there is a danger
that components may be damaged,
we recommend that replacement is
carried out by your Lexus dealer.

Bulb location

366

6-3. Do-it-yourself maintenance



Tail lights



Stop lights



Tail lights/stop lights



Rear turn signal lights



Back-up lights



High mounted stoplight



License plate lights



Side marker lights

■

LED lights

Vehicles with single-beam headlights:
The lights other than the front turn signal

light each consist of a number of LEDs. If

any of the LEDs burn out, take your vehicle

to your Lexus dealer to have the light

replaced.
Vehicles with triple-beam headlights:
The lights consist of a number of LEDs. If

any of the LEDs burn out, take your vehicle

to your Lexus dealer to have the light

replaced.

■

Condensation build-up on the inside of

the lens

Temporary condensation build-up on the

inside of the headlight lens does not indi-

cate a malfunction. Contact your Lexus

dealer for more information in the following

situations:

●

Large drops of water have built up on the

inside of the lens.

●

Water has built up inside the headlight.

■

When replacing light bulbs



P.363

■

Front turn signal lights (vehicles
with single-beam headlights)

Turn the bulb base counterclock-
wise.

Remove the light bulb.

When installing, reverse the steps
listed.

Replacing light bulb

WARNING

■

Replacing light bulb

●

Turn off the light. Do not attempt to

replace the bulb immediately after

turning off the light.

The bulb become very hot and may

cause burns.

●

Do not touch the glass portion of the

light bulb with bare hands. When it is

unavoidable to hold the glass portion,

use and hold with a clean dry cloth to

avoid getting moisture and oils on the

bulb.

Also, if the bulb is scratched or

dropped, it may blow out or crack.

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6-3. Do-it-yourself maintenance

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WARNING

●

Fully install light bulb and any parts

used to secure it. Failure to do so may

result in heat damage, fire, or water

entering the light unit. This may dam-

age the light or cause condensation to

build up on the lens.

■

To prevent damage or fire

●

Make sure bulb is fully seated and

locked.

●

Check the wattage of the bulb before

installing to prevent heat damage.

369

When trouble

ari

ses

When trouble arises

7-1. Essential information

Emergency flashers..................

370

If your vehicle has to be stopped

in an emergency.....................

370

If the vehicle is submerged or

water on the road is rising ...

371

7-2. Steps to take in an emergency

If your vehicle needs to be towed

........................................................

373

If you think something is wrong

........................................................

377

If a warning light turns on or a

warning buzzer sounds .......

378

If a warning message is displayed

........................................................

387

If you have a flat tire..................

392

If the hybrid system will not start

........................................................

393

If you lose your keys.................

394

If the fuel filler door cannot be

opened........................................

395

If the electronic key does not

operate properly ....................

396

If the 12-volt battery is discharged

........................................................

398

If your vehicle overheats ........

402

If the vehicle becomes stuck

405

370

7-1. Essential information

7-1.Essential information

Press the switch.

All the turn signal lights will flash. To turn
them off, press the switch once again.

■

Emergency flashers

●

If the emergency flashers are used for a

long time while the hybrid system is not

operating (while the “READY” indicator

is not illuminated), the 12-volt battery may

discharge.

●

If any of the SRS airbags deploy (inflate)

or in the event of a strong rear impact, the

emergency flashers will turn on automati-

cally. The emergency flashers will turn off

automatically after operating for approxi-

mately 20 minutes. To manually turn the

emergency flashers off, press the switch

twice. (The emergency flashers may not

turn on automatically depending on the

force of the impact and conditions of the

collision.)

Steadily step on the brake pedal
with both feet and firmly depress it.

Do not pump the brake pedal repeatedly

as this will increase the effort required to

slow the vehicle.

Shift the shift lever to N.



If the shift lever is shifted to N

After slowing down, stop the vehi-
cle in a safe place by the road.

Stop the hybrid system.



If the shift lever cannot be shifted to
N

Keep depressing the brake pedal
with both feet to reduce vehicle
speed as much as possible.

To stop the hybrid system, press
and hold the power switch for 2
consecutive seconds or more, or

Emergency flashers

The emergency flashers are used to
warn other drivers when the vehi-
cle has to be stopped in the road
due to a breakdown, etc.

Operating instructions

If your vehicle has to be
stopped in an emergency

Only in an emergency, such as if it
becomes impossible to stop the
vehicle in the normal way, stop the
vehicle using the following proce-
dure:

Stopping the vehicle

371

7-1. Essential information

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press it briefly 3 times or more in
succession.

Stop the vehicle in a safe place by
the road.



If the door can be opened, open the
door and exit the vehicle.



If the door cannot be opened, open
the window using the power win-
dow switch and ensure an escape
route.



If the window can be opened, exit
the vehicle through the window.



If the door and window cannot be
opened due to the rising water,
remain calm, wait until the water
level inside the vehicle rises to the
point that the water pressure inside
of the vehicle equals the water pres-
sure outside of the vehicle and then
open the door after waiting for the
rising water to enter the vehicle, and
exit the vehicle.

When the outside water level exceeds half
the height of the door, the door cannot be
opened from the inside due to water pres-
sure.

■

Water level exceeds the floor

When the water level exceeds the floor and

time has passed, the electrical equipment

WARNING

■

If the hybrid system has to be turned

off while driving

Power assist for the steering wheel will

be lost, making the steering wheel

heavier to turn. Decelerate as much as

possible before turning off the hybrid

system.

If the vehicle is submerged
or water on the road is rising

This vehicle is not designed to be
able to drive on roads that are
deeply flooded with water. Do not
drive on roads where the roads may
be submerged or the water may be
rising. It is dangerous to remain in
the vehicle, if it is anticipated that
the vehicle will be flooded or set
adrift. Remain calm and follow the
following.

372

7-1. Essential information

will get damaged, the power windows will

not operate, the engine and motor stop, and

the vehicle may not be able to get moving.

■

Using an emergency escape hammer

Laminated glass

is used in the windshield

and front side windows on this vehicle.

Laminated glass cannot be shattered with
an emergency hammer

: Contact your Lexus dealer or aftermar-

ket accessory manufacturer for further
information about an emergency ham-
mer.

: If equipped

■

How to distinguish laminated glass

When looking from the cross-sectional

view point, laminated glass is two sheets of

glass pasted together.

Laminated glass

Tempered glass

WARNING

■

Caution while driving

Do not drive on roads where the roads

may be submerged or the water may be

rising. Otherwise the vehicle may be

damaged and cannot move, as well as

become flooded and set adrift, which

may lead to death.

373

7-2. Steps to take in an emergency

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7-2.Steps to take in an emergency

The following may indicate a problem
with your transmission. Contact your
Lexus dealer or commercial towing
service before towing.



The hybrid system warning message
is shown on the multi-information
display and the vehicle does not
move.



The vehicle makes an abnormal
sound.



From the front (2WD models)

Release the parking brake.
Turn automatic mode off. (



P.175)



From the front (AWD models)

Use a towing dolly under the rear
wheels.



From the rear

Use a towing dolly under the front
wheels.

If your vehicle needs to be
towed

If towing is necessary, we recom-
mend having your vehicle towed by
your Lexus dealer or commercial
towing service, using a wheel-lift
type truck or flatbed truck.
Use a safety chain system for all
towing, and abide by all state/pro-
vincial and local laws.

Situations when it is necessary to
contact dealers before towing

Towing with a wheel-lift type
truck

WARNING

Observe the following precautions.

Failure to do so may result in death or

serious injury.

374

7-2. Steps to take in an emergency

WARNING

■

When towing the vehicle



2WD models

Be sure to transport the vehicle with the
front wheels raised or with all four wheels
raised off the ground. If the vehicle is
towed with the front wheels contacting
the ground, the drivetrain and related
parts may be damaged or electricity
generated by the operation of the motor
may cause a fire to occur depending on
the nature of the damage or malfunction.



AWD models

Be sure to transport the vehicle with all
four wheels raised off the ground. If the
vehicle is towed with the tires contacting
the ground, the drivetrain or related
parts may be damaged, the vehicle may
fly off the truck, or electricity generated
by the operation of the motor may cause
a fire to occur depending on the nature
of the damage or malfunction.

NOTICE

■

To prevent damage to the vehicle

when towing using a wheel-lift type

truck

When raising the vehicle, ensure ade-

quate ground clearance for towing at the

opposite end of the raised vehicle. With-

out adequate clearance, the vehicle

could be damaged while being towed.

375

7-2. Steps to take in an emergency

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When using a flat-bed truck to trans-
port the vehicle, use tire strapping
belts. Refer to the owner’s manual of
the flat-bed truck for the tire strapping
method.
In order to suppress vehicle movement
during transportation, set the parking
brake and turn the power switch off.

If a tow truck is not available in an
emergency, your vehicle may be tem-
porarily towed using cables or chains
secured to the emergency towing eye-
let. This should only be attempted on
hard surfaced roads for short distances
at under 18 mph (30 km/h).
A driver must be in the vehicle to steer
and operate the brakes. The vehicle’s
wheels, drivetrain, axles, steering and
brakes must be in good condition.

To have your vehicle towed by another

vehicle, the towing eyelet must be
installed to your vehicle. Install the tow-
ing eyelet using the following proce-
dure.

Take out the towing eyelet.
(



P.291, 347)

Remove the eyelet cover using a
flathead screwdriver.

To protect the bodywork, place a rag

between the screwdriver and the vehicle

body as shown in the illustration.

Insert the towing eyelet into the
hole and tighten partially by hand.

NOTICE

■

Towing with a sling-type truck

Do not tow with a sling-type truck to pre-

vent body damage.

Using a flatbed truck

Emergency towing

Emergency towing procedure

Lexus UX250H (2024 year). Manual in english - page 11