Lexus UX250h (2023 year). Manual in english — page 21

347

6-3. Do-it-yourself maintenance

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

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

Jack

*

/Jack handle

*

/Wheel nut wrench

*

*

: They can be purchased at your Lexus dealer.

Replacing the tire

When raising your vehicle with a
jack, position the jack correctly.
Improper placement may damage
your vehicle or cause injury.
If necessary tire replacement
seems difficult to perform, contact
your Lexus dealer.

Before jacking up the vehicle

Location of the jack and tools

A
B

348

6-3. Do-it-yourself maintenance



AWD models

Towing eyelet

Jack

*

/Jack handle

*

/Wheel nut wrench

*

*

: They can be purchased at your Lexus dealer.

A
B

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.

●

When lowering the vehicle, make sure

that there is no-one near the vehicle. If

there are people nearby, warn them

vocally before lowering.

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6-3. Do-it-yourself maintenance

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1

Chock the tires.

2

Slightly loosen the wheel nuts (one
turn).

3

Turn the tire jack portion

by

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.

4

Install the wheel nut wrench in jack
handle.

5

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

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

A

350

6-3. Do-it-yourself maintenance

6

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

avoid scratching the wheel surface.

1

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.

2

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

3

Lower the vehicle.

4

Firmly tighten each wheel nut two
or three times in the order shown in
the illustration.

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

A
B

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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)

5

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. In

addition, the oil or grease can cause

the wheel nuts to loosen and the wheel

may fall off, causing a serious accident.

Remove any oil or grease from the

wheel bolts or 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.

●

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

1

Remove the tire valve cap.

2

Press the tip of the tire pressure
gauge onto the tire valve.

3

Read the pressure using the gauge
gradations.

4

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.

5

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

6

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

A

B

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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.342)



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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1

Turn the power switch off.

2

Open the glove box. Remove the
partition. (



P.289)

3

Remove the panel.

4

Unlock the filter cover (

), pull

the filter cover out of the claws
(

), and remove the filter cover.

5

Remove the filter case.

6

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,

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

A

B

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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1

Turn the power switch off.

2

Using a Phillips screwdriver,
remove the clip.

3

Remove the air intake vent cover.

1

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

2

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

4

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.

1

Disengage the 1 claw as shown in
the illustration.

2

Remove the filter from the cover.

5

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.

6

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

7

Reinstall the filter to the cover.

1

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

2

Engage the 1 claw to install the fil-
ter.

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

8

Install the air intake vent cover.

1

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

2

Push the cover to engage the 5
claws.

9

Install the clip.



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

10

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

1

Take out the mechanical key.

2

Remove the cover.

To prevent damage to the key, cover the

tip of the flathead screwdriver with a tape.

3

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.

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6-3. Do-it-yourself maintenance

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1

Turn the power switch off.

2

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.

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



Left side instrument panel

Remove the lid.



Luggage compartment

Remove the 12-volt battery cover
(



P.337) and push the tab in and lift the

lid off.

3

Remove the fuse.

Only type A fuse can be removed using

the pullout tool.

4

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

A
B

A
B