Lexus UX 300e (2022 year). Manual in english — page 24

408

7-3. Do-it-yourself maintenance

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.

WARNING

Replacing a flat 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.

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 103 N•m (10.5

kgf•m, 76 ft•lbf) as soon as possible

after changing wheels.

• 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 any authorized Lexus

retailer or Lexus authorized repairer,

or any reliable repairer.

• Do not attach a heavily damaged

wheel ornament, as it may fly off the

wheel while the vehicle is moving.

Replacing a flat tire for vehicles with

power back door

In cases such as when replacing tires,

make sure to cancel the power back

door system (



P.193). 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.

NOTICE

Repairing or replacing tires, wheels,

tire pressure warning valves, trans-

mitters and tire valve caps



P.400

409

7-3. Do-it-yourself maintenance

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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.

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

Tightening torque:

103 N•m (10.5 kgf•m, 76 ft•lbf)

Stow all the tools.

Installing the tire

A
B

410

7-3. Do-it-yourself maintenance

Effects of incorrect tire inflation pres-

sure

Driving with incorrect tire inflation pressure

may result in the following:

Reduced electricity consumption effi-

ciency

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 any authorized Lexus retailer

or Lexus authorized repairer, or any reli-

able repairer.

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

more than 1.5 km or 1 mile, 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.

Passengers and luggage weight should

be placed so that the vehicle is balanced.

Tire inflation pressure

Make sure to maintain proper tire
inflation pressure. Tire inflation
pressure should be checked at
least once per month. However,
Lexus recommends that tire infla-
tion pressure be checked once
every two weeks.

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.

411

7-3. Do-it-yourself maintenance

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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
any authorized Lexus retailer or Lexus
authorized repairer, or any reliable
repairer.

: 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.400)



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



When rotating, repairing or chang-

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

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 any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer or

other qualified service shop. In addi-

tion, make sure to purchase your tire

pressure warning valves and transmit-

ters at any authorized Lexus retailer or

Lexus authorized repairer, or any reli-

able repairer.

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

412

7-3. Do-it-yourself maintenance

ing your tires, check that the wheel
nuts are still tight after driving 1600
km (1000 miles).



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.

Turn the power switch off.

Confirm that the charging connector is not

connected. Also, do not use the Remote

Air Conditioning System during the proce-

dure.

Open the front passenger’s door.

By keeping the door open, unexpected

operation of the Remote Air Conditioning

System can be prevent. (



P.355)

Open the glove box. Remove the
partition. (



P.365)

Remove the panel.

Air conditioning filter

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

Removing the air conditioning
filter

413

7-3. Do-it-yourself maintenance

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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 “Lexus Service Booklet”

or “Lexus Warranty Booklet”.)

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

filter.

WARNING

When replacing the air conditioning

filter

Observe the following precautions. Fail-

ure to do so may result in the air condi-

tioning system operating during the

procedure, possibly resulting in injury.

Check that the charging connector is

not connected

The air conditioning may operate due to
the air conditioning-linked setting
(



P.130) or the traction battery cooler

setting (



P.111).

Do not use the Remote Air Condition-

ing System

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.

414

7-3. Do-it-yourself maintenance

If the electronic key battery is depleted

The following symptoms may occur:

The smart entry & start system and wire-

less 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 any autho-

rized Lexus retailer or Lexus authorized

repairer, or any reliable repairer, 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

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.

Electronic key battery

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

Items to prepare

415

7-3. Do-it-yourself maintenance

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Take out the mechanical key.

Remove the cover.

Remove the battery cover.

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. Fail-

ure to do so may result in death or seri-

ous 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 any

authorized Lexus retailer or Lexus

authorized repairer, or any reliable

repairer.

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.

416

7-3. Do-it-yourself maintenance

Turn the power switch off.

Confirm that the charging connector is not

connected. Also, do not use the Remote

Air Conditioning System during the proce-

dure.

Open the fuse box cover.



Motor compartment: type A fuse
box

Push the tab in and lift the lid off.



Motor compartment: type B fuse
box

Push the tab in and lift the lid off.

WARNING

Do not expose batteries to extremely

low pressure due to high altitude or

extremely high temperatures.

Do not burn, break or cut a battery.

Certification for the electronic key

battery

CAUTION

RISK OF EXPLOSION IF BATTERY IS

REPLACED BY AN INCORRECT

TYPE.

DISPOSE OF USED BATTERIES

ACCORDING TO THE

INSTRUCTIONS.

NOTICE

When replacing the battery

Use a screwdriver of appropriate size.

Applying excessive force may deform or

damage the cover.

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

417

7-3. Do-it-yourself maintenance

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

Motor compartment: type C fuse
box

Push the tab in and lift the lid off.



Left side instrument panel (left-hand
drive vehicles)

Remove the lid.



Left side instrument panel (right-
hand drive vehicles)

Remove the cover

and then remove

the connector

Remove the lid.

Remove the fuse.

Only type A fuse can be removed using

the pullout tool.

418

7-3. Do-it-yourself maintenance

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



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.

If the replaced fuse blows again, have the

vehicle inspected by any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer.

If there is an overload in a circuit

The fuses are designed to blow, protecting

the wiring harness from damage.

A
B

419

7-3. Do-it-yourself maintenance

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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.

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

Bulbs that need to be replaced by
any authorized Lexus retailer or
Lexus authorized repairer, or any
reliable repairer



Headlights



Front position lights and daytime
running lights



Front turn signal lights (vehicles with

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 any autho-

rized Lexus retailer or Lexus authorized

repairer, or any reliable repairer as soon

as possible.

Light bulbs

You may replace the following
bulbs 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 any authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

Bulb location

420

7-3. Do-it-yourself maintenance

triple-beam headlights)



Front fog lights (if equipped)



Cornering lights (if equipped)



Side turn signal lights



Tail lights



Stop lights



Tail lights/stop lights



Rear turn signal lights



Rear fog lights



Back-up lights



High mounted stoplight



License plate 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 any

authorized Lexus retailer or Lexus autho-

rized repairer, or any reliable repairer 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 any

authorized Lexus retailer or Lexus autho-

rized repairer, or any reliable repairer 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 any authorized

Lexus retailer or Lexus authorized repairer,

or any reliable repairer for more informa-

tion 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.419

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.

421

7-3. Do-it-yourself maintenance

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WARNING

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.

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.

423

Wh
en

troubl
e ar
ises

When trouble arises

8-1. Essential information

Emergency flashers . . . . .

424

If your vehicle has to be stopped

in an emergency. . . . . .

424

If the vehicle is submerged or

water on the road is rising ..

425

8-2. Steps to take in an emergency

If your vehicle needs to be towed

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

427

If you think something is wrong

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

430

If a warning light turns on or a

warning buzzer sounds . ...

432

If a warning message is displayed

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

440

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

444

If the EV system will not start

455

If you lose your keys. . . . .

457

If the charging port lids cannot be

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

457

If the electronic key does not

operate properly . . . . .

458

If the 12-volt battery is discharged

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

461

If your vehicle overheats. .

465

If the vehicle becomes stuck

467

424

8-1. Essential information

8-1.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 EV 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 position to N.



If the shift position is shifted to N

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

Stop the EV system.



If the shift position cannot be shifted
to N

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

To stop the EV system, press and
hold the power switch for 2 con-
secutive seconds or more, or press

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

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