Lexus UX (2022 year). Manual in english — page 22

386

6-3. Do-it-yourself maintenance

displayed, have the vehicle inspected by

any authorized Lexus retailer or Lexus

authorized repairer, or any reliable

repairer.

The tire pressure warning valve and
transmitter is equipped with a unique
ID code. When replacing a tire pres-
sure warning valve and transmitter, it is
necessary to register the ID code.
When registering the ID codes, per-
form the following procedure.

1

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



P.184)

2

Press

or

of the meter con-

trol switches and select

.

3

Press

or

of the meter con-

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

4

Press

or

of the meter con-

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

5

Press

or

of the meter con-

trol switches and select “Change
Wheel Set”, and then press and
hold “OK” until the tire pressure
warning light starts slowly blinking
3 times.

The change wheel set mode is activated

and registration is started.
A message is displayed on the multi-infor-

mation display, and “--” is displayed for

inflation pressure of each tire. Then, the tire

pressure warning light blinks rapidly for

approximately 1 minute and stays on.

6

Drive at approximately 40 km/h
(25 mph) 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 40 km/h (25 mph) 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.

7

Initialize the tire pressure warning
system. (



P.384)

Q

When registering ID codes

O

ID code registration is performed while

driving at a vehicle speed of approxi-

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

WARNING

Q

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

387

6

6-3. Do-it-yourself maintenance

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O

Before performing ID code registration,

make sure that no wheels with tire pres-

sure warning valve and transmitters

installed are near the vehicle.

O

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.

O

ID codes can be registered by yourself,

but depending on the driving conditions

and driving environment, registration

may take some time to complete.

Q

Canceling ID code registration

O

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 registration is

started, to cancel registration, perform

the ID code registration start procedure

again and turn the power switch off

before driving.

O

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.

O

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.

Q

If ID codes are not registered properly

O

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 40

km/h (25 mph) 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 driv-
ing for 1 hour or more, perform the ID code
registration procedure again from the
beginning.

O

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.

O

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.

O

If ID code registration cannot be com-

pleted after performing the above proce-

dure, contact any authorized Lexus

retailer or Lexus authorized repairer, or

any reliable repairer.

388

6-3. Do-it-yourself maintenance

Q

Effects of incorrect tire inflation pres-

sure

Driving with incorrect tire inflation pressure

may result in the following:

O

Reduced fuel economy

O

Reduced driving comfort and poor han-

dling

O

Reduced tire life due to wear

O

Reduced safety

O

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.

Q

Instructions for checking tire inflation

pressure

When checking tire inflation pressure,

observe the following:

O

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.

O

Always use a tire pressure gauge.

It is difficult to judge if a tire is properly

inflated based only on its appearance.

O

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.

O

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

Q

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:

O

Excessive wear

O

Uneven wear

O

Poor handling

O

Possibility of blowouts resulting from

overheated tires

O

Air leaking from between tire and

wheel

O

Wheel deformation and/or tire dam-

age

O

Greater possibility of tire damage

while driving (due to road hazards,

expansion joints, sharp edges in the

road, etc.)

NOTICE

Q

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.

389

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6-3. 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

Q

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.383)



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

Q

When replacing wheels

O

Do not use wheels that are a different

size from those recommended in the

loss of handling control.

O

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.

Q

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

Q

Replacing tire pressure warning

valves and transmitters

O

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.

O

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

390

6-3. 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.

1

Turn the power switch off.

2

Open the glove box. Remove the
partition. (



P.342)

3

Remove the panel.

4

Unlock the filter cover (

), pull

the filter cover out of the claws
(

), and remove the filter cover.

Air conditioning filter

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

Removing the air conditioning
filter

A

B

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6-3. Do-it-yourself maintenance

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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.

Q

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”.)

Q

If air flow from the vents decreases dra-

matically

The filter may be clogged. Check the filter

and replace if necessary.

Q

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.

NOTICE

Q

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.

Q

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.

392

6-3. Do-it-yourself maintenance

Remove the dust from the air intake
vent with a vacuum cleaner etc.

Make sure to only use a vacuum to suck
out dust and clogs. Attempting to blow out
dust and clogs using an airgun etc. may
push it into the air intake vent.

If dust and clogs cannot be completely
removed with the air intake vent cover

installed, remove the cover and clean
the filter.

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.

Cleaning the hybrid battery
(traction battery) air intake
vent and filter

To prevent the fuel economy from
being affected, visually inspect the
hybrid battery (traction battery) air
intake vent periodically for dust and
clogs. If it is dusty or clogged or if
“Maintenance required for Trac-
tion battery cooling parts See
owner’s manual” is shown on the
multi-information display, clean the
air intake vent using the following
procedures:

Cleaning the air intake vent

If dust and clogs cannot be com-
pletely removed

393

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6-3. Do-it-yourself maintenance

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4

Remove the air intake vent filter.

1

Disengage the 1 claw as shown in
the illustration.

2

Remove the filter from the cover.

5

Remove the dust and clogs from
the filter using a vacuum cleaner
etc.

Make sure to also remove the dust and

clogs from the inside of the air intake vent

cover.

6

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.

7

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.

8

Using a Phillips screwdriver, install
the clip.

Q

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 “Lexus Service Booklet” or “Lexus War-

ranty Booklet”.

Q

Cleaning the air intake vent

O

Dust in the air intake vent may interfere

with the cooling of the hybrid battery

394

6-3. Do-it-yourself maintenance

(traction battery). If charging/discharg-

ing of the hybrid battery (traction battery)

becomes limited, the distance that the

vehicle can be driven using the electric

motor (traction motor) may be reduced

and the fuel economy may be reduced.

Inspect and clean the air intake vent peri-

odically.

O

Improper handling of the air intake vent

cover and filter may result in damage to

them. If you have any concerns about

cleaning the filter, contact any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer.

Q

If “Maintenance required for Traction

battery cooling parts See owner’s man-

ual” is shown on the multi-information

display

O

If this warning message is shown on the

multi-information display, remove the air

intake vent cover and clean the filter.

(



P.392)

O

After cleaning the air intake vent, start

the hybrid system and check that the

warning message is no longer shown. It

may take approximately 20 minutes after

the hybrid system is started until the

warning message disappears. If the warn-

ing message does not disappear, have

the vehicle inspected by any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer.

WARNING

Q

When cleaning the air intake vent

O

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.

O

Before cleaning the air intake vent,

make sure to turn the power switch off

to stop the hybrid system.

Q

When removing the air intake vent

cover

Do not touch the service plug located

near the air intake vent. (



P.82)

NOTICE

Q

When cleaning the air intake vent

When cleaning the air intake vent, make

sure to only use a vacuum to suck out

dust and clogs. If a compressed air blow

gun, etc. is used to blow out dust and

clogs, the dust or clogs may be pushed

into the air intake vent, which may affect

the performance of the hybrid battery

(traction battery) and cause a malfunc-

tion.

Q

To prevent damage to the vehicle

O

Do not allow water or foreign matter

to enter the air intake vent when the

cover is removed.

O

Carefully handle the removed filter so

that it will not be damaged. If the filter

is damaged, have it replaced with a

new filter by any authorized Lexus

retailer or Lexus authorized repairer,

or any reliable repairer.

O

Make sure to reinstall the filter and

cover to their original positions after

cleaning.

O

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.

395

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6-3. Do-it-yourself maintenance

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Q

If the electronic key battery is depleted

The following symptoms may occur:

O

The smart entry & start system and wire-

less remote control will not function

properly.

O

The operational range will be reduced.

Q

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

Q

Use a CR2032 lithium battery

O

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.

O

Replace only with the same or equivalent

type recommended by the manufacturer.

O

Dispose of used batteries according to

the local laws.

NOTICE

Q

If “Maintenance required for Trac-

tion battery cooling parts See

owner’s manual” is shown on the

multi-information display

If the vehicle is continuously driven with

the warning message (indicating that

charging/discharging of the hybrid bat-

tery [traction battery] may become lim-

ited) displayed, the hybrid battery

(traction battery) may malfunction. If the

warning message is shown, clean the air

intake vent immediately.

Electronic key battery

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

Items to prepare

396

6-3. Do-it-yourself maintenance

1

Take out the mechanical key.

2

Remove the cover.

3

Remove the battery cover.

4

Remove the depleted battery using
the small flathead screwdriver.

Insert a new battery with the “+” terminal

facing up.

Replacing the battery

WARNING

Q

Battery precautions

Observe the following precautions.

Failure to do so may result in death or

serious injury.

O

Do not swallow the battery. Doing so

may cause chemical burns.

O

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.

O

Keep away new and removed batter-

ies from children.

O

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.

O

If you accidentally swallow a battery or

put a battery into a part of your body,

get emergency medical attention

immediately.

Q

To prevent battery explosion or leak-

age of flammable liquid or gas

O

Replace the battery with a new battery

of the same type. If a wrong type of

battery is used, it may explode.

397

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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.

WARNING

O

Do not expose batteries to extremely

low pressure due to high altitude or

extremely high temperatures.

O

Do not burn, break or cut a battery.

Q

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

Q

When replacing the battery

Use a screwdriver of appropriate size.

Applying excessive force may deform or

damage the cover.

Q

For normal operation after replacing

the battery

Observe the following precautions to

prevent accidents:

O

Always work with dry hands.

Moisture may cause the battery to

rust.

O

Do not touch or move any other com-

ponent inside the remote control.

O

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

398

6-3. Do-it-yourself maintenance



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.



Luggage compartment

Remove the 12-volt battery cover
(



P.378) 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.

A

B

399

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6-3. Do-it-yourself maintenance

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

Type A

Normal fuse

Blown fuse



Type B

Normal fuse

Blown fuse



Type C

Normal fuse

Blown fuse



Type D

Normal fuse

Blown fuse

Q

After a fuse is replaced

O

When installing the lid, make sure that the

tab is installed securely.

O

If the lights do not turn on even after the

fuse has been replaced, a bulb may need

replacement.

O

If the replaced fuse blows again, have the

vehicle inspected by any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer.

Q

If there is an overload in a circuit

The fuses are designed to blow, protecting

the wiring harness from damage.

Q

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.

A
B

A
B

A
B

A
B

400

6-3. Do-it-yourself maintenance

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

Q

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

Q

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.

O

Never use a fuse of a higher amperage

rating than that indicated, or use any

other object in place of a fuse.

O

Always use a genuine Lexus fuse or

equivalent.

Never replace a fuse with a wire, even

as a temporary fix.

O

Do not modify the fuses or fuse boxes.

Q

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

Q

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

A

401

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6-3. Do-it-yourself maintenance

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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

Q

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.

Q

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:

O

Large drops of water have built up on the

inside of the lens.

O

Water has built up inside the headlight.

Q

When replacing light bulbs



P.399

Q

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

1

Turn the bulb base counterclock-
wise.

2

Remove the light bulb.

3

When installing, reverse the steps
listed.

Replacing light bulb

WARNING

Q

Replacing light bulb

O

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.