Lexus UX 300e (2023 year). Manual in english

413

7-3. Do-it-yourself maintenance

ain

ten

ce a
nd

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

ain

ten

ce a
nd

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

ain

ten

ce a
nd



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

ain

ten

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nd

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

ain

ten

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nd

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

425

8-1. Essential information

Wh
en

troubl
e ar
ises

it briefly 3 times or more in succes-
sion.

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 can not 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
pressure.

WARNING

If the EV 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 EV sys-

tem.

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 anticipated that the
vehicle will be flooded or set a drift.
Remain calm and follow the follow-
ing.

426

8-1. Essential information

Water level exceeds the floor

When the water level exceeds the floor and

time has passed, the electrical equipment

will get damaged, the power windows will

not operate, the motor stops, and the vehi-

cle 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 any authorized Lexus retailer or

Lexus authorized repairer, or any reli-
able repairer, or aftermarket accessory
manufacturer for further information
about an emergency hammer.

: 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 a drift, which

may lead to death.

427

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

8-2.Steps to take in an emergency

If your vehicle needs to be
towed

If towing is necessary, we recom-
mend having your vehicle towed by
any authorized Lexus retailer or
Lexus authorized repairer, or any
reliable repairer 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.

WARNING

Observe the following precautions.

Failure to do so may result in death or

serious injury.

When towing the vehicle

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.

While towing

When towing using cables or chains,

avoid sudden starts, etc., which place

excessive stress on the towing eyelets,

cables or chains. The towing eyelets,

cables or chains may become dam-

aged, broken debris may hit people,

and cause serious damage.

Do not perform any of the following as

doing so may cause the parking lock

mechanism to engage, locking the

front wheels and possibly leading to an

accident resulting in death or serious

injury:

• Unfasten the driver’s seat belt and

open the driver’s door.

• Turn the power switch off.

Installing towing eyelets to the vehi-

cle

Make sure that towing eyelets are

installed securely.

If not securely installed, towing eyelets

may come loose during towing.

NOTICE

To prevent damage to the vehicle

when towing using a wheel-lift type

truck

Do not tow the vehicle from the rear

when the power switch is OFF. The

steering lock mechanism is not strong

enough to hold the front wheels

straight.

When raising the vehicle, ensure ade-

quate ground clearance for towing at

the opposite end of the raised vehicle.

Without adequate clearance, the vehi-

cle could be damaged while being

towed.

To prevent damage to the vehicle

when towing with a sling-type truck

Do not tow with a sling-type truck, either

from the front or rear.

428

8-2. Steps to take in an emergency

In the following situations, it is not pos-
sible to be towed by another vehicle
using cables or chains, as the front
wheels may be locked due to the park-
ing lock. Contact any authorized Lexus
retailer or Lexus authorized repairer,
or any reliable repairer or commercial
towing service.



There is a malfunction in the shift
control system. (



P.226, 443)



There is a malfunction in the immo-
bilizer system. (



P.71)



There is a malfunction in the smart
entry & start system. (



P.458)



The 12-volt battery is discharged.
(



P.461)

The following may indicate a problem
with your transmission. Contact any
authorized Lexus retailer or Lexus
authorized repairer, or any reliable
repairer or commercial towing service
before towing.



The EV system warning message is
shown on the multi-information dis-

play and the vehicle does not move.



The vehicle makes an abnormal
sound.



From the front

Release the parking brake.
Turn automatic mode off. (



P.235)



From the rear

Use a towing dolly under the front
wheels.

NOTICE

To prevent damage to the vehicle

during emergency towing

Do not secure cables or chains to the

suspension components.

Situations when it is not possible
to be towed by another vehicle

Situations when it is necessary to
contact dealers before towing

Towing with a wheel-lift type
truck

429

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

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-
lets. This should only be attempted on
hard surfaced roads for short distances
at under 30 km/h (18 mph).
A driver must be in the vehicle to steer
and operate the brakes. The vehicle’s
wheels, drive train, 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.446)

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

430

8-2. Steps to take in an emergency

Tighten down the towing eyelet
securely using a hard metal bar.

Securely attach cables or chains to
the towing eyelet.

Take care not to damage the vehicle body.

Enter the vehicle being towed and
start the EV system.

If the EV system does not start, turn the

power switch to ON.

Shift the shift position to N and
release the parking brake.

Turn automatic mode off. (



P.235)

While towing

If the EV system is off, the power assist for

the brakes and steering will not function,

making steering and braking more difficult.

Wheel nut wrench

Wheel nut wrench can be purchased at any

authorized Lexus retailer or Lexus autho-

rized repairer, or any reliable repairer.



Fluid leaks under the vehicle
(Water dripping from the air condi-
tioning after use is normal.)



Flat-looking tires or uneven tire
wear



Excessive tire squeal when corner-
ing



Strange noises related to the sus-
pension system



Other noises related to the EV sys-
tem



Stumbling or running roughly



Appreciable loss of power



Vehicle pulls heavily to one side
when braking



Vehicle pulls heavily to one side
when driving on a level road

If you think something is
wrong

If you notice any of the following
symptoms, your vehicle probably
needs adjustment or repair. Con-
tact any authorized Lexus retailer
or Lexus authorized repairer, or
any reliable repairer as soon as pos-
sible.

Visible symptoms

Audible symptoms

Operational symptoms

432

8-2. Steps to take in an emergency

Brake system warning light (warning buzzer)

12-volt battery charging system warning light

(warning buzzer)

: This light illuminates on the multi-information display.

If a warning light turns on or a warning buzzer sounds

Calmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, but then goes off, this does not necessar-
ily indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspected by any authorized Lexus retailer or Lexus autho-
rized repairer, or any reliable repairer.

Actions to the warning lights or warning buzzers

Warning light

Details/Actions

(red)

Indicates that:



The brake fluid level is low; or



The brake system is malfunctioning



Immediately stop the vehicle in a safe place and contact any autho-
rized Lexus retailer or Lexus authorized repairer, or any reliable
repairer. Continuing to drive the vehicle may be dangerous.

Warning light

Details/Actions

Indicates a malfunction in the 12-volt battery charging system



Immediately stop the vehicle in a safe place and contact any autho-
rized Lexus retailer or Lexus authorized repairer, or any reliable
repairer.

433

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

Tire pressure warning light

Brake system warning light (warning buzzer)

SRS warning light (warning buzzer)

ABS warning light (warning buzzer)

Warning light

Details/Actions

When the light comes on after blinking for approximately 1 minute:
Malfunction in the tire pressure warning system



Have the system checked by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.

When the light comes on:
Low tire inflation pressure such as



Natural causes



Flat tire



Immediately stop the vehicle in a safe place. (



P.438)

Warning light

Details/Actions

(yellow)

Indicates a malfunction in:



The regenerative braking system;



The electronically controlled brake system; or



The parking brake system



Have the vehicle inspected by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

Warning light

Details/Actions

Indicates a malfunction in:



The SRS airbag system; or



The seat belt pretensioner system



Have the vehicle inspected by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

Warning light

Details/Actions

Indicates a malfunction in:



The ABS; or



The brake assist system



Have the vehicle inspected by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

434

8-2. Steps to take in an emergency

Electric power steering system warning light (warning buzzer)

Slip indicator

Parking brake indicator

Brake hold operated indicator (warning buzzer)

Warning light

Details/Actions

(red)

(yellow)

Indicates a malfunction in the EPS (Electric Power Steering) system



Have the vehicle inspected by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

Warning light

Details/Actions

Indicates a malfunction in:



The VSC system;



The TRC system; or



The hill-start assist control system



Have the vehicle inspected by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

Warning light

Details/Actions

(flashes)

Indicates a malfunction in the parking brake system



Have the vehicle inspected by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

Warning light

Details/Actions

(flashes)

Indicates a malfunction in the brake hold system



Have the vehicle inspected by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

435

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

Lexus parking assist-sensor OFF indicator (warning buzzer)

RCTA OFF indicator (warning buzzer)

PKSB OFF indicator (warning buzzer)

Warning light

Details/Actions

(flashes)

(if equipped)

When a buzzer sounds:
Indicates a malfunction in the Lexus parking assist-sensor function



Have the vehicle inspected by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

When a buzzer does not sound:
Indicates that the system is temporarily unavailable, possibly due to a
sensor being dirty or covered with ice, etc.



Follow the instructions displayed on the multi-information display.
(



P.308)

Warning light

Details/Actions

(flashes)

(if equipped)

When a buzzer sounds:
Indicates a malfunction in the RCTA (Rear Crossing Traffic Alert) func-
tion



Have the vehicle inspected by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

When a buzzer does not sound:
Indicates that the rear bumper around the radar sensor is covered with
dirt, etc. (



P.301)



Follow the instructions displayed on the multi-information display.
(P.314)

Warning light

Details/Actions

(flashes)

(if equipped)

When a buzzer sounds:
Indicates a malfunction in the PKSB (Parking Support Brake) system



Have the vehicle inspected by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

When a buzzer does not sound:
Indicates that the system is temporarily unavailable, possibly due to a
sensor being dirty or covered with ice, etc.



Follow the instructions displayed on the multi-information display.
(



P.322)

436

8-2. Steps to take in an emergency

Traction battery charge warning light (warning buzzer)

Driver’s and front passenger’s seat belt reminder light (warning buzzer)

: Driver’s and front passenger’s seat belt warning buzzer:

The driver’s and front passenger’s seat belt warning buzzer sounds to alert the driver and
front passenger that his or her seat belt is not fastened. If the seat belt is unfastened, the
buzzer sounds intermittently for a certain period of time after the vehicle reaches a certain
speed.

Rear passengers’ seat belt reminder lights

(warning buzzer)

: This light illuminates on the multi-information display. Regardless of whether or not a

rear passenger is present, if the power switch is turned to ON with the rear seat belts
unfastened, this light will also illuminate for a certain period of time.

: Rear passengers’ seat belt warning buzzer:

The rear passengers’ seat belt warning buzzer sounds to alert the rear passenger that his
or her seat belt is not fastened. If the seat belt is unfastened, the buzzer sounds intermit-
tently for a certain period of time after the vehicle reaches a certain speed.

Warning light

Details/Actions

Indicates that the remaining charge of the traction battery is low and
charging is required
When the outside temperature is low, this light may turn on earlier than
usual to urge the driver to charge the traction battery early.



Charge the traction battery. (



P.109)

Warning light

Details/Actions

Warns the driver and/or front passenger to fasten their seat belts



Fasten the seat belt.
If the front passenger’s seat is occupied, the front passenger’s seat
belt also needs to be fastened to make the warning light (warning
buzzer) turn off.

Warning light

Details/Actions

Warns the rear passengers to fasten their seat belts



Fasten the seat belt.

437

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

Brake Override System warning light/Drive-Start Control warning
light/PKSB warning light

(warning buzzer)

: This light illuminates on the multi-information display.

LTA indicator

(warning buzzer)

: This light illuminates on the multi-information display.

Warning light

Details/Actions

When a buzzer sounds:



Brake Override System is malfunctioning;



Drive-Start Control is operating;



Drive-Start Control is malfunctioning; or



Parking Support Brake function (static objects) (if equipped) is oper-
ating



Follow the instructions displayed on the multi-information display
and head-up display (if equipped).

When a buzzer does not sound:
Brake Override System is operating



Release the accelerator pedal and depress the brake pedal.

Warning light

Details/Actions

(orange)

Indicates a malfunction in the LTA (Lane Tracing Assist)



Follow the instructions displayed on the multi-information display.
(



P.278)

438

8-2. Steps to take in an emergency

PCS warning light (warning buzzer)

Warning buzzer

In some cases, the buzzer may not be heard

due to being in a noisy location or audio

sound.

Front passenger detection sensor, seat

belt reminder and warning buzzer

If luggage is placed on the front passen-

ger seat, the front passenger detection

sensor may cause the warning light to

flash and the warning buzzer to sound

even if a passenger is not sitting in the

seat.

If a cushion is placed on the seat, the sen-

sor may not detect a passenger, and the

warning light may not operate properly.

Electric power steering system warning

light (warning buzzer)

When the 12-volt battery charge becomes

insufficient or the voltage temporarily

drops, the electric power steering system

warning light may come on and the warning

buzzer may sound.

When the tire pressure warning light

comes on

Inspect the tires to check if a tire is punc-

tured.

If a tire is punctured:



P.444

If none of the tires are punctured:

Turn the power switch off then turn it to

ON. Check if the tire pressure warning

light comes on or blinks.



If the tire pressure warning light blinks for

approximately 1 minute then stays on

There may be a malfunction in the tire pres-

sure warning system. Have the vehicle

inspected by any authorized Lexus retailer

or Lexus authorized repairer, or any reli-

able repairer immediately.



If the tire pressure warning light comes

After the temperature of the tires has

lowered sufficiently, check the inflation

pressure of each tire and adjust them to

the specified level.

If the warning light does not turn off

even after several minutes have

elapsed, check that the inflation pres-

sure of each tire is at the specified level

and perform initialization. (



P.401)

The tire pressure warning light may

come on due to natural causes

The tire pressure warning light may come

on due to natural causes such as natural air

Warning light

Details/Actions

(flashes or illumi-

nates)

When a buzzer sounds simultaneously:
Indicates a malfunction has occurred in the PCS (Pre-Collision Sys-
tem).



Have the vehicle inspected by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

When a buzzer does not sound:
The PCS (Pre-Collision System) has become temporarily unavailable,
corrective action may be necessary.



Follow the instructions displayed on the multi-information display.
(



P.260, 442)

If the PCS (Pre-Collision System) or VSC (Vehicle Stability Control)
system is disabled, the PCS warning light will illuminate.



P.268

439

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

leaks and tire inflation pressure changes

caused by temperature. In this case, adjust-

ing the tire inflation pressure will turn off the

warning light (after a few minutes).

Conditions that the tire pressure warn-

ing system may not function properly



P.399

WARNING

If both the ABS and the brake system

warning lights remain on

Stop your vehicle in a safe place immedi-

ately and contact any authorized Lexus

retailer or Lexus authorized repairer, or

any reliable repairer.

The vehicle will become extremely

unstable during braking, and the ABS

system may fail, which could cause an

accident resulting in death or serious

injury.

When the electric power steering

system warning light comes on

When the light comes on yellow, the

assist to the power steering is restricted.

When the light comes on red, the assist

to the power steering is lost and handling

operations of the steering wheel become

extremely heavy.

When steering wheel operations are

heavier than usual, grip the steering

wheel firmly and operate it using more

force than usual.

If the tire pressure warning light

comes on

Be sure to observe the following precau-

tions.

Failure to do so could cause a loss of

vehicle control and result in death or

serious injury.

Stop your vehicle in a safe place as

soon as possible. Check and adjust the

tire inflation pressure immediately.

If the tire pressure warning light comes

on even after tire inflation pressure

adjustment, it is probable that you have

a flat tire. Check the tires. If a tire is flat,

repair the flat tire by using emergency

tire puncture repair kit and have the

flat tire repaired by the nearest autho-

rized Lexus retailer or Lexus autho-

rized repairer, or any reliable repairer.

Avoid abrupt maneuvering and brak-

ing.

If the vehicle tires deteriorate, you

could lose control of the steering

wheel or the brakes.

If a blowout or sudden air leakage

should occur

The tire pressure warning system may

not activate immediately.

NOTICE

To ensure the tire pressure warning

system operates properly

Do not install tires with different specifi-

cations or makers, as the tire pressure

warning system may not operate prop-

erly.

441

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

The warning lights and warning buzzers operate as follows depending on the con-
tent of the message. If a message indicates the need for inspection by a dealer,
have the vehicle inspected by any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer immediately.

: A buzzer sounds the first time a message is shown on the multi-information display.

Warning messages

The warning messages explained below

may differ from the actual messages

according to operation conditions and vehi-

cle specifications.

Warning buzzer

In some cases, the buzzer may not be heard

due to being in a noisy location or audio

sound.

If “EV system stopped Steering power

low” is displayed

This message is displayed if the EV system

is stopped while driving.
When steering wheel operations are

heavier than usual, grip the steering wheel

firmly and operate it using more force than

usual.

If “EV system overheated Output power

reduced” is displayed

This message may be displayed when driv-

ing under severe operating conditions. (For

example, when driving up a long steep hill.)

Handling method:



P.465

If “Shift System Malfunction Shifting

Unavailable Drive to a Safe Place and

Stop” or “Shift System Malfunction Dri-

ving Unavailable” is displayed

There is a malfunction in the shift control

system. Have the vehicle inspected by any

authorized Lexus retailer or Lexus autho-

rized repairer, or any reliable repairer

immediately.

Messages and warnings

Warning

light

Warning buzzer

Warning



Sounds

• Indicates an important situation, such as when a

system related to driving is malfunctioning or that
danger may result if the correction procedure is
not performed

• Indicates a situation, such as when damage to the

vehicle or danger may result

Comes on

or flashes

Sounds

Indicates an important situation, such as when the
systems shown on the multi-information display
may be malfunctioning



Does not sound

• Indicates a condition, such as malfunction of

electrical components, their condition, or indi-
cates the need for maintenance

• Indicates a situation, such as when an operation

has been performed incorrectly, or indicates
how to perform an operation correctly

442

8-2. Steps to take in an emergency

If “Shift to P Before Exiting Vehicle” is

shown

Message is displayed when the driver’s

door is opened without turning the power

switch off with the shift position in any posi-

tion other than P.
Shift the shift position to P.

If “Shift is in N Release accelerator

before shifting” is displayed

The accelerator pedal has been depressed

when the shift position is in N.
Release the accelerator pedal and shift the

shift position to D or R.

If “Press brake when vehicle is stopped

EV system may overheat” is displayed

The message may be displayed when the

accelerator pedal is depressed to hold the

vehicle while the vehicle is stopped on an

incline, etc. The EV system may overheat.

Release the accelerator pedal and depress

the brake pedal.

If “Auto Power Off To Conserve Bat-

tery” is displayed

Power was turned off due to the automatic

power off function. Next time when starting

the EV system, operate the EV system for

approximately 5 minutes to recharge the

12-volt battery.

If “Regenerative Braking Limited Press

Brake to Decelerate” is displayed

Regenerative braking may be restricted in

the following situations. Firmly depress the

brake pedal to decelerate the vehicle.

When electrical energy cannot be regen-

erated any more as the traction battery is

fully charged

When the temperature of the traction

battery is extremely high or extremely

low

When the temperature of the electric

motor or power control unit, etc. is

extremely high

If “High Power Consumption Power to

Climate Temporarily Limited” is dis-

played

Turn off unnecessary electronic equipment

to reduce power consumption.
Please wait until the power supply returns

to normal.

If “Radar Cruise Control Temporarily

Unavailable See Owner’s Manual” is

shown

The dynamic radar cruise control with full-

speed range system is suspended tempo-

rarily or until the problem shown in the mes-

sage is resolved. (causes and coping

methods:



P.260)

If “Radar Cruise Control Unavailable” is

shown

The dynamic radar cruise control with full-

speed range system cannot be used tempo-

rarily. Use the system when it becomes

available again.

If a message that indicates the malfunc-

tion of front camera is displayed

The following systems may be suspended

until the problem shown in the message is

resolved. (



P.260, 432)

PCS (Pre-Collision System)

LTA (Lane Tracing Assist)

AHS (Adaptive High-beam System) (if

equipped)

AHB (Automatic High Beam) (if

equipped)

RSA (Road Sign Assist)

Dynamic radar cruise control with full-

speed range

If a message that indicates the malfunc-

tion of radar sensor is displayed

The following systems may be suspended

until the problem shown in the message is

resolved. (



P.260, 432)

PCS (Pre-Collision System)

LTA (Lane Tracing Assist)

Dynamic radar cruise control with full-

speed range

443

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

If a message that indicates the need for

visiting any authorized Lexus retailer or

Lexus authorized repairer, or any reli-

able repairer is displayed

The system or part shown on the multi-

information display is malfunctioning. Have

the vehicle inspected by any authorized

Lexus retailer or Lexus authorized repairer,

or any reliable repairer immediately.

If a message that indicates the need for

the shift lever operation is displayed

To prevent the shift lever from being oper-

ated incorrectly or the vehicle from moving

unexpectedly, a message that requires

shifting the shift position may be displayed

on the multi-information display. In that

case, follow the instruction of the message

and shift the shift position.

If a message that indicates the need for

referring to Owner’s Manual is dis-

played

If any of the following messages are

shown on the multi-information display,

follow the instructions.

• “Battery Low” (



P.461)

• “Check Charging System Close

Charging Port Lid” (



P.150)

• “Charging system malfunction”

(



P.150)

• “Charging stopped High energy use”

(



P.150)

If any of the following messages are

shown on the multi-information display, it

may indicate a malfunction. Have the

vehicle inspected by any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer immedi-

ately.

• “Entry & Start System Malfunction”

• “Traction battery system malfunction”

• “Accelerator system malfunction”

• “Plug-in Charging System Malfunction”

• “EV system malfunction”

• “Shift System Malfunction Apply Parking

Brake Securely When Parking See

Owner’s Manual”

• “P Switch Malfunction Apply Parking

Brake Securely When Parking See

Owner’s Manual”

• “Shift System Unavailable Apply Parking

Brake Securely When Parking See

Owner’s Manual”

• “Shift System Malfunction See Owner’s

Manual”

• “Shift System Malfunction Stop in a Safe

Place See Owner’s Manual”

• “Battery Low Shifting Unavailable See

Owner’s Manual”

If any of the following messages are

shown on the multi-information display, it

may indicate a malfunction. Immediately

stop the vehicle and contact any autho-

rized Lexus retailer or Lexus authorized

repairer, or any reliable repairer.

• “Braking Power Low”

• “Shift System Malfunction”

NOTICE

If “High Power Consumption Power

to Climate Temporarily Limited” is

displayed frequently

There is a possible malfunction relating

to the charging system or the 12-volt bat-

tery may be deteriorating. Have the vehi-

cle inspected by any authorized Lexus

retailer or Lexus authorized repairer, or

any reliable repairer.

If “Battery Low” is displayed fre-

quently

The 12-volt battery may have deterio-

rated. As the battery may discharge in

this state when left unattended, have the

battery inspected by any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer.

If “Maintenance Reqd. For Traction

Battery At Your Dealer” is shown

The traction battery is scheduled to be

inspected or replaced. Have the vehicle

inspected by any authorized Lexus

retailer or Lexus authorized repairer, or

any reliable repairer immediately.

Continuing to drive the vehicle without

having the traction battery inspected

will cause the EV system not to start.

444

8-2. Steps to take in an emergency



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



Set the parking brake.

NOTICE

If the EV system does not start, contact

any authorized Lexus retailer or Lexus

authorized repairer, or any reliable

repairer immediately.

If you have a flat tire

Your vehicle is not equipped with a
spare tire, but instead is equipped
with an emergency tire puncture
repair kit.
A puncture caused by a nail or
screw passing through the tire
tread can be repaired temporarily
using the emergency tire puncture
repair kit.

(The kit contains a bottle of sealant.
The sealant can be used only once
to temporarily repair one tire with-
out removing the nail or screw from
the tire.) Depending on the damage
condition of the flat tire, it may not
be able to repaired with the emer-
gency tire puncture repair kit.

After temporarily repairing the tire
with the kit, have the tire repaired
or replaced by any authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

WARNING

If you have a flat tire

Do not continue driving with a flat tire.
Driving even a short distance with a flat

tire can damage the tire and the wheel

beyond repair, which could result in an

accident.

Before repairing the vehicle

Lexus UX 300e (2023 year). Manual in english - page 13