Lexus UX 300e (2022 year). Manual in english - page 25

425

8

8-1. Essential information

Wh
en

 troubl
e ar
ises

it briefly 3 times or more in succes-
sion.

5

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

Q

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

Q

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.

Q

Using an emergency escape hammer

*1

Laminated glass

*2

 is used in the windshield 

and front side windows on this vehicle. 

Laminated glass cannot be shattered with 
an emergency hammer

*1

.

*1

: 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.

*2

: If equipped

Q

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

Q

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.

A

B

427

8

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.

Q

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.

Q

While towing

O

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.

O

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.

Q

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

Q

To prevent damage to the vehicle 

when towing using a wheel-lift type 

truck

O

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.

O

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.

Q

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

Q

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

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.

1

Take out the towing eyelet. 
(



P.446)

2

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.

3

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

NOTICE

Q

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

4

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

5

Securely attach cables or chains to 
the towing eyelet.

Take care not to damage the vehicle body.

6

Enter the vehicle being towed and 
start the EV system.

If the EV system does not start, turn the 

power switch to ON.

7

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

Turn automatic mode off. (



P.235)

Q

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.

Q

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

431

8

8-2. Steps to take in an emergency

Wh
en

 troubl
e ar
ises



Loss of brake effectiveness, spongy 
feeling, pedal almost touches the 
floor

432

8-2. Steps to take in an emergency

Q

Brake system warning light (warning buzzer)

Q

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

8-2. Steps to take in an emergency

Wh
en

 troubl
e ar
ises

Q

Tire pressure warning light

Q

Brake system warning light (warning buzzer)

Q

SRS warning light (warning buzzer)

Q

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

Q

Electric power steering system warning light (warning buzzer)

Q

Slip indicator

Q

Parking brake indicator

Q

Brake hold operated indicator (warning buzzer)

Warning light

Details/Actions

(red)

or

(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

8-2. Steps to take in an emergency

Wh
en

 troubl
e ar
ises

Q

Lexus parking assist-sensor OFF indicator (warning buzzer)

Q

RCTA OFF indicator (warning buzzer)

Q

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

Q

Traction battery charge warning light (warning buzzer)

Q

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.

Q

Rear passengers’ seat belt reminder lights

*1

 (warning buzzer)

*2

*1

: 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.

*2

: 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

8-2. Steps to take in an emergency

Wh
en

 troubl
e ar
ises

Q

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

*

 (warning buzzer)

*

: This light illuminates on the multi-information display.

Q

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

Q

PCS warning light (warning buzzer)

Q

Warning buzzer

In some cases, the buzzer may not be heard 

due to being in a noisy location or audio 

sound.

Q

Front passenger detection sensor, seat 

belt reminder and warning buzzer

O

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.

O

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

sor may not detect a passenger, and the 

warning light may not operate properly.

Q

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.

Q

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 

on

1

After the temperature of the tires has 

lowered sufficiently, check the inflation 

pressure of each tire and adjust them to 

the specified level.

2

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)

Q

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

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).

Q

Conditions that the tire pressure warn-

ing system may not function properly



P.399

WARNING

Q

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.

Q

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.

Q

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.

O

Stop your vehicle in a safe place as 

soon as possible. Check and adjust the 

tire inflation pressure immediately.

O

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.

O

Avoid abrupt maneuvering and brak-

ing.

If the vehicle tires deteriorate, you 

could lose control of the steering 

wheel or the brakes.

Q

If a blowout or sudden air leakage 

should occur

The tire pressure warning system may 

not activate immediately.

NOTICE

Q

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.

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8-2. Steps to take in an emergency

If a warning message is dis-
played

The multi-information display 
shows warnings of system malfunc-
tions, incorrectly performed opera-
tions, and messages that indicate a 
need for maintenance. When a 
message is shown, perform the cor-
rection procedure appropriate to 
the message.

Multi-information display

Follow the instructions of the message 
on the multi-information display.
If any of the warning messages are 
shown again after the following actions 
have been performed, contact any 
authorized Lexus retailer or Lexus 
authorized repairer, or any reliable 
repairer.

A