Lexus UX250h (2023 year). Manual in english

250

4-5. Using the driving support systems

WARNING

■

Cautions regarding the use of the

system

Do not overly rely on the system, as

doing so may lead to an accident.
Always drive while checking the safety of

the surroundings of the vehicle.
Depending on the vehicle and road con-

ditions, weather, etc., the system may not

operate.
The detection capabilities of sensors and

radars are limited. Always drive while

checking the safety of the surroundings

of the vehicle.

●

The driver is solely responsible for safe

driving. Always drive carefully, taking

care to observe your surroundings.

The Parking Support Brake system is

designed to provide support to lessen

the severity of collisions. However, it

may not operate in some situations.

●

The Parking Support Brake system is

not designed to stop the vehicle com-

pletely. Additionally, even if the system

has stopped the vehicle, it is necessary

to depress the brake pedal immedi-

ately as brake control will be canceled

after approximately 2 seconds.

●

It is extremely dangerous to check the

system operations by intentionally

driving the vehicle into the direction of

a wall, etc. Never attempt such actions.

■

When to disable the Parking Support

Brake

In the following situations, disable the

Parking Support Brake as the system

may operate even though there is no

possibility of a collision.

●

When inspecting the vehicle using a

chassis roller, chassis dynamo or free

roller.

●

When loading the vehicle onto a boat,

truck or other transport vessel.

●

If the suspension has been modified or

tires of a size other than specified are

installed.

●

If the front of the vehicle is raised or

lowered due to the carried load.

●

When equipment that may obstruct a

sensor is installed, such as a towing

eyelet, bumper protector (an addi-

tional trim strip, etc.), bicycle carrier,

or snow plow.

●

When using automatic car washing

devices.

●

If the vehicle cannot be driven in a sta-

ble manner, such as when the vehicle

has been in an accident or is malfunc-

tioning.

●

When the vehicle is driven in a sporty

manner or off-road.

●

When the tires are not properly

inflated.

●

When the tires are very worn.

●

When tire chains, a compact spare tire

or an emergency tire puncture repair

kit are used.

●

During emergency towing.

NOTICE

■

If “Parking Support Brake Unavail-

able” is displayed on the multi-infor-

mation display and the PKSB OFF

indicator is flashing

If this message is displayed immediately

after the power switch is changed to ON,

operate the vehicle carefully, paying

attention to your surroundings. It may be

necessary to drive the vehicle for a cer-

tain amount of time before the system

returns to normal. (If the system does not

return to normal after driving for a while,

clean the sensors and their surrounding

area on the bumpers.)

251

4-5. Using the driving support systems

ivi

The Parking Support Brake can be
enabled/disabled on the multi-infor-
mation display. All of the Parking Sup-
port Brake functions (static objects and
rear crossing vehicles) are
enabled/disabled simultaneously.
Use the meter control switches to
enable/disable the parking support
brake. (



P.89)

Press

to select

Press

to select

and

then press “OK”.

When the Parking Support Brake is dis-

abled, the PKSB OFF indicator (



P.76)

illuminates on the multi-information dis-

play.
When the Parking Support Brake is turned

on or off, operation of the Parking Support

Brake continues in the same condition the

next time the hybrid system is started.

If the hybrid system output restriction con-
trol or brake control operates, a buzzer
will sound and a message will be displayed
on the multi-information display, to alert
the driver. On vehicles with head-up dis-
play, the head-up display will display the
same message as the multi-information
display.
Depending on the situation, hybrid system
output restriction control will operate to
either limit acceleration or restrict output
as much as possible.



Hybrid system output restriction

control is operating (acceleration
restriction)

Acceleration greater than a certain
amount is restricted by the system.
Multi-information display: “Object
Detected Acceleration Reduced”
PKSB OFF indicator: Not illuminated
Buzzer: Does not sound



Hybrid system output restriction
control is operating (output
restricted as much as possible)

The system has determined that stronger-
than-normal brake operation is necessary.
Multi-information display: “BRAKE!”
PKSB OFF indicator: Not illuminated
Buzzer: Short beep



Brake control is operating

The system determined that emergency
braking is necessary.
Multi-information display: “BRAKE!”
PKSB OFF indicator: Not illuminated
Buzzer: Short beep



Vehicle stopped by system opera-
tion

The vehicle has been stopped by brake
control operation.
Multi-information display: “Switch to
Brake” (If the accelerator pedal is not
depressed, “Press Brake Pedal” will be dis-
played.)
PKSB OFF indicator: Illuminated
Buzzer: Short beep

If the Parking Support Brake deter-
mines that a collision with a detected

Enabling/Disabling the Parking
Support Brake

Displays and buzzers for hybrid
system output restriction control
and brake control

System overview

252

4-5. Using the driving support systems

object is possible, the hybrid system
output will be restricted to restrain any
increase in the vehicle speed. (Hybrid
system output restriction control: See
figure 2 below.)
Additionally, if the accelerator pedal
continues to be depressed, the brakes
will be applied automatically to reduce
the vehicle speed. (Brake control: See
figure 3 below.)



Figure 1 When the PKSB (Parking
Support Brake) is disabled

Hybrid system output

Braking force

Time



Figure 2 When hybrid system out-
put restriction control operates

Hybrid system output

Braking force

Time

Hybrid system output restriction
control begins operating (The sys-
tem determines that possibility of
collision with detected object is
high)

“BRAKE!” is displayed on the multi-infor-
mation display.

Hybrid system output reduced



Figure 3 When brake control oper-
ates

Hybrid system output

Braking force

Time

Hybrid system output restriction
control begins operating (The sys-
tem determines that possibility of
collision with detected object is
high)

“BRAKE!” is displayed on the multi-infor-
mation display.

Hybrid system output reduced

Brake control begins operating
(the system determines that possi-
bility of collision with detected
object is extremely high)

Brake control strength increased

“Switch to Brake” is displayed on

A
B
C

A
B
C
D

E
F

253

4-5. Using the driving support systems

ivi

the multi-information display

■

If the Parking Support Brake has oper-

ated

If the vehicle is stopped due to operation of

the Parking Support Brake, the Parking

Support Brake will be disabled and the

PKSB OFF indicator will illuminate. If the

Parking Support Brake operates unneces-

sarily, brake control can be canceled by

depressing the brake pedal or waiting for

approximately 2 seconds for it to automati-

cally be canceled. Then, the vehicle can be

operated by depressing the accelerator

pedal.

■

Re-enabling the Parking Support Brake

To re-enable the Parking Support Brake

when it is disabled due to operation of the

Parking Support Brake, either enable the

system again (



P.251), or turn the power

switch off and then back to ON. Addition-

ally, if the object becomes no longer in the

traveling direction of the vehicle or if the

traveling direction of the vehicle changes

(such as changing from moving forward to

backing up, or from backing up to moving

forward), the system will be re-enabled

automatically.

■

If “Parking Support Brake Unavailable”

is displayed on the multi-information

display and the PKSB OFF indicator is

flashing

If this message is displayed, a sensor on the

front or rear bumper may be dirty. Clean

the sensors and their surrounding area on

the bumpers.

■

If “Parking Support Brake Unavailable”

and “Parking Assist Unavailable Clean

Parking Assist Sensor” are displayed on

the multi-information display and the

PKSB OFF indicator is flashing

●

A sensor may be covered with ice, snow,

dirt, etc. In this case, remove the ice,

snow, dirt, etc., from the sensor to return

the system to normal. If this message is

shown even after removing dirt from the

sensor, or shown when the sensor was

not dirty to begin with, have the vehicle

inspected at your Lexus dealer.

●

A sensor may be frozen. Once the ice

melts, the system will return to normal.

●

Water may be continuously flowing over

the sensor surface, such as in a heavy

rain. When the system determines that it

is normal, the system will return to nor-

mal.

■

If a 12-volt battery terminal has been

disconnected and reconnected

The system needs to be initialized. To initial-

ize the system, drive the vehicle straight

ahead for 5 seconds or more at a speed of

approximately 22 mph (35 km/h) or more.

255

4-5. Using the driving support systems

ivi

■

When the vehicle moves in the
unintended direction due to the
wrong shift position being selected



P.237

■

The Parking Support Brake function

(static objects) will operate when

The function will operate when the PKSB

OFF indicator is not illuminated or flashing

(



P.75, 76) and all of the following condi-

tions are met:

●

Hybrid system output restriction control

• The Parking Support Brake is enabled.

• The vehicle speed is approximately 10

mph (15 km/h) or less.

• There is a static object in the traveling

direction of the vehicle and approxi-

mately 6 to 13 ft. (2 to 4 m) away.

• The Parking Support Brake determines

that a stronger-than-normal brake oper-

ation is necessary to avoid a collision.

●

Brake control

• Hybrid system output restriction control

is operating.

• The Parking Support Brake determines

that an immediate brake operation is

necessary to avoid a collision.

■

The Parking Support Brake function

(static objects) will stop operating when

The function will stop operating if any of the

following conditions are met:

●

Hybrid system output restriction control

• The Parking Support Brake is disabled.

• The system determines that the collision

has become avoidable with normal brake

operation.

• The static object is no longer approxi-

mately 6 to 13 ft. (2 to 4 m) away from the

vehicle or in the traveling direction of the

vehicle.

●

Brake control

• The Parking Support Brake is disabled.

• Approximately 2 seconds have elapsed

since the vehicle was stopped by brake

control.

• The brake pedal is depressed after the

vehicle is stopped by brake control.

• The static object is no longer approxi-

mately 6 to 13 ft. (2 to 4 m) away from the

vehicle or in the traveling direction of the

vehicle.

■

Detection range of the Parking Support

Brake function (static objects)

The detection range of the Parking Support

Brake function (static objects) differs from

the detection range of the intuitive parking

assist. (



P.242) Therefore, even if the

intuitive parking assist detects an object and

provides a warning, the Parking Support

Brake function (static objects) may not start

operating.

■

Situations in which the Parking Support

Brake function (static objects) may not

operate

When driving with the shift lever in N

Types of sensors

WARNING

■

To ensure the system can operate

properly



P.239

■

If the Parking Support Brake function

(static objects) operates unnecessar-

ily, such as at a railroad crossing



P.253

■

Notes when washing the vehicle



P.239

256

4-5. Using the driving support systems

■

Situations in which the system may not

operate properly



P.240

■

Situations in which the system may

operate even if there is no possibility of a

collision



P.241

: If equipped

This function will operate in situations
such as the following if a vehicle is
detected in the traveling direction of
the vehicle.

■

When reversing, a vehicle is
approaching and the brake pedal is
not depressed, or is depressed late



P.233

Parking Support Brake
function (rear-crossing vehi-
cles)

If a rear radar sensor detects a
vehicle approaching from the right
or left at the rear of the vehicle and
the system determines that the pos-
sibility of a collision is high, this
function will perform brake control
to reduce the likelihood of an
impact with the approaching vehi-
cle.

Examples of function operation

Types of sensors

257

4-5. Using the driving support systems

ivi

■

The Parking Support Brake function

(rear-crossing vehicles) will operate

when

The function will operate when the PKSB

OFF indicator is not illuminated or flashing

(



P.75, 76) and all of the following condi-

tions are met:

●

Hybrid system output restriction control

• The Parking Support Brake is enabled.

• The vehicle speed is approximately 10

mph (15 km/h) or less.

• Vehicles are approaching from the right

or left at the rear of the vehicle at a travel-

ing speed of approximately 5 mph (8

km/h) or more.

• The shift lever is in R.

• The Parking Support Brake determines

that a stronger than normal brake opera-

tion is necessary to avoid a collision with

an approaching vehicle.

●

Brake control

• Hybrid system output restriction control

is operating.

• The Parking Support Brake determines

that an emergency brake operation is

necessary to avoid a collision with an

approaching vehicle.

■

The Parking Support Brake function

(rear-crossing vehicles) will stop oper-

ating when

The function will stop operating if any of the

following conditions are met:

●

Hybrid system output restriction control

• The Parking Support Brake is disabled.

• The collision becomes avoidable with

normal brake operation.

• A vehicle is no longer approaching from

the right or left at the rear of the vehicle.

●

Brake control

• The Parking Support Brake is disabled.

• Approximately 2 seconds have elapsed

since the vehicle was stopped by brake

control.

• The brake pedal is depressed after the

vehicle is stopped by brake control.

• A vehicle is no longer approaching from

the right or left at the rear of the vehicle.

■

Detection area of the Parking Support

Brake function (rear-crossing vehicles)

The detection area of the Parking Support

Brake function (rear-crossing vehicles) dif-

fers from the detection area of the RCTA

function (



P.246). Therefore, even if the

RCTA function detects a vehicle and pro-

vides an alert, the Parking Support Brake

function (rear-crossing vehicles) may not

start operating.

■

Situations in which the system may not

operate properly



P.247

■

Situations in which the system may

operate even if there is no possibility of a

collision



P.248

WARNING

■

To ensure the system can operate

properly



P.232

258

4-5. Using the driving support systems



Vehicles without Adaptive Variable
Suspension system

Except F SPORT models

F SPORT models

Normal mode

Provides an optimal balance of fuel econ-
omy, quietness, and dynamic performance.
Suitable for city driving.
Press the switch to change the driving
mode to Normal mode when not in Nor-
mal mode.

Eco drive mode

Helps the driver accelerate in an eco-
friendly manner and improve fuel economy
through moderate throttle characteristics

and by controlling the operation of the air
conditioning system (heating/cooling).
When not in Eco drive mode, if the driving
mode select switch is turned toward you,
the “Eco” indicator comes on.

Sport mode

Assists acceleration response by con-
trolling the hybrid system and steering.
Suitable for when precise handling is desir-
able, for example when driving on moun-
tain roads.
When not in Sport mode, if the driving
mode select switch is turned backward, the
“Sport” indicator comes on and the Hybrid
System Indicator changes to the tachome-
ter. (



P.79, 83)



Vehicles with Adaptive Variable
Suspension system

Normal mode/Custom mode

Normal mode and Custom mode are
selected by pressing the driving mode
select switch. Each time the switch is
pressed, the driving mode changes
between Normal mode and Custom
mode. When Custom mode is selected,
the “Custom” indicator comes on.
Press the switch to change the driving
mode to Normal mode when not in Nor-
mal mode.

Driving mode select switch

The driving modes can be selected
to suit driving conditions.

Selecting the driving mode

A
B

259

4-5. Using the driving support systems

ivi

• Normal mode
Provides an optimal balance of fuel econ-
omy, quietness, and dynamic performance.
Suitable for city driving.
• Custom mode
Allows you to drive with the power train,
chassis and air conditioning system func-
tions set to your preferred settings.
Custom mode settings can only be
changed on the drive mode customization
display of Center Display. (



P.426)

Eco drive mode

Helps the driver accelerate in an eco-
friendly manner and improve fuel economy
through moderate throttle characteristics
and by controlling the operation of the air
conditioning system (heating/cooling).
When not in Eco drive mode, if the driving
mode select switch is turned toward you,
the “Eco” indicator comes on.

Sport mode

• SPORT S mode
Assists acceleration response by con-
trolling the hybrid system.
When not in Sport S mode, if the driving
mode select switch is turned away from
you, the “Sport S” indicator comes on and
the Hybrid System Indicator changes to
the tachometer. (



P.79, 83)

• SPORT S+ mode
Helps to ensure superior vehicle stability
by simultaneously controlling the steering
and suspension in addition to the hybrid
system. Suitable for sportier driving.
When in SPORT S mode, if the driving
mode select switch is turned backward, the
“Sport S+” indicator comes on.

■

Operation of the air conditioning sys-

tem in Eco drive mode

Eco drive mode controls the heating/cool-

ing operations and fan speed of the air con-

ditioning system to enhance fuel efficiency.

To improve air conditioning performance,

perform the following operations:

●

Turn off eco air conditioning mode

(



P.279)

●

Adjust the fan speed (



P.275, 278)

●

Turn off Eco drive mode

■

Automatic deactivation of Sport mode

and Custom mode (if equipped)

If the power switch is turned off after driving

in Sport mode or Custom mode, the driving

mode will be changed to Normal mode.

■

Driving mode pop-up display

When the driving mode is changed, the

selected driving mode will be temporarily

displayed on the Center Display. (Except

for Normal mode)
For Custom mode, select “Settings” on the

display to customize the driving mode.

■

Customization (vehicles with Adaptive

Variable Suspension system)

Settings (e.g. custom mode) can be

changed. (Customizable fea-

tures:



P.435)

260

4-5. Using the driving support systems

■

ECB (Electronically Controlled
Brake System)

The electronically controlled system
generates braking force correspond-
ing to the brake operation

■

ABS (Anti-lock Brake System)

Helps to prevent wheel lock when the
brakes are applied suddenly, or if the
brakes are applied while driving on a
slippery road surface

■

Brake assist

Generates an increased level of brak-
ing force after the brake pedal is
depressed when the system detects a
panic stop situation

■

VSC (Vehicle Stability Control)

Helps the driver to control skidding
when swerving suddenly or turning on
slippery road surfaces

■

Enhanced VSC (Enhanced Vehi-
cle Stability Control)

Provides cooperative control of the
ABS, TRAC, VSC and EPS.

Helps to maintain directional stability
when swerving on slippery road sur-
faces by controlling steering perfor-
mance.

■

Secondary Collision Brake

When the airbag sensor detects a colli-
sion, the brakes and brake lights are
automatically controlled to reduce the
vehicle speed and that helps reduce
the possibility of further damage due to
a secondary collision

■

TRAC (Traction Control)

Helps to maintain drive power and
prevent the drive wheels from spinning
when starting the vehicle or accelerat-
ing on slippery roads

■

Active Cornering Assist (ACA)

Helps to prevent the vehicle from drift-
ing to the outer side by performing
inner wheel brake control when
attempting to accelerate during cor-
nering

■

Hill-start assist control

Helps to reduce the backward move-
ment of the vehicle when starting on an
uphill

■

EPS (Electric Power Steering)

Employs an electric motor to reduce
the amount of effort needed to turn the
steering wheel

■

E-Four (AWD models)

Electronic On-Demand AWD system.
Automatically switches from front-
wheel drive to all-wheel drive (AWD)
according to the driving conditions,
helping to ensure reliable handling and

Driving assist systems

To keep driving safety and perfor-
mance, the following systems oper-
ate automatically in response to
various driving situations. Be
aware, however, that these systems
are supplementary and should not
be relied upon too heavily when
operating the vehicle.

Summary of the driving assist
systems

261

4-5. Using the driving support systems

ivi

stability. Examples of conditions where
the system will switch to AWD are
when cornering, going uphill, starting
off or accelerating, and when the road
surface is slippery due to snow, rain,
etc.

■

AVS (Adaptive Variable Suspen-
sion system) (if equipped)

By independently controlling the
damping force of the shock absorbers
for each of the 4 wheels according to
the road and driving conditions, this
system helps riding comfort with supe-
rior vehicle stability, and helps good
vehicle posture. If Sport S+ mode is
selected using the driving mode select
switch, the damping force will become
more suitable for sporty driving.
(



P.258)

■

When the TRAC/VSC/ABS systems

are operating

The slip indicator light will flash while the

TRAC/VSC/ABS systems are operating.

■

Disabling the TRAC system

If the vehicle gets stuck in mud, dirt or snow,
the TRAC system may reduce power from
the hybrid system to the wheels. Pressing

the

switch to turn the system off may

make it easier for you to rock the vehicle in
order to free it.
To turn the TRAC system off, quickly press

and release the

switch.

The “Traction Control Turned Off” will be
shown on the multi-information display.

Press the

switch again to turn the

system back on.

■

Disabling both TRAC and VSC systems

To turn the TRAC and VSC systems off,

press and hold the

switch for more

than 3 seconds while the vehicle is stopped.
The VSC OFF indicator light will come on
and the “Traction Control Turned Off” will
be shown on the multi-information display.

Press the

switch again to turn the

system back on.

: Pre-collision brake assist and pre-colli-

sion braking will also be disabled. The
PCS warning light will come on and the
message will be shown on the multi-infor-
mation display. (



P.209)

■

When the message is displayed on the
multi-information display showing that
TRAC has been disabled even if the

switch has not been pressed

TRAC is temporary deactivated. If the

information continues to show, contact your

Lexus dealer.

■

Operating conditions of hill-start assist

control

When the following four conditions are met,

the hill-start assist control will operate:

●

The shift lever is in a position other than P

or N (when starting off forward/back-

ward on an upward incline).

●

The vehicle is stopped.

262

4-5. Using the driving support systems

●

The accelerator pedal is not depressed.

●

The parking brake is not engaged.

■

Automatic system cancelation of hill-

start assist control

The hill-start assist control will turn off in any

of the following situations:

●

The shift lever is shifted to P or N.

●

The accelerator pedal is depressed.

●

The parking brake is engaged.

●

2 seconds at maximum elapsed after the

brake pedal is released

■

Sounds and vibrations caused by the

ABS, brake assist, VSC, TRAC and hill-

start assist control systems

●

A sound may be heard from the engine

compartment when the brake pedal is

depressed repeatedly, when the hybrid

system is started or just after the vehicle

begins to move. This sound does not indi-

cate that a malfunction has occurred in

any of these systems.

●

Any of the following conditions may

occur when the above systems are oper-

ating.

None of these indicates that a malfunc-

tion has occurred.

• Vibrations may be felt through the vehi-

cle body and steering.

• A motor sound may be heard also after

the vehicle comes to a stop.

■

ECB operating sound

ECB operating sound may be heard in the

following cases, but it does not indicate that

a malfunction has occurred.

●

Operating sound heard from the engine

compartment when the brake pedal is

operated.

●

Motor sound of the brake system heard

from the front part of the vehicle when

the driver’s door is opened.

●

Operating sound heard from the engine

compartment when one or two minutes

passed after the stop of the hybrid sys-

tem.

■

Active Cornering Assist operation

sounds and vibrations

When Active Cornering Assist is operated,

operation sounds and vibrations may be

generated from the brake system, but this is

not a malfunction.

■

EPS operation sound

When the steering wheel is operated, a

motor sound (whirring sound) may be

heard. This does not indicate a malfunction.

■

Automatic reactivation of TRAC and

VSC systems

After turning the TRAC and VSC systems

off, the systems will be automatically re-

enabled in the following situations:

●

When the power switch is turned off

●

If only the TRAC system is turned off, the

TRAC will turn on when vehicle speed

increases. If both the TRAC and VSC

systems are turned off, automatic re-

enabling will not occur when vehicle

speed increases.

■

Secondary Collision Brake operating

conditions

The vehicle speed is approximately 6 mph

(10 km/h) or more and the airbag sensor

detects a collision. (The Secondary Colli-

sion Brake will not operate when the vehi-

cle speed is below approximately 6 mph

[10 km/h].)

■

Secondary Collision Brake automatic

cancellation

The Secondary Collision Brake is automati-

cally canceled in the following situations.

●

The vehicle speed drops below approxi-

mately 6 mph (10 km/h)

●

A certain amount of time elapses during

operation

●

The accelerator pedal is depressed a

large amount

■

Operating conditions of Active Corner-

ing Assist

The system operates in the following situa-

tions.

●

TRAC/VSC can operate

●

The system determines that the vehicle is

drifting to the outer side when attempting

to accelerate during cornering

●

The brake pedal is released

263

4-5. Using the driving support systems

ivi

■

Reduced effectiveness of the EPS sys-

tem

The effectiveness of the EPS system is

reduced to prevent the system from over-

heating when there is frequent steering

input over an extended period of time. The

steering wheel may feel heavy as a result.

Should this occur, refrain from excessive

steering input or stop the vehicle and turn

the hybrid system off. The EPS system

should return to normal within 10 minutes.

■

If a message about AWD system is

shown on the multi-information display

(AWD models)

If one of the following messages is shown on

the multi-information display, perform each

action.

●

“AWD System Overheated Switching to

2WD Mode”

The AWD system is overheating. Reduce
load on the system by stopping the vehicle
for a while or driving the vehicle at a speed
of 6 mph (10 km/h) or more. If the message
disappears, it is possible to drive the vehicle
normally.

●

“AWD System Overheated 2WD Mode

Engaged”

The AWD system has been canceled and
switched to the front-wheel drive due to
overheating. Reduce load on the system by
stopping the vehicle for a while or driving
the vehicle at a speed of 6 mph (10 km/h)
or more. If the message disappears, it is
possible to drive the vehicle normally.

●

“AWD System Malfunction 2WD Mode

Engaged Visit Your Dealer”

The AWD system has been stopped and
switched to the front-wheel drive due to a
malfunction. Have your vehicle inspected
by your Lexus dealer immediately.

WARNING

■

The ABS does not operate effectively

when

●

The limits of tire gripping performance

have been exceeded (such as exces-

sively worn tires on a snow covered

road).

●

The vehicle hydroplanes while driving

at high speed on wet or slick road.

■

Stopping distance when the ABS is

operating may exceed that of normal

conditions

The ABS is not designed to shorten the

vehicle’s stopping distance. Always

maintain a safe distance from the vehicle

in front of you, especially in the following

situations:

●

When driving on dirt, gravel or snow-

covered roads

●

When driving with tire chains

●

When driving over bumps in the road

●

When driving over roads with pot-

holes or uneven surfaces

■

TRAC/VSC may not operate effec-

tively when

Directional control and power may not

be achievable while driving on slippery

road surfaces, even if the TRAC/VSC

system is operating.

Drive the vehicle carefully in conditions

where stability and power may be lost.

■

Active Cornering Assist does not

operate effectively when

●

Do not rely solely upon Active Cor-

nering Assist. Active Cornering Assist

may not operate effectively when

accelerating down slopes or driving on

slippery road surfaces.

●

When Active Cornering Assist fre-

quently operates, Active Cornering

Assist may temporarily stop operating

to ensure proper operation of the

brakes, TRAC, VSC.

264

4-5. Using the driving support systems

WARNING

■

Hill-start assist control does not oper-

ate effectively when

●

Do not overly rely on hill-start assist

control. Hill-start assist control may

not operate effectively on steep

inclines and roads covered with ice.

●

Unlike the parking brake, hill-start

assist control is not intended to hold

the vehicle stationary for an extended

period of time. Do not attempt to use

hill-start assist control to hold the vehi-

cle on an incline, as doing so may lead

to an accident.

■

When the TRAC/ABS/VSC is acti-

vated

The slip indicator light flashes. Always

drive carefully. Reckless driving may

cause an accident. Exercise particular

care when the indicator light flashes.

■

When the TRAC/VSC systems are

turned off

Be especially careful and drive at a

speed appropriate to the road condi-

tions. As these are the systems to help

ensure vehicle stability and driving force,

do not turn the TRAC/VSC systems off

unless necessary.

■

Secondary Collision Brake

Do not overly rely on the Secondary

Collision Brake. This system is designed

to help reduce the possibility of further

damage due to a secondary collision,

however, that effect changes according

to various conditions. Overly relying on

the system may result in death or serious

injury.

■

Replacing tires

Make sure that all tires are of the speci-

fied size, brand, tread pattern and total

load capacity. In addition, make sure that

the tires are inflated to the recom-

mended tire inflation pressure level.

The ABS, TRAC and VSC systems will

not function correctly if different tires are

installed on the vehicle.

Contact your Lexus dealer for further

information when replacing tires or

wheels.

■

Handling of tires and the suspension

Using tires with any kind of problem or

modifying the suspension will affect the

driving assist systems, and may cause a

system to malfunction.

265

4-6. Driving tips

ivi

4-6.Driving tips

When using Eco drive mode, the
torque corresponding to the accelera-
tor pedal depression amount can be
generated more smoothly than it is in
normal conditions. In addition, the
operation of the air conditioning sys-
tem (heating/cooling) will be mini-
mized, improving the fuel economy.
(



P.258)

The Eco-friendly driving is possible by
keeping the indicator of Hybrid System
Indicator within Eco area. (



P.80,

85)

Shift the shift lever to D when stopped
at a traffic light, or driving in heavy traf-
fic, etc. Shift the shift lever to P when
parking. When using the N, there is no
positive effect on fuel consumption. In
the N, the gasoline engine operates
but electricity cannot be generated.
Also, when using the air conditioning
system, etc., the hybrid battery (trac-
tion battery) power is consumed.



Drive your vehicle smoothly. Avoid
abrupt acceleration and decelera-
tion. Gradual acceleration and
deceleration will make more effec-
tive use of the electric motor (trac-
tion motor) without having to use
gasoline engine power.



Avoid repeated acceleration.
Repeated acceleration consumes
hybrid battery (traction battery)
power, resulting in poor fuel con-
sumption. Battery power can be
restored by driving with the acceler-
ator pedal slightly released.

Make sure to operate the brakes gen-
tly and in a timely manner. A greater
amount of electrical energy can be
regenerated when slowing down.

Repeated acceleration and decelera-
tion, as well as long waits at traffic
lights, will lead to bad fuel economy.
Check traffic reports before leaving
and avoid delays as much as possible.
When driving in a traffic jam, gently
release the brake pedal to allow the
vehicle to move forward slightly while
avoiding overuse of the accelerator
pedal. Doing so can help control
excessive gasoline consumption.

Hybrid Electric Vehicle driv-
ing tips

For economical and ecological
driving, pay attention to the follow-
ing points:

Using Eco drive mode

Use of Hybrid System Indicator

Shift lever operation

Accelerator pedal/brake pedal
operation

When braking

Delays

Lexus UX250h (2023 year). Manual in english - page 15