LEXUS UX 200 (2019 year). Instruction

236

4-5. Using the driving support systems

■

When traveling at a low speed and
the brake pedal is not depressed,
or is depressed late

■

When the accelerator pedal is
depressed excessively

■

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

P.220

Types of sensors

WARNING

■

To ensure the Parking Support Brake

(static objects) can operate properly

Observe the following precautions

regarding the sensors (

P.220). Failure

to do so may cause a sensor to not oper-

ate properly, and may cause an accident.

●

Do not modify, disassemble or paint

the sensors.

●

Do not replace a sensor with a part

other than a genuine part.

●

Do not subject a sensor or its sur-

rounding area to a strong impact.

●

Do not damage the sensors, and

always keep them clean.

●

If the area around a radar sensor is

subjected to an impact, the system

may not operate properly due to a

sensor malfunction. Have the vehicle

inspected by your Lexus dealer.

237

4-5. Using the driving support systems

Driving

■

The Parking Support Brake function

(static object) will operate when

The function will operate when the PKSB

OFF indicator is not illuminated or flashing

(

P.69, 70) and all of the following condi-

tions are met:

●

Engine output restriction control

• The Parking Support Brake is enabled.

• The vehicle speed is 10 mph (15 km/h) or

less.

• There is a static object in the traveling

direction of the vehicle and 6 to 13 ft. (2

to 4 m) away.

• The Parking Support Brake determines

that a stronger-than-normal brake opera-

tion is necessary to avoid a collision.

●

Brake control

• Engine output restriction control is oper-

ating.

• The Parking Support Brake determines

that an immediate brake operation is nec-

essary 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:

●

Engine 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 6 to 13 ft. (2

to 4 m) away from the vehicle or in the

WARNING

■

Handling the suspension

Do not modify the suspension, as

changes to the height or inclination of the

vehicle may prevent the sensors from

detecting objects correctly or cause the

system to not operate or operate unnec-

essarily.

■

If the Parking Support Brake function

(static objects) operates unnecessar-

ily, such as at a railroad crossing

In the event that the Parking Support

Brake function (static objects) operates

unnecessarily, such as at a railroad cross-

ing, brake control will be canceled after

approximately 2 seconds, allowing you

to proceed forward and leave the area,

brake control can also be canceled by

depressing the brake pedal. Depressing

the accelerator pedal after brake control

is canceled will allow you to proceed for-

ward and leave the area.

■

Notes when washing the vehicle

Do not apply intensive bursts of water or

steam to the sensor area.
Doing so may result in the sensor mal-

functioning.

●

When using a high pressure washer to

wash the vehicle, do not spray the sen-

sors directly, as doing so may cause a

sensor to malfunction.

●

When using steam to clean the vehicle,

do not direct steam too close to the

sensors as doing so may cause a sen-

sor to malfunction.

■

When to disable the Parking Support

Brake (static objects)

In the following situations, disable the

Parking Support Brake (static objects) 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 an automatic car wash

238

4-5. Using the driving support systems

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 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.224) Therefore, even if the intui-

tive parking assist detects an object and

provides a warning, the Parking Support

Brake function (static objects) may not start

operating.

■

Objects that the Parking Support Brake

function (static objects) may not detect

The sensors may not be able to detect cer-

tain objects, such as the following:

●

Pedestrian

●

Cotton cloth, snow, and other materials

that are poor reflectors of ultrasonic

waves

●

Objects which are not perpendicular to

the ground, are not perpendicular to the

traveling direction of the vehicle, are

uneven or are waving

●

Low objects

●

Thin objects such as wires, fences, ropes

and signposts

●

Objects that are extremely close to the

bumper

■

Situations in which the Parking Support

Brake function (static objects) may not

operate

When driving with the shift lever in N

■

Intuitive parking assist buzzer

Regardless of whether the intuitive parking

assist function is enabled or not (

P.221), if

the Parking Support Brake function (static

objects) is enabled (

P.232), the front or

rear sensors detect an object and engine

output restriction control or brake control is

performed, the intuitive parking assist

buzzer will sound to notify the driver of the

approximate distance to the object.

■

Situations in which the Parking Support

Brake function (static objects) may

operate even if there is no possibility of a

collision

In some situations, such as the following, the

Parking Support Brake function (static

objects) may operate even though there is

no possibility of a collision.

●

Vehicle surroundings

• When driving on a narrow road

• When driving on a gravel road or in an

area with tall grass

• When driving toward a banner, flag, low-

hanging branch or boom barrier (such as

those used at railroad crossings, toll gates

and parking lots)

• When driving on a narrow path sur-

rounded by a structure, such as in a tun-

nel or on an iron bridge

• When parallel parking

• When there is a rut or hole in the surface

of the road

• When driving on a metal cover (grating),

such as those used for drainage ditches

• When driving on a steep slope

• If a sensor is hit by a large amount of

water, such as when driving on a flooded

road

239

4-5. Using the driving support systems

Driving

●

Weather

• If a sensor is covered with ice, snow, dirt,

etc. (when cleared, the system will return

to normal)

• If heavy rain or water strikes a sensor

• When driving in inclement weather such

as fog, snow or a sandstorm

●

Other ultrasonic wave sources

• When vehicle horns, vehicle detectors,

motorcycle engines, air brakes of large

vehicles, the clearance sonar of other

vehicles or other devices which produce

ultrasonic waves are near the vehicle

• If a sticker or an electronic component,

such as a backlit license plate (especially

fluorescent type), fog lights, fender pole

or wireless antenna is installed near a

sensor

●

Changes in the vehicle posture

• If the vehicle is significantly tilted

• If the front of the vehicle is raised or low-

ered due to the carried load

• If the orientation of a sensor has been

changed due to a collision or other

impact

■

Situations in which the Parking Support

Brake function (static objects) may not

operate properly

In some situations, such as the following, this

function may not operate properly.

●

Weather

• When a sensor or the area around a sen-

sor is extremely hot or cold

• When strong winds are blowing

• If a sensor is covered with ice, snow, dirt,

etc. (when cleared, the system will return

to normal)

• If heavy rain or water strikes a sensor

• When driving in inclement weather such

as fog, snow or a sandstorm

●

Vehicle surroundings

• When an object that cannot be detected

is between the vehicle and a detected

object

• If an object such as a vehicle, motorcycle,

bicycle or pedestrian cuts in front of the

vehicle or runs out from the side of the

vehicle

●

Other ultrasonic waves sources

• When vehicle horns, vehicle detectors,

motorcycle engines, air brakes of large

vehicles, the clearance sonar of other

vehicles or other devices which produce

ultrasonic waves are near the vehicle

• If a sticker or an electronic component,

such as a backlit license plate (especially

fluorescent type), fog lights, fender pole

or wireless antenna is installed near a

sensor

●

Changes in the vehicle posture

• If the vehicle is significantly tilted

• If the front of the vehicle is raised or low-

ered due to the carried load

• If the orientation of a sensor has been

changed due to a collision or other

impact

240

4-5. Using the driving support systems

: 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.216

■

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.69, 70) and all of the following condi-

tions are met:

●

Engine output restriction control

• The Parking Support Brake is enabled.

• The vehicle speed is 10 mph (15 km/h) or

less.

• Vehicles which are approaching from the

right or left at the rear of the vehicle at a

traveling speed of more than approxi-

mately 5 mph (8 km/h)

• 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

Parking Support Brake func-
tion (rear-crossing vehicles)

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

Examples of function operation

Types of sensors

WARNING

■

To ensure the Parking Support Brake

(rear-crossing vehicles) can operate

properly

Observe the following precautions

regarding the rear radar sensors

(

P.216). Failure to do so may cause a

sensor to not operate properly, and may

cause an accident.

●

Do not modify, disassemble or paint

the sensors.

●

Do not replace a rear radar sensor

with a part other than a genuine part.

●

Do not damage the rear radar sensors,

and always keep the radar sensors and

their surrounding area on the bumper

clean.

■

To prevent a rear radar sensor from

malfunctioning

●

If the area around a rear radar sensor

is subjected to an impact, the system

may not operate properly due to a

sensor malfunction. Have the vehicle

inspected by your Lexus dealer.

●

Observe the rear radar sensor han-

dling precautions. (

P.216)

241

4-5. Using the driving support systems

Driving

an approaching vehicle.

●

Brake control

• Engine output restriction control is oper-

ating

• 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 operat-

ing when

The function will stop operating if any of the

following conditions are met:

●

Engine 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.228). 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.

■

Conditions under which the Parking

Support Brake function (rear-crossing

vehicles) will not detect a vehicle

The Parking Support Brake function (rear-

crossing vehicles) is not designed to detect

the following types of vehicles and/or

objects:

●

Vehicles approaching from directly

behind

●

Vehicles backing up in a parking space

next to your vehicle

●

Vehicles that the sensors cannot detect

due to obstructions

●

Vehicles which suddenly accelerate or

decelerate near your vehicle

●

Guardrails, walls, signs, parked vehicles
and similar stationary objects

●

Small motorcycles, bicycles, pedestrians,
etc.

●

Vehicles moving away from your vehicle

●

Vehicles approaching from the parking
spaces next to your vehicle

●

Objects which are extremely close to a
radar sensor

●

Vehicles which are approaching from the

right or left at the rear of the vehicle at a

traveling speed of less than approxi-

mately 5 mph (8 km/h)

●

Vehicles which are approaching from the

right or left at the rear of the vehicle at a

traveling speed of more than approxi-

mately 15 mph (24 km/h)

: Depending on the conditions, detection

of a vehicle and/or object may occur.

■

RCTA buzzer

Regardless of whether the RCTA function is

enabled or not (

P.227), if the Parking

Support Brake function is enabled

(

P.232) and brake control is performed,

a buzzer will sound to notify the driver.

■

Situations in which the system may

operate even though there is no possi-

bility of a collision

In some situations such as the following, the

Parking Support Brake function (rear-

crossing vehicles) may operate even

though there is no possibility of a collision.

●

When the parking space faces a street

242

4-5. Using the driving support systems

and vehicles are being driven on the

street

●

When a detected vehicle turns while

approaching the vehicle

●

When a vehicle passes by the side of your

vehicle

●

When the distance between your vehicle

and metal objects, such as a guardrail,

wall, sign, or parked vehicle, which may

reflect electrical waves toward the rear of

the vehicle, is short

●

When there are spinning objects near

your vehicle such as the fan of an air con-

ditioning unit

●

When water is splashed or sprayed

toward the rear bumper, such as from a

sprinkler

■

Situations in which the Parking Support

Brake function (rear-crossing vehicles)

may not operate properly

In some situations, such as the following, the

radar sensors may not detect an object and

this function may not operate properly

●

Stationary objects

●

When a sensor or the area around a sen-

sor is extremely hot or cold

●

If the rear bumper is covered with ice,

snow, dirt, etc.

●

When it is raining heavily or water strikes

the vehicle

●

When the detection area of a radar sen-

sor is obstructed by an adjacent vehicle

●

If the vehicle is significantly tilted

●

When equipment that may obstruct a

sensor is installed, such as a towing eye-

let, bumper protector (an additional trim

strip, etc.), bicycle carrier, or snow plow

●

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 low-

ered due to the carried load

●

If a sticker or an electronic component,

such as a backlit license plate (especially

fluorescent type), fog lights, fender pole

or wireless antenna is installed near a

radar sensor

●

If the orientation of a radar sensor has

been changed

●

When multiple vehicles are approaching

with only a small gap between each vehi-

cle

●

If a vehicle is approaching the rear of

your vehicle rapidly

●

Situations in which the radar sensor may

not detect a vehicle

• When a vehicle approaches from the

right or left at the rear of the vehicle while

you are turning while backing up

• When turning while backing up

243

4-5. Using the driving support systems

Driving

• When backing out of a shallow angle

parking spot

• When backing up on a slope with a sharp

change in grade

• When a vehicle turns into the detection

area

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 Normal
mode when not in Normal 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,

Driving mode select switch

The driving modes can be selected
to suit driving condition.

Selecting the driving mode

A
B

244

4-5. Using the driving support systems

the “Eco” indicator comes on.

Sport mode

Assists acceleration response by con-
trolling the transmission, engine and steer-
ing. Suitable for when precise handling is
desirable, for example when driving on
mountain roads.
When not in Sport mode, if the driving
mode select switch is turned backward, the
“Sport” 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.264)

●

Adjust the fan speed (

P.262, 265)

●

Turn off Eco drive mode

■

Automatic deactivation of Sport mode

If the engine switch is turned off after driv-

ing in Sport mode, the driving mode will be

changed to Normal mode.

■

Driving mode pop-up display (vehicles

with 10.3-inch display model)

When the driving mode is changed, the

selected driving mode will be temporarily

displayed on the side display. (

P.259)

■

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.

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 oper-
ating the vehicle.

Summary of the driving assist
systems

245

4-5. Using the driving support systems

Driving

■

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 pre-
vent 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

■

When the TRAC/VSC systems are

operating

The slip indicator light will flash while the

TRAC/VSC 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 engine 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 sys-

tem 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 sys-

tem 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.192)

■

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 infor-

mation continues to show, contact your

Lexus dealer.

246

4-5. Using the driving support systems

■

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.

●

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 engine is

started or just after the vehicle begins to

move. This sound does not indicate 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 mal-

function has occurred.

• Vibrations may be felt through the vehicle

body and steering.

• A motor sound may be heard also after

the vehicle comes to a stop.

• The brake pedal may pulsate slightly after

the ABS is activated.

• The brake pedal may move down slightly

after the ABS is activated.

■

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 engine 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 vehicle

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

■

Reduced effectiveness of the EPS sys-

tem

The effectiveness of the EPS system is

247

4-5. Using the driving support systems

Driving

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 engine off. The EPS system should

return to normal within 10 minutes.

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 roads.

■

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 main-

tain 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 potholes

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.

■

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/VSC is activated

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 conditions. As

these are the systems to help ensure

vehicle stability and driving force, do not

turn the TRAC/VSC systems off unless

necessary.

248

4-5. Using the driving support systems

WARNING

■

Secondary Collision Brake

Do not overly rely on the Secondary Col-

lision 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.

249

4-6. Driving tips

Driving

4-6.Driving tips

 Use fluids that are appropriate to

the prevailing outside temperatures.

• Engine oil
• Engine coolant
• Washer fluid

 Have a service technician inspect

the condition of the battery.

 Vehicles without run-flat tires: Have

the vehicle fitted with four snow tires
or purchase a set of tire chains for
the front tires.

Ensure that all tires are the same size and
brand, and that chains match the size of the
tires.

 Vehicles with run-flat tires: It is rec-

ommended that the vehicle is fitted
with four snow run-flat tires or pur-
chase a set of tire chains for the front
tires.

Ensure that all tires are the same size and
brand, and that chains match the size of the
tires.

Winter driving tips

Carry out the necessary prepara-
tions and inspections before driving
the vehicle in winter. Always drive
the vehicle in a manner appropriate
to the prevailing weather condi-
tions.

Preparation for winter

WARNING

■

Driving with snow tires

Observe the following precautions to

reduce the risk of accidents.

Failure to do so may result in a loss of

vehicle control and cause death or seri-

ous injury.

●

Use tires of the specified size.

●

Maintain the recommended level of air

pressure.

●

Do not drive in excess of 75 mph (120

km/h), regardless of the type of snow

tires being used.

●

Use snow tires on all, not just some

wheels.

■

Driving with tire chains

Observe the following precautions to

reduce the risk of accidents.

Failure to do so may result in the vehicle

being unable to be driven safely, and may

cause death or serious injury.

●

Do not drive in excess of the speed

limit specified for the tire chains being

used, or 30 mph (50 km/h), which-

ever is lower.

●

Avoid driving on bumpy road surfaces

or over potholes.

●

Avoid sudden acceleration, abrupt

steering, sudden braking and shifting

operations that cause sudden engine

braking.

●

Slow down sufficiently before entering

a curve to ensure that vehicle control is

maintained.

●

Do not use LTA (Lane Tracing Assist).

250

4-6. Driving tips

Perform the following according to the
driving conditions:
 Do not try to forcibly open a window

or move a wiper that is frozen. Pour
warm water over the frozen area to
melt the ice. Wipe away the water
immediately to prevent it from
freezing.

 To ensure proper operation of the

climate control system fan, remove
any snow that has accumulated on
the air inlet vents in front of the
windshield.

 Check for and remove any excess

ice or snow that may have accumu-
lated on the exterior lights, vehicle’s
roof, chassis, around the tires or on
the brakes.

 Remove any snow or mud from the

bottom of your shoes before getting
in the vehicle.

Accelerate the vehicle slowly, keep a
safe distance between you and the
vehicle ahead, and drive at a reduced
speed suitable to road conditions.

 Park the vehicle and move the shift

lever to P without setting the park-
ing brake. The parking brake may
freeze up, preventing it from being
released. If the vehicle is parked
without setting the parking brake,
make sure to block the wheels.
Failure to do so may be dangerous
because it may cause the vehicle to
move unexpectedly, possibly lead-
ing to an accident.

When the parking brake is in automatic
mode, release the parking brake after shift-
ing the shift lever to P. (

P.160)

 If the vehicle is left parked with the

brakes damp in cold temperatures,
there is a possibility of the brakes
freezing.

 If the vehicle is parked without set-

ting the parking brake, confirm that
the shift lever cannot be moved out
of P

: The shift lever will be locked if it is

attempted to be shifted from P to any
other position without depressing the
brake pedal. If the shift lever can be
shifted from P, there may be a problem
with the shift lock system. Have the vehi-
cle inspected by your Lexus dealer
immediately.

NOTICE

■

Repairing or replacing snow tires

Request repairs or replacement of snow

tires from Lexus dealers or legitimate tire

retailers.

This is because the removal and attach-

ment of snow tires affects the operation

of the tire pressure warning valves and

transmitters.

Before driving the vehicle

When driving the vehicle

When parking the vehicle

WARNING

■

When parking the vehicle

When parking the vehicle without apply-

ing the parking brake, make sure to

chock the wheels. If you do not chock the

wheels, the vehicle may move unexpect-

edly, possibly resulting in an accident.

251

4-6. Driving tips

Driving

Use the correct tire chain size when
mounting the tire chains. Chain size is
regulated for each tire size.

Side chain:

0.12 in. (3 mm) in diameter

0.39 in. (10 mm) in width

0.98 in. (25 mm) in length

Cross chain:

0.16 in. (4 mm) in diameter

0.55 in. (14 mm) in width

0.98 in. (25 mm) in length

Regulations regarding the use of tire
chains vary depending on location and
type of road. Always check local regu-
lations before installing chains.

■

Tire chain installation

Observe the following precautions when

installing and removing chains:

●

Install and remove tire chains in a safe

location.

●

Install tire chains on the front tires only.

Do not install tire chains on the rear tires.

●

Install tire chains on front tires as tightly as

possible. Retighten chains after driving

1/4 - 1/2 mile (0.5 - 1.0 km).

●

Install tire chains following the instruc-

tions provided with the tire chains.

To enable the windshield wipers to be
lifted when heavy snow or icy condi-
tions are expected, change the rest
position of the windshield wipers from
the retracted position below the hood
to the service position using the wiper
lever. (

P.174)

Selecting tire chains

Regulations on the use of tire
chains

NOTICE

■

Fitting tire chains

The tire pressure warning valves and

transmitters may not function correctly

when tire chains are fitted.

Windshield wipers

LEXUS UX 200 (2019 year). Instruction - part 15