Lexus RX450h L (2022 year). Manual in english

220

4-5. Using the driving support systems

■

Enabling/disabling the pre-colli-
sion system

The pre-collision system can be
enabled/disabled on

(



P.88) of

the multi-information display.

The system is automatically enabled each
time the power switch is turned to ON
mode.

If the system is disabled, the PCS warn-
ing light will turn on and a message will
be displayed on the multi-information
display.

■

Changing the pre-collision warn-
ing timing

The pre-collision warning timing can
be changed on

(



P.88) of the

multi-information display.

The warning timing setting is retained
when the power switch is turned off. How-
ever, if the pre-collision system is disabled
and re-enabled, the operation timing will
return to the default setting (middle).

Early

Middle

This is the default setting.

Late

■

Operational conditions

The pre-collision system is enabled and the system determines that the possibility of a frontal

WARNING

●

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 tires of a size other than speci-

fied are installed

●

When tire chains are installed

●

When a compact spare tire or an

emergency tire puncture repair kit is

used

●

If equipment (snow plow, etc.) that may

obstruct the radar sensor or front cam-

era is temporarily installed to the vehi-

cle

Changing settings of the pre-col-
lision system

221

4-5. Using the driving support systems

Driving

collision with a detected object is high.

Each function is operational at the following speed

●

Pre-collision warning

●

Pre-collision brake assist

●

Pre-collision braking

The system may not operate in the following situations:

●

If a 12-volt battery terminal has been disconnected and reconnected and then the vehicle

has not been driven for a certain amount of time

●

If the shift lever is in R

●

When the VSC OFF indicator is illuminated (only the pre-collision warning function will

be operational)

■

Object detection function

The system detects objects based on their

size, profile, motion, etc. However, an object

may not be detected depending on the sur-

rounding brightness and the motion, pos-

ture, and angle of the detected object,

preventing the system from operating prop-

erly. (



P.223)

The illustration shows an image of detect-

able objects.

Detectable objects

Vehicle speed

Relative speed between your

vehicle and object

Vehicles

Approx. 7 to 110 mph (10 to
180 km/h)

Bicyclists and pedestrians

Approx. 7 to 50 mph (10 to
80 km/h)

Detectable objects

Vehicle speed

Relative speed between your

vehicle and object

Vehicles

Approx. 20 to 110 mph (30
to 180 km/h)

Bicyclists and pedestrians

Approx. 20 to 50 mph (30
to 80 km/h)

Detectable objects

Vehicle speed

Relative speed between your

vehicle and object

Vehicles

Approx. 7 to 110 mph (10 to
180 km/h)

Bicyclists and pedestrians

Approx. 7 to 50 mph (10 to
80 km/h)

222

4-5. Using the driving support systems

■

Cancelation of the pre-collision braking

If either of the following occur while the

pre-collision braking function is operating, it

will be canceled:

●

The accelerator pedal is depressed

strongly.

●

The steering wheel is turned sharply or

abruptly.

■

Conditions under which the system may

operate even if there is no possibility of a

collision

●

In some situations such as the following,

the system may determine that there is a

possibility of a frontal collision and oper-

ate.

• When passing a detectable object, etc.

• When changing lanes while overtaking a

detectable object, etc.

• When approaching a detectable object

in an adjacent lane or on the roadside,

such as when changing the course of

travel or driving on a winding road

• When rapidly closing on a detectable

object, etc.

• When approaching objects on the road-

side, such as detectable objects, guard-

rails, utility poles, trees, or walls

• When there is a detectable object or

other object by the roadside at the

entrance of a curve

• When there are patterns or paint in front

of your vehicle that may be mistaken for a

detectable object

• When the front of your vehicle is hit by

water, snow, dust, etc.

• When overtaking a detectable object

that is changing lanes or making a

right/left turn

• When passing a detectable object in an

oncoming lane that is stopped to make a

right/left turn

• When a detectable object approaches

very close and then stops before entering

the path of your vehicle

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

ered, such as when on an uneven or

undulating road surface

• When driving on a road surrounded by a

structure, such as in a tunnel or on an iron

bridge

• When there is a metal object (manhole

cover, steel plate, etc.), steps, or a protru-

sion in front of your vehicle

• When passing under an object (road

sign, billboard, etc.)

• When approaching an electric toll gate

barrier, parking area barrier, or other

barrier that opens and closes

223

4-5. Using the driving support systems

Driving

• When using an automatic car wash

• When driving through or under objects

that may contact your vehicle, such as

thick grass, tree branches, or a banner

• When driving through steam or smoke

• When driving near an object that reflects

radio waves, such as a large truck or

guardrail

• When driving near a TV tower, broad-

casting station, electric power plant, or

other location where strong radio waves

or electrical noise may be present

■

Situations in which the system may not

operate properly

●

In some situations such as the following,

an object may not be detected by the

radar sensor and front camera, prevent-

ing the system from operating properly:

• When a detectable object is approaching

your vehicle

• When your vehicle or a detectable object

is wobbling

• If a detectable object makes an abrupt

maneuver (such as sudden swerving,

acceleration or deceleration)

• When your vehicle approaches a detect-

able object rapidly

• When a detectable object is not directly

in front of your vehicle

• When a detectable object is near a wall,

fence, guardrail, manhole cover, vehicle,

steel plate on the road, etc.

• When a detectable object is under a

structure

• When part of a detectable object is hid-

den by an object, such as large baggage,

an umbrella, or guardrail

• When multiple detectable objects are

close together

• If the sun or other light is shining directly

on a detectable object

• When a detectable object is a shade of

white and looks extremely bright

• When a detectable object appears to be

nearly the same color or brightness as its

surroundings

• If a detectable object cuts or suddenly

emerges in front of your vehicle

• When the front of your vehicle is hit by

water, snow, dust, etc.

• When a very bright light ahead, such as

the sun or the headlights of oncoming

traffic, shines directly into the front cam-

era

• When approaching the side or front of a

vehicle ahead

• If a vehicle ahead is a motorcycle

• If a vehicle ahead is narrow, such as a per-

sonal mobility vehicle

• If a preceding vehicle has a small rear

end, such as an unloaded truck

• If a preceding vehicle has a low rear end,

such as a low bed trailer

• If a vehicle ahead has extremely high

ground clearance

• If a vehicle ahead is carrying a load which

protrudes past its rear bumper

• If a vehicle ahead is irregularly shaped,

such as a tractor or side car

224

4-5. Using the driving support systems

• If a vehicle ahead is a child sized bicycle,

a bicycle that is carrying a large load, a

bicycle ridden by more than one person,

or a uniquely shaped bicycle (bicycle with

a child seat, tandem bicycle, etc.)

• If a pedestrian/or the riding height of a

bicyclist ahead is shorter than approxi-

mately 3.2 ft. (1 m) or taller than approxi-

mately 6.5 ft. (2 m)

• If a pedestrian/bicyclist is wearing over-

sized clothing (a rain coat, long skirt,

etc.), making their silhouette obscure

• If a pedestrian is bending forward or

squatting or bicyclist is bending forward

• If a pedestrian/bicyclist is moving fast

• If a pedestrian is pushing a stroller, wheel-

chair, bicycle or other vehicle

• When driving in inclement weather such

as heavy rain, fog, snow or a sandstorm

• When driving through steam or smoke

• When the surrounding area is dim, such

as at dawn or dusk, or while at night or in

a tunnel, making a detectable object

appear to be nearly the same color as its

surroundings

• When driving in a place where the sur-

rounding brightness changes suddenly,

such as at the entrance or exit of a tunnel

• After the hybrid system has started the

vehicle has not been driven for a certain

amount of time

• While making a left/right turn and for a

few seconds after making a left/right turn

• While driving on a curve and for a few

seconds after driving on a curve

• If your vehicle is skidding

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

ered

• If the wheels are misaligned

• If a wiper blade is blocking the front cam-

era

• The vehicle is being driven at extremely

high speeds

• When driving on a hill

• If the radar sensor or front camera is mis-

aligned

●

In some situations such as the following,

sufficient braking force may not be

obtained, preventing the system from

performing properly:

• If the braking functions cannot operate to

their full extent, such as when the brake

parts are extremely cold, extremely hot,

or wet

• If the vehicle is not properly maintained

(brakes or tires are excessively worn,

improper tire inflation pressure, etc.)

• When the vehicle is being driven on a

gravel road or other slippery surface

■

If VSC is disabled

●

If VSC is disabled (



P.280), the

pre-collision brake assist and pre-colli-

sion braking functions are also disabled.

●

The PCS warning light will turn on and

“VSC Turned Off Pre-Collision Brake

System Unavailable” will be displayed on

the multi-information display.

225

4-5. Using the driving support systems

Driving

LTA (Lane Tracing Assist)

When driving on highways and
freeways with white (yellow) lane
lines, this function alerts the driver
when the vehicle might depart from
its lane or course

and provides

assistance by operating the steer-
ing wheel to keep the vehicle in its
lane or course

. Furthermore, the

system provides steering assistance
when dynamic radar cruise control
with full-speed range is operating
to keep the vehicle in its lane.

The LTA system recognizes white
(yellow) lane lines or a course

using the front camera. Addition-
ally, it detects preceding vehicles
using the front camera and radar.

: Boundary between asphalt and the

side of the road, such as grass, soil, or
a curb

WARNING

■

Before using LTA system

●

Do not rely solely upon the LTA sys-

tem. The LTA system does not auto-

matically drive the vehicle or reduce

the amount of attention that must be

paid to the area in front of the vehicle.

The driver must always assume full

responsibility for driving safely by pay-

ing careful attention to the surround-

ing conditions and operating the

steering wheel to correct the path of

the vehicle. Also, the driver must take

adequate breaks when fatigued, such

as from driving for a long period of

time.

●

Failure to perform appropriate driving

operations and pay careful attention

may lead to an accident, resulting in

death or serious injury.

●

When not using the LTA system, use

the LTA switch to turn the system off.

■

Situations unsuitable for LTA system

In the following situations, use the LTA

switch to turn the system off. Failure to do

so may lead to an accident, resulting in

death or serious injury.

●

Vehicle is driven on a road surface

which is slippery due to rainy weather,

fallen snow, freezing, etc.

●

Vehicle is driven on a snow-covered

road.

●

White (yellow) lines are difficult to see

due to rain, snow, fog, dust, etc.

●

Vehicle is driven in a temporary lane or

restricted lane due to construction

work.

●

Vehicle is driven in a construction

zone.

●

A spare tire, tire chains, etc. are

equipped.

●

When the tires have been excessively

worn, or when the tire inflation pres-

sure is low.

226

4-5. Using the driving support systems

WARNING

●

When your vehicle is towing a trailer

(vehicles with towing package) or

during emergency towing.

■

Preventing LTA system malfunctions

and operations performed by mistake

●

Do not modify the headlights or place

stickers, etc. on the surface of the

lights.

●

Do not modify the suspension etc. If

the suspension etc. needs to be

replaced, contact your Lexus dealer.

●

Do not install or place anything on the

hood or grille. Also, do not install a

grille guard (bull bars, kangaroo bar,

etc.).

●

If your windshield needs repairs, con-

tact your Lexus dealer.

■

Conditions in which functions may

not operate properly

In the following situations, the functions

may not operate properly and the vehicle

may depart from its lane. Drive safely by

always paying careful attention to your

surroundings and operate the steering

wheel to correct the path of the vehicle

without relying solely on the functions.

●

When the follow-up cruising display is

displayed (



P.230) and the preced-

ing vehicle changes lanes. (Your vehi-

cle may follow the preceding vehicle

and also change lanes.)

●

When the follow-up cruising display is

displayed (



P.230) and the preced-

ing vehicle is swaying. (Your vehicle

may sway accordingly and depart from

the lane.)

●

When the follow-up cruising display is

displayed (



P.230) and the preced-

ing vehicle departs from its lane. (Your

vehicle may follow the preceding vehi-

cle and depart from the lane.)

●

When the follow-up cruising display is

displayed (



P.230) and the preced-

ing vehicle is being driven extremely

close to the left/right lane line. (Your

vehicle may follow the preceding vehi-

cle and depart from the lane.)

●

Vehicle is being driven around a sharp

curve.

●

Objects or patterns that could be mis-

taken for white (yellow) lines are pres-

ent on the side of the road (guardrails,

reflective poles, etc.).

●

Vehicle is driven where the road

diverges, merges, etc.

227

4-5. Using the driving support systems

Driving

WARNING

●

Repair marks of asphalt, white (yellow)

lines, etc. are present due to road

repair.

●

There are shadows on the road that

run parallel with, or cover, the white

(yellow) lines.

●

The vehicle is driven in an area without

white (yellow) lines, such as in front of a

tollgate or checkpoint, or at an inter-

section, etc.

●

The white (yellow) lines are cracked,

“Botts’ dots”, “Raised pavement

marker” or stones are present.

●

The white (yellow) lines cannot be

seen or are difficult to see due to sand,

etc.

●

The vehicle is driven on a road surface

that is wet due to rain, puddles, etc.

●

The traffic lines are yellow (which may

be more difficult to recognize than

lines that are white).

●

The white (yellow) lines cross over a

curb, etc.

●

The vehicle is driven on a bright sur-

face, such as concrete.

●

If the edge of the road is not clear or

straight.

●

The vehicle is driven on a surface that

is bright due to reflected light, etc.

●

The vehicle is driven in an area where

the brightness changes suddenly, such

as at the entrances and exits of tunnels,

etc.

●

Light from the headlights of an oncom-

ing vehicle, the sun, etc. enters the

camera.

●

The vehicle is driven on a slope.

●

The vehicle is driven on a road which

tilts left or right, or a winding road.

●

The vehicle is driven on an unpaved or

rough road.

●

The traffic lane is excessively narrow

or wide.

●

The vehicle is extremely tilted due to

carrying heavy luggage or having

improper tire pressure.

●

The distance to the preceding vehicle

is extremely short.

●

The vehicle is moving up and down a

large amount due to road conditions

during driving (poor roads or road

seams).

●

When driving in a tunnel or at night

with the headlights off or when a head-

light is dim due to its lens being dirty or

it being misaligned.

●

The vehicle is struck by a crosswind.

●

The vehicle is affected by wind from a

vehicle driven in a nearby lane.

●

The vehicle has just changed lanes or

crossed an intersection.

●

Tires which differ by structure, manu-

facturer, brand or tread pattern are

used.

●

When tires of a size other than speci-

fied are installed.

●

Snow tires, etc. are equipped.

●

The vehicle is being driven at

extremely high speeds.

228

4-5. Using the driving support systems

■

Lane departure alert function

When the system determines that the
vehicle might depart from its lane or
course

, a warning is displayed on the

multi-information display, and either a
warning buzzer will sound or the steer-
ing wheel will vibrate to alert the driver.

When the warning buzzer sounds or the
steering wheel vibrates, check the area
around your vehicle and carefully operate
the steering wheel to move the vehicle
back to the center of the lane.
Vehicle with BSM: When the system deter-
mines that the vehicle might depart from its
lane and that the possibility of a collision
with an overtaking vehicle in the adjacent
lane is high, the lane departure alert will
operate even if the turn signals are operat-
ing.

: Boundary between asphalt and the side

of the road, such as grass, soil, or a curb

■

Steering assist function

When the system determines that the
vehicle might depart from its lane or
course

, the system provides assis-

tance as necessary by operating the
steering wheel in small amounts for a
short period of time to keep the vehicle
in its lane.

If the system detects that the steering
wheel has not been operated for a fixed
amount of time or the steering wheel is not
being firmly gripped, a warning is displayed
on the multi-information display and the
function is temporarily canceled.
Vehicle with BSM: When the system deter-
mines that the vehicle might depart from its
lane and that the possibility of a collision
with an overtaking vehicle in the adjacent
lane is high, the steering assist function will
operate even if the turn signals are operat-
ing.

: Boundary between asphalt and the side

of the road, such as grass, soil, or a curb

Functions included in LTA system

229

4-5. Using the driving support systems

Driving

■

Vehicle sway warning function

When the vehicle is swaying within a
lane, the warning buzzer will sound and
a message will be displayed on the
multi-information display to alert the
driver.

■

Lane centering function

This function is linked with dynamic
radar cruise control with full-speed
range and provides the required assis-
tance by operating the steering wheel
to keep the vehicle in its current lane.

When dynamic radar cruise control with
full-speed range is not operating, the lane
centering function does not operate.
In situations where the white (yellow) lane
lines are difficult to see or are not visible,
such as when in a traffic jam, this function
will operate to help follow a preceding
vehicle by monitoring the position of the
preceding vehicle.
If the system detects that the steering
wheel has not been operated for a fixed

amount of time or the steering wheel is not
being firmly gripped, a warning is displayed
on the multi-information display and the
function is temporarily canceled.

Press the LTA switch to turn the LTA
system on.

The LTA indicator illuminates and a mes-
sage is displayed on the multi-information
display.
Press the LTA switch again to turn the LTA
system off.
When the LTA system is turned on or off,
operation of the LTA system continues in
the same condition the next time the hybrid
system is started.

Turning LTA system on

230

4-5. Using the driving support systems

LTA indicator

The illumination condition of the indicator
informs the driver of the system operation
status.
Illuminated in white: LTA system is operat-
ing.
Illuminated in green: Steering wheel assis-
tance of the steering assist function or lane
centering function is operating.
Flashing in orange: Lane departure alert
function is operating.

Operation display of steering
wheel operation support

Displayed when the multi-information dis-
play is switched to the driving assist system
information screen.

Indicates that steering wheel assistance of
the steering assist function or lane center-
ing function is operating.
Both outer sides of the lane are displayed:
Indicates that steering wheel assist of the
lane centering function is operating.
One outer side of the lane is displayed:
Indicates that steering wheel assist of the
steering assist function is operating.
Both outer sides of the lane are flashing:
Alerts the driver that their input is neces-
sary to stay in the center of the lane (lane
centering function).

Lane departure alert function dis-
play

Displayed when the multi-information dis-
play is switched to the driving assist system
information screen.



Inside of displayed lines is white

Indicates that the system is recognizing
white (yellow) lines or a course

. When

the vehicle departs from its lane, the
white line displayed on the side the
vehicle departs from flashes orange.

Indications on multi-information
display

231

4-5. Using the driving support systems

Driving



Inside of displayed white lines is
black

Indicates that the system is not able to
recognize white (yellow) lines or a
course

or is temporarily canceled.

: Boundary between asphalt and the side

of the road, such as grass, soil, or a curb

Follow-up cruising display

Displayed when the multi-information dis-
play is switched to the driving assist system
information screen.
Indicates that steering assist of the lane
centering function is operating by monitor-
ing the position of a preceding vehicle.
When the follow-up cruising display is dis-
played, if the preceding vehicle moves,
your vehicle may move in the same way.
Always pay careful attention to your sur-
roundings and operate the steering wheel
as necessary to correct the path of the
vehicle and ensure safety.

■

Operation conditions of each function

●

Lane departure alert function

This function operates when all of the fol-

lowing conditions are met.

• LTA is turned on.

• Vehicle speed is approximately 32 mph

(50 km/h) or more.

• System recognizes white (yellow) lane

lines or a course

. (When a white [yel-

low] line or course

is recognized on

only one side, the system will operate

only for the recognized side.)

• Width of traffic lane is approximately 9.8

ft. (3 m) or more.

• Turn signal lever is not operated. (Vehicle

with BSM: Except when another vehicle

is in the lane on the side where the turn

signal was operated)

• Vehicle is not being driven around a

sharp curve.

• No system malfunctions are detected.

(



P.233)

: The function operates even if the vehi-

cle speed is less than approximately 32
mph (50 km/h) when the lane center-
ing function is operating.

: Boundary between asphalt and the side

of the road, such as grass, soil, or a curb

●

Steering assist function

This function operates when all of the fol-

lowing conditions are met in addition to the

operation conditions for the lane depar-

ture alert function.
• Setting for “Steering Assist” in

of the

multi-information display is set to “On”.

(



P.88)

• Vehicle is not accelerated or decelerated

by a fixed amount or more.

• Steering wheel is not operated with a

steering force level suitable for changing

lanes.

• ABS, VSC, TRAC and PCS are not oper-

ating.

• TRAC or VSC is not turned off.

• Hands off steering wheel warning is not

displayed. (



P.232)

●

Vehicle sway warning function

This function operates when all of the fol-

lowing conditions are met.
• Setting for “Sway Warning” in

of the

multi-information display is set to “On”.

(



P.88)

• Vehicle speed is approximately 32 mph

(50 km/h) or more.

• Width of traffic lane is approximately 9.8

ft. (3 m) or more.

• No system malfunctions are detected.

(



P.233)

●

Lane centering function

This function operates when all of the fol-

232

4-5. Using the driving support systems

lowing conditions are met.

• LTA is turned on.

• Setting for “Steering Assist” and “Lane

Center” in

of the multi-information

display are set to “On”. (



P.88)

• This function recognizes white (yellow)

lane lines or the position of a preceding

vehicle (except when the preceding vehi-

cle is small, such as a motorcycle).

• The dynamic radar cruise control with

full-speed range is operating in vehi-

cle-to-vehicle distance control mode.

• Width of traffic lane is approximately 10

to 13 ft. (3 to 4 m).

• Turn signal lever is not operated.

• Vehicle is not being driven around a

sharp curve.

• No system malfunctions are detected.

(



P.233)

• Vehicle does not accelerate or deceler-

ate by a fixed amount or more.

• Steering wheel is not operated with a

steering force level suitable for changing

lanes.

• ABS, VSC, TRAC and PCS are not oper-

ating.

• TRAC or VSC is not turned off.

• Hands off steering wheel warning is not

displayed. (



P.232)

• The vehicle is being driven in the center

of a lane.

• Steering assist function is not operating.

■

Temporary cancelation of functions

●

When operation conditions are no longer

met, a function may be temporarily can-

celed. However, when the operation con-

ditions are met again, operation of the

function is automatically restored.

(



P.231)

●

If the operation conditions (



P.231) are

no longer met while the lane centering

function is operating, the steering wheel

may vibrate and the buzzer may sound to

indicate that the function has been tem-

porarily canceled. However, if the “Alert”
customization setting is set to

the system will notify the driver by vibrat-

ing the steering wheel instead of sound-

ing the buzzer.

■

Steering assist function/lane centering

function

●

Depending on the vehicle speed, lane

departure situation, road conditions, etc.,

the driver may not feel the function is

operating or the function may not oper-

ate at all.

●

The steering control of the function is

overridden by the driver’s steering wheel

operation.

●

Do not attempt to test the operation of

the steering assist function.

■

Lane departure alert function

●

The warning buzzer may be difficult to

hear due to external noise, audio play-

back, etc. Also, it may be difficult to feel

steering wheel vibrations due to the road

conditions, etc.

●

If the edge of the course

is not clear or

straight, the lane departure alert function

may not operate.

●

Vehicle with BSM: It may not be possible

for the system to determine if there is a

danger of a collision with a vehicle in an

adjacent lane.

●

Do not attempt to test the operation of

the lane departure alert function.

: Boundary between asphalt and the side

of the road, such as grass, soil, or a curb

■

Hands off steering wheel warning

In the following situations, a warning mes-

sage urging the driver to hold the steering

wheel and the symbol shown in the illustra-

tion are displayed on the multi-information

display to warn the driver. The warning

stops when the system determines that the

driver holds the steering wheel. Always

keep your hands on the steering wheel

when using this system, regardless of warn-

ings.

233

4-5. Using the driving support systems

Driving

●

When the system determines that the

driver is driving without holding the steer-

ing wheel while the system is operating

If the driver continues to keep their hands
off of the steering wheel, the buzzer
sounds, the driver is warned and the func-
tion is temporarily canceled. This warning
also operates in the same way when the
driver continuously operates the steering
wheel only a small amount.
The buzzer also sounds even if the alert
type is set to

●

When the system determines that the

vehicle may deviate from the lane while

driving around a curve while the lane

centering function is operating.

Depending on the vehicle condition and

road conditions, the warning may not

operate. Also, if the system determines that

the vehicle is driving around a curve, warn-

ings will occur earlier than during

straight-lane driving.

●

When the system determines that the

driver is driving without holding the steer-

ing wheel while the steering wheel assist

of the steering assist function is operat-

ing.

If the driver continues to keep their hands
off of the steering wheel and the steering
wheel assist is operating, the buzzer
sounds and the driver is warned. Each time
the buzzer sounds, the continuing time of
the buzzer becomes longer.
The buzzer also sounds even if the alert
type is set to

■

Vehicle sway warning function

When the system determines that the vehi-

cle is swaying while the vehicle sway warn-

ing function is operating, a buzzer sounds

and a warning message urging the driver to

rest and the symbol shown in the illustration

are simultaneously displayed on the

multi-information display.

Depending on the vehicle and road condi-

tions, the warning may not operate.

■

Warning message

If the following warning message is dis-

played on the multi-information display and

the LTA indicator illuminates in orange, fol-

low the appropriate troubleshooting proce-

dure. Also, if a different warning message is

displayed, follow the instructions displayed

on the screen.

●

“LTA Malfunction Visit Your Dealer”

The system may not be operating properly.

Have the vehicle inspected by your Lexus

dealer.

●

“LTA Unavailable”

The system is temporarily canceled due to

a malfunction in a sensor other than the

front camera. Turn the LTA system off, wait

for a little while, and then turn the LTA sys-

tem back on.

●

“LTA Unavailable at Current Speed”

The function cannot be used as the vehicle

speed exceeds the LTA operation range.

Drive slower.

■

Customization

Function settings can be changed. (Cus-

tomizable features:



P.472)

234

4-5. Using the driving support systems

: If equipped

When the front camera recognizes a
sign, the sign will be displayed on the
multi-information display.



When the driving assist system

information is selected, a maximum
of 3 signs can be displayed.
(



P.88)



When a tab other than the driving
assist system information is selected,
the following types of road signs will
be displayed (



P.88)

• Speed limit sign
• Do Not Enter sign (when notification is

necessary)

If signs other than speed limit signs are rec-
ognized, they will be displayed in an over-
lapping stack under the current speed limit
sign.

The following types of road signs,
including electronic signs and blinking
signs, are recognized.

A non-official or a recently introduced traf-
fic sign may not be recognized.

RSA (Road Sign Assist)

The RSA system recognizes spe-
cific road signs using the front cam-
era to provide information to the
driver via the display.

If the system judges that the vehicle
is being driven over the speed limit,
performing prohibited actions, etc.
according to the recognized road
signs, it notifies the driver through a
visual notification and notification
buzzer.

WARNING

■

Before using the RSA

Do not rely solely upon the RSA system.

RSA is a system which supports the

driver by providing information, but it is

not a replacement for a driver’s own

vision and awareness. Drive safely by

always paying careful attention to the

traffic rules.

Indication on the multi-informa-
tion display

Supported types of road signs

235

4-5. Using the driving support systems

Driving

In the following situations, the RSA sys-
tem will notify the driver.



When the vehicle speed exceeds
the speed notification threshold of
the speed limit sign displayed, the
sign display will be emphasized and
a buzzer will sound.



When the RSA system recognizes a
do not enter sign and determines
that your vehicle has entered a
no-entry area, the displayed sign will
flash and a buzzer will sound.

Depending on the situation, a notifica-
tion function may not operate properly.

■

Setting procedure

Press

of the meter control

switches and select

Press

of the meter control

switches and select

, then press

Press

of the meter control

switches and select “RSA”, then press

■

Automatic turn-off of RSA sign display

In the following situations, a displayed

speed limit sign and/or do not enter sign will

stop being displayed automatically:

●

No sign has been recognized for a cer-

tain distance.

●

The road changes due to a left or right

turn, etc.

In the following situations, stop and yield

signs will stop being displayed automati-

cally:

●

The system determines that your vehicle

has passed the sign.

●

The road changes due to a left or right

turn, etc.

■

Conditions in which the function may

not operate or detect correctly

In the following situations, RSA does not

operate normally and may not recognize

signs, display the incorrect sign, etc. How-

ever, this does not indicate a malfunction.

●

The front camera is misaligned due to a

strong impact being applied to the sen-

sor, etc.

●

Dirt, snow, stickers, etc. are on the wind-

shield near the front camera.

●

In inclement weather such as heavy rain,

fog, snow or sand storms.

●

Light from an oncoming vehicle, the sun,

etc. enters the front camera.

●

The sign is dirty, faded, tilted or bent.

●

The contrast of electronic sign is low.

●

All or part of the sign is hidden by the

leaves of a tree, a pole, etc.

●

The sign is only visible to the front camera

for a short amount of time.

●

The driving scene (turning, lane change,

etc.) is judged incorrectly.

●

If a sign not appropriate for the currently

traveled lane, but the sign exists directly

after a freeway branches, or in an adja-

cent lane just before merging.

●

Stickers are attached to the rear of the

preceding vehicle.

●

A sign resembling a system compatible

sign is recognized.

Speed limit

Do Not Enter

Stop

Yield

Notification function

Lexus RX450h L (2022 year). Manual in english - page 13