Content .. 12 13 14 15 ..

LEXUS LS 500 (2019 year). Instruction - part 14

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4-5. Using the driving support systems

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• 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

• 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

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Driving

• 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

• 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 engine 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

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• 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.296), the pre-col-

lision brake assist and pre-collision brak-

ing 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.

: If equipped

When the system detects a vehicle
approaching from the left or right in
front of your vehicle when approaching
an intersection, a notification will be
displayed on the head-up display and
panoramic view monitor

: Refer to “NAVIGATION AND MULTI-

MEDIA SYSTEM OWNER’S MAN-
UAL”.

When the system determines that your
vehicle may be about to enter an inter-
section even though a vehicle is
approaching from the left or right in
front of your vehicle, a buzzer will
sound and a message will be displayed
on the multi-information display to
urge you to depress the brake pedal.
 Head-up display

FCTA (Front Cross Traffic
Alert)

When approaching an intersection
at low speed, the radar sensors on
the front side of the vehicle can
detect approaching vehicles to the
left and right of the front of the vehi-
cle. In this case, the head-up display
is used to inform the driver of
detected vehicles.

FCTA system functions

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 Multi-information display

■

The FCTA function is operational when

The system operates when all of the follow-

ing conditions are met.

●

Setting for “PCS” and “CAUTION” in

(

P.80) of the multi-information

display are set to “ON”.

●

A shift position other than P or R is

selected.

●

Vehicle speed is approximately 9 mph

(15 km/h) or lower.

●

A vehicle is approaching from the left or

right in front of your vehicle at a speed

between approximately 6 mph (10 km/h)

and 37 mph (60 km/h).

●

There are no preceding vehicles ahead of

your vehicle.

●

The accelerator pedal is not strongly

depressed.

●

The brake pedal is not being strongly

depressed.

■

Situations in which the system may

operate even though no vehicles are

approaching

In certain situations, such as the following,

the system may operate even though no

vehicles are approaching:

●

When approaching objects on the road-

side, such as guardrails, traffic signs, util-

ity poles, street lights, trees, or walls

●

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

●

When passing an object on the side of the

road, such as a parked vehicle

●

When a vehicle or pedestrian is

approaching from the left or right in front

of your vehicle from far away

●

When a vehicle or pedestrian is moving

within a parking spot, etc. next to the lane

your vehicle is driving in

●

When a pedestrian or bicyclist is moving

on a sidewalk

●

When a vehicle or pedestrian is moving

away from your vehicle

●

When a vehicle approaching from the left

or right in front of your vehicle is deceler-

ating or stops

●

When a vehicle approaching from the left

or right in front of your vehicle makes a

WARNING

■

Cautions regarding the use of the

function

The driver is solely responsible for safe

driving. Always drive safely, taking care

to observe your surroundings.
The FCTA system is a supplementary

system that informs the driver of vehicles

approaching from the left and right of the

front of the vehicle.
Do not overly rely on the FCTA system.

Over reliance on the system may lead to

an accident, resulting in death or serious

injury.
The details of the warning display may

differ from the actual traffic conditions.
Although the warning display will stop

being displayed after a certain amount of

time, this does not indicate that vehicles

or pedestrians are no longer around your

vehicle.

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left/right turn immediately in front of your

vehicle

●

When a pedestrian is approaching your

vehicle

●

When an oncoming vehicle makes a

left/right turn

●

When your vehicle enters an intersection

before a vehicle approaching from the

left or right in front of your vehicle

●

When stopped at traffic light and a vehi-

cle approaches from the left or right in

front of your vehicle

●

When driving in a location where there

are objects which reflect radar, such as

vehicles, guardrails, walls, traffic signs,

etc.

●

When making a left/right turn in front of

an approaching vehicle

●

When passing an oncoming vehicle

●

When being overtaken by another vehi-

cle

●

When driving next to another vehicle or a

pedestrian

●

When a vehicle or pedestrian

approaches the side of your vehicle

Some objects, such as the following, may be

detected and cause the FCTA system to

operate:

●

Pedestrians

■

Situations in which the system may not

operate properly

In some situations, such as the following, a

vehicle may not be detected by a front side

radar sensor, preventing the system from

operating properly:

●

If the front end or side of an approaching

vehicle is small (sports cars, etc.)

●

If the front end of an approaching vehicle

is low (low-slung sports cars, etc.)

●

If the ground clearance of an approach-

ing vehicle is extremely high

●

If the shape of an approaching vehicle is

unusual (tractors, motorcycles with side-

cars, etc.)

●

If a vehicle suddenly enters the detection

area on the left or right in front of your

vehicle from a parking lot, etc.

●

If an approaching vehicle moves sud-

denly (sudden steering, acceleration,

deceleration, etc.)

●

When driving in inclement weather such

as heavy rain, fog, snow or a sandstorm

●

After the engine has been started and the

vehicle has not been driven for a certain

amount of time

●

When driving on a road with a grade that

changes sharply (sharp incline/decline)

●

When driving around a sharp curve or on

an undulating road

●

If a vehicle is approaching from the left or

right of the front of your vehicle diago-

nally

●

When a vehicle is approaching from the

left or right in front of your vehicle from

far away

●

When there is an object between your

vehicle and an approaching vehicle

●

When driving in a location where there

are objects which reflect radar, such as

guardrails, walls, vehicles, etc.

●

When a group of vehicles which are close

together approach

●

Immediately after the FCTA system has

been enabled

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■

If the PCS warning light illuminates and

a message is displayed on the

multi-information display

The system may be temporarily unavailable

or may be malfunctioning.

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 and
when changing lanes (vehicles with
Lexus Safety System + A).

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

using the front camera. Addition-
ally, it detects preceding and sur-
rounding vehicles (vehicles with
Lexus Safety System + A) using the
front camera and radar.

: Boundary between asphalt and the

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

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WARNING

■

Before using LTA system

Do not rely solely upon the LTA system.

The LTA system does not automatically

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 driv-

ing safely by paying careful attention to

the surrounding conditions and operat-

ing 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.

■

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.

●

When tires of a size other than speci-

fied are installed.

●

Vehicle is driven in traffic lanes other

than that highways and freeways.

●

During emergency towing.

■

Situations in which the lane change

assist function should not be used

●

When driving on a one lane road or

road without lane markers

●

When there is no broken white line

between your vehicle and the lane

toward which the turn signal is oper-

ated

■

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.

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Driving

WARNING

●

When the follow-up cruising display is

displayed (

P.231) and the preceding

vehicle changes lanes. (Your vehicle

may follow the preceding vehicle and

also change lanes.)

●

When the follow-up cruising display is

displayed (

P.231) and the preceding

vehicle is swaying. (Your vehicle may

sway accordingly and depart from the

lane.)

●

When the follow-up cruising display is

displayed (

P.231) and the preceding

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.231) and the preceding

vehicle is being driven extremely close

to the left/right lane line. (Your vehicle

may follow the preceding vehicle 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,

curbs, reflective poles, etc.).

●

Vehicle is driven where the road

diverges, merges, etc.

●

Repair marks of asphalt, white (yellow)

line marks, 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.

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■

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.
When the system determines 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
operating.

: Boundary between asphalt and the side

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

WARNING

●

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

through operation of the steering

wheel by the driver or crossed an

intersection.

●

Tires which differ by structure, manu-

facturer, brand or tread pattern are

used.

●

Snow tires, etc. are equipped.

●

The vehicle is being driven at

extremely high speeds.

Functions included in LTA system

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■

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, the steering assist
function may be canceled temporarily, a
warning message may be displayed on the
multi-information display and a warning
buzzer may sound. If the steering assist
function is canceled, release the steering
wheel and then grip it again to enable the
function.
When the system determines that the vehi-
cle 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 operating.

: Boundary between asphalt and the side

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

■

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.

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■

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
warning buzzer sounds. Make sure to grip
the steering wheel firmly.

■

Lane change assist function (vehi-
cles with Lexus Safety System + A)

This function is linked to the dynamic
radar cruise control with full-speed
range and provides assistance for per-
forming lane changes by operating the
steering wheel when you hold the turn
signal lever partway (lane change posi-
tion).(

P.173)

When lane change assist function is
operating, the acceleration and decel-
eration of the vehicle is controlled
while the preceding vehicle and vehi-
cles driven in the lane toward which the
turn signal is operated are monitored.

When the lane centering function is not
operating, the lane change assist function
will not operate.
The lane change assist function should not
be operated when changing lanes on a
road that is diverging or merging.

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Driving

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
engine is started.

■

Lane change assist function (vehi-
cles with Lexus Safety System + A)

Hold the turn signal lever partway
(lane change position) for approxi-
mately 1 second.(

P.173)

The direction you are signaling will be dis-
played on the multi-information display.

LTA indicator

The illumination condition of the indicator
informs the driver of the system operation
status.

Turning LTA system on

Indications on multi-information
display

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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 white 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.



Inside of displayed white lines is
black

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

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.

■

Lane change assist function (vehi-
cles with Lexus Safety System + A)

 Lane change assist display

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Driving

Indicates that steering wheel assist of the
lane change assist function is operating.

 Approaching vehicle warning dis-

play

Indicates that an approaching vehicle is
detected in the adjacent lane.

■

Warning display (vehicles with
Lexus Safety System + A)

When the lane centering function is oper-
ating and the system determines that the
vehicle may depart from its lane due to a
sharp curve, etc., a warning display urging
the driver to operate the steering wheel,
will be displayed.
This display will also be displayed when
operation of the lane change assist func-
tion is canceled.
In some situations a warning display may
not be displayed.

Some displays, which are the same as
those displayed on the multi-informa-
tion display, will be displayed.

■

LTA system curve display on the
head-up display

The curve display on the head-up display
changes according to the direction and
curvature of the curve.

■

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. (Except

when a vehicle is in the lane on the side

the turn signal was operated)

• Vehicle is not being driven around a

sharp curve.

• No system malfunctions are detected.

(

P.237)

: The function operates even if the vehi-

Indications on head-up display
(vehicles with Lexus Safety Sys-
tem + A)

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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.80)

• 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.236)

●

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.80)

• 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.237)

●

Lane centering function

This function operates when all of the fol-
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.80)

• 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.237)

• 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.236)

• The driver has one or both hands on the

steering wheel.

• The vehicle is being driven in the center

of a lane.

• Steering assist function is not operating.

●

Lane change assist function (vehicles with

Lexus Safety System + A)

This function will operate when all of the
following conditions are met:
• The lane centering function is operating.

• “Lane Change Assist” is set to “ON” in

of the multi-information dis-

play.(

P.80)

• The vehicle speed is between approxi-

mately 57 and 85 mph (90 and 140

km/h).

• White (yellow) lane lines are detected by

the system.

• A broken white line is detected between

your vehicle and the lane toward which

the turn signal is operated.

• The turn signal lever is held partway (lane

change position) for approximately 1 sec-

ond.

• A vehicle is not overtaking your vehicle

or detected in the lane toward which the

turn signal is operated.

• The vehicle is being driven straight or

around a slight curve.

• The vehicle is not accelerating or decel-

erating more than a certain amount.

• The steering wheel is not being turned

sufficiently to perform a lane change.

235

4-5. Using the driving support systems

LS500_OM_(U)_1809

Driving

• 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.236)

• The dynamic radar cruise control with

full-speed range approach warning is not

operating.

• The lane departure alert function is not

operating.

■

Temporary cancellation 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.233)

●

If the operation conditions (

P.233) 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.

●

If the operating conditions (

P.233) are

no longer met, the lane change assist

function will be canceled. (vehicles with

Lexus Safety System + A)

If a message urging operation of the steer-

ing wheel is displayed, operate the steering

wheel.

■

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

overrided by the driver’s steering wheel

operation.

●

When the vehicle speed is approximately

31 mph (50 km/h) or less, the warning

display of the lane centering function will

not operate.

●

Do not attempt to test the operation of

the steering assist function.

●

The steering assist function may operate

when attempting to cut closely in front of

another vehicle while changing lanes.

■

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.

●

It may not be possible for the system to

determine if there is a danger of a colli-

sion with a vehicle in an adjacent lane.

●

Do not attempt to test the operation of

the lane departure alert function.

●

This function may operate if, when chang-

ing lanes, your vehicle cuts closely in front

of another vehicle.

: Boundary between asphalt and the side

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

■

Lane change assist function (vehicles

with Lexus Safety System + A)

Depending on the vehicle speed, vehicle

condition, road conditions, or conditions of

the area around the vehicle, the lane

change assist function may not operate or it

may be difficult to recognize that it has

operated.
If steering control operation is excessive or

insufficient, it can be corrected by the

driver’s operation of the steering wheel.
In situations such as the following, the lane

change assist function may be canceled:

●

When the system no longer detects white

(yellow) lane lines

●

When the turn signal lever is operated

fully (right/left turn position)

●

When the vehicle speed is outside of the

operational range of the function

●

When the system detects operation of

the steering wheel, brake or accelerator

pedal by the driver

While the lane change assist function is

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