LEXUS LS 500H (2019 year). Instruction

220

4-5. Using the driving support systems

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• When passing an object on the side of the

road, such as a parked vehicle

• When passing an oncoming vehicle on a

S curve

• When there is an object that may be mis-

taken for a pedestrian, such as a utility

pole, tree, or pole on the roadside or at

the entrance of a curve

• When there is a bicycle or motorcycle on

the roadside at the entrance of a curve

• If the preceding vehicle is a bicycle or

motorcycle

●

The system may operate the pedestrian

alert unnecessarily if it detects the follow-

ing:

• Pedestrians on a sidewalk

• Bicycles and motorcycles

• Patterns or paint on the road, a wall,

median, billboard, etc. that may be mis-

taken for a pedestrian or bicyclist

■

Situations in which the system may not

operate properly

●

In some situations, such as the following,

a vehicle, pedestrian or bicyclist may not

be detected by the sensors, preventing

the system from operating properly:

• When a vehicle, pedestrian or bicyclist is

approaching your vehicle

• When your vehicle or a vehicle, pedes-

trian or bicyclist is wobbling

• If a vehicle, pedestrian or bicyclist makes

an abrupt maneuver (such as sudden

swerving, acceleration or deceleration)

• When your vehicle approaches a vehicle,

pedestrian or bicyclist rapidly

• When a vehicle, pedestrian or bicyclist is

not directly in front of your vehicle

• When a vehicle, pedestrian or bicyclist is

near a wall, fence, guardrail, manhole

cover, vehicle, steel plate on the road, etc.

• When a vehicle, pedestrian or bicyclist is

under a structure

• When part of a vehicle, pedestrian or

bicyclist is hidden by an object, such as

large baggage, an umbrella, or guardrail

• When multiple vehicles, pedestrians or

bicyclists are close together

• If the sun or other light is shining directly

on a vehicle, pedestrian, bicyclist or

guardrail ahead

• When a vehicle, pedestrian or bicyclist is

a shade of white and looks extremely

bright

• When a vehicle, pedestrian or bicyclist

appears to be nearly the same color or

brightness as its surroundings

• If a vehicles, pedestrians or bicyclists 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

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Driving

• 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 vehicle, pedestrian or

bicyclist 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

• When driving in a location where there

are many objects which reflect radar,

such as a tunnel or parking garage

• 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

• If the headlights are misaligned

• When approaching a guardrail at a wide

or narrow angle

• When a vehicle approaches your vehicle

from the front left or right side while your

vehicle is entering an intersection with

poor visibility

• When a vehicle approaches your vehicle

from the rear left or right side

• When a vehicle approaches the side of

your vehicle at a shallow angle

• When driving on a road with a grade that

changes sharply (sharp incline/decline)

• Pedestrians and bicyclists which are not

illuminated by the headlights at night, in a

tunnel, etc.

• Pedestrians and bicyclists which change

speed or direction abruptly

• Pedestrians and bicyclists which suddenly

emerge from behind a vehicle or large

object

• Pedestrians and bicyclists which are

extremely close to the side of the vehicle

(outside rear view mirror, etc.)

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●

In some situations, such as the following,

the sensors may not detect the lane lines

or a safe space the vehicle can be steered

into, preventing the active steering assist

from operating properly:

• When the white (yellow) lane lines are

difficult to see, such as when they are

faint, diverging/merging, or a shadow is

cast upon them

• When the lane is more wide or narrow

than normal

• When there is a light and dark pattern on

the road surface, such as due to road

repairs

• If the system determines that a collision

can be avoided by only using the brakes

• When a pedestrian is detected near the

centerline of the vehicle

●

In some situations such as the following,

sufficient braking force or steering force

may not be obtained, preventing the sys-

tem 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 there are deep ruts in the road

• When driving on a slope

• When driving on a horizontally slanted

road

●

Some guardrails, such as the following,

may not be detected by the sensors, pre-

venting the system from operating prop-

erly:

• Guardrails which are less than approxi-

mately 1.9 ft. (60 cm) tall

• Short guardrails

• Irregularly-shaped guardrails (wire cable

guardrails, guardrails made of thin poles,

etc.)

• Guardrails which are not illuminated by

the headlights at night, in a tunnel, etc.

• Guardrails which appear to be nearly the

same color or brightness as their sur-

roundings

• Guardrails which appear to be nearly the

same shape as their surroundings (walls,

etc.)

• Guardrails which are over a metal object

(manhole cover, steel plate, etc.)

• Guardrails which are hidden behind thick

grass

• Guardrails which are extremely close to

the side of the vehicle (outside rear view

mirror, etc.)

• Curved guardrails or guardrails at the

entrance of a curve

●

In some situations such as the following,

the system may detect a pedestrian and

display a warning on the head-up display,

even though no pedestrian exists:

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

ered, such as when the road surface is

uneven or undulating (due to ruts, etc.)

• When driving on a slope

• When driving on a horizontally slanted

road

• If the driver’s posture (driver seat posi-

tion) is extreme, such as excessively

reclined

• If the head-up display position is set

extremely high

■

If VSC is disabled

●

If VSC is disabled (

P.302), 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.

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Driving

The system can detect the following:
 Vehicles
 Bicyclists
 Pedestrians

■

Pre-collision warning

When the system determines that the
possibility of a frontal collision is high, a
buzzer will sound and a warning mes-

sage will be displayed on the
multi-information display to urge the
driver to take evasive action.

■

Pre-collision brake assist

When the system determines that the
possibility of a frontal collision is high,
the system applies greater braking
force in relation to how strongly the
brake pedal is depressed.

■

Pre-collision braking

If the system determines that the possi-
bility of a frontal collision is extremely
high, the brakes are automatically
applied to help avoid the collision or
reduce the impact of the collision.

■

Pre-collision seatbacks (front pas-
senger’s seat / power rear seat [if
equipped])

If the system determines that the possi-
bility of a frontal collision is high, it may
move the seatbacks of the front pas-
senger’s seat and power rear seats to
the upright position automatically, if
reclined.

If a seat is being adjusted, it may not be
moved by the pre-collision seat function.

■

Suspension control

When the system determines that the
possibility of a frontal collision is high,

PCS (Pre-Collision System)
(vehicles with Lexus Safety
System + 2.0)

The pre-collision system uses a
radar sensor and front camera to
detect objects (

P.223) in front of

the vehicle. When the system
determines that the possibility of a
frontal collision with an object is
high, a warning operates to urge
the driver to take evasive action
and the potential brake pressure is
increased to help the driver avoid
the collision. If the system deter-
mines that the possibility of a frontal
collision with an object is extremely
high, the brakes are automatically
applied to help avoid the collision or
help reduce the impact of the colli-
sion.

The pre-collision system can be dis-
abled/enabled and the warning tim-
ing can be changed. (

P.225)

Detectable objects

System functions

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the Adaptive Variable Suspension Sys-
tem (

P.302) will control the damp-

ing force of the shock absorbers to
help maintain an appropriate vehicle
posture.

■

Steering control

When the system determines that the
possibility of a frontal collision is high
and the driver is operating the steering
wheel, the LDH system (

P.303) will

control the turning angle of the front
and rear wheels and effort necessary
to turn the steering wheel to help
enhance steering responsiveness.

WARNING

■

Limitations of the pre-collision system

●

The driver is solely responsible for safe

driving. Always drive safely, taking

care to observe your surroundings.

Do not use the pre-collision system

instead of normal braking operations

under any circumstances. This system

will not prevent collisions or lessen col-

lision damage or injury in every situa-

tion. Do not overly rely on this system.

Failure to do so may lead to an acci-

dent, resulting in death or serious

injury.

●

Although this system is designed to

help avoid a collision or help reduce

the impact of the collision, its effective-

ness may change according to various

conditions, therefore the system may

not always be able to achieve the same

level of performance.

Read the following conditions care-

fully. Do not overly rely on this system

and always drive carefully.

• Conditions under which the system

may operate even if there is no possi-

bility of a collision:

P.227

• Conditions under which the system

may not operate properly:

P.228

●

Do not attempt to test the operation of

the pre-collision system yourself.

Depending on the objects used for

testing (dummies, cardboard objects

imitating detectable objects, etc.), the

system may not operate properly, pos-

sibly leading to an accident.

■

Pre-collision braking

●

When the pre-collision braking func-

tion is operating, a large amount of

braking force will be applied.

●

If the vehicle is stopped by the opera-

tion of the pre-collision braking func-

tion, the pre-collision braking function

operation will be canceled after

approximately 2 seconds. Depress the

brake pedal as necessary.

●

The pre-collision braking function may

not operate if certain operations are

performed by the driver. If the acceler-

ator pedal is being depressed strongly

or the steering wheel is being turned,

the system may determine that the

driver is taking evasive action and pos-

sibly prevent the pre-collision braking

function from operating.

●

In some situations, while the pre-colli-

sion braking function is operating,

operation of the function may be can-

celed if the accelerator pedal is

depressed strongly or the steering

wheel is turned and the system deter-

mines that the driver is taking evasive

action.

●

If the brake pedal is being depressed,

the system may determine that the

driver is taking evasive action and pos-

sibly delay the operation timing of the

pre-collision braking function.

■

When to disable the pre-collision sys-

tem

In the following situations, disable the

system, as it may not operate properly,

possibly leading to an accident resulting

in death or serious injury:

●

When the vehicle is being towed

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■

Enabling/disabling the pre-colli-
sion system

The pre-collision system can be
enabled/disabled on

(

P.90) 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.90) 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).

WARNING

●

When your vehicle is towing another

vehicle

●

When transporting the vehicle via

truck, boat, train or similar means of

transportation

●

When the vehicle is raised on a lift with

the hybrid system on and the tires are

allowed to rotate freely

●

When inspecting the vehicle using a

drum tester such as a chassis dyna-

mometer or speedometer tester, or

when using an on vehicle wheel bal-

ancer

●

When a strong impact is applied to the

front bumper or front grille, due to an

accident or other reasons

●

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

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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

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

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)

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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 position 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.228)

The illustration shows an image of detect-

able objects.

■

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 detectable object or other

object by the roadside at the entrance of

a curve

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)

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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 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

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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.303), 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.

: 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.90) 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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4-5. Using the driving support systems

LS500h_OM_(U)_1809

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 hybrid system 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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4-5. Using the driving support systems

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Driving

■

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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4-5. Using the driving support systems

LS500h_OM_(U)_1809

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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4-5. Using the driving support systems

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Driving

WARNING

●

When the follow-up cruising display is

displayed (

P.239) 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.239) 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.239) 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.239) 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,

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.

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