Lexus RC F (2024 year). Manual in english

152

4-3. Operating the lights and wipers

ON mode, the wipers will operate once

to show that AUTO mode is activated.

●

If the temperature of the raindrop sensor

is 185°F (85°C) or higher, or -22°F

(-30°C) or lower, automatic operation

may not occur. In this case, operate the

wipers in any mode other than AUTO

mode.

■

When the windshield wipers are in tem-

porary operation (vehicles with

rain-sensing windshield wipers)

AUTO mode cannot be activated even if

is pressed.

■

If no windshield washer fluid sprays

Check that the washer nozzles are not

blocked if there is washer fluid in the wind-

shield washer fluid reservoir.

WARNING

■

Caution regarding the use of wind-

shield wipers in AUTO mode

The windshield wipers may operate

unexpectedly if the sensor is touched or

the windshield is subject to vibration in

AUTO mode. Take care that your fingers

or anything else do not become caught

in the windshield wipers.

■

Caution regarding the use of washer

fluid

When it is cold, do not use the washer

fluid until the windshield becomes warm.

The fluid may freeze on the windshield

and cause low visibility. This may lead to

an accident, resulting in death or serious

injury.

NOTICE

■

When there is no washer fluid spray

from the nozzle

Damage to the washer fluid pump may

be caused if the lever is pulled toward

you and held continually.

■

When a nozzle becomes blocked

In this case, contact your Lexus dealer.

Do not try to clear it with a pin or other

object. The nozzle will be damaged.

153

4-4. Refueling

Driving

4-4.Refueling



Close both side doors and windows,
and turn the engine switch off.



Confirm the type of fuel.

■

Fuel types



P.363

■

Fuel tank opening for unleaded gasoline

To help prevent incorrect fueling, your vehi-

cle has a fuel tank opening that only accom-

modates the special nozzle on unleaded

fuel pumps.

■

If the malfunction indicator lamp illumi-

nates

The malfunction indicator lamp may illumi-

nate erroneously if refueling is performed

repeatedly when the fuel tank is nearly full.

Opening the fuel tank cap

Perform the following steps to open
the fuel tank cap:

Before refueling the vehicle

WARNING

■

When refueling the vehicle

Observe the following precautions while

refueling the vehicle. Failure to do so may

result in death or serious injury.

●

After exiting the vehicle and before

opening the fuel door, touch an

unpainted metal surface to discharge

any static electricity. It is important to

discharge static electricity before refu-

eling because sparks resulting from

static electricity can cause fuel vapors

to ignite while refueling.

●

Always hold the grips on the fuel tank

cap and turn it slowly to remove it.

A whooshing sound may be heard

when the fuel tank cap is loosened.

Wait until the sound cannot be heard

before fully removing the cap. In hot

weather, pressurized fuel may spray

out the filler neck and cause injury.

●

Do not allow anyone that has not dis-

charged static electricity from their

body to come close to an open fuel

tank.

●

Do not inhale vaporized fuel.

Fuel contains substances that are

harmful if inhaled.

●

Do not smoke while refueling the vehi-

cle.

Doing so may cause the fuel to ignite

and cause a fire.

●

Do not return to the vehicle or touch

any person or object that is statically

charged.

This may cause static electricity to

build up, resulting in a possible ignition

hazard.

■

When refueling

Observe the following precautions to

prevent fuel overflowing from the fuel

tank:

●

Securely insert the fuel nozzle into the

fuel filler neck.

●

Stop filling the tank after the fuel noz-

zle automatically clicks off.

●

Do not top off the fuel tank.

NOTICE

■

Refueling

Do not spill fuel during refueling. Doing

so may damage the vehicle, such as

causing the emission control system to

operate abnormally or damaging fuel

system components or the vehicle’s

painted surface.

154

4-4. Refueling

With the doors unlocked, press the
center of the rear edge of the fuel
filler door.

Push until you hear a click and take your

hand away to slightly open the fuel filler

door. Then open the door fully by hand.

Turn the fuel tank cap slowly and
remove it, then put it into the holder
on the fuel filler door.

■

If the fuel filler door cannot be opened



P.346

After refueling, turn the fuel tank
cap until you hear a click. Once the

cap is released, it will turn slightly in
the opposite direction.

Close the fuel filler door, and press
the center of the rear edge of the
fuel filler door until you hear a click.

When you lock the doors, the fuel filler

door will also lock.

■

When closing the fuel filler door

Do not lock the doors before closing the

fuel filler door, as the fuel filler door cannot

be closed if the doors are locked. If the

doors are locked and the fuel filler door

cannot be closed, unlock the doors and

then close the fuel filler door.

■

Fuel filler door lock condition

The fuel filler door may not be locked even

when the vehicle’s doors are locked in the

following situations:

●

When operating the door lock button

inside the vehicle

●

When the automatic door locking system

is operated (



P.94)

Opening the fuel tank cap

Closing the fuel tank cap

156

4-5. Using the driving support systems

4-5.Using the driving support systems

■

PCS (Pre-Collision System)



P.160

■

LTA (Lane Tracing Assist)



P.170

■

AHB (Automatic High Beam)



P.143

■

RSA (Road Sign Assist)



P.179

: If equipped

■

Dynamic radar cruise control with
full-speed range



P.181

Two types of sensors, located behind
the front grille and windshield, detect
information necessary to operate the
drive assist systems.

Radar sensor
Front camera

Lexus Safety System + 2.5

The Lexus Safety System + 2.5 con-
sists of the following drive assist sys-
tems and contributes to a safe and
comfortable driving experience:

Driving assist system

WARNING

■

Lexus Safety System + 2.5

The Lexus Safety System + 2.5 is

designed to operate under the assump-

tion that the driver will drive safely, and is

designed to help reduce the impact to

the occupants and the vehicle in the case

of a collision or assist the driver in normal

driving conditions.

As there is a limit to the degree of recog-

nition accuracy and control performance

that this system can provide, do not

overly rely on this system. The driver is

always responsible for paying attention

to the vehicle’s surroundings and driving

safely.

Sensors

WARNING

■

To avoid malfunction of the radar sen-

sor

Observe the following precautions.

Otherwise, the radar sensor may not

operate properly, possibly leading to an

accident resulting in death or serious

injury.

●

Keep the radar sensor and the radar

sensor cover clean at all times.

Radar sensor
Radar sensor cover

A
B

157

4-5. Using the driving support systems

Driving

WARNING

If the front of the radar sensor or the front
or back of the radar sensor cover is dirty
or covered with water droplets, snow,
etc., clean it.

Clean the radar sensor and radar sensor
cover with a soft cloth to avoid damaging
them.

●

Do not attach accessories, stickers

(including transparent stickers) or

other items to the radar sensor, radar

sensor cover or surrounding area.

●

Do not subject the radar sensor or sur-

rounding area to a strong impact.

If the radar sensor, front grille, or front

bumper has been subjected to a

strong impact, have the vehicle

inspected by your Lexus dealer.

●

Do not disassemble the radar sensor.

●

Do not modify or paint the radar sen-

sor or radar sensor cover.

●

In the following cases, the radar sensor

must be recalibrated. Contact your

Lexus dealer for details.

• When the radar sensor or front grille

are removed and installed, or replaced

• When the front bumper is replaced

■

To avoid malfunction of the front cam-

era

Observe the following precautions.

Otherwise, the front camera may not

operate properly, possibly leading to an

accident resulting in death or serious

injury.

●

Keep the windshield clean at all times.

• If the windshield is dirty or covered

with an oily film, water droplets, snow,

etc., clear the windshield.

• If a glass coating agent is applied to the

windshield, it will still be necessary to

use the windshield wipers to remove

water droplets, etc. from the area of

the windshield in front of the front

camera.

• If the inner side of the windshield

where the front camera is installed is

dirty, contact your Lexus dealer.

●

Do not attach objects, such as stickers,

transparent stickers, etc., to the outer

side of the windshield in front of the

front camera (shaded area in the illus-

tration).

From the top of the windshield to
approximately 0.4 in. (1 cm) below
the bottom of the front camera
Approximately 7.9 in. (20 cm)
(Approximately 4.0 in. [10 cm] to the
right and left from the center of the
front camera)

●

If the part of the windshield in front of

the front camera is fogged up or cov-

ered with condensation or ice, use the

windshield defogger to remove the

fog, condensation or ice. (



P.227)

●

If water droplets cannot be properly

removed from the area of the wind-

shield in front of the front camera by

the windshield wipers, replace the

wiper insert or wiper blade.

●

Do not attach window tint to the wind-

shield.

158

4-5. Using the driving support systems

■

If a warning message is displayed on the multi-information display

A system may be temporarily unavailable or there may be a malfunction in the system.

●

In the following situations, perform the actions specified in the table. When the normal

operating conditions are detected, the message will disappear and the system will

become operational.

WARNING

●

Replace the windshield if it is damaged

or cracked.

After replacing the windshield, the

front camera must be recalibrated.

Contact your Lexus dealer for details.

●

Do not allow liquids to contact the

front camera.

●

Do not allow bright lights to shine into

the front camera.

●

Do not dirty or damage the front cam-

era.

When cleaning the inside of the wind-

shield, do not allow glass cleaner to

contact the lens of the front camera.

Also, do not touch the lens. If the lens is

dirty or damaged, contact your Lexus

dealer.

●

Do not subject the front camera to a

strong impact.

●

Do not change the installation position

or direction of the front camera or

remove it.

●

Do not disassemble the front camera.

●

Do not modify any components of the

vehicle around the front camera

(inside rear view mirror, etc.) or ceiling.

●

Do not attach any accessories to the

hood, front grille or front bumper that

may obstruct the front camera. Con-

tact your Lexus dealer for details.

●

If a surfboard or other long object is to

be mounted on the roof, make sure

that it will not obstruct the front cam-

era.

●

Do not modify the headlights or other

lights.

159

4-5. Using the driving support systems

Driving

If the message does not disappear, contact your Lexus dealer.

●

In the following situations, if the situation has changed (or the vehicle has been driven for

some time) and the normal operating conditions are detected, the message will disappear

and the system will become operational.

If the message does not disappear, contact your Lexus dealer.

• When the temperature around the radar sensor is outside of the operational range, such

as when the vehicle is in the sun or in an extremely cold environment

• When the front camera cannot detect objects in front of the vehicle, such as when driving

in the dark, snow, or fog, or when bright lights are shining into the front camera

• Depending on the conditions in the vicinity of the vehicle, the radar may judge the sur-

rounding environment can not be properly recognized. In that case, “Pre-Collision Sys-

tem Unavailable See Owner’s Manual” is displayed.

Situation

Actions

When the area around a camera is covered
with dirt, moisture (fogged up, covered with
condensation, ice, etc.), or other foreign
matter

Using the wiper and A/C function, remove
the dirt and other attached matter.
(



P.227).

When the temperature around the front
camera is outside of the operational range,
such as when the vehicle is in the sun or in an
extremely cold environment

If the front camera is hot, such as after the
vehicle had been parked in the sun, use the
air conditioning system to decrease the tem-
perature around the front camera.
If a sunshade was used when the vehicle
was parked, depending on its type, the sun-
light reflected from the surface of the sun-
shade may cause the temperature of the
front camera to become excessively high.

If the front camera is cold, such after the
vehicle is parked in an extremely cold envi-
ronment, use the air conditioning system to
increase the temperature around the front
camera.

The area in front of the front camera is
obstructed, such as when the hood is open
or a sticker is attached to the part of the
windshield in front of the front camera.

Close the hood, remove the sticker, etc. to
clear the obstruction.

When “Pre-Collision System Radar In Self
Calibration Unavailable See Owner’s Man-
ual” is displayed.

Check whether there is attached materials
on the radar sensor and radar sensor cover,
and if there is, remove it.

160

4-5. Using the driving support systems

The system can detect the following
(The detectable objects differs
depending on the function.):



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.

■

Emergency steering assist

If the system determines that the possi-
bility of a frontal collision is high and
that there is sufficient space for the
vehicle to be steered into within its
lane, and the driver has begun evasive
maneuver or steering, emergency
steering assist will assist the steering
movements to help enhance the vehi-
cle stability and for lane departure pre-
vention. During operation, the
indicator will illuminate in green.

PCS (Pre-Collision System)

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



P.160) 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.163)

Detectable objects

System functions

161

4-5. Using the driving support systems

Driving

■

Intersection right/left turn assis-
tance

If the system determines that there is a
high possibility of a collision in the fol-
lowing situations, it will assist with
Pre-collision warning and, if necessary
Pre-collision braking.
Depending on the configuration of the
intersection, it may not be possible to
support.



When you turn right/left at an inter-
section and cross the path of an
oncoming vehicle



When you turn right/left, pedestrian
is detected in the forward direction
and estimated to enter your vehi-
cle’s path (bicyclists are not
detected.)

■

Suspension control

When the system determines that the
possibility of a frontal collision is high,
the Adaptive Variable Suspension Sys-
tem (



P.211) will control the damping

force of the shock absorbers to help
maintain an appropriate vehicle pos-
ture.

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.166

162

4-5. Using the driving support systems

WARNING

• Conditions under which the system

may not operate properly:



P.168

●

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.

■

Emergency steering assist

●

As emergency steering assist opera-

tion will be canceled when the system

determines that lane departure pre-

vention function has been completed.

●

Emergency steering assist may not

operate or may be cancel in the follow-

ing cases as the system may determine

the driver is taking actions.

• If the accelerator pedal is being

depressed strongly, the steering wheel

is being operated sharply, the brake

pedal is being depressed or the turn

signal lever is being operated. In this

case, the system may determine that

the driver is taking evasive action and

the emergency steering assist may not

operate.

• In some situations, while the emer-

gency steering assist is operating,

operation of the function may be can-

celed if the accelerator pedal is

depressed strongly, the steering wheel

is operated sharply or the brake pedal

is being depressed and the system

determines that the driver is taking

evasive action.

• When the emergency steering assist is

operating, if the steering wheel is held

firmly or is operated in the opposite

direction to that which the system is

generating torque, the function may be

canceled.

■

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

●

When your vehicle is towing another

vehicle

●

When transporting the vehicle via

truck, boat, train or similar means of

transportation

163

4-5. Using the driving support systems

Driving

■

Enabling/disabling the pre-colli-
sion system

The pre-collision system can be
enabled/disabled on

(



P.75) of

the multi-information display.

The system is automatically enabled each
time the engine switch is turned to IGNI-
TION 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.75) of the

multi-information display.

The warning timing setting is retained
when the engine 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).

If the pre-collision warning timing is
changed, emergency steering assist
timing will also be changed accord-
ingly.
If late is selected, emergency steering
assist would not operate in case of an
emergency.

WARNING

●

When the vehicle is raised on a lift with

the engine running 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

164

4-5. Using the driving support systems

Early

Middle

This is the default setting.

Late

■

Operational conditions for each pre-collision function

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

collision with a detected object is high.
The system may not operate in the following situations:
• If a 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
The operation speeds and operation cancellation for each function is listed below.

●

Pre-collision warning

While the pre-collision warning function is operating, if the steering wheel is operated heav-

ily or suddenly, the pre-collision warning may be cancelled.

●

Pre-collision brake assist

Detectable objects

Vehicle speed

Relative speed between your

vehicle and object

Preceding and stopped vehi-

cles

Approx. 7 to 110 mph (10 to

180 km/h)

Approx. 7 to 110 mph (10 to

180 km/h)

Oncoming vehicles

Approx. 7 to 110 mph (10 to

180 km/h)

Approx. 13 to 110 mph (20 to

180 km/h)

Bicyclists and pedestrians

Approx. 7 to 50 mph (10 to

80 km/h)

Approx. 7 to 50 mph (10 to

80 km/h)

165

4-5. Using the driving support systems

Driving

●

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.

●

Emergency steering assist

When the turn signal lights are flashing, emergency steering assist will not operate in case of

an emergency.
When VSC OFF indicator is illuminated, emergency steering assist will not operate.

If any of the following occur while the emergency steering assist function is operating, it will

be canceled:
• The accelerator pedal is depressed strongly.
• The steering wheel is turned sharply or abruptly.
• The brake pedal is depressed.

●

Intersection right/left turn assistance (pre-collision warning)

When the turn signal lights are not flashing, support for turning left or right at an intersection

which targets oncoming vehicles does not work.

Detectable objects

Vehicle speed

Relative speed between your

vehicle and object

Preceding and stopped vehi-

cles

Approx. 20 to 110 mph (30

to 180 km/h)

Approx. 20 to 110 mph (30

to 180 km/h)

Bicyclists and pedestrians

Approx. 20 to 50 mph (30

to 80 km/h)

Approx. 20 to 50 mph (30

to 80 km/h)

Detectable objects

Vehicle speed

Relative speed between your

vehicle and object

Preceding and stopped vehi-

cles

Approx. 7 to 110 mph (10 to

180 km/h)

Approx. 7 to 110 mph (10 to

180 km/h)

Oncoming vehicles

Approx. 7 to 110 mph (10 to

180 km/h)

Approx. 13 to 110 mph (20 to

180 km/h)

Bicyclists and pedestrians

Approx. 7 to 50 mph (10 to

80 km/h)

Approx. 7 to 50 mph (10 to

80 km/h)

Detectable objects

Vehicle speed

Relative speed between your

vehicle and object

Preceding and stopped vehi-

cles, bicyclists and pedestri-

ans

Approx. 25 to 50 mph (40

to 80 km/h)

Approx. 25 to 50 mph (40

to 80 km/h)

166

4-5. Using the driving support systems

●

Intersection right/left turn assistance (pre-collision braking)

When the turn signal lights are not flashing, support for turning left or right at an intersection

which targets oncoming vehicles does not work.

■

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.168)

The illustration shows an image of detect-

able objects.

■

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

Detectable objects

Vehicle speed

Oncoming vehicle

speed

Relative speed

between your vehi-

cle and object

Oncoming vehicles

Approx. 7 to 15 mph

(10 to 25 km/h)

Approx. 20 to 35

mph (30 to 55 km/h)

Approx. 25 to 50

mph (40 to 80

km/h)

Pedestrians

Approx. 7 to 15 mph

(10 to 25 km/h)

Approx. 7 to 15 mph

(10 to 25 km/h)

Detectable objects

Vehicle speed

Oncoming vehicle

speed

Relative speed

between your vehi-

cle and object

Oncoming vehicles

Approx. 10 to 15 mph

(15 to 25 km/h)

Approx. 20 to 28

mph (30 to 45 km/h)

Approx. 28 to 43

mph (45 to 70 km/h)

Pedestrians

Approx. 7 to 15 mph

(10 to 25 km/h)

Approx. 7 to 15 mph

(10 to 25 km/h)

167

4-5. Using the driving support systems

Driving

• 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,

radar equipped vehicles, etc., or other

location where strong radio waves or

electrical noise may be present

• When there are many things which can

reflect the radio waves of the radar in the

vicinity (tunnels, truss bridges, gravel

roads, snow covered road that have

tracks, etc.)

• While making a right/left turn, when an

oncoming vehicle or a crossing pedes-

trian has already exited the path of your

vehicle

• While making a right/left turn, closely in

front of an oncoming vehicle or a cross-

ing pedestrian.

• While making a right/left turn, when an

oncoming vehicle or a crossing pedes-

trian stops before entering the path of

your vehicle

• While making a right/left turn, when an

oncoming vehicle turns right/left in front

of your vehicle

168

4-5. Using the driving support systems

• While steering into the direction of

oncoming traffic

■

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 there are many things which can

reflect the radio waves of the radar in the

vicinity (tunnels, truss bridges, gravel

roads, snow covered road that have

tracks, etc.)

• When there is an effect on the radio

waves to the radar that is installed on

another vehicle

• 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

169

4-5. Using the driving support systems

Driving

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

• 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

• When driving in a traffic lane separated

by more than one lane where oncoming

vehicles are driving while making a

right/left turn

• When largely out of place with the oppo-

site facing targeted oncoming vehicle

during a right/left turn

• While making a right/left turn, when a

pedestrian approaches from behind or

side of your vehicle

●

In addition to the above, in some situa-

tions, such as the following, the emer-

gency steering assist may not operate.

• 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 wider or narrower than

normal

• When there is a light and dark pattern on

the road surface, such as due to road

repairs

• When the target is too close

• When there is insufficient safe or unob-

structed space for the vehicle to be

steered into

• If oncoming vehicle is present

• If VSC function is operating

●

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

170

4-5. Using the driving support systems

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

• When the road surface has deep wheel

tracks

• When driving on a hill road

• When driving on a road that has inclines

to the left or right

■

If VSC is disabled

●

If VSC is disabled (



P.212), emergency

steering assist is disabled.

●

The PCS warning light will turn on.

LTA (Lane Tracing Assist)

While driving on a road with clear
white (yellow) lane lines, the LTA
system warns the driver if the vehi-
cle may deviate from the current
lane or course

, and also can

slightly operate the steering wheel
to help avoid deviation from the
lane or course

. Also, while the

dynamic radar cruise control with
full-speed range (



P.181) is oper-

ating, this system will operate the
steering wheel to maintain the vehi-
cle’s lane position.

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

171

4-5. Using the driving support systems

Driving

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.

■

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.

●

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.175) 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.175) and the preceding

vehicle is swaying. (Your vehicle may

sway accordingly and depart from the

lane.)

172

4-5. Using the driving support systems

WARNING

●

When the follow-up cruising display is

displayed (



P.175) 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.175) 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,

reflective poles, etc.).

●

Vehicle is driven where the road

diverges, merges, etc.

●

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.

173

4-5. Using the driving support systems

Driving

■

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.

: 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

WARNING

●

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.

Functions included in LTA system

175

4-5. Using the driving support systems

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.

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.
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).

Turning LTA system on

Indications on multi-information
display

176

4-5. Using the driving support systems

Lane departure alert function dis-
play

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



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.



Inside of displayed 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.

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 is not being driven around a

sharp curve.

• No system malfunctions are detected.

(



P.178)

: 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.

• 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-

177

4-5. Using the driving support systems

Driving

ating.

• TRAC or VSC is not turned off.

●

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.75)

• 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.178)

●

Lane centering function

This function operates when all of the fol-

lowing conditions are met.

• LTA is turned on.
• Setting for “Lane Center” in

of the

multi-information display are set to “On”.

(



P.75)

• 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.178)

• 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.177)

• 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.176)

●

If the operation conditions (



P.176) 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 vibrating

the steering wheel instead of sounding

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.

●

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

178

4-5. Using the driving support systems

keep your hands on the steering wheel

when using this system, regardless of warn-

ings.

●

When the system determines the driver is

not holding the steering wheel while the

lane centering function 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.

●

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.374)

179

4-5. Using the driving support systems

Driving

: If equipped

The RSA system recognizes specific
road signs using the front camera
and/or navigation system (when speed
limit information is available) to provide
information to the driver via the display.

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

When the front camera recognizes a

sign and/or information of a sign is
available from the navigation system,
the sign will be displayed on the
multi-information display.



When the driving support system
information is selected, a maximum
of 3 signs can be displayed.
(



P.75)



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



P.75)

• 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.

RSA (Road Sign Assist)

Summary of function

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

180

4-5. Using the driving support systems

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.

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.

Supported types of road signs

Speed limit

Do Not Enter

Stop

Yield

Notification function

181

4-5. Using the driving support systems

Driving

●

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.

●

Side road speed signs may be detected

and displayed (if positioned in sight of the

front camera) while the vehicle is travel-

ing on the main road.

●

Roundabout exit road speed signs may

be detected and displayed (if positioned

in sight of the front camera) while travel-

ing on a roundabout.

●

The front of the vehicle is raised or low-

ered due to the carried load.

●

The surrounding brightness is not suffi-

cient or changes suddenly.

●

When a sign intended for trucks, etc. is

recognized.

●

The navigation system map data is out-

dated.

●

The navigation system is not operating.

●

The speed information displayed on the

meter and on the navigation system may

be different due to the navigation system

using map data.

■

Speed limit sign display

If the engine switch was last turned off while

a speed limit sign was displayed on the

multi-information display, the same sign dis-

plays again when the engine switch is

turned to IGNITION ON mode.

■

If “RSA Malfunction Visit Your Dealer”

is shown

The system may be malfunctioning. Have

the vehicle inspected by your Lexus dealer.

■

Customization

Some functions can be customized. (Cus-

tomizable features:



P.374)

Vehicle-to-vehicle distance switch
Multi-information display
Set speed
Indicators

Dynamic radar cruise con-
trol with full-speed range

In vehicle-to-vehicle distance con-
trol mode, the vehicle automati-
cally accelerates, decelerates and
stops to match the speed changes
of the preceding vehicle even if the
accelerator pedal is not depressed.
In constant speed control mode,
the vehicle runs at a fixed speed.

Use the dynamic radar cruise con-
trol with full-speed range on free-
ways and highways.



Vehicle-to-vehicle distance con-
trol mode (



P.183)



Constant speed control mode
(



P.188)

System Components

A
B
C
D

182

4-5. Using the driving support systems

Cruise control switch

WARNING

■

Before using dynamic radar cruise

control with full-speed range

●

Driving safely is the sole responsibility

of the driver. Do not rely solely on the

system, and drive safely by always pay-

ing careful attention to your surround-

ings.

●

The dynamic radar cruise control with

full-speed range provides driving

assistance to reduce the driver’s bur-

den. However, there are limitations to

the assistance provided.

Read the following conditions care-

fully. Do not overly rely on this system

and always drive carefully.

• When the sensor may not be correctly

detecting the vehicle ahead:



P.190

• Conditions under which the vehi-

cle-to-vehicle distance control mode

may not function correctly:



P.191

●

Set the speed appropriately depend-

ing on the speed limit, traffic flow, road

conditions, weather conditions, etc.

The driver is responsible for checking

the set speed.

●

Even when the system is functioning

normally, the condition of the preced-

ing vehicle as detected by the system

may differ from the condition

observed by the driver. Therefore, the

driver must always remain alert, assess

the danger of each situation and drive

safely. Relying solely on this system or

assuming the system ensures safety

while driving can lead to an accident,

resulting in death or serious injury.

●

Switch the dynamic radar cruise con-

trol with full-speed range setting to off,

using the “ON/OFF” button when not

in use.

■

Cautions regarding the driving assist

systems

Observe the following precautions, as

there are limitations to the assistance

provided by the system.

Failure to do so may cause an accident

resulting in death or serious injury.

●

Assisting the driver to measure follow-

ing distance

The dynamic radar cruise control with

full-speed range is only intended to help

the driver in determining the following

distance between the driver’s own vehi-

cle and a designated vehicle traveling

ahead. It is not a mechanism that allows

careless or inattentive driving, and it is

not a system that can assist the driver in

low-visibility conditions. It is still neces-

sary for driver to pay close attention to

the vehicle’s surroundings.

●

Assisting the driver to judge proper

following distance

The dynamic radar cruise control with

full-speed range determines whether the

following distance between the driver’s

own vehicle and a designated vehicle

traveling ahead is within a set range. It is

not capable of making any other type of

judgement. Therefore, it is absolutely

necessary for the driver to remain vigi-

lant and to determine whether or not

there is a possibility of danger in any

given situation.

●

Assisting the driver to operate the

vehicle

The dynamic radar cruise control with

full-speed range does not include func-

tions which will prevent or avoid colli-

sions with vehicles ahead of your vehicle.

Therefore, if there is ever any possibility

of danger, the driver must take immedi-

ate and direct control of the vehicle and

act appropriately in order to ensure the

safety of all involved.

183

4-5. Using the driving support systems

Driving

This mode employs a radar to detect the presence of vehicles up to approximately

WARNING

■

Situations unsuitable for dynamic

radar cruise control with full-speed

range

Do not use dynamic radar cruise control

with full-speed range in any of the follow-

ing situations.

Doing so may result in inappropriate

speed control and could cause an acci-

dent resulting in death or serious injury.

●

Roads where there are pedestrians,

cyclists, etc.

●

In heavy traffic

●

On roads with sharp bends

●

On winding roads

●

On slippery roads, such as those cov-

ered with rain, ice or snow

●

On steep downhills, or where there

are sudden changes between sharp up

and down gradients

Vehicle speed may exceed the set

speed when driving down a steep hill.

●

At entrances to freeways and highways

●

When weather conditions are bad

enough that they may prevent the sen-

sors from detecting correctly (fog,

snow, sandstorm, heavy rain, etc.)

●

When there is rain, snow, etc. on the

front surface of the radar or front cam-

era

●

In traffic conditions that require fre-

quent repeated acceleration and

deceleration

●

During emergency towing

●

When an approach warning buzzer is

heard often

Driving in vehicle-to-vehicle distance control mode

Lexus RC F (2024 year). Manual in english - page 5