Content .. 8 9 10 11 ..

LEXUS RC300, RC350 (2019 year). Instruction - part 10

155

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

Driving

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.157

• Conditions under which the system

may not operate properly:

P.159

●

Do not attempt to test the operation of

the pre-collision system yourself, as 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

●

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 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

156

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

■

Enabling/disabling the pre-colli-
sion system

The pre-collision system can be
enabled/disabled on

(

P.71) 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.71) of the

multi-information display.

The operation timing setting is retained
when the engine switch is turned off.

Far

The warning will begin to operate earlier
than with the default timing.

Middle

This is the default setting.

Near

The warning will begin to operate later
than with the default timing.

■

Operational conditions

The pre-collision system is enabled and the

WARNING

●

If the vehicle cannot be driven in a sta-

ble manner, such as when the vehicle

has been in an accident or is malfunc-

tioning

●

When the vehicle is driven in a sporty

manner or off-road

●

When the tires are not properly

inflated

●

When the tires are very worn

●

When tires of a size other than speci-

fied are installed

●

When tire chains are installed

●

When a compact spare tire or an

emergency tire puncture repair kit is

used

●

If equipment (snow plow, etc.) that may

obstruct the radar sensor or camera

sensor is temporarily installed to the

vehicle

Changing settings of the pre-col-
lision system

157

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

Driving

system determines that the possibility of a

frontal collision with a vehicle or pedestrian

is high.
Each function is operational at the following

speeds:

●

Pre-collision warning:

• Vehicle speed is between approximately

7 and 110 mph (10 and 180 km/h). (For

detecting a pedestrian, vehicle speed is

between approximately 7 and 50 mph

[10 and 80 km/h].)

• The relative speed between your vehicle

and the vehicle or pedestrian ahead is

approximately 7 mph (10 km/h) or more.

●

Pre-collision brake assist:

• Vehicle speed is between approximately

20 and 110 mph (30 and 180 km/h). (For

detecting a pedestrian, vehicle speed is

between approximately 20 and 50 mph

[30 and 80 km/h].)

• The relative speed between your vehicle

and the vehicle or pedestrian ahead is

approximately 20 mph (30 km/h) or

more.

●

Pre-collision braking:

• Vehicle speed is between approximately

7 and 110 mph (10 and 180 km/h). (For

detecting a pedestrian, vehicle speed is

between approximately 7 and 50 mph

[10 and 80 km/h].)

• The relative speed between your vehicle

and the vehicle or pedestrian ahead is

approximately 7 mph (10 km/h) or more.

The system may not operate in the following

situations:

●

If a battery terminal has been discon-

nected and reconnected and then the

vehicle has not been driven for a certain

amount of time

●

If the shift lever is in R

●

If VSC is disabled (only the pre-collision

warning function will be operational)

■

Pedestrian detection function

The pre-collision system detects pedestri-

ans based on the size, profile, and motion of

a detected object. However, a pedestrian

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.159)

■

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 vehicle or pedestrian

• When changing lanes while overtaking a

preceding vehicle

• When overtaking a preceding vehicle

that is changing lanes

• When overtaking a preceding vehicle

that is making a left/right turn

• When passing a vehicle in an oncoming

lane that is stopped to make a right/left

turn

158

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

• When driving on a road where relative

location to vehicle ahead in an adjacent

lane may change, such as on a winding

road

• When rapidly closing on a vehicle ahead

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

ered, such as when the road surface is

uneven or undulating

• When approaching objects on the road-

side, such as guardrails, utility poles,

trees, or walls

• When there is a vehicle, pedestrian, or

object by the roadside at the entrance of

a curve

• When driving on a narrow path sur-

rounded by a structure, such as in a tun-

nel or on an iron bridge

• When there is a metal object (manhole

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

sion on the road surface or roadside

• When a crossing pedestrian approaches

very close to the vehicle

• When passing through a place with a low

structure above the road (low ceiling,

traffic sign, etc.)

• When passing under an object (billboard,

etc.) at the top of an uphill road

• When rapidly closing on 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 the vehicle, such as thick

grass, tree branches, or a banner

• When the vehicle is hit by water, snow,

dust, etc. from a vehicle ahead

• When driving through steam or smoke

• When there are patterns or paint on the

159

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

Driving

road or a wall that may be mistaken for a

vehicle or pedestrian

• 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, a

vehicle may not be detected by the radar

sensor and camera sensor, preventing

the system from operating properly:

• If an oncoming vehicle is approaching

your vehicle

• If a vehicle ahead is a motorcycle or bicy-

cle

• When approaching the side or front of a

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 is carrying a load which

protrudes past its rear bumper

• If a vehicle ahead has extremely high

ground clearance

• If a vehicle ahead is irregularly shaped,

such as a tractor or side car

• If the sun or other light is shining directly

on a vehicle ahead

• If a vehicle cuts in front of your vehicle or

emerges from beside a vehicle

• If a vehicle ahead makes an abrupt

maneuver (such as sudden swerving,

acceleration or deceleration)

• When suddenly cutting behind a preced-

ing vehicle

• When a vehicle ahead is not directly in

front of your vehicle

• When driving in inclement weather such

as heavy rain, fog, snow or a sandstorm

• When the vehicle is hit by water, snow,

dust, etc. from a vehicle ahead

• When driving through steam or smoke

• When driving in a place where the sur-

rounding brightness changes suddenly,

such as at the entrance or exit of a tunnel

• When a very bright light, such as the sun

or the headlights of oncoming traffic,

shines directly into the camera sensor

• When the surrounding area is dim, such

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

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 camera

sensor

160

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

• The vehicle is wobbling.

• The vehicle is being driven at extremely

high speeds.

• When driving on a hill

• If the radar sensor or camera sensor is

misaligned

●

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

●

Some pedestrians such as the following

may not be detected by the radar sensor

and camera sensor, preventing the sys-

tem from operating properly:

• Pedestrians shorter than approximately

3.2 ft. (1 m) or taller than approximately

6.5 ft. (2 m)

• Pedestrians wearing oversized clothing

(a rain coat, long skirt, etc.), making their

silhouette obscure

• Pedestrians who are carrying large bag-

gage, holding an umbrella, etc., hiding

part of their body

• Pedestrians who are bending forward or

squatting

• Pedestrians who are pushing a stroller,

wheelchair, bicycle or other vehicle

• Groups of pedestrians which are close

together

• Pedestrians who are wearing white and

look extremely bright

• Pedestrians in the dark, such as at night

or while in a tunnel

• Pedestrians whose clothing appears to

be nearly the same color or brightness as

their surroundings

• Pedestrians near walls, fences, guardrails,

or large objects

• Pedestrians who are on a metal object

(manhole cover, steel plate, etc.) on the

road

• Pedestrians who are walking fast

• Pedestrians who are changing speed

abruptly

• Pedestrians running out from behind a

vehicle or a large object

• Pedestrians who are extremely close to

the side of the vehicle (outside rear view

mirror, etc.)

■

If the PCS warning light flashes or illumi-

nates and a warning message is dis-

played on the multi-information display

The pre-collision system may be temporar-

ily unavailable or there may be a malfunc-

tion in the system.

●

In the following situations, the warning

light will turn off, the message will disap-

pear and the system will become opera-

tional when normal operating conditions

return:

• When the radar sensor or camera sensor

or the area around either sensor is hot,

such as in the sun

• When the radar sensor or camera sensor

or the area around either sensor is cold,

such as in an extremely cold environment

• When a front sensor is dirty or covered

with snow, etc.

• When the part of the windshield in front

of the camera sensor is fogged up or cov-

ered with condensation or ice

(Defogging the windshield:

P.209)

• If the camera sensor is obstructed, such

as when the hood is open or a sticker is

attached to the windshield near the cam-

era sensor

●

If the PCS warning light continues to flash

or remains illuminated or the warning

message does not disappear even

though the vehicle has returned to nor-

mal, the system may be malfunctioning.

Have the vehicle inspected by your Lexus

dealer immediately.

■

If VSC is disabled

●

If VSC is disabled (

P.192), the pre-col-

lision brake assist and pre-collision brak-

ing functions are also disabled.

●

The PCS warning light will turn on and

“VSC Turned Off Pre-Collision Brake

System Unavailable” will be displayed on

the multi-information display.

161

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

Driving

■

Lane departure alert function

When the system determines that the
vehicle might depart from its lane, a
warning is displayed on the multi-infor-
mation display, and either the warning
buzzer sounds or the steering wheel
vibrates to alert the driver.

When the warning buzzer sounds or the
steering wheel vibrates, check the sur-
rounding road situation and carefully oper-
ate the steering wheel to move the vehicle
back to the center of the lane.

■

Steering control function

When the system determines that the
vehicle might depart from its lane, the
system provides assistance as neces-
sary by operating the steering wheel in
small amounts for a short period of
time to keep the vehicle in its lane.

If the system detects that the steering
wheel has not been operated for a fixed
amount of time or the steering wheel is not
being firmly gripped, a warning is displayed
on the multi-information display and the
function is temporarily canceled.

LDA (Lane Departure Alert
with steering control)

When driving on highways and
freeways with white (yellow) lines,
this function alerts the driver when
the vehicle might depart from its
lane and provides assistance by
operating the steering wheel to
keep the vehicle in its lane.

The LDA system recognizes visible
white (yellow) lines with the camera
sensor on the upper portion of the
front windshield.

Functions included in LDA sys-
tem

162

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

■

Vehicle sway warning function

When the vehicle is swaying or
appears as if it may depart from its lane
multiple times, the warning buzzer
sounds and a message is displayed on
the multi-information display to alert
the driver.

WARNING

■

Before using LDA system

Do not rely solely upon the LDA system.

The LDA 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.

■

To avoid operating LDA system by

mistake

When not using the LDA system, use the

LDA switch to turn the system off.

■

Situations unsuitable for LDA system

Do not use the LDA system in the follow-

ing situations.

The system may not operate properly

and lead to an accident, resulting in

death or serious injury.

●

A spare tire, tire chains, etc. are

equipped.

●

When the tires have been excessively

worn, or when the tire inflation pres-

sure is low.

●

Tires which differ by structure, manu-

facturer, brand or tread pattern are

used.

●

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 on a snow-covered

road.

●

White (yellow) lines are difficult to see

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

163

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

Driving

Press the LDA switch to turn the LDA
system on.

The LDA indicator illuminates and a mes-
sage is displayed on the multi-information
display.
Press the LDA switch again to turn the
LDA system off.
When the LDA system is turned on or off,
operation of the LDA system continues in

the same condition the next time the
engine is started.

LDA indicator

The illumination condition of the indicator
informs the driver of the system operation
status.
Illuminated in white:
LDA system is operating.
Illuminated in green:
Steering wheel assistance of the steering
control function is operating.
Flashing in orange:

WARNING

●

Asphalt repair marks, white (yellow)

line marks, etc. are present due to road

repair.

●

Vehicle is driven in a temporary lane or

restricted lane due to construction

work.

●

Vehicle is driven on a road surface

which is slippery due to rainy weather,

fallen snow, freezing, etc.

●

Vehicle is driven in traffic lanes other

than on highways and freeways.

●

Vehicle is driven in a construction

zone.

●

During emergency towing

■

Preventing LDA 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.

Turning LDA system on

Indications on multi-information
display

164

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

Lane departure alert function is operating.

Operation display of steering
wheel operation support

Indicates that steering wheel assistance of
the steering control function is operating.

Lane departure alert function dis-
play

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



Inside of displayed white lines is
white

Indicates that the system is recognizing
white (yellow) lines. When the vehicle
departs from its lane, the white line dis-
played on the side the vehicle departs from
flashes orange.



Inside of displayed white lines is
black

Indicates that the system is not able to rec-
ognize white (yellow) lines or is temporar-
ily canceled.

■

Operation conditions of each function

●

Lane departure alert function

This function operates when all of the fol-

lowing conditions are met.

• LDA is turned on.

• Vehicle speed is approximately 32 mph

(50 km/h) or more.

• System recognizes white (yellow) lines.

• Width of traffic lane is approximately 9.8

ft. (3 m) or more.

• Turn signal lever is not operated.

• Vehicle is driven on a straight road or

around a gentle curve with a radius of

more than approximately 492 ft. (150 m).

• No system malfunctions are detected.

(

P.166)

●

Steering control function

This function operates when all of the fol-

lowing conditions are met in addition to the

operation conditions for the lane depar-

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

of the

multi-information display is set to “On”.

(

P.71)

• Vehicle is not accelerated or decelerated

by a certain 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.165)

●

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.71)

• 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.166)

■

Temporary cancellation of functions

When the operation conditions are no lon-

ger met, a function may be temporarily can-

165

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

Driving

celed. However, when the operation

conditions are met again, operation of the

function is automatically restored. (

P.164)

■

Steering control function

Depending on the vehicle speed, lane

departure situation, road conditions, etc.,

the driver may not feel the function is oper-

ating or the function may not operate at all.

■

Lane departure alert function

The warning buzzer may be difficult to hear

due to external noise, audio playback, etc.

Also, it may be difficult to feel steering

wheel vibrations due to the road conditions

etc.

■

Hands off steering wheel warning

When the system determines that the driver

has removed their hands from the steering

wheel while the steering control function is

operating, a warning message urging the

driver to hold the steering wheel and the

symbol shown in the illustration are dis-

played on the multi-information display.
If the driver continues to keep their hands

off of the steering wheel, a warning mes-

sage and the symbol shown in the illustra-

tion are displayed on the multi-information

display, and the function is temporarily can-

celed. This warning also operates in the

same way when the driver continuously

operates the steering wheel only a small

amount. Always keep your hands on the

steering wheel when using this system,

regardless of warnings.

Depending on the vehicle and road condi-

tions, the warning may not operate.

■

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.

■

White (yellow) lines are only on one side

of road

The LDA system will not operate for the

side on which white (yellow) lines could not

be recognized.

■

Conditions in which functions may not

operate properly

In the following situations, the camera sen-

sor may not detect white (yellow) lines and

various functions may not operate normally.

●

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 intersec-

tion, 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 surface,

such as concrete.

●

The vehicle is driven on a surface that is

bright due to reflected light, etc.

●

The vehicle is driven in an area where the

166

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

brightness changes suddenly, such as at

the entrances and exits of tunnels, etc.

●

Light from the headlights of an oncoming

vehicle, the sun, etc. enters the camera.

●

The vehicle is driven where the road

diverges, merges, etc.

●

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 vehicle is driven around a sharp

curve.

●

The traffic lane is excessively narrow or

wide.

●

The vehicle is extremely tilted due to car-

rying 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).

●

The headlight lenses are dirty and emit a

faint amount of light at night, or the beam

axis has deviated.

●

The vehicle is struck by a crosswind.

●

The vehicle has just changed lanes or

crossed an intersection.

●

Snow tires, etc. are equipped.

■

Warning message

If the following warning message is displayed on the multi-information display and the LDA

indicator illuminates in orange, follow the appropriate troubleshooting procedure.

Warning message

Details/Actions

“Lane Departure Alert Malfunction
Visit Your Dealer”

The system may not be operating properly.
Have the vehicle inspected at your Lexus dealer.

“Front Camera Unavailable Remove
Debris On Windshield”

Dirt, rain, condensation, ice, snow, etc. are present
on the windshield in front of the camera sensor.
Turn the LDA system off, remove any dirt, rain,
condensation, ice, snow, etc. from the windshield,
and then turn the LDA system back on.

“Front Camera Unavailable”

The operation conditions of the camera sensor
(temperature, etc.) are not met.
When the operation conditions of the camera
sensor (temperature, etc.) are met, the LDA system
will become available. Turn the LDA system off, wait
for a little while, and then turn the LDA system back
on.

“Lane Departure Alert Unavailable”

The LDA system is temporarily canceled due to a
malfunction in a sensor other than the camera sen-
sor.
Turn the LDA system off and follow the appropri-
ate troubleshooting procedures for the warning
message. Afterward, drive the vehicle for a short
time, and then turn the LDA system back on.

167

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

Driving

If a different warning message is displayed, follow the instructions displayed on the screen.

■

Customization

The following settings can be changed.

For how to change settings, refer to P.339

“Lane Departure Alert Unavailable
Below Approx 32MPH”

The LDA system cannot be used as the vehicle
speed is less than approximately 32 mph (50 km/h).
Drive the vehicle at approximately 32 mph (50
km/h) or more.

“Lane Departure Alert Unavailable
at Current Speed”

The LDA system cannot be used as the vehicle
speed is too high.
Slow down.

Warning message

Details/Actions

Function

Setting details

Lane departure
alert function

Adjust alert sensitivity

Adjust alert type

Steering control
function

Turn steering wheel
assistance on and off

Vehicle sway
warning function

Turn function on and
off

Adjust alert sensitivity

168

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

Vehicle-to-vehicle distance switch
Display
Set speed
Indicators

Cruise control switch

Dynamic radar cruise con-
trol

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

Use the dynamic radar cruise con-
trol on freeways and highways.

 Vehicle-to-vehicle distance con-

trol mode (

P.170)

 Constant speed control mode

(

P.173)

System Components

A
B
C
D

WARNING

■

Before using dynamic radar cruise

control

●

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 pro-

vides driving assistance to reduce the

driver’s burden. 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.175

• Conditions under which the vehi-

cle-to-vehicle distance control mode

may not function correctly:

P.175

●

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 on this system or assum-

ing the system ensures safety while

driving can lead to an accident, result-

ing in death or serious injury.

●

Switch the dynamic radar cruise con-

trol off using the “ON/OFF” button

when not in use.

169

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

Driving

WARNING

■

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 is only

intended to help the driver in determin-

ing the following distance between the

driver’s own vehicle and a designated

vehicle traveling ahead. It is not a mecha-

nism that allows careless or inattentive

driving, and it is not a system that can

assist the driver in low-visibility condi-

tions. It is still necessary for driver to pay

close attention to the vehicle’s surround-

ings.

●

Assisting the driver to judge proper

following distance

The dynamic radar cruise control deter-

mines 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 vigilant and to deter-

mine 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 has

limited capability to prevent or avoid a

collision with a vehicle traveling ahead.

Therefore, if there is ever any danger, the

driver must take immediate and direct

control of the vehicle and act appropri-

ately in order to ensure the safety of all

involved.

■

Situations unsuitable for dynamic

radar cruise control

Do not use dynamic radar cruise control

in any of the following 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 sensor or

camera sensor

●

In traffic conditions that require fre-

quent repeated acceleration and

deceleration

●

During emergency towing

●

When an approach warning buzzer is

heard often

170

4-5. Using the driving support systems

RC350AWD_RC350_RC300AWD_RC30

0_OM_(U)_1810

This mode employs a radar sensor to detect the presence of vehicles up to approx-
imately 328 ft. (100 m) ahead, determines the current vehicle-to-vehicle following
distance, and operates to maintain a suitable following distance from the vehicle
ahead.

Note that vehicle-to-vehicle distance will close in when traveling on downhill slopes.

Example of constant speed cruising
When there are no vehicles ahead

The vehicle travels at the speed set by the driver. The desired vehicle-to-vehicle distance
can also be set by operating the vehicle-to-vehicle distance switch.

Example of deceleration cruising and follow-up cruising
When a preceding vehicle driving slower than the set speed appears

When a vehicle is detected running ahead of you, the system automatically decelerates
your vehicle. When a greater reduction in vehicle speed is necessary, the system applies
the brakes (the stop lights will come on at this time). The system will respond to changes in
the speed of the vehicle ahead in order to maintain the vehicle-to-vehicle distance set by
the driver. Approach warning warns you when the system cannot decelerate sufficiently to
prevent your vehicle from closing in on the vehicle ahead.

Example of acceleration
When there are no longer any preceding vehicles driving slower than the set
speed

The system accelerates until the set speed is reached. The system then returns to constant
speed cruising.

Driving in vehicle-to-vehicle distance control mode

Content .. 8 9 10 11 ..