Lexus RC300 (2023 year). Manual in english

182

4-5. Using the driving support systems

●

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.363)

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.184)



Constant speed control mode
(



P.189)

System Components

A
B
C
D

183

4-5. Using the driving support systems

Driving

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.191

• Conditions under which the vehi-

cle-to-vehicle distance control mode

may not function correctly:



P.192

●

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.

184

4-5. Using the driving support systems

This mode employs a radar sensor to detect the presence of vehicles up to approx-

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

185

4-5. Using the driving support systems

Driving

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. The desired vehicle-to-vehicle distance can also be set by operating the
vehicle-to-vehicle distance switch.

When driving on downhill slopes, the vehicle-to-vehicle distance may become shorter.

Example of constant speed cruising
When there are no vehicles ahead

The vehicle travels at the speed set by the driver.

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.
When the vehicle ahead of you stops, your vehicle will also stop (vehicle is stopped by sys-
tem control). After the vehicle ahead starts off, pushing the cruise control lever up or
depressing the accelerator pedal (start-off operation) will resume follow-up cruising. If the
start-off operation is not performed, system control continues to keep your vehicle
stopped.
When the turn signal lever is operated and your vehicle moves to an overtaking lane while
driving at 50 mph (80 km/h) or more, the vehicle will accelerate to help to overtake a
passing vehicle.
The system’s identification of what is an overtaking lane may be determined solely based on
the location of the steering wheel in the vehicle (left side driver position versus right side
driver position.) If the vehicle is driven to a region where the overtaking lane is on a different
side from where the vehicle is normally driven, the vehicle may accelerate when the turn

186

4-5. Using the driving support systems

signal lever is operated in the opposite direction to the overtaking lane (e.g., if the driver
normally operates the vehicle in a region where the overtaking lane is to the right but then
drives to a region where the overtaking lane is to the left, the vehicle may accelerate when
the right turn signal is activated).

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.

Press the “ON/OFF” button to acti-
vate the cruise control.

Dynamic radar cruise control indicator will

come on and a message will be displayed

on the multi-information display.
Press the button again to deactivate the

cruise control.
If the “ON/OFF” button is pressed and

held for 1.5 seconds or more, the system

turns on in constant speed control mode.

(



P.189)

Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (at or above
approximately 20 mph [30 km/h])
and push the lever down to set the
speed.

Cruise control “SET” indicator will come

on.

The vehicle speed at the moment the lever

is released becomes the set speed.



Adjusting the set speed by the lever

To change the set speed, operate the
lever until the desired set speed is dis-
played.

Increases the speed (Except when
the vehicle has been stopped by
system control in vehicle-to-vehi-
cle distance control mode)

Setting the vehicle speed (vehi-
cle-to-vehicle distance control
mode)

Adjusting the set speed

187

4-5. Using the driving support systems

Driving

Decreases the speed

Fine adjustment: Momentarily move
the lever in the desired direction.
Large adjustment: Hold the lever up or
down to change the speed, and release
when the desired speed is reached.
In the vehicle-to-vehicle distance con-
trol mode, the set speed will be
increased or decreased as follows:



For the U.S. mainland and Hawaii

Fine adjustment: By 1 mph (1.6 km/h)

or 1

km/h (0.6 mph)

each time the lever is

operated
Large adjustment: Increases or decreases
in 1 mph (1.6 km/h)

or 1 km/h (0.6 mph)

increments for as long as the lever is held



For Canada, Guam and Puerto Rico

Fine adjustment: By 1 mph (1.6 km/h)

or 1

km/h (0.6 mph)

each time the lever is

operated
Large adjustment: Increases or decreases
in 5 mph (8 km/h)

or 5 km/h (3.1 mph)

increments for as long as the lever is held

In the constant speed control mode
(



P.189), the set speed will be

increased or decreased as follows:

Fine adjustment: By 1 mph (1.6 km/h)

or 1

km/h (0.6 mph)

each time the lever is

operated
Large adjustment: The speed will continue
to change while the lever is held.

: When the set speed is shown in “MPH”

: When the set speed is shown in “km/h”



Increasing the set speed by the
accelerator pedal

Accelerate with accelerator pedal
operation to the desired vehicle
speed

Push the lever down

Pressing the switch changes the vehi-
cle-to-vehicle distance as follows:

Long

Medium

Short

If a vehicle is running ahead of you, the pre-
ceding vehicle mark

will also be dis-

played.

Select a distance from the table below.
Note that the distances shown corre-
spond to a vehicle speed of 50 mph
(80 km/h). Vehicle-to-vehicle distance
increases/decreases in accordance
with vehicle speed. When the vehicle is
stopped by system control, the vehicle
stops at a certain vehicle-to-vehicle
distance depending on the situation.

Changing the vehicle-to-vehicle
distance (vehicle-to-vehicle dis-
tance control mode)

Vehicle-to-vehicle distance set-
tings (vehicle-to-vehicle dis-
tance control mode)

188

4-5. Using the driving support systems

After the vehicle ahead of you starts
off, push the lever up.
Your vehicle will also resume follow-up
cruising if the accelerator pedal is
depressed after the vehicle ahead of
you starts off.

Pulling the lever toward you can-
cels the speed control.

The speed control is also canceled when
the brake pedal is depressed. (When the
vehicle has been stopped by system con-
trol, depressing the brake pedal does not
cancel the setting.)

Pushing the lever up resumes the
cruise control and returns vehicle
speed to the set speed.

When your vehicle is too close to a
vehicle ahead, and sufficient automatic
deceleration via the cruise control is
not possible, the display will flash and
the buzzer will sound to alert the driver.
An example of this would be if another
driver cuts in front of you while you are
following a vehicle. Depress the brake
pedal to ensure an appropriate vehi-
cle-to-vehicle distance.

Distance

options

Vehicle-to-vehicle dis-

tance

Long

Approximately 160 ft. (50
m)

Medium

Approximately 130 ft. (40
m)

Short

Approximately 100 ft. (30
m)

Resuming follow-up cruising
when the vehicle has been
stopped by system control (vehi-
cle-to-vehicle distance control
mode)

Canceling and resuming the
speed control

Approach warning (vehi-
cle-to-vehicle distance control
mode)

189

4-5. Using the driving support systems

Driving

■

Warnings may not occur when

In the following instances, warnings
may not occur even when the vehi-
cle-to-vehicle distance is small.



When the speed of the preceding
vehicle matches or exceeds your
vehicle speed



When the preceding vehicle is trav-
eling at an extremely slow speed



Immediately after the cruise control
speed was set



When depressing the accelerator
pedal

While driving in vehicle-to-vehicle dis-
tance control mode, this function will
reduce the vehicle speed, if it is deter-
mined to be necessary.

■

Function operation

When the steering wheel begins to be
turned, the vehicle speed will begin
being reduced. When the steering
wheel is returned to the center posi-
tion, the vehicle speed reduction will
end.
Depending on the situation, the vehicle
speed will then return to the vehi-

cle-to-vehicle distance control mode
set speed.
In situations where vehicle-to-vehicle
distance control needs to operate,
such as when a preceding vehicle cuts
in front of your vehicle, the curve speed
reduction function will be canceled.

■

Operation display

Displayed when the vehicle speed is
being reduced.

When the vehicle speed reduction ends,
the display will disappear.

■

Changing the settings of the curve
speed reduction function

The curve speed reduction function
can be enabled/disabled and the vehi-
cle speed reduction strength can be
adjusted on

of the multi-informa-

tion display.

The setting will change each time the “OK”
meter control switch is pressed.

When constant speed control mode is
selected, your vehicle will maintain a
set speed without controlling the vehi-
cle-to-vehicle distance. Select this
mode only when vehicle-to-vehicle dis-

Curve speed reduction function

Selecting constant speed con-
trol mode

190

4-5. Using the driving support systems

tance control mode does not function
correctly due to a dirty radar, etc.

With the cruise control off, press
and hold the “ON/OFF” button for
1.5 seconds or more.

Immediately after the “ON/OFF” button is

pressed, the dynamic radar cruise control

indicator will come on. Afterwards, it

switches to the cruise control indicator.
Switching to constant speed control mode

is only possible when operating the lever

with the cruise control off.

Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (at or above
approximately 20 mph [30 km/h])
and push the lever down to set the
speed.

Cruise control “SET” indicator will come

on.
The vehicle speed at the moment the lever

is released becomes the set speed.
Adjusting the speed setting:



P.186

Canceling and resuming the speed setting:



P.188

■

Dynamic radar cruise control with

full-speed range can be set when

●

The shift lever is in D.

●

The desired set speed can be set when

the vehicle speed is approximately 20

mph (30 km/h) or more.

(However, when the vehicle speed is set

while driving at below approximately 20

mph [30 km/h], the set speed will be set

to approximately 20 mph [30 km/h].)

■

Accelerating after setting the vehicle

speed

The vehicle can accelerate by operating the

accelerator pedal. After accelerating, the

set speed resumes. However, during vehi-

cle-to-vehicle distance control mode, the

vehicle speed may decrease below the set

speed in order to maintain the distance to

the preceding vehicle.

■

When the vehicle stops while follow-up

cruising

●

Pushing the lever up while the vehicle

ahead stops will resume follow-up cruis-

ing if the vehicle ahead starts off within

approximately 3 seconds after the lever

is pushed up.

●

If the vehicle ahead starts off within 3 sec-

onds after your vehicle stops, follow-up

cruising will be resumed.

■

Automatic cancelation of vehi-

cle-to-vehicle distance control mode

Vehicle-to-vehicle distance control mode is

automatically canceled in the following situ-

ations.

●

VSC is activated.

●

TRAC is activated for a period of time.

191

4-5. Using the driving support systems

Driving

●

When the VSC or TRAC system is

turned off.

●

The sensor cannot detect correctly

because it is covered in some way.

●

When the brake control or output restric-

tion control of a driving support system

operates. (For example: Pre-Collision

System, Drive-Start Control)

●

The parking brake is operated.

●

The vehicle is stopped by system control

on a steep incline.

●

The following are detected when the

vehicle has been stopped by system con-

trol:

• The driver is not wearing a seat belt.

• The driver’s door is opened.

• The vehicle has been stopped for about 3

minutes.

If vehicle-to-vehicle distance control mode

is automatically canceled for any reasons

other than the above, there may be a mal-

function in the system. Contact your Lexus

dealer.

■

Automatic cancelation of constant

speed control mode

Constant speed control mode is automati-

cally canceled in the following situations:

●

Actual vehicle speed is more than

approximately 10 mph (16 km/h) below

the set vehicle speed.

●

Actual vehicle speed falls below approxi-

mately 20 mph (30 km/h).

●

VSC is activated.

●

TRAC is activated for a period of time.

●

When the VSC or TRAC system is

turned off.

●

When the brake control or output restric-

tion control of a driving support system

operates. (For example: Pre-Collision

System, Drive-Start Control)

●

The parking brake is operated.

If constant speed control mode is automati-

cally canceled for any reasons other than

the above, there may be a malfunction in the

system. Contact your Lexus dealer.

■

Situations in which the curve speed

reduction function may not operate

In situations such as the following, the curve

speed reduction function may not operate:

●

When the vehicle is being driven around

a gentle curve

●

When the accelerator pedal is being

depressed

●

When the vehicle is being driven around

an extremely short curve

■

Brake operation

A brake operation sound may be heard and

the brake pedal response may change, but

these are not malfunctions.

■

Warning messages and buzzers for

dynamic radar cruise control with

full-speed range

Warning messages and buzzers are used to

indicate a system malfunction or to inform

the driver of the need for caution while driv-

ing. If a warning message is shown on the

multi-information display, read the message

and follow the instructions. (



P.159, 313)

■

When the sensor may not be correctly

detecting the vehicle ahead

In the case of the following and depending

on the conditions, operate the brake pedal

when deceleration of the system is insuffi-

cient or operate the accelerator pedal

when acceleration is required.

As the sensor may not be able to correctly

detect these types of vehicles, the approach

warning (



P.188) may not be activated.

●

Vehicles that cut in suddenly

●

Vehicles traveling at low speeds

●

Vehicles that are not moving in the same

lane

●

Vehicles with small rear ends (trailers

with no load on board, etc.)

192

4-5. Using the driving support systems

●

Motorcycles traveling in the same lane

●

When water or snow thrown up by the

surrounding vehicles hinders the detect-

ing of the sensor

●

When your vehicle is pointing upwards

(caused by a heavy load in the luggage

compartment, etc.)

●

Preceding vehicle has an extremely high

ground clearance

■

Conditions under which the vehi-

cle-to-vehicle distance control mode

may not function correctly

In the case of the following conditions,

operate the brake pedal (or accelerator

pedal, depending on the situation) as nec-

essary.

As the sensor may not be able to correctly

detect vehicles ahead, the system may not

operate properly.

●

When the road curves or when the lanes

are narrow

●

When steering wheel operation or your

position in the lane is unstable

●

When the vehicle ahead of you deceler-

ates suddenly

●

When driving on a road surrounded by a

structure, such as in a tunnel or on a

bridge

●

While the vehicle speed is decreasing to

the set speed after the vehicle acceler-

ates by depressing the accelerator pedal

■

Situations in which the curve speed

reduction function may not operate

properly

In situations such as the following, the curve

speed reduction function may not operate

properly:

●

When the vehicle is being driven around

a curve on an incline/decline

●

When the course of the vehicle differs

from the shape of the curve

●

When the vehicle speed is excessively

high when entering a curve

●

When the steering wheel is suddenly

operated

193

4-5. Using the driving support systems

Driving

: If equipped

Front corner sensors
Front center sensors
Rear corner sensors
Rear center sensors

Turns the intuitive parking assist on/off

When on, the indicator light comes on to
inform the driver that the system is opera-
tional.

When the sensors detect an obstacle, a
graphic is shown on the multi-informa-
tion display and Center Display
depending on the position and dis-
tance to the obstacle.

■

Multi-information display

Front corner sensor detection
Front center sensor detection
Rear corner sensor detection
Rear center sensor detection

■

Center Display

A graphic is shown when the Lexus
parking assist monitor is displayed
(insert display).

Intuitive parking assist

The distance from your vehicle to
nearby obstacles when parallel
parking or maneuvering into a
garage is measured by the sensors
and communicated via the
multi-information display, Center
Display and a buzzer. Always check
the surrounding area when using
this system.

Types of sensors

Intuitive parking assist switch

A
B
C
D

Display

A
B
C
D

194

4-5. Using the driving support systems

A simplified image is displayed on the
Center Display when an object is
detected.

WARNING

■

When using the intuitive parking

assist

Observe the following precautions.

Failing to do so may result in the vehicle

being unable to be driven safely and pos-

sibly cause an accident.

●

Do not use the sensor at speeds in

excess of 6 mph (10 km/h).

●

The sensors’ detection areas and reac-

tion times are limited. When moving

forward or reversing, check the areas

surrounding the vehicle (especially the

sides of the vehicle) for safety, and

drive slowly, using the brake to control

the vehicle’s speed.

●

Do not install accessories within the

sensors’ detection areas.

●

The area directly under the bumpers is

not detected.

Thin posts or objects lower than a sen-

sor may not be detected when

approached, even if they have been

detected once.

■

When to disable the function

In the following situations, disable the

function as it may operate even though

there is no possibility of a collision.

●

The vehicle is equipped with a fender

pole, wireless antenna or fog lights.

●

The front or rear bumper or a sensor

receives a strong impact.

●

A non-genuine Lexus suspension

(lowered suspension, etc.) is installed.

●

Towing eyelets are installed.

●

A backlit license plate is installed.

■

When using intuitive parking assist

In the following situations, the system

may not function correctly due to a sen-

sor malfunction, etc. Have the vehicle

checked by your Lexus dealer.

●

The intuitive parking assist operation

display flashes or shows continuously,

and a buzzer sounds when no objects

are detected.

●

If the area around a sensor collides

with something, or is subjected to

strong impact.

●

If the bumper or grille collides with

something.

●

If the display flashes or is displayed

continuously and a buzzer does not

sound, except when the mute function

has been turned on.

●

If a display error occurs, first check the

sensor.

If the error occurs even when there is

no ice, snow or mud on the sensor, it is

likely that the sensor is malfunctioning.

■

Notes when washing the vehicle

Do not apply intensive bursts of water or

steam to the sensor area.

Doing so may result in the sensor mal-

functioning.

●

When using a high pressure washer to

wash the vehicle, do not spray the sen-

sors directly, as doing so may cause a

sensor to malfunction.

195

4-5. Using the driving support systems

Driving

■

The intuitive parking assist can be oper-

ated when

●

Front center sensors:

• The engine switch is in IGNITION ON

mode.

• The shift lever is in a position other than P

or R.

• The vehicle speed is less than about 6

mph (10 km/h).

●

Front corner sensors:

• The engine switch is in IGNITION ON

mode.

• The shift lever is in a position other than P.

• The vehicle speed is less than about 6

mph (10 km/h).

(At any speed when the shift lever is in R)

●

Rear corner and rear center sensors:

• The engine switch is in IGNITION ON

mode.

• The shift lever is in R.

■

Muting the buzzer sound

●

To mute the buzzer sound:

The buzzer can be temporarily muted by

pressing “OK” of the meter control

switches while an obstacle detection dis-

play is shown on the multi-information dis-

play.

●

To cancel the mute:

Mute will be automatically canceled in the

following situations.

• When the shift position is changed

(except shifting from D to N, or N to D).

• When the vehicle speed has reached or

exceeded 6 mph (10 km/h) with the shift

position in D.

• When the intuitive parking assist is turned

off once and turned on again.

• When the engine switch is turned off

once and turned to IGNITION ON

mode again.

■

If “Clean Parking Assist Sensor” is dis-

played on the multi-information display

A sensor may be covered with ice, snow,

dirt, etc. Remove the ice, snow, dirt, etc.,

from the sensor to return the system to nor-

mal.
Also, due to ice forming on a sensor at low

temperatures, a warning message may be

displayed or the sensor may not be able to

detect an object. Once the ice melts, the

system will return to normal.

■

Sensor detection information

●

The following situations may occur

during use.

• The sensors may be able to only detect

objects near the front and rear bumpers.

• Depending on the shape of the object

and other factors, the detection distance

may shorten, or detection may be impos-

sible.

• There will be a short delay between

object detection and display. Even at low

speeds, there is a possibility that the

object will come within the sensor’s

detection areas before the display is

shown and the warning beep sounds.

• It might be difficult to hear the buzzer due

to the volume of the audio system or air

flow noise of the air conditioning system.

• It may be difficult to hear the buzzer if

buzzers for other systems are sounding.

■

Conditions under which the function

may not function correctly

Certain vehicle conditions and the sur-

rounding environment may affect the ability

of a sensor to correctly detect objects. Par-

ticular instances where this may occur are

listed below.

●

There is dirt, snow or ice on a sensor.

(Cleaning the sensors will resolve this

problem.)

●

A sensor is frozen. (Thawing the area will

resolve this problem.)

In especially cold weather, if a sensor is

frozen the sensor display may be dis-

played abnormally, or objects, such as a

wall, may not be detected.

●

A sensor is covered in any way.

●

When a sensor or the area around a sen-

sor is extremely hot or cold.

WARNING

●

When using steam to clean the vehicle,

do not direct steam too close to the

sensors as doing so may cause a sen-

sor to malfunction.

196

4-5. Using the driving support systems

●

On an extremely bumpy road, on an

incline, on gravel, or on grass.

●

The vicinity of the vehicle is noisy due to

vehicle horns, motorcycle engines, air

brakes of large vehicles, or other loud

noises producing ultrasonic waves.

●

There is another vehicle equipped with

parking assist sensors in the vicinity.

●

A sensor is coated with a sheet of spray

or heavy rain.

●

If a sensor is hit by a large amount of

water, such as when driving on a flooded

road.

●

If the vehicle is significantly tilted.

●

The vehicle is approaching a tall or

curved curb.

●

If objects draw too close to the sensor.

■

Objects which may not be properly

detected

The shape of the object may prevent the

sensor from detecting it. Pay particular

attention to the following objects:

●

Wires, fences, ropes, etc.

●

Cotton, snow and other materials that

absorb sound waves

●

Sharply-angled objects

●

Low objects

●

Tall objects with upper sections project-

ing outwards in the direction of your vehi-

cle

People may not be detected if they are

wearing certain types of clothing.

■

Customization

Settings can be changed. (



P.370)

■

Multi-information display and Center Display

Sensors that detect an obstacle will illuminate continuously or blink.



Approximate distance to object: 3.3 ft. (100 cm) to 1.6 ft. (50 cm) (Front center
sensor)
Approximate distance to object: 4.9 ft. (150 cm) to 2.0 ft. (60 cm) (Rear center
sensor)



Approximate distance to object: 1.6 ft. (50 cm) to 1.3 ft. (40 cm) (Front corner
sensor/front center sensor)
Approximate distance to object: 2.0 ft. (60 cm) to 1.5 ft. (45 cm) (Rear corner
sensor/rear center sensor)

Sensor detection display, obstacle distance

Multi-information display

Insert display (Center Display)

(continuous)

(blinking slowly)

197

4-5. Using the driving support systems

Driving



Approximate distance to object: 1.3 ft. (40 cm) to 1.0 ft. (30 cm) (Front corner
sensor/front center sensor)
Approximate distance to object: 1.5 ft. (45 cm) to 1.0 ft. (30 cm) (Rear corner
sensor)
Approximate distance to object: 1.5 ft. (45 cm) to 1.1 ft. (35 cm) (Rear center
sensor)



Approximate distance to object: Less than 1.0 ft. (30 cm) (Corner sensor/front
center sensor)
Approximate distance to object: Less than 1.1 ft. (35 cm) (Rear center sensor)

■

Buzzer operation and distance to
an obstacle

A buzzer sounds when the sensors are
operating.



The buzzer beeps faster as the vehi-
cle approaches an obstacle. When
the vehicle comes within the follow-
ing distance of the obstacle, the
buzzer sounds continuously:

• Front center sensors: Approximately 1.0

ft. (30 cm)

• Corner sensors: Approximately 1.0 ft.

(30 cm)

• Rear center sensors: Approximately 1.1 ft.

(35 cm)



When 2 or more obstacles are
detected simultaneously, the buzzer
system responds to the nearest
obstacle. If one or both come within

Multi-information display

Insert display (Center Display)

(continuous)

(blinking)

Multi-information display

Insert display (Center Display)

(continuous)

(blinking rapidly)

Multi-information display

Insert display (Center Display)

(blinking)

(continuous)

198

4-5. Using the driving support systems

the above distances, the beep will
repeat a long tone, followed by fast
beeps.

Approximately 3.3 ft. (100 cm)
Approximately 4.9 ft. (150 cm)
Approximately 1.6 ft. (50 cm)
Approximately 2.0 ft. (60 cm)

The diagram shows the detection range of
the sensors. Note that the sensors cannot
detect obstacles that are extremely close
to the vehicle.
The range of the sensors may change
depending on the shape of the object, etc.

You can change the warning beep vol-
ume and Center Display operating
conditions.

Press the “MENU” button on the
Remote Touch. (



P.218)

Select “Setup” on the “Menu”
screen.

Select “Vehicle” on the “Setup”
screen.

Select “LEXUS Park Assist” on the
vehicle settings screen.

Select the desired button.

The alert volume can be adjusted.
Front center sensor display and
tone indication can be set.
Rear center sensor display and
tone indication can be set.

Detection range of the sensors

Setting up intuitive parking assist

A
B
C
D

A
B

199

4-5. Using the driving support systems

Driving

The Blind Spot Monitor is a system that
has 2 functions:



The BSM (Blind Spot Monitor) func-
tion
Assists the driver in making a deci-
sion when changing lanes



The RCTA (Rear Cross Traffic Alert)
function
Assists the driver when backing up

These functions use same sensors.

BSM main switch

This switch is for both the BSM function
and RCTA function.
Pressing the switch turns the system on or
off. When the switch is turned on, the indi-
cator on the switch illuminates.

Outside rear view mirror indicators

BSM function:
When a vehicle is detected in a blind spot
of the outside rear view mirrors or
approaching rapidly from behind into a
blind spot, the outside rear view mirror
indicator on the detected side will illumi-
nate. If the turn signal lever is operated
toward the detected side, the outside rear
view mirror indicator will flash.
RCTA function:
When a vehicle approaching from the right
or left at the rear of the vehicle is detected,
both outside rear view mirror indicators
will flash.

Center Display

If a vehicle approaching from the right or
left at the rear of the vehicle is detected,
the RCTA icon (



P.204) for the detected

side will be displayed on the Center Dis-
play.
This illustration shows an example of a
vehicle approaching from both sides of the
vehicle.

RCTA buzzer (RCTA function only)

If a vehicle approaching from the right or
left at the rear of the vehicle is detected, a
buzzer will sound. The buzzer also sounds
for approximately 1 second immediately
after the BSM main switch is operated to
turn the system on.

■

Outside rear view mirror indicator visi-

bility

In strong sunlight, the outside rear view mir-

ror indicator may be difficult to see.

BSM (Blind Spot Monitor)

The Blind Spot Monitor is a system
that uses rear side radar sensors
installed on the inner side of the
rear bumper on the left and right
side to assist the driver in confirm-
ing safety when changing lanes.

Summary of the Blind Spot Mon-
itor

200

4-5. Using the driving support systems

■

Hearing the RCTA buzzer

The RCTA buzzer may be difficult to hear

over loud noises, such as if the audio system

volume is high.

■

When “Blind Spot Monitor Unavailable”

is shown on the multi-information dis-

play

Ice, snow, mud, etc., may be attached to the

rear bumper around the sensors.

(



P.200) The system should return to nor-

mal operation after removing the ice, snow,

mud, etc. from the rear bumper. Addition-

ally, the sensors may not operate normally

when driving in extremely hot or cold envi-

ronments.

■

When there is a malfunction in the Blind

Spot Monitor

If a system malfunction is detected due to

any of the following, a warning message will

be displayed: (



P.313)

●

A sensor is malfunctioning

●

A sensor is dirty or covered with snow or

a sticker

●

The outside temperature is extremely

high or low

●

Sensor voltage is abnormal

●

A sensor is misaligned

WARNING

■

Handling the radar sensor

Blind Spot Monitor sensors are installed

behind the left and right sides of the rear

bumper respectively. Observe the fol-

lowing to ensure the Blind Spot Monitor

can function correctly.

●

Keep the sensors and the surrounding

areas on the rear bumper clean at all

times.

If a sensor or its surrounding area on

the rear bumper is dirty or covered

with snow, the Blind Spot Monitor may

not operate and a warning message

(



P.313) will be displayed. In this situ-

ation, clear off the dirt or snow and

drive the vehicle with the operation

conditions of the BSM function

(



P.202) satisfied for approximately

10 minutes. If the warning message

does not disappear, have the vehicle

inspected by your Lexus dealer.

●

Do not subject a sensor or its sur-

rounding area on the rear bumper to a

strong impact.

If a sensor is moved even slightly off

position, the system may malfunction

and vehicles may not be detected cor-

rectly.

In the following situations, have your

vehicle inspected by your Lexus

dealer.

• A sensor or its surrounding area is

subject to a strong impact.

• If the surrounding area of a sensor is

scratched or dented, or part of them

has become disconnected.

●

Do not disassemble the sensor.

●

Do not attach stickers to the sensor or

surrounding area on the rear bumper.

●

Do not modify the sensor or surround-

ing area on the rear bumper.

●

Do not paint the rear bumper any

color other than an official Lexus color.

201

4-5. Using the driving support systems

Driving

The BSM function uses radar sensors to detect the following vehicles traveling in
adjacent lanes and advises the driver of the presence of such vehicles via the indi-
cators on the outside rear view mirrors.

WARNING

■

Cautions regarding the use of the

function

The driver is solely responsible for safe

driving. Always drive safely, taking care

to observe your surroundings.

The BSM function is a supplementary

function which alerts the driver that a

vehicle is in a blind spot of the outside

rear view mirrors or is approaching rap-

idly from behind into a blind spot. Do not

overly rely on the BSM function. As the

function cannot judge if it is safe to

change lanes, over reliance could lead to

an accident resulting in death or serious

injury.

As the system may not function correctly

under certain conditions, the driver’s own

visual confirmation of safety is necessary.

The RCTA function is only a supplemen-

tary function which alerts the driver that a

vehicle is approaching from the right or

left at the rear of the vehicle. As the

RCTA function may not function cor-

rectly under certain conditions, the

driver’s own visual confirmation of safety

is necessary. Over reliance on this func-

tion may lead to an accident resulting

death or serious injury.

BSM function

202

4-5. Using the driving support systems

Vehicles that are traveling in areas that are not visible using the outside rear
view mirrors (the blind spots)
Vehicles that are approaching rapidly from behind in areas that are not visible
using the outside rear view mirrors (the blind spots)

The areas that vehicles can be detected in are outlined below.

The range of each detection area is:

Approximately 1.6 ft. (0.5 m) to 11.5 ft. (3.5 m) from either side of the vehicle

Approximately 3.3 ft. (1 m) forward of the rear bumper
Approximately 9.8 ft. (3 m) from the rear bumper

Approximately 9.8 ft. (3 m) to 197 ft. (60 m) from the rear bumper

: The area between the side of the vehicle and 1.6 ft. (0.5 m) from the side of the vehicle

cannot be detected.

: The greater the difference in speed between your vehicle and the detected vehicle is,

the farther away the vehicle will be detected, causing the outside rear view mirror indi-
cator to illuminate or flash.

■

The BSM function is operational when

The BSM function is operational when all of

the following conditions are met:

●

The BSM main switch is on.

●

The shift lever is in a position other than R.

●

The vehicle speed is greater than approx-

imately 10 mph (16 km/h).

■

The BSM function will detect a vehicle

when

The BSM function will detect a vehicle pres-

ent in the detection area in the following sit-

uations:

●

A vehicle in an adjacent lane overtakes

your vehicle.

●

You overtake a vehicle in an adjacent lane

slowly.

●

Another vehicle enters the detection

area when it changes lanes.

■

Conditions under which the BSM func-

tion will not detect a vehicle

The BSM function is not designed to detect

the following types of vehicles and/or

objects:

●

Small motorcycles, bicycles, pedestrians,
etc.

BSM function detection areas

A
B
C
D

203

4-5. Using the driving support systems

Driving

●

Vehicles traveling in the opposite direc-

tion

●

Guardrails, walls, signs, parked vehicles
and similar stationary objects

●

Following vehicles that are in the same
lane

●

Vehicles traveling 2 lanes away from your
vehicle

●

Vehicles which are being overtaken rap-
idly by your vehicle

: Depending on the conditions, detection

of a vehicle and/or object may occur.

■

Conditions under which the BSM func-

tion may not function correctly

●

The BSM function may not detect vehi-

cles correctly in the following situations:

• When the sensor is misaligned due to a

strong impact to the sensor or its sur-

rounding area

• When mud, snow, ice, a sticker, etc. is

covering the sensor or surrounding area

on the rear bumper

• When driving on a road surface that is

wet with standing water during bad

weather, such as heavy rain, snow, or fog

• When multiple vehicles are approaching

with only a small gap between each vehi-

cle

• When the distance between your vehicle

and a following vehicle is short

• When there is a significant difference in

speed between your vehicle and the vehi-

cle that enters the detection area

• When the difference in speed between

your vehicle and another vehicle is

changing

• When a vehicle enters a detection area

traveling at about the same speed as your

vehicle

• As your vehicle starts from a stop, a vehi-

cle remains in the detection area

• When driving up and down consecutive

steep inclines, such as hills, dips in the

road, etc.

• When driving on roads with sharp bends,

consecutive curves, or uneven surfaces

• When vehicle lanes are wide, or when

driving on the edge of a lane, and the

vehicle in an adjacent lane is far away

from your vehicle

• When a bicycle carrier or other acces-

sory is installed to the rear of the vehicle

• When there is a significant difference in

height between your vehicle and the

vehicle that enters the detection area

• Immediately after the BSM main switch is

turned on

●

Instances of the BSM function unneces-

sarily detecting a vehicle and/or object

may increase in the following situations:

• When the sensor is misaligned due to a

strong impact to the sensor or its sur-

rounding area

• When the distance between your vehicle

and a guardrail, wall, etc. that enters the

detection area is short

• When driving up and down consecutive

steep inclines, such as hills, dips in the

road, etc.

• When vehicle lanes are narrow, or when

driving on the edge of a lane, and a vehi-

cle traveling in a lane other than the adja-

cent lanes enters the detection area

• When driving on roads with sharp bends,

consecutive curves, or uneven surfaces

• When the tires are slipping or spinning

• When the distance between your vehicle

and a following vehicle is short

• When a bicycle carrier or other acces-

sory is installed to the rear of the vehicle

■

Operation of the RCTA function

The RCTA function uses radar sensors to detect vehicles approaching from the
right or left at the rear of the vehicle and alerts the driver of the presence of such
vehicles by flashing the outside rear view mirror indicators and sounding a buzzer.

RCTA function

205

4-5. Using the driving support systems

Driving

■

The RCTA function is operational when

The RCTA function operates when all of the

following conditions are met:

●

The BSM main switch is on.

●

The shift lever is in R.

●

The vehicle speed is less than approxi-

mately 9 mph (15 km/h).

●

The approaching vehicle speed is

between approximately 5 mph (8 km/h)

and 34 mph (56 km/h).

■

Conditions under which the RCTA func-

tion will not detect a vehicle

The RCTA function is not designed to

detect the following types of vehicles and/or

objects:

●

Vehicles approaching from directly

behind

●

Vehicles backing up in a parking space

next to your vehicle

●

Vehicles that the sensors cannot detect

due to obstructions

●

Guardrails, walls, signs, parked vehicles
and similar stationary objects

●

Small motorcycles, bicycles, pedestrians,
etc.

●

Vehicles moving away from your vehicle

●

Vehicles approaching from the parking
spaces next to your vehicle

: Depending on the conditions, detection

of a vehicle and/or object may occur.

■

Conditions under which the RCTA func-

tion may not function correctly

●

The RCTA function may not detect vehi-

cles correctly in the following situations:

• When the sensor is misaligned due to a

strong impact to the sensor or its sur-

rounding area

• When mud, snow, ice, a sticker, etc. is

covering the sensor or surrounding area

on the rear bumper

• When driving on a road surface that is

wet with standing water during bad

weather, such as heavy rain, snow, or fog

• When multiple vehicles are approaching

with only a small gap between each vehi-

cle

• When a vehicle is approaching at high

speed

• When backing up on a slope with a sharp

change in grade

●

When backing out of a shallow angle

parking spot

Approaching vehicle

Speed

Approximate alert dis-

tance

Fast

34 mph (56 km/h)

100 ft. (30 m)

Slow

5 mph (8 km/h)

13 ft. (4 m)

206

4-5. Using the driving support systems

●

Immediately after the BSM main switch is

turned on

●

Immediately after the engine is started

with the BSM main switch on

●

When the sensors cannot detect a vehi-

cle due to obstructions

●

Instances of the RCTA function unneces-

sarily detecting a vehicle and/or object

may increase in the following situations:

• When a vehicle passes by the side of your

vehicle

• When the parking space faces a street

and vehicles are being driven on the

street

●

When the distance between your vehicle

and metal objects, such as a guardrail,

wall, sign, or parked vehicle, which may

reflect electrical waves toward the rear of

the vehicle, is short



Vehicles without Adaptive Variable
Suspension System

Normal mode

Provides an optimal balance of fuel econ-
omy, quietness, and dynamic performance.
Suitable for city driving.
Press the switch to change the driving
mode to Normal mode when Eco drive
mode or Sport mode is selected.

Eco drive mode

Helps the driver accelerate in an
eco-friendly manner and improve fuel
economy through moderate throttle char-
acteristics and by controlling the operation
of the air conditioning system (heat-
ing/cooling).
When not in Eco drive mode, if the driving
mode select switch is turned to the left, the
Eco drive mode indicator will come on.

Sport mode

Driving mode select switch

The driving modes can be selected
to suit driving condition.

Selecting a drive mode

207

4-5. Using the driving support systems

Driving

Controls the transmission and engine to
provide quick, powerful acceleration. This
mode also changes the steering feel, mak-
ing it suitable for when agile driving
response is desired, such as when driving
on roads with many curves.
When not in Sport mode, if the driving
mode select switch is turned to the right,
the Sport mode indicator will comes on.



Vehicles with Adaptive Variable
Suspension System

Normal mode/Custom mode

Normal mode and Custom mode are
selected by pressing the driving mode
select switch. Each time the switch is
pressed, the driving mode changes
between Normal mode and Custom
mode. When Custom mode is selected,
the Custom mode indicator will be illumi-
nated.
When Eco drive mode or Sport mode is
selected, pressing the switch changes the
driving mode to Normal mode.
• Normal mode
Provides an optimal balance of fuel econ-
omy, quietness, and dynamic performance.
Suitable for city driving.
• Custom mode
Allows you to drive with the following func-

tions set to your preferred settings.
Custom mode settings can only be
changed on the drive mode customization
display of the Center Display. (



P.220)

Eco drive mode

Sport mode

• Sport S mode
Controls the transmission and engine to
provide quick, powerful acceleration. Also,
gear shift timing is controlled to suit sporty
driving, making this mode is suitable for
when agile driving response is desired,
such as when driving on roads with many
curves.
When not in Sport S mode, if the driving
mode select switch is turned to the right,
the Sport S mode indicator will come on.
• Sport S+ mode
Provides earlier downshift timing than
Sport S mode in order to maintain a high
engine speed and provides faster gear

Function

Setting

Powertrain

Normal

Power

Eco

Chassis

Normal

Sport

Air conditioning sys-
tem

Normal

Eco

208

4-5. Using the driving support systems

changes. This mode also changes the
steering feel, suspension control and
VDIM control, making it suitable for pow-
erful sporty driving.
When in Sport S mode, if the driving mode
select switch is turned to the right, the
Sport S+ mode indicator will come on.

■

Operation of the air conditioning sys-

tem in Eco drive mode

Eco drive mode controls the heating/cool-

ing operations and fan speed of the air con-

ditioning system to enhance fuel efficiency

(



P.223). To improve air conditioning per-

formance, adjust the fan speed or turn off

Eco drive mode.

■

Automatic deactivation of Sport mode

and Custom mode

If the engine switch is turned off after driv-

ing in Sport mode or Custom mode, the

drive mode will be changed to Normal

mode.

■

Driving mode pop-up display (vehicles

with a 10.3-inch display)

When the driving mode is changed, the

selected driving mode will be temporarily

displayed on the side display. (



P.220)

■

ABS (Anti-lock Brake System)

Helps to prevent wheel lock when the
brakes are applied suddenly, or if the
brakes are applied while driving on a
slippery road surface

■

Brake assist

Generates an increased level of brak-
ing force after the brake pedal is
depressed when the system detects a
panic stop situation

■

VSC (Vehicle Stability Control)

Helps the driver to control skidding
when swerving suddenly or turning on
slippery road surfaces

■

Enhanced VSC (Enhanced Vehi-
cle Stability Control)

Provides cooperative control of the
ABS, TRAC, VSC and EPS.
Helps to maintain directional stability
when swerving on slippery road sur-
faces by controlling steering perfor-
mance.

Driving assist systems

To keep driving safety and perfor-
mance, the following systems oper-
ate automatically in response to
various driving situations. Be aware,
however, that these systems are
supplementary and should not be
relied upon too heavily when oper-
ating the vehicle.

Summary of the driving assist
systems

209

4-5. Using the driving support systems

Driving

■

TRAC (Traction Control)

Helps to maintain drive power and pre-
vent the drive wheels from spinning
when starting the vehicle or accelerat-
ing on slippery roads

■

Hill-start assist control

Helps to reduce the backward move-
ment of the vehicle when starting on an
uphill

■

VGRS (Variable Gear Ratio Steer-
ing) (if equipped)

Adjusts the front wheel turning angle in
accordance with the vehicle speed and
steering wheel movement

■

DRS (Dynamic Rear Steering) (if
equipped)

Contributes to the turning characteris-
tics and responsiveness of the vehicle
by adjusting the rear wheel angle of the
vehicle in accordance with steering
wheel movement.

■

EPS (Electric Power Steering)

Employs an electric motor to reduce
the amount of effort needed to turn the
steering wheel

■

Adaptive Variable Suspension Sys-
tem (if equipped)

By independently controlling the
damping force of the shock absorbers
for each of the 4 wheels according to
the road and driving conditions, this
system combines riding comfort with
superior vehicle stability, and helps
good vehicle posture.

■

LDH (Lexus Dynamic Handling
system) (if equipped)

Provides integrated control of the
VGRS, DRS and EPS. Contributes to
turning characteristics at low speeds,
responsiveness at medium speeds and
safety at high speeds by controlling the
steering angle of the front and rear
wheels in accordance with the steering
wheel operation and vehicle speed.

■

VDIM (Vehicle Dynamics Inte-
grated Management)

Provides integrated control of the
ABS, brake assist, TRAC, VSC,
hill-start assist control, EPS and VGRS
systems
Helps to maintain vehicle stability when
swerving on slippery road surfaces by
controlling the brakes, engine output,
steering assist, and steering ratio

■

When the TRAC/VSC systems are

operating

The slip indicator light will flash while the

TRAC/VSC systems are operating.

■

Disabling the TRAC system

If the vehicle gets stuck in mud, dirt or snow,

the TRAC system may reduce power from
the engine to the wheels. Pressing the

switch to turn the system off may make it

easier for you to rock the vehicle in order to

free it.
To turn the TRAC system off, quickly press

210

4-5. Using the driving support systems

and release the

switch.

The “Traction Control Turned Off” will be
shown on the multi-information display.

Press the

switch again to turn the sys-

tem back on.

■

Turning off both TRAC and VSC sys-

tems

To turn the TRAC and VSC systems off,
press and hold the

switch for more

than 3 seconds while the vehicle is stopped.
The VSC OFF indicator light will come on
and the “Traction Control Turned Off” will
be shown on the multi-information display.

Press the

switch again to turn the sys-

tems back on.

: On vehicles with PCS (Pre-Collision

System), pre-collision brake assist and
pre-collision braking will also be dis-
abled. The Pre-Collision System warning
light will come on and a message will be
displayed on the multi-information dis-
play. (



P.171)

■

When the message is displayed on the

multi-information display showing that

TRAC has been disabled even if the

switch has not been pressed

TRAC is temporary deactivated. If the infor-

mation continues to show, contact your

Lexus dealer.

■

Operating conditions of hill-start assist

control

When the following four conditions are met,

the hill-start assist control will operate:

●

The shift lever is in a position other than P

or N (when starting off forward/back-

ward on an upward incline).

●

The vehicle is stopped.

●

The accelerator pedal is not depressed.

●

The parking brake is not engaged.

●

Engine switch is turned to IGNITION

ON mode

■

Automatic system cancelation of

hill-start assist control

The hill-start assist control will turn off in any

of the following situations:

●

The shift lever is moved to P or N.

●

The accelerator pedal is depressed.

●

The parking brake is engaged.

●

2 seconds at maximum elapsed after the

brake pedal is released

●

Engine switch is turned to off

■

VGRS is disabled when

VGRS may stop operating in the following

situations.

In this event, the steering wheel may move

from its straight forward position, but it will

return when the system restarts.

●

When the steering wheel is operated for

an extended period of time while the

vehicle is stopped or is moving very

slowly

(on vehicles with LDH, DRS is disabled

together with VGRS)

●

When the steering wheel has been held

fully to the left or right

The center position of the steering wheel

may change when VGRS is disabled. How-

211

4-5. Using the driving support systems

Driving

ever, the position will return to normal after

VGRS is reactivated.

■

When the battery is disconnected (vehi-

cles with VGRS)

The steering wheel may move from its

straight forward position, but this will be

corrected automatically when driving.

■

Sounds and vibrations caused by the

ABS, brake assist, VSC, TRAC, hill-start

assist control and VGRS systems

●

A sound may be heard from the engine

compartment when the brake pedal is

depressed repeatedly, when the engine is

started or just after the vehicle begins to

move. This sound does not indicate that a

malfunction has occurred in any of these

systems.

●

Any of the following conditions may

occur when the above systems are oper-

ating. None of these indicates that a mal-

function has occurred.

• Vibrations may be felt through the vehicle

body and steering.

• A motor sound may be heard also after

the vehicle comes to a stop.

• The brake pedal may pulsate slightly after

the ABS is activated.

• The brake pedal may move down slightly

after the ABS is activated.

■

EPS, VGRS and DRS operation sound

When the steering wheel is operated, a

motor sound (whirring sound) may be

heard. This does not indicate a malfunction.

■

Automatic reactivation of TRAC/VSC

systems

After turning the TRAC and VSC systems

off, the systems will be automatically

re-enabled in the following situations:

●

When the engine switch is turned off

●

If only the TRAC system is turned off, the

TRAC will turn on when vehicle speed

increases

If both the TRAC and VSC systems are
turned off, automatic re-enabling will not
occur when vehicle speed increases.

■

Reduced effectiveness of the EPS sys-

tem

The effectiveness of the EPS system is

reduced to prevent the system from over-

heating when there is frequent steering

input over an extended period of time. The

steering wheel may feel heavy as a result.

Should this occur, refrain from excessive

steering input or stop the vehicle and turn

the engine off. The EPS system should

return to normal within 10 minutes.

WARNING

■

The ABS does not operate effectively

when

●

The limits of tire gripping performance

have been exceeded (such as exces-

sively worn tires on a snow covered

road).

●

The vehicle hydroplanes while driving

at high speed on wet or slick roads.

■

Stopping distance when the ABS is

operating may exceed that of normal

conditions

The ABS is not designed to shorten the

vehicle’s stopping distance. Always main-

tain a safe distance from the vehicle in

front of you, especially in the following

situations:

●

When driving on dirt, gravel or

snow-covered roads

●

When driving with tire chains

●

When driving over bumps in the road

●

When driving over roads with potholes

or uneven surfaces

■

TRAC/VSC may not operate effec-

tively when

Directional control and power may not

be achievable while driving on slippery

road surfaces, even if the TRAC/VSC

system is operating. Drive the vehicle

carefully in conditions where stability and

power may be lost.

212

4-5. Using the driving support systems

WARNING

■

Hill-start assist control does not oper-

ate effectively when

●

Do not overly rely on hill-start assist

control. Hill-start assist control may

not operate effectively on steep

inclines and roads covered with ice.

●

Unlike the parking brake, hill-start

assist control is not intended to hold

the vehicle stationary for an extended

period of time. Do not attempt to use

hill-start assist control to hold the vehi-

cle on an incline, as doing so may lead

to an accident.

■

When the TRAC/VSC is activated

The slip indicator light flashes. Always

drive carefully. Reckless driving may

cause an accident. Exercise particular

care when the indicator light flashes.

■

When the TRAC/VSC systems are

turned off

Be especially careful and drive at a speed

appropriate to the road conditions. As

these are the systems to help ensure

vehicle stability and driving force, do not

turn the TRAC/VSC systems off unless

necessary.

■

Replacing tires

Make sure that all tires are of the speci-

fied size, brand, tread pattern and total

load capacity. In addition, make sure that

the tires are inflated to the recom-

mended tire inflation pressure level.

The ABS, TRAC and VSC systems will

not function correctly if different tires are

installed on the vehicle.

Contact your Lexus dealer for further

information when replacing tires or

wheels.

■

Handling of tires and the suspension

Using tires with any kind of problem or

modifying the suspension will affect the

driving assist systems, and may cause a

system to malfunction.

213

4-6. Driving tips

Driving

4-6.Driving tips



Use fluids that are appropriate to
the prevailing outside temperatures.

• Engine oil
• Engine coolant
• Washer fluid



Have a service technician inspect
the condition of the battery.



Have the vehicle fitted with four
snow tires or purchase a set of tire
chains for the rear tires.

Ensure that all tires are the specified size
and brand, and that chains match the size
of the tires.

: Tire chains cannot be mounted on vehi-

cles with front and rear tires of differing
sizes and vehicles with LDH and 19-inch
tires.

Perform the following according to the

Winter driving tips

Carry out the necessary prepara-
tions and inspections before driving
the vehicle in winter. Always drive
the vehicle in a manner appropriate
to the prevailing weather condi-
tions.

Preparation for winter

WARNING

■

Driving with snow tires

Observe the following precautions to

reduce the risk of accidents.

Failure to do so may result in a loss of

vehicle control and cause death or seri-

ous injury.

●

Use tires of the specified size.

●

Maintain the recommended level of air

pressure.

●

Do not drive in excess of 75 mph (120

km/h), regardless of the type of snow

tires being used.

●

Use snow tires on all, not just some

wheels.

■

Driving with tire chains

Observe the following precautions to

reduce the risk of accidents.

Failure to do so may result in the vehicle

being unable to be driven safely, and may

cause death or serious injury.

●

Do not drive in excess of the speed

limit specified for the tire chains being

used, or 30 mph (50 km/h), which-

ever is lower.

●

Avoid driving on bumpy road surfaces

or over potholes.

●

Avoid sudden acceleration, abrupt

steering, sudden braking and shifting

operations that cause sudden engine

braking.

●

Slow down sufficiently before entering

a curve to ensure that vehicle control is

maintained.

●

Do not use LTA (Lane Tracing Assist)

system.

NOTICE

■

Repairing or replacing snow tires

Request repairs or replacement of snow

tires from Lexus dealers or legitimate tire

retailers.

This is because the removal and attach-

ment of snow tires affects the operation

of the tire pressure warning valves and

transmitters.

Before driving the vehicle

Lexus RC300 (2023 year). Manual in english - page 6