Lexus RC350 (2022 year). Manual in english - page 10

168

4-5. Using the driving support systems

■

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.

169

4-5. Using the driving support systems

4

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

A

170

4-5. Using the driving support systems

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.172)

●

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.171)

●

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.172)

■

Temporary cancellation of functions

When the operation conditions are no lon-

ger met, a function may be temporarily can-

B

C

171

4-5. Using the driving support systems

4

Driving

celed. However, when the operation 

conditions are met again, operation of the 

function is automatically restored. (



P.170)

■

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

In the following situations, a warning mes-

sage urging the driver to hold the steering 

wheel and the symbol shown in the illustra-

tion are displayed on the multi-information 

display to warn the driver.The warning stops 

when the system determines that the driver 

holds the steering wheel. Always keep your 

hands on the steering wheel when using this 

system, regardless of warnings.

●

When the system determines that the 

driver is driving without holding the steer-

ing wheel while the system is operating

If the driver continues to keep their hands 
off of the steering wheel, the buzzer 
sounds, the driver is warned and the func-
tion is temporarily canceled. This warning 
also operates in the same way when the 
driver continuously operates the steering 
wheel only a small amount.
The buzzer also sounds even if the alert 
type is set to 

.

Depending on the vehicle condition and 
road conditions, the warning may not 

operate. Also, if the system determines that 
the vehicle is driving around a curve, warn-
ings will occur earlier than during 
straight-lane driving.

●

When the system determines that the 

driver is driving without holding the steer-

ing wheel while the steering wheel assist 

of the steering assist function is operat-

ing.

If the driver continues to keep their hands 
off of the steering wheel and the steering 
wheel assist is operating, the buzzer 
sounds and the driver is warned. Each time 
the buzzer sounds, the continuing time of 
the buzzer becomes longer.
The buzzer also sounds even if the alert 
type is set to 

.

■

Vehicle sway warning function

When the system determines that the vehi-

cle is swaying while the vehicle sway warn-

ing function is operating, a buzzer sounds 

and a warning message urging the driver to 

rest and the symbol shown in the illustration 

are simultaneously displayed on the 

multi-information display.

Depending on the vehicle and road condi-

tions, the warning may not operate.

■

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.

172

4-5. Using the driving support systems

●

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 

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.

173

4-5. Using the driving support systems

4

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.351

“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.

“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

174

4-5. Using the driving support systems

Vehicle-to-vehicle distance switch
Display
Set speed
Indicators

Cruise control switch

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.176)



Constant speed control mode 
(



P.180)

System Components

A
B
C
D

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.182

• Conditions under which the vehi-

cle-to-vehicle distance control mode 

may not function correctly: 



P.182

●

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 with full-speed range off using the 

“ON/OFF” button when not in use.

E

175

4-5. Using the driving support systems

4

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 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 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 vehi-

cle and act appropriately in order to 

ensure the safety of all involved.

■

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 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

176

4-5. Using the driving support systems

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.
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 will resume follow-up cruising.

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

A

B

C

177

4-5. Using the driving support systems

4

Driving

1

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.180)

2

Accelerate or decelerate, with 
accelerator pedal operation, to the 
desired vehicle speed (at or above 
approximately 30 mph [50 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.
If the lever is operated while the vehicle 

speed is below approximately 30 mph (50 

km/h) and a preceding vehicle is present, 

the set speed will be adjusted to approxi-

mately 30 mph (50 km/h).

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

1

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

2

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)

*1

 or 1 

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

Adjusting the set speed

178

4-5. Using the driving support systems

km/h (0.6 mph)

*2

 each time the lever is 

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

*1

 or 1 km/h (0.6 mph)

*2

 

increments for as long as the lever is held

■

For Canada, Guam and Puerto 
Rico

Fine adjustment: By 1 mph (1.6 km/h)

*1

 or 1 

km/h (0.6 mph)

*2

 each time the lever is 

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

*1

 or 5 km/h (3.1 mph)

*2

 

increments for as long as the lever is held

In the constant speed control mode 
(



P.180), the set speed will be 

increased or decreased as follows:

Fine adjustment: By 1 mph (1.6 km/h)

*1

 or 

1.6 km/h (1 mph)

*2

 each time the lever is 

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

*1

: When the set speed is shown in “MPH”

*2

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

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

1

Long

2

Medium

3

Short

The vehicle-to-vehicle distance is set auto-
matically to long mode when the engine 
switch is turned to IGNITION ON mode.
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)

Distance 

options

Vehicle-to-vehicle dis-

tance

Long

Approximately 160 ft. (50 
m)

A

179

4-5. Using the driving support systems

4

Driving

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.

1

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.)

2

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

However, when a vehicle ahead is not 
detected, cruise control does not resume 
when the vehicle speed is approximately 
25 mph (40 km/h) or less.

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.

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)

Distance 

options

Vehicle-to-vehicle dis-

tance

Canceling and resuming the 
speed control

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

180

4-5. Using the driving support systems

■

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

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

1

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.

2

Accelerate or decelerate, with 
accelerator pedal operation, to the 
desired vehicle speed (at or above 
approximately 30 mph [50 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.177

Canceling and resuming the speed setting: 



P.179

■

Dynamic radar cruise control with 

full-speed range can be set when

●

The shift lever is in D.

●

Range 4 or higher of D has been selected 

by using the paddle shift switch.

●

Vehicle speed is at or above approxi-

Selecting constant speed con-
trol mode

181

4-5. Using the driving support systems

4

Driving

mately 30 mph (50 km/h).

However, when a preceding vehicle is 

detected, the dynamic radar cruise con-

trol with full-speed range can be set even 

if the vehicle speed is below approxi-

mately 30 mph (50 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:

●

Actual vehicle speed falls at or below 

approximately 25 mph (40 km/h) when 

there are no vehicles ahead.

●

The preceding vehicle leaves the lane 

when your vehicle is following at a vehicle 

speed at or below approximately 25 mph 

(40 km/h). Otherwise, the sensor can 

not properly detect the vehicle. (“Radar 

Cruise Control Not Available No Pre-

ceding Vehicles” is displayed on the 

multi-information display)

●

VSC is activated.

●

TRAC is activated for a period of time.

●

When the VSC or TRAC system is 

turned off.

●

When snow mode is set.

●

The sensor cannot detect correctly 

because it is covered in some way.

●

Pre-collision braking is activated.

●

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 25 mph (40 km/h).

●

VSC is activated.

●

TRAC is activated for a period of time.

●

When the VSC or TRAC system is 

turned off.

●

Pre-collision braking is activated.

If constant speed control mode is automati-

cally canceled for any other reason, there 

may be a malfunction in the system. Con-

tact your Lexus dealer.

■

Brake system operation sound

If the brakes are applied automatically while 

the vehicle is in vehicle-to-vehicle distance 

control mode, a brake system operation 

sound may be heard. This does not indicate 

a malfunction.

■

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 

182

4-5. Using the driving support systems

multi-information display, read the message 

and follow the instructions.

■

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.179) 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.)

●

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

183

4-5. Using the driving support systems

4

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