Lexus NX300h (2021 year). Manual in english - page 14

236

4-5. Using the driving support systems

A non-official or a recently introduced traf-
fic sign may not be recognized.

: Speed limit

: Do Not Enter

: Stop

: Yield

In the following situations, the RSA sys-
tem will notify the driver.



When the vehicle speed exceeds 
the speed notification threshold of 
the speed limit sign displayed, the 
sign display will be emphasized and 
a buzzer will sound.



When the RSA system recognizes a 
do not enter sign and determines 
that your vehicle has entered a no-
entry area, the displayed sign will 
flash and a buzzer will sound.

Depending on the situation, a notifica-
tion function may not operate properly.

■

Setting procedure

1

Press 

 or 

 of the meter control 

switches and select 

2

Press 

 or 

 of the meter control 

switches and select 

, then press 

3

Press 

 or 

 of the meter control 

switches, select the desired setting, and 
then press 

■

Automatic turn-off of RSA sign display

In the following situations a displayed speed 

limit sign and/or do not enter signs will stop 

being displayed automatically:

●

No sign has been recognized for a cer-

tain distance.

●

The road changes due to a left or right 

turn, etc.

In the following situations, stop and yield 

signs will stop being displayed automati-

cally:

●

The system determines that your vehicle 

has passed the sign.

●

The road changes due to a left or right 

turn, etc.

■

Conditions in which the function may 

not operate or detect correctly

In the following situations, RSA does not 

operate normally and may not recognize 

signs, display the incorrect sign, etc. How-

ever, this does not indicate a malfunction.

●

The front camera is misaligned due to a 

strong impact being applied to the sen-

sor, etc.

●

Dirt, snow, stickers, etc. are on the wind-

shield near the front camera.

●

In inclement weather such as heavy rain, 

fog, snow or sand storms

●

Light from an oncoming vehicle, the sun, 

etc. enters the front camera.

●

The sign is dirty, faded, tilted or bent.

●

The contrast of electronic sign is low.

●

All or part of the sign is hidden by the 

leaves of a tree, a pole, etc.

●

The sign is only visible to the front camera 

for a short amount of time.

Notification function

237

4-5. Using the driving support systems

4

Driving

●

The driving scene (turning, lane change, 

etc.) is judged incorrectly.

●

If a sign not appropriate for the currently 

traveled lane, but the sign exists directly 

after a freeway branches, or in an adja-

cent lane just before merging.

●

Stickers are attached to the rear of the 

preceding vehicle.

●

A sign resembling a system compatible 

sign is recognized.

●

Side road speed signs may be detected 

and displayed (if positioned in sight of the 

front camera) while the vehicle is travel-

ing on the main road.

●

Roundabout exit road speed signs may 

be detected and displayed (if positioned 

in sight of the front camera) while travel-

ing on a roundabout.

●

The front of the vehicle is raised or low-

ered due to the carried load.

●

The surrounding brightness is not suffi-

cient or changes suddenly.

●

When a sign intended for trucks, etc. is 

recognized.

●

The 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 power 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 power switch is turned 

to 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.443)

In vehicle-to-vehicle distance control 
mode, the vehicle automatically accel-
erates, decelerates and stops to match 
the speed changes of the preceding 
vehicle even if the accelerator pedal is 
not depressed. In constant speed con-
trol mode, the vehicle runs at a fixed 
speed.
Use the dynamic radar cruise control 
with full-speed range on freeways and 
highways.



Vehicle-to-vehicle distance control 
mode (



P.240)



Constant speed control mode 
(



P.244)

Dynamic radar cruise con-
trol with full-speed range

Summary of functions

System Components

238

4-5. Using the driving support systems

Multi-information display

Set speed

Indicators

Vehicle-to-vehicle distance switch

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 carefully. 
Do not overly rely on this system and 
always drive carefully.
• When the sensor may not be correctly 

detecting the vehicle ahead:



P.245

• Conditions under which the vehicle-

to-vehicle distance control mode may 

not function correctly: 



P.246

●

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.

A
B
C
D

E

●

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.

239

4-5. Using the driving support systems

4

Driving

WARNING

●

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.

■

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

●

When your vehicle is towing a trailer 

or during emergency towing

●

When an approach warning buzzer is 

heard often

240

4-5. Using the driving support systems

This mode employs a radar to detect the presence of vehicles up to approximately 
328 ft. (100 m) ahead, determines the current vehicle-to-vehicle following dis-
tance, 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.

Driving in vehicle-to-vehicle distance control mode

A

B

241

4-5. Using the driving support systems

4

Driving

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 
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.

1

Press the “ON/OFF” button to 
activate 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.244)

2

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.

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

C

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

Adjusting the set speed

242

4-5. Using the driving support systems

1

Increases the speed

(Except when the vehicle has been 
stopped by system control in vehicle-to-
vehicle 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 control 
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 

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.244), the set speed will be increased 

or decreased as follows:

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: 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 power 
switch is turned to ON mode.
If a vehicle is running ahead of you, the pre-
ceding vehicle mark 

 will also be dis-

played.

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

A

243

4-5. Using the driving support systems

4

Driving

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.

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 control, 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.

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 

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

Distance options

Vehicle-to-vehicle 

distance

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 (vehicle-to-
vehicle distance control mode)

244

4-5. Using the driving support systems

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.

■

Warnings may not occur when

In the following instances, warnings 
may not occur even when the vehicle-
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, 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 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.241

Canceling and resuming the speed setting: 



P.243

Selecting constant speed con-
trol mode

245

4-5. Using the driving support systems

4

Driving

■

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 vehicle-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.

●

When the VSC or TRAC system is 

turned off.

●

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 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.

●

Pre-collision braking is activated.

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.

■

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.209, 398)

■

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 

246

4-5. Using the driving support systems

when acceleration is required.

As the sensor may not be able to correctly 

detect these types of vehicles, the approach 

warning (



P.243) 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 vehicle-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

247

4-5. Using the driving support systems

4

Driving

*

: If  equipped

■

Intuitive parking assist (if 
equipped)

Ultrasonic sensors are used to detect 
static objects in the detection area 
when driving at a low speed or backing 
up. (



P.248)

■

Adjusting the buzzer volume

The buzzer volume can be adjusted on 
the multi-information display.
Use the meter control switches to 
change settings. (



P.89)

1

Press 

 or 

 to select 

.

2

Press 

 or 

 to select “PKSA” 

and then press 

.

3

Press 

 or 

 to select 

 and 

then press 

.

Each time the switch is pressed, the volume 

level change between 1, 2, and 3.

■

Muting buzzer



P.249

PKSA (Parking Support 
Alert)

*

The Parking Support Alert system 
consists of the following functions 
that operate when driving at a low 
speed or backing up, such as when 
parking. When the system deter-
mines that a collision with a 
detected object, such as a wall is 
high, a warning operates to urge 
the driver to take evasive action.

PKSA (Parking Support Alert) 
system

Setting the buzzer volume

248

4-5. Using the driving support systems

*

: If  equipped

■

Types of sensors

Front corner sensors

Front center sensors

Rear corner sensors

Rear center sensors

■

Display

When the sensors detect an obstacle, 
the following displays inform the driver 
of the position and distance to the 
obstacle.



Multi-information display

Front corner sensor operation

Front center sensor operation

Rear corner sensor operation

Rear center sensor operation



Navigation or multimedia system



Lexus parking assist monitor



Panoramic view monitor

Intuitive parking assist can be 

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 displays 
and a buzzer. Always check the sur-
rounding area when using this sys-
tem.

System components

A
B
C
D

Turning intuitive parking assist 
on/off

A
B
C
D

249

4-5. Using the driving support systems

4

Driving

enabled/disabled on the multi-informa-
tion display as following:

1

Press 

 or 

 of meter control 

switches and select 

.

2

Press 

 or 

 of meter control 

switches and select “PKSA”.

3

Press 

 or 

 of meter control 

switches, select 

, and then press 

 to select the desired setting 

(on/off).

When ON (enable) is selected, the 
Intuitive parking assist indicator comes 
on.
When switched to OFF (disable) and 
the Intuitive parking assist is deacti-
vated, the system will not reactivate if it 
is not switched to ON again from the 

 screen of the multi-information dis-

play (Will not reactivate via power 
switch operations).

■

The intuitive parking assist can be oper-

ated when

●

The power switch is in ON mode.

●

Intuitive parking assist function is on.

●

The vehicle speed is less than about 6 

mph (10 km/h).

●

A shift position other than P is selected.

■

Setting the buzzer volume

The buzzer volume can be adjusted on the 

multi-information display. (



P.247)

■

Muting the buzzer sound

●

To mute the buzzer sound
The buzzer can be temporarily muted by 
pressing 

 of the meter control 

switches while an obstacle detection dis-
play is shown on the multi-information 
display.

●

To cancel the mute

Mute will be automatically canceled in 

the following situations.

• When the shift position is changed

• When the vehicle speed has reached or 

exceeded approximately 6 mph (10 

km/h) with the shift lever in D

• When the intuitive parking assist is turned 

off once and turned on again

• When the power switch is turned off once 

and turned to ON mode again

• When a sensor is malfunctioning

■

Intuitive parking assist display

When an obstacle is detected while the 

Lexus parking assist monitor is in use, the 

warning indicator will appear in the upper 

corner of the screen even if the display set-

ting has been set to off.

■

If “Parking Assist Unavailable” or “Park-

ing Assist Unavailable Clean Parking 

Assist Sensor” is displayed on the multi-

information display

A sensor may be dirty or covered with snow 

or ice. In such cases, if it is removed from 

the sensor, the system should return to nor-

mal.

Also, due to the sensor being frozen at low 

temperatures, a malfunction display may 

appear or an obstacle may not be detected. 

If the sensor thaws out, the system should 

return to normal.

■

If “Parking Assist Malfunction Visit Your 

Dealer” is displayed on the multi-infor-

mation display

Depending on the malfunction of the sen-

sor, the device may not be working nor-

mally. Have the vehicle inspected by your 

250

4-5. Using the driving support systems

Lexus dealer.

■

Sensor detection information

●

The sensor’s detection areas are limited 

to the areas around the vehicle’s bumper.

●

Certain vehicle conditions and the sur-

rounding environment may affect the 

ability of a sensor to correctly detect an 

obstacle. Particular instances where this 

may occur are listed below.

• There is dirt, snow or ice on the sensor. 

(Wiping the sensors will resolve this 

problem.)

• The sensor is frozen. (Thawing the area 

will resolve this problem.)

In especially cold weather, if a sensor is 

frozen the screen may show an abnormal 

display, or obstacles may not be 

detected.

• The sensor is covered in any way.

• The vehicle is leaning considerably to one 

side.

• 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.

• The sensor is coated with a sheet of spray 

or heavy rain.

• The vehicle is equipped with a fender 

pole or wireless antenna.

• Towing eyelets are installed.

• The bumper or sensor receives a strong 

impact.

• A backlit license plate, license plate 

holder, etc., are installed.

• The vehicle is approaching a tall or 

curved curb.

• In harsh sunlight or intense cold weather.

• The area directly under the bumpers is 

not detected.

• If obstacles draw too close to the sensor.

• A non-genuine Lexus suspension (low-

ered suspension etc.) is installed.

• People may not be detected if they are 

wearing certain types of clothing.

In addition to the examples above, there are 
instances in which, because of their shape, 
signs and other objects may be judged by a 
sensor to be closer than they are.

●

The shape of the obstacle may prevent a 

sensor from detecting it. Pay particular 

attention to the following obstacles:

• Wires, fences, ropes, etc.

• Cotton, snow and other materials that 

absorb sound waves

• Sharply-angled objects

• Low obstacles

• Tall obstacles with upper sections pro-

jecting outwards in the direction of your 

vehicle

●

The following situations may occur 

during use.

• Depending on the shape of the obstacle 

and other factors, the detection distance 

may shorten, or detection may be impos-

sible.

• Obstacles may not be detected if they 

are too close to the sensor.

• There will be a short delay between 

obstacle detection and display. Even at 

slow speeds, there is a possibility that the 

obstacle will come within the sensor’s 

detection areas before the display is 

shown and the buzzer sounds.

• Thin posts or objects lower than the sen-

sor may not be detected when 

approached, even if they have been 

detected once.

• It might be difficult to hear beeps due to 

the volume of audio system or air flow 

noise of the air conditioning system.

■

Customization

Some functions can be customized. 

(Customizable features: 



P.443)

WARNING

■

When using the intuitive parking 

assist

Observe the following precautions.
Failure 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).

251

4-5. Using the driving support systems

4

Driving

■

Detection range of the sensors

Approximately 3.3 ft. (100 cm)

Approximately 4.9 ft. (150 cm)

Approximately 1.9 ft. (65 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.

■

Distance display

Sensors that detect an obstacle will illu-
minate continuously or blink. (As the 
distance to the object becomes less 
than 1.0 ft. (30 cm), the distance seg-
ments may blink.)

WARNING

●

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.

NOTICE

■

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, and a buzzer sounds 

when no obstacles are detected.

●

If the area around a sensor collides 

with something, or is subjected to 

strong impact.

●

If the bumper collides with something.

●

If the display shows continuously with-

out beeping, except when the buzzer 

mute switch has been turned on.

●

If a display error occurs, first check the 

sensor.

If the error occurs even if 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.

Sensor detection display, obsta-
cle distance

A
B
C