LEXUS LS 500H (2019 year). Instruction - part 17

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●

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.

■

Certification



For vehicles sold in the U.S.A.



For vehicles sold in Canada

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■

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 objects that are extremely close to 
the vehicle.
The range of the sensors may change 
depending on the shape of the object, etc.

■

Multi-information display, head-up display (if equipped) and Center Display

When an object is detected by a sensor, the approximate distance to the object will 
be displayed on the multi-information display, Center Display, and head-up display 
(if equipped). (As the distance to the object becomes short, the distance segments 
may blink.) 

 Approximate distance to object: 4.9 ft. (150 cm) to 1.9 ft. (65 cm)

* 

(Rear center 

sensor)

*

: Automatic buzzer mute function is enabled. (

P.270)

 Approximate distance to object: 3.3 ft. (100 cm) to 1.9 ft. (65 cm)

*

 (Front center 

sensor)

Sensor detection display, object 
distance

A
B
C

Multi-information display

Center Display

Head-up display

Multi-information display

Center Display

Head-up display

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*

: Automatic buzzer mute function is enabled. (

P.270)

 Approximate distance to object: 1.9 ft. (65 cm) to 1.5 ft. (45 cm)

*

*

: Automatic buzzer mute function is enabled. (

P.270)

 Approximate distance to object: 1.5 ft. (45 cm) to 1.0 ft. (30 cm)

*

*

: Automatic buzzer mute function is enabled. (

P.270)

 Approximate distance to object: 1.0 ft. (30 cm) to 0.5 ft. (15 cm)

*1

*1

: Automatic buzzer mute function is disabled. (

P.270)

*2

: The distance segments will blink slowly.

 Approximate distance to object: Less than 0.5 ft. (15 cm)

*1

*1

: Automatic buzzer mute function is disabled. (

P.270)

*2

: The distance segments will blink rapidly.

■

Buzzer operation and distance to 
an object

A buzzer sounds when the sensors are 
operating.

Multi-information display

Center Display

Head-up display

Multi-information display

Center Display

Head-up display

Multi-information display

*2

Center Display

*2

Head-up display

Multi-information display

*2

Center Display

*2

Head-up display

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 The buzzer beeps faster as the vehi-

cle approaches an object. When the 
vehicle comes within the following 
distance of the object, the buzzer 
sounds continuously:

Approximately 1.0 ft. (30 cm)

 When 2 or more objects are 

detected simultaneously, the buzzer 
sounds for the nearest object. If one 
or more objects come within 
approximately 1.0 ft. (30 cm) of the 
vehicle, the buzzer will repeat a long 
tone, followed by fast beeps.

 Automatic buzzer mute function: 

After a buzzer begins sounding, if 
the distance between the vehicle 
and the detected object does not 
become shorter, the buzzer will be 
muted automatically. (However, if 
the distance between the vehicle 
and object is 1.0 ft. (30 cm) or less, 
this function will not operate.)

The buzzer sounds volume can be 
adjusted. (

P.264)

Meter control switches

Turning the RCTA function on/off.
When the RCTA function is disabled, the 
RCTA OFF indicator illuminates.

Outside rear view mirror indicators

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

RCTA (Rear Cross Traffic 
Alert) function

The RCTA function uses the BSM 
rear side radar sensors installed 
behind the rear bumper. This func-
tion is intended to assist the driver 
in checking areas that are not easily 
visible when backing up.

System components

A

B

C

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

P.273) 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

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 RCTA function is turned on.

Use the meter control switches to 
enable/disable the RCTA function. 
(

P.91)

1

Press 

 or 

 to select 

.

2

Press 

 or 

 to select “PKSA” 

and then press 

.

3

Press 

 or 

 to select “RCTA” 

and then press 

.

When the RCTA function is disabled, the 

RCTA OFF indicator (

P.76) illuminates. 

(Each time the power switch is turned off 

then changed to ON mode, the RCTA 

function will be enabled automatically.)

■

Outside rear view mirror indicator visi-

bility

In strong sunlight, the outside rear view mir-

ror indicator may be difficult to see.

■

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 “RCTA Not Available” is shown 

on the multi-information display

Water, snow, mud, etc., may be attached to 

the rear bumper around the sensors. 

(

P.260) Removing the water, snow, mud, 

etc., from the attached to the rear bumper 

around the sensors to normal.
Additionally, the function may not function 

normally when used in extremely hot or 

cold environments.

■

Rear side radar sensors

P.260

■

Operation of the RCTA function

The RCTA function uses rear side 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.

Turning the RCTA function 
on/off

D

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 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.

 RCTA function

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Approaching vehicles
Detection areas of approaching vehicles

■

RCTA icon display

When a vehicle approaching from the 
right or left at the rear of the vehicle is 
detected, the following will be dis-
played on the Center Display.
 Example (Lexus parking assist mon-

itor) (if equipped): Vehicles are 
approaching from both sides of the 
vehicle

■

RCTA function detection areas

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

The buzzer can alert the driver of 
faster vehicles approaching from far-
ther away.
Example:

A
B

Approaching vehi-

cle speed

 Approximate 

alert distance

18 mph (28 km/h) 

(fast)

65 ft. (20 m)

5 mph (8 km/h) 

(slow)

18 ft. (5.5 m)

A

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The RCTA function is operational when

The RCTA function operates when all of the 

following conditions are met:

●

The power switch is in ON mode.

●

The RCTA function is on.

●

The shift position is in R.

●

The vehicle speed is less than approxi-

mately 5 mph (8 km/h).

●

The approaching vehicle speed is 

between approximately 5 mph (8 km/h) 

and 18 mph (28 km/h).

■

Setting the buzzer volume

The buzzer volume can be adjusted on the 

multi-information display. (

P.264)

■

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 a 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 a sensor or its 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

• If a vehicle is approaching the rear of 

your vehicle rapidly 

• When a towing eyelet is installed to the 

rear of the vehicle.

• When backing up on a slope with a sharp 

change in grade

• When backing out of a shallow angle 

parking spot

• Immediately after the RCTA function is 

turned on

• Immediately after the hybrid system is 

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started with the RCTA function 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

• When a towing eyelet is installed to the 

rear of the vehicle

*

: If equipped

Pedestrian detection icon

Displayed automatically when a pedestrian 
is detected.

RCD OFF icon

When the RCD function is disabled, the 
RCD OFF icon illuminates. (Each time the 
power switch is turned off then changed to 
ON mode, the RCD function will be 
enabled automatically.)

Use the meter control switches to 
enable/disable the RCD function. 
(

P.91)

1

Press 

 or 

 to select 

.

RCD (Rear Camera Detec-
tion) function

*

When the vehicle is backing up, the 
rear camera detection function can 
detect pedestrians in the detection 
area behind the vehicle. If a pedes-
trian is detected, a buzzer will 
sound and an icon will be displayed 
on the Center Display to inform the 
driver of the pedestrian.

Center Display

Turning the RCD function on/off

A

B

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2

Press 

 or 

 to select “PKSA” 

and then press 

.

3

Press 

 or 

 to select “RCD” 

and then press 

.

When the RCD function is disabled, the 

RCD OFF indicator (

P.76) illuminates.

If the rear camera detection function 
detects a pedestrian in the detection 
area, the buzzer and pedestrian detec-
tion will operate as follows:

If a pedestrian is detected in area 

Buzzer: Sounds repeatedly
Pedestrian detection icon: Blinks 3 
times and then stays on
If a pedestrian is detected in area 

Buzzer (When the vehicle is sta-
tionary): Sounds 3 times
Buzzer (When the vehicle is back-
ing up, when a pedestrian 
approaches the rear of the vehicle): 

Sounds repeatedly
Pedestrian detection icon: Blinks 3 
times and then stays on
If the system determines that your 
vehicle may collide with a pedes-
trian in area 
Buzzer: Sounds repeatedly
Pedestrian detection icon: Blinks 3 
times and then stays on

■

The rear camera detection function is 

operational when

●

The power switch is in ON mode.

●

RCD function is on.

●

The shift position is in R.

■

Setting the buzzer volume

The buzzer volume can be adjusted on the 

multi-information display. (

P.264)

■

If “Rear Camera Detection Unavailable 

Remove the Dirt of Rear Camera” is dis-

played on the multi-information display

A rear camera lens may be dirty or covered 

with snow or ice. In such cases, if it is 

removed from the rear camera lens, the sys-

tem should return to normal. (It may be nec-

essary to drive the vehicle for some time 

before the system returns to normal.)

■

If “Rear Camera Detection Unavail-

able” is displayed on the multi-informa-

tion display

●

If this message is displayed after the 

12-volt battery has been disconnected 

and reconnected, fully turn the steering 

wheel to the left and then the right on 

level ground.

●

If this message is displayed only when the 

R shift position is selected, the rear cam-

era lens may be dirty. Clean the rear 

camera lens.

■

Situations in which the system may not 

operate properly

●

Some pedestrians, such as the following, 

may not be detected by the rear camera 

detection function, preventing the func-

tion from operating properly:

When a pedestrian is detected

A

A

B

B

C

C

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• Pedestrians who are bending forward or 

squatting

• Pedestrians who are lying down

• Pedestrians who are running

• Pedestrians who suddenly enter the 

detection area

• People riding a bicycle, skateboard, or 

other light vehicle

• Pedestrians wearing oversized clothing 

such as a rain coat, long skirt, etc., making 

their silhouette obscure

• Pedestrians whose body is partially hid-

den by an object, such as a cart or 

umbrella

• Pedestrians which are obscured by dark-

ness, such as at night

●

In some situations, such as the following, 

pedestrians may not be detected by the 

rear camera detection function, prevent-

ing the function from operating properly:

• When backing up in inclement weather 

(rain, snow, fog, etc.)

• When the rear camera is obscured (dirt, 

snow, ice, etc. are attached) or scratched

• When a very bright light, such as the sun, 

or the headlights of another vehicle, 

shines directly into the rear camera

• When backing up in a place where the 

surrounding brightness changes sud-

denly, such as at the entrance or exit of a 

garage or underground parking lot

• When backing up in a dim environment 

such as during dusk or in an underground 

parking lot

●

Even though there are no pedestrians in 

the detection area, some objects, such as 

the following, may be detected, possibly 

causing the rear camera detection func-

tion to operate.

• Three dimensional objects, such as a 

pole, traffic cone, fence, or parked vehi-

cle

• Moving objects, such as a car or motor-

cycle

• Objects moving toward your vehicle 

when backing up, such as flags or pud-

dles (or airborne matter, such as smoke, 

steam, rain, or snow)

• Cobblestone or gravel roads, tram rails, 

road repairs, white lines, pedestrian 

crossings or fallen leaves on the road

• Metal covers (gratings), such as those 

used for drainage ditches

• Objects reflected in a puddle or on a wet 

road surface

• The roadside or bumps on the road 

• Shadows  on  the  road

●

In some situations, such as the following, 

the rear camera detection function may 

operate even though there are no pedes-

trians in the detection area.

• When backing up toward the roadside or 

a bump on the road

• If the vehicle is significantly tilted, such as 

when carrying a heavy load

• When backing up toward an 

incline/decline

• If the suspension has been modified or 

tires of a size other than specified are 

installed

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

ered due to the carried load

• If an electronic component, such as a 

backlit license plate or rear fog light, is 

installed near the rear camera

• If a bumper protector, such as an addi-

tional trim strip, is installed to the rear 

bumper

• If the orientation of the rear camera has 

been changed

• If a towing eyelet is installed to the rear of 

the vehicle

• When water is flowing over the rear cam-

era lens

• When the rear camera is obscured (dirt, 

snow, ice, etc. are attached) or scratched

• If there is a flashing light in the detection 

area, such as the emergency flashers of 

another vehicle

●

Situations in which the rear camera 

detection function may be difficult to 

notice

• If buzzer may be difficult to hear if the 

surrounding area is noisy, the volume of 

the audio system volume is high, the air 

conditioning system is being used, etc.

• If the temperature in the cabin is 

extremely high or low, the audio system 

screen may not operate correctly.

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*

: If  equipped

■

Parking Support Brake function 
(static objects) (if equipped)

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

P.284)

■

Parking Support Brake function 
(rear-crossing vehicles) (if 
equipped)

Rear radar sensors are used to detect 
approaching vehicles in the detection 
area behind the vehicle when backing 
up. (

P.290)

■

Parking Support Brake function 
(rear pedestrians) (if equipped)

A rear camera sensor is used to detect 
pedestrians in the detection area 
behind the vehicle when backing up. 
(

P.294)

PKSB (Parking Support 
Brake)

*

The Parking Support Brake 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 or pedestrian is 
high, a warning operates to urge 
the driver to take evasive action. If 
the system determines that the pos-
sibility of a collision with a detected 
object or pedestrian is extremely 
high, the brakes are automatically 
applied to help avoid the collision or 
help reduce the impact of the colli-
sion.

PKSB (Parking Support Brake) 
system

WARNING

■

Limitations of the Parking Support 

Brake system

Do not overly rely on the system, as 

doing so may lead to an accident.

●

The driver is solely responsible for safe 

driving. Always drive carefully, taking 

care to observe your surroundings. 

The Parking Support Brake system is 

designed to provide support to lessen 

the severity of collisions. However, it 

may not operate in some situations.

●

The Parking Support Brake system is 

not designed to stop the vehicle com-

pletely. Additionally, even if the system 

has stopped the vehicle, it is necessary 

to depress the brake pedal immedi-

ately as brake control will be canceled 

after approximately 2 seconds.

NOTICE

■

If “Parking Support Brake Unavail-

able” is displayed on the multi-infor-

mation display and the PKSB OFF 

indicator is flashing

If this message is displayed immediately 

after the power switch is changed to ON 

mode, operate the vehicle carefully, pay-

ing attention to your surroundings. It may 

be necessary to drive the vehicle for a 

certain amount of time before the system 

returns to normal. (If the system is not 

return to normal after driving for a while, 

clean the rear camera lens.)

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The Parking Support Brake can be 
enabled/disabled on the multi-informa-
tion display. All of the Parking Support 
Brake functions (static objects, 
rear-crossing vehicles, and rear pedes-
trians) are enabled/disabled simultane-
ously.
Use the meter control switches to 
enable/disable the parking support 
brake. (

P.91)

1

Press 

 or 

 to select 

.

2

Press 

 or 

 to select 

 

and then press 

.

When the Parking Support Brake is dis-

abled, the PKSB OFF indicator (

P.76) 

illuminates.
To re-enable the system when it was dis-
abled, select 

 on the multi-information 

display, select 

 and then On. If dis-

abled using this method, the system will not 

be re-enabled by turning the power switch 

off and then to ON mode.

If the hybrid system output restriction con-
trol or brake control operates, a buzzer will 
sound and a message will be displayed on 
the Center Display and multi-information 
display, to alert the driver. On vehicles with 
a head-up display, the head-up display will 
display the same message as the 
multi-information display.
Depending on the situation, hybrid system 
output restriction control will operate to 

either limit acceleration or restrict output 
as much as possible.

 Hybrid system output restriction 

control is operating (acceleration 
restriction)

Acceleration greater than a certain 
amount is restricted by the system.
Center Display (Panoramic view monitor): 
No warning displayed
Multi-information display: “Object 
Detected Acceleration Reduced”
PKSB OFF indicator: Not illuminated
Buzzer: Does not sound

 Hybrid system output restriction 

control is operating (output 
restricted as much as possible)

The system has determined that stron-
ger-than-normal brake operation is neces-
sary.
Center Display (Panoramic view monitor): 
“BRAKE!”
Multi-information display: “BRAKE!”
PKSB OFF indicator: Not illuminated
Buzzer: Short beep

 Brake control is operating

The system determined that emergency 
braking is necessary.
Center Display (Panoramic view monitor): 
“BRAKE!”
Multi-information display: “BRAKE!”
PKSB OFF indicator: Not illuminated
Buzzer: Short beep

 Vehicle stopped by system opera-

tion

The vehicle has been stopped by brake 
control operation.
Center Display (Panoramic view monitor): 

Enabling/Disabling the Parking 
Support Brake

Displays and buzzers for hybrid 
system output restriction con-
trol and brake control

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“Press Brake Pedal”
Multi-information display: “Switch to 
Brake” (If the accelerator pedal is not 
depressed, “Press Brake Pedal” will be dis-

played.)
PKSB OFF indicator: Illuminated
Buzzer: Short beep

If the Parking Support Brake determines that a collision with a detected object or 
pedestrian is possible, the hybrid system output will be restricted to restrain any 
increase in the vehicle speed. (Hybrid system output restriction control: See figure 
2.)
Additionally, if the accelerator pedal continues to be depressed, the brakes will be 
applied automatically to reduce the vehicle speed. (Brake control: See figure 3.)
 Figure 1 When the PKSB (Parking Support Brake) is disabled

Hybrid system output
Braking force
Time

 Figure 2 When hybrid system output restriction control operates

System overview

A
B
C

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Hybrid system output
Braking force
Time
Hybrid system output restriction control begins operating 
System determines that possibility of collision with detected object is high
Hybrid system output reduced
Example: Multi-information display:
“BRAKE!”

 Figure 3 When brake control operates

Hybrid system output
Braking force
Time

A
B
C
D

E
F

G

A
B
C

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4-5. Using the driving support systems

LS500h_OM_(U)_1809

Hybrid system output restriction control begins operating 
System determines that possibility of collision with detected object is high
Hybrid system output reduced
System determines that possibility of collision with detected object is extremely 
high
Brake control begins operating
Brake control strength increased
Example: Multi-information display:
“BRAKE!”
Example: Multi-information display: “Switch to Brake”

■

If the Parking Support Brake has oper-

ated

If the vehicle is stopped due to operation of 

the Parking Support Brake, the Parking 

Support Brake will be disabled and the 

PKSB OFF indicator will illuminate. If the 

Parking Support Brake operates unneces-

sarily, brake control can be canceled by 

depressing the brake pedal or waiting for 

approximately 2 seconds for it to automati-

cally be canceled. Then, the vehicle can be 

operated by depressing the accelerator 

pedal.

■

Re-enabling the Parking Support Brake

To re-enable the Parking Support Brake 

when it is disabled due to operation of the 

Parking Support Brake, either enable the 

system again (

P.279), or turn the power 

switch off and then back to ON mode. 

Additionally, if the object becomes no lon-

ger in the traveling direction of the vehicle 

or if the traveling direction of the vehicle 

changes (such as changing from moving 

forward to backing up, or from backing up 

to moving forward), the system will be 

re-enabled automatically.

■

If “Parking Support Brake Unavailable” 

is displayed on the multi-information 

display and the PKSB OFF indicator is 

flashing

If the vehicle is stopped due to operation of 

the Parking Support Brake, the Parking 

Support Brake will be disabled and the 

PKSB OFF indicator will illuminate.

●

A sensor may be covered with ice, snow, 

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

from the sensor to return the system to 

normal.

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.

●

If this message is displayed only when the 

R shift position is selected, the rear cam-

era lens may be dirty. Clean the camera 

lens. If this message is displayed in any 

forward shift position, a sensor on the 

front or rear bumper may be dirty. Clean 

the sensors and their surrounding area 

on the bumpers.

●

If this message continues to be displayed 

even after cleaning the sensor, or is dis-

played even though the sensor is clean, 

have the vehicle inspected by your Lexus 

dealer.

●

Initialization may not have been per-

formed after a 12-volt battery terminal 

was disconnected and reconnected. Ini-

tialize the system. (

P.282)

If this message continues to be displayed 

even after initialization, have the vehicle 

inspected by your Lexus dealer.

■

If a 12-volt battery terminal has been 

disconnected and reconnected

The system needs to be initialized. To initial-

ize the system, drive the vehicle straight 

ahead for 5 seconds or more at a speed of 

approximately 22 mph (35 km/h) or more. 

D

E
F

G

H

I

J

K

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Additionally, for vehicles with the Parking 

Support Brake function, turn the steering 

wheel fully to the left and right with the vehi-

cle stopped.