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LEXUS RX 450HL (2019 year). Instruction - part 22

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If the Intelligent Clearance Sonar function operates unnecessarily such as at a railroad

crossing
Even in the event that the Intelligent Clearance Sonar function operates unnecessarily,

such as at a railroad crossing, brake control will be canceled after approximately 2 sec-

onds, allowing you to proceed forward and leave the area, Brake control can also be

canceled by depressing the brake pedal. Depressing the accelerator pedal again will

allow you to proceed forward and leave the area.

■

Situations in which the Intelligent Clearance Sonar Brake function may not operate

properly
In some situations such as the following, this function may not operate properly.

●

Weather

• If a sensor is covered with ice, snow, dirt, etc. (when cleared, the system will return to

normal)

• If heavy rain or water strikes a sensor

• When driving in inclement weather such as fog, snow or a sandstorm

●

Vehicle surroundings
• When an object that cannot be detected is between the vehicle and a detected

object

• If an object such as a vehicle, motorcycle, bicycle or pedestrian cuts in front of the

vehicle or runs out from the side of the vehicle.

●

Other ultrasonic waves sources
• When vehicle horns, vehicle detectors, motorcycle engines, air brakes of large vehi-

cles, the clearance sonar of other vehicles or other devices which produce ultra-

sonic waves are near the vehicle

• If a sticker or an electronic component, such as a backlit license plate (especially flu-

orescent type), fog lights, a fender pole or wireless antenna is installed near a sensor

●

Changes in the vehicle posture
• If the vehicle is significantly tilted

• If the front of the vehicle is raised or lowered due to the carried load

• If the orientation of a sensor has been changed due to a collision or other impact

• When a sensor or the area around a sen-

sor is extremely hot or cold

• When strong winds are blowing

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If a 12-volt battery terminal has been disconnected and reconnected
The system needs to be initialized.
To initialize the system, drive the vehicle straight ahead for 5 seconds or more at a speed

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

■

If “ICS Unavailable” is displayed on the multi-information display and the ICS OFF indi-

cator is flashing

●

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 continues to be displayed even after cleaning the sensor, or is displayed

even though the sensor is clean, have the vehicle inspected by your Lexus dealer.

●

Initialization may not have been performed after a 12-volt battery terminal was discon-

nected and reconnected. Initialize the system. (

P. 353)

■

If “ICS Malfunction Visit Your Dealer” is displayed on the multi-information display and

the ICS OFF indicator is flashing
The system may be malfunctioning. Have the vehicle inspected by your Lexus dealer.

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WARNING

■

Limitations of the Intelligent Clearance Sonar 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 Intelligent Clearance Sonar system is designed to

provide support to lessen the severity of collisions. However, it may not operate in

some situations.

●

The Intelligent Clearance Sonar 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 immediately as brake control will be canceled after approxi-

mately 2 seconds.

■

To ensure the Intelligent Clearance Sonar system can operate properly
Observe the following precautions regarding the sensors (

P. 345). Failure to do so

may cause a sensor to not operate properly, and may cause an accident.

●

Do not modify, disassemble or paint the sensors.

●

Do not replace a sensor with a part other than a genuine part.

●

Do not subject a sensor or its surrounding area to a strong impact.

●

Do not damage the sensors, and always keep them clean.

Observe the following precautions regarding the radar sensors (

P. 322). Failure to

do so may cause a radar sensor to not operate properly, and may cause an accident.

●

Do not modify, disassemble or paint the sensors.

●

Do not replace a radar sensor with a part other than a genuine part.

●

Do not subject a radar sensor or its surrounding area to a strong impact.

●

Do not damage the radar sensors, and always keep the radar sensors and their sur-

rounding area on the bumper clean.

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Handling the suspension
Do not modify the suspension, as changes to the height or inclination of the vehicle may

prevent the sensors from detecting objects correctly or cause the system to not oper-

ate or operate unnecessarily.

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NOTICE

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To prevent the system from malfunctioning

●

If the area around a sensor is subjected to an impact, the system may not operate

properly due to the sensor being misaligned. Have the vehicle inspected by your

Lexus dealer.

●

When using a high pressure washer to wash the vehicle, do not spray the sensors

directly, as doing so may cause a sensor to malfunction.

●

When using steam to clean the vehicle, do not direct steam too close to the sensors

as doing so may cause a sensor to malfunction.

■

To prevent a radar sensor from malfunctioning

●

If the area around a radar sensor is subjected to an impact, the system may not oper-

ate properly due to a sensor malfunction. Have the vehicle inspected by your Lexus

dealer.

●

Observe the radar sensor handling precautions. (

P. 322)

■

To prevent unnecessary operation of the Intelligent Clearance Sonar system
In the following situations, disable the Intelligent Clearance Sonar system as the system

may operate even though there is no possibility of a collision.

●

When inspecting the vehicle using a chassis roller, chassis dynamo or free roller

●

When loading the vehicle onto a boat, truck or other transport vessel

●

If the suspension has been modified or tires of a size other than specified are installed

●

If the front of the vehicle is raised or lowered due to the carried load

●

If towing eyelets are installed

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If the Rear Cross Traffic Auto Brake function detects that a collision with an
approaching vehicle is possible, the hybrid system output will be restricted to
restrain any increase in vehicle speed. (Hybrid system output restriction control:
See A below.)
Additionally, if the accelerator pedal continues to be depressed, the brakes will
be applied automatically to reduce the vehicle speed. (Brake control: See B
below.)

Rear Cross Traffic Auto Brake function (if equipped)

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Off

Time

Down

Off

Time

Off

Time

Down

Accelerator pedal
Brake pedal
Hybrid system output
Braking force

Start of control
High possibility of a collision
Extremely high possibility of a colli-
sion

2
3
4

5
6
7

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The Rear Cross Traffic Auto Brake function will operate when
The function will operate when the ICS OFF indicator is not illuminated or flashing (

P.

345, 353) and all of the following conditions are met:

●

Hybrid system output restriction control
• The Intelligent Clearance Sonar with Rear Cross Traffic Auto Brake is enabled.

• The vehicle speed is 10 mph (15 km/h) or less.

• The shift lever is in R.

• The system determines that a stronger than normal brake operation is necessary to

avoid a collision with an approaching vehicle.

●

Brake control
• Hybrid system output restriction control is operating.

• The system determines that an emergency brake operation is necessary to avoid a

collision with an approaching vehicle.

■

The Rear Cross Traffic Auto Brake function will stop operating when
The function will stop operating if any of the following conditions are met:

●

Hybrid system output restriction control
• The Intelligent Clearance Sonar with Rear Cross Traffic Auto Brake is disabled.

• The collision becomes avoidable with normal brake operation.

• A vehicle is no longer approaching from the right or left at the rear of the vehicle.

●

Brake control
• The Intelligent Clearance Sonar with Rear Cross Traffic Auto Brake is disabled.

• Approximately 2 seconds elapse after the vehicle is stopped by brake control.

• The brake pedal is depressed after the vehicle is stopped by brake control.

• A vehicle is no longer approaching from the right or left at the rear of the vehicle.

■

Detection area of the Rear Cross Traffic Auto Brake function
The detection area of the Rear Cross Traffic Auto Brake function differs from the detec-

tion area of the RCTA function. (

P. 329)

Therefore, even if the RCTA function detects a vehicle and provides an alert, the Rear

Cross Traffic Auto Brake function may not start operating.

■

If the Rear Cross Traffic Auto Brake function has operated
If the vehicle is stopped due to operation of the Rear Cross Traffic Auto Brake function,

the Rear Cross Traffic Auto Brake function will be disabled and the ICS OFF indicator

will illuminate.

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Re-enabling the Rear Cross Traffic Auto Brake function
To re-enable the Rear Cross Traffic Auto Brake function when it is disabled during opera-

tion of the Rear Cross Traffic Auto Brake function, either enable the system again (

P.

345), or turn the power switch off and then back to ON mode.
Additionally, if there is no longer a vehicle approaching from the right or left at the rear 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.

■

Conditions under which the Rear Cross Traffic Auto Brake function will not detect a

vehicle
The Rear Cross Traffic Auto Brake 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

●

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.

■

RCTA function buzzer
Regardless of whether the RCTA function is enabled or not (

P. 321), if the Rear Cross

Traffic Auto Brake function is enabled and brake control is performed, a buzzer will

sound to notify the driver.

●

Vehicles that the sensors cannot detect due

to obstructions

●

Vehicles which suddenly accelerate or decel-

erate near your vehicle

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Situations in which the system may operate even though there is no possibility of a colli-

sion
In some situations such as the following, the Rear Cross Traffic Auto Brake function may

operate even though there is no possibility of a collision.

●

When the parking space faces a street and

vehicles are being driven on the street

●

When a detected vehicle turns while

approaching the vehicle

●

When a vehicle passes by the side of your

vehicle

●

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 there are spinning objects near

your vehicle such as the fan of an air condi-

tioning unit

• When water is splashed or sprayed toward

the rear bumper, such as from a sprinkler

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Situations in which the Rear Cross Traffic Auto Brake function may not operate prop-

erly
In some situations such as the following, this function may not operate properly.

●

Objects and vehicles which the radar sensors are not designed to detect
• Stationary objects

• Vehicles which are moving away from your vehicle

• Pedestrians, motorcycles, bicycles, etc.*

• Objects which are extremely close to a radar sensor

• Vehicles which are approaching from the right or left at the rear of the vehicle at a

traveling speed of less than approximately 5 mph (8 km/h)

• Vehicles which are approaching from the right or left at the rear of the vehicle at a

traveling speed of more than approximately 15 mph (24 km/h)

: Depending on conditions, detection of a vehicle and/or object may occur.

●

Situations in which the radar sensors may not be able to detect an object
• When a sensor or the area around a sensor is extremely hot or cold

• If the rear bumper is covered with ice, snow, dirt, etc.

• If heavy rain or water strikes the vehicle

• When the detection area of a radar sensor is obstructed by an adjacent vehicle

• If the vehicle is significantly tilted

• If towing eyelets are installed

• If the suspension has been modified or tires of a size other than specified are

installed

• If the front of the vehicle is raised or lowered due to the carried load

• If a sticker or an electronic component, such as a backlit license plate (especially flu-

orescent type), fog lights, a fender pole or wireless antenna is installed near a radar

sensor

• If the orientation of a radar sensor has been changed due to a collision or other

impact or removal and installation

• When multiple vehicles are approaching with only a small gap between each vehicle

• When a vehicle is approaching at high speed

●

Situations in which the radar sensor may not detect a vehicle
• When a vehicle approaches from the right

or left at the rear of the vehicle while you

are turning while backing up

• When turning while backing up

• When backing out of a shallow angle park-

ing spot

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Handling the radar sensors
P. 322

• Vehicles that the sensors cannot detect

due to obstructions

• When backing up on a slope with a sharp

change in grade

• When a vehicle turns into the detection

area

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The rear view image is displayed when
the shift lever is in R and the power
switch is in ON mode.

The parking assist monitor system will

be deactivated when the shift lever is in

any position other than R.

Lexus parking assist monitor



: If equipped

The parking assist monitor assists the driver by displaying an image of the view
behind the vehicle while backing up, for example while parking.
The screen illustrations used in this text are intended as examples, and may
differ from the image that is actually displayed on the screen.

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Screen display
The parking assist monitor screen will be displayed if the shift position is
shifted to R while the power switch is in ON mode.

Intuitive parking assist
Rear Cross Traffic Alert (if
equipped)

A simplified image is displayed on
the upper part of the screen when an
obstacle is detected.

■

Using the system
Use any of the following modes.

●

Estimated course line display mode (

P. 366)

Estimated course lines are dis-
played which move in accor-
dance with the operation of the
steering wheel.

Using the Lexus parking assist monitor

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Parking assist guide line display mode (

P. 368)

The steering wheel return points
(parking assist guide lines) are
displayed.

●

Distance guide line display mode
Distance guide lines only are dis-
played.

When the shift lever is in any position other than R, the display mode can be
changed in the following procedure.

Press the “MENU” button on the Lexus Display Audio controller/Remote
Touch, and then select

on the screen.

Select “Vehicle”, and then select “Backup Camera Guide Line Settings” on
the screen.
Select the desired display mode.

Estimated course line display
mode (

P. 366)

Parking assist guide line display
mode (

P. 368)

Distance guide line display mode
Distance guide lines only are dis-
played.

Switching the display mode

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Screen description

Vehicle center guide line

The line indicates the estimated vehicle center on the ground.

Vehicle width guide line

The line indicates a guide path when the vehicle is being backed straight up.

The displayed width is wider than the actual vehicle width.

The line aligns with the estimated course lines when the steering wheel is straight.

Estimated course lines

The lines show an estimated course when the steering wheel is turned.

Distance guide line

The line moves, together with the estimated course lines, in sync with the steering

wheel. The line shows points approximately 1.5 ft. (0.5 m) (red) and approximately

3 ft. (1 m) (yellow) from the center of the edge of the bumper.

Distance guide line

The line shows distance behind the vehicle, a point approximately 1.5 ft. (0.5 m)

(blue) from the edge of the bumper.

Estimated course line display mode

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Parking operation
When parking in a space which is in the reverse direction to the space
described in the procedure below, the steering directions will be reversed.

Shift the shift lever to R.
Turn the steering wheel so that
the estimated course lines are
within the parking space, and
back up slowly.

Parking space
Estimated course lines

When the rear position of the
vehicle has entered the parking
space, turn the steering wheel so
that the vehicle width guide lines
are within the left and right divid-
ing lines of the parking space.

Vehicle width guide line

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