2019 LEXUS RX450H RCTA

3284-5. Using the driving support systems
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■RCTA icon display
When a vehicle approaching from the right or left at the rear of the vehicle is
detected, the following will be displayed on the audio system screen.
DisplayContent
A vehicle is approaching from the left at the rear of the vehicle
A vehicle is approaching from the right at the rear of the vehicle
Vehicles are approaching from both sides of the vehicle
The RCTA function is malfunctioning
( P. 321)
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 supplementary function which alerts the driver that a vehi-
cle is approaching from the right or left at the rear of the vehicle. As the RCTA function
may not function correctly under certain cond itions, the driver’s own visual confirma-
tion of safety is necessary. Over reliance on this function may lead to an accident
resulting death or serious injury.

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The areas that vehicles can be detected in are outlined below.
The buzzer can alert the driver of faster vehicles approaching from farther away.
Example:
■The RCTA function is operational when
The RCTA function operates when all of the following conditions are met:
●The RCTA function is on.
●The shift lever is in R.
●The vehicle speed is less than approximately 5 mph (8 km/h).
●The approaching vehicle speed is between approximately 5 mph (8 km/h) and 18 mph
(28 km/h).
RCTA function detection areas
Approaching vehicleSpeedApproximate
alert distance
Fast18 mph (28 km/h)65 ft. (20 m)
Slow5 mph (8 km/h)18 ft. (5.5 m)
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3304-5. Using the driving support systems
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■Conditions under which the RCTA fu nction 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 parkin g space next to your vehicle
●Guardrails, walls, signs, parked vehi cles 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 function may not function correctly
●The RCTA function may not detect vehicles correctly in the following situations:
• When the sensor is misaligned due to a stro ng impact to the sensor or its surround-
ing area
• When mud, snow, ice, a sticke r, etc. is covering the sensor or surrounding area on
the rear bumper
• When driving on a road surf ace that is wet with standing water during bad weather,
such as heavy rain, snow, or fog
• When multiple vehicles are approaching wi th only a small gap between each vehicle
• When a vehicle is approaching at high speed
• When towing a trailer (vehicles with towing package)
●Vehicles that the sensors cannot detect due to
obstructions
• When backing up on a slope with a sharp change in grade

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RX450h_RX450hL_U• Immediately after the RCTA function is turned on
• Immediately after the hybrid system is started with the RCTA function on
●Instances of the RCTA function unnecessari
ly detecting a vehicle and/or object may
increase in the following situations:
• When a vehicle passes by th e side of your vehicle
• When the distance between your vehicle and metal objects, such as a guardrail,
wall, sign, or parked vehicle, which may re flect electrical waves toward the rear of
the vehicle, is short
You can change the BSM function/RCTA function settings.
Press the “MENU” button on the Remote Touch, and then select on the
screen.
Select “Vehicle”, and then select “Blind Spot Monito r Settings” on the screen.
Select the desired setting. ( P. 745)
• When backing out of a shallow angle park-
ing spot
• When the sensors cannot detect a vehicle due to obstructions
• When the parking space faces a street and vehicles are being driven on the street
Setting up BSM function/RCTA function
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3584-5. Using the driving support systems
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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 fo llowing conditions are met:
●Hybrid system output restriction control
• The Intelligent Clearance Son ar 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 restri ction control is operating.
• The system determines that an emergenc y 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 an y 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 th e 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 detect s 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 ap proaching 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 backin g 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 parkin g space next to your vehicle
●Guardrails, walls, signs, parked vehi cles 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

7459-2. Customization
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Vehicle specifications
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■Intuitive parking assist (P. 332)
*: When intuitive parking assist is operating.
■BSM (Blind Spot Monitor) ( P. 319)
FunctionDefault settingCustomized setting
Detection distance of the front
center sensorFarNearOO
Detection distance of the rear
center sensorFarNearOO
Buzzer volume31 to 5OO
Display setting*All sensors dis-
playedDisplay offOO
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FunctionDefault settingCustomized setting
Outside rear view mirror indica-
tor brightnessBrightDimOO
Alert timing for presence of
approaching vehicle (BSM func-
tion only)
Intermediate
Early
OOLate
Only when in blind spot
RCTA buzzer volumeLevel 2Level 1O—Level 3
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