LEXUS RC F (2019 year). Instruction

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4-5. Using the driving support systems

RC F_U

WARNING

■

Situations unsuitable for dynamic radar cruise control
Do not use dynamic radar cruise control in any of the following situations.

Doing so may result in inappropriate speed control and could cause an accident result-

ing 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 covered 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 sensors 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 sen-

sor

●

In traffic conditions that require frequent repeated acceleration and deceleration

●

During emergency towing

●

When an approach warning buzzer is heard often

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This mode employs a radar sensor to detect the presence of vehicles up to
approximately 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 dis-

tance 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 deceler-

ates 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.

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 con-

stant speed cruising.

Driving in vehicle-to-vehicle distance control mode

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Press the “ON/OFF” button to acti-
vate the cruise control.

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. 276)

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.

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

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

Increases the speed
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)

or 1 km/h (0.6 mph)

each time the lever is

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

or 1 km/h (0.6 mph)

increments for as long as the lever is held



For Canada, Guam and Puerto Rico
Fine adjustment: By 1 mph (1.6 km/h)

or 1 km/h (0.6 mph)

each time the lever is

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

or 5 km/h (3.1 mph)

increments for as long as the lever is held

In the constant speed control mode (

P. 276), the set speed will be increased or

decreased as follows:

Fine adjustment: By 1 mph (1.6 km/h)

or 1.6 km/h (1 mph)

each time the lever is

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

: When the set speed is shown in “MPH”

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

Adjusting the set speed

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

Long
Medium
Short

The vehicle-to-vehicle distance is set

automatically to long mode when the

engine switch is turned to IGNITION

ON mode.
If a vehicle is running ahead of you, the preceding vehicle mark will also be displayed.

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.

Pulling the lever toward you cancels
the speed control.

The speed control is also canceled when

the brake pedal is depressed.

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

However, cruise control does not

resume when the vehicle speed is

approximately 25 mph (40 km/h) or

less.

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

Preceding
vehicle mark

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Vehicle-to-vehicle distance settings (vehicle-to-vehicle distance con-
trol 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)

Canceling and resuming the speed control

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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 vehicle-
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 traveling at an extremely slow speed

●

Immediately after the cruise control speed was set

●

When depressing the accelerator pedal

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

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When constant speed control mode is selected, your vehicle will maintain a set
speed without controlling the vehicle-to-vehicle distance. Select this mode only
when vehicle-to-vehicle distance control mode does not function correctly due
to a dirty radar sensor, etc.

With the cruise control off, press and
hold the “ON/OFF” button for 1.5
seconds or more.

Immediately after the “ON/OFF” but-

ton is pressed, the 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.

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. 273

Canceling and resuming the speed setting:

P. 274

Selecting constant speed control mode

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Dynamic radar cruise control 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 approximately 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 vehicle-to-vehicle distance control mode, the vehi-

cle speed may decrease below the set speed in order to maintain the distance to the pre-

ceding vehicle.

■

Automatic cancelation of vehicle-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).

●

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.

If vehicle-to-vehicle distance control mode is automatically canceled for any other rea-

son, there may be a malfunction in the system. Contact your Lexus dealer.

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Automatic cancelation of constant speed control mode
Constant speed control mode is automatically canceled in the following situations:

●

Actual vehicle speed is more than approximately 10 mph (16 km/h) below the set vehi-

cle speed.

●

Actual vehicle speed falls below approximately 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 automatically canceled for any other reason, there may

be a malfunction in the system. Contact your Lexus dealer.

■

Warning messages and buzzers for dynamic radar cruise control
Warning messages and buzzers are used to indicate a system malfunction or to inform

the driver of the need for caution while driving. If a warning message is shown on the

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 insufficient 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. 275) 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 detecting of

the sensor

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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 necessary.

As the sensor may not be able to correctly detect vehicles ahead, the system may not

operate properly.

●

When the vehicle ahead of you decelerates suddenly

●

When your vehicle is pointing upwards

(caused by a heavy load in the luggage com-

partment, etc.)

●

Preceding vehicle has an extremely high

ground clearance

●

When the road curves or when the lanes are

narrow

●

When steering wheel operation or your posi-

tion in the lane is unstable

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Types of sensors



RC350/RC300



RC F

Intuitive parking assist



: If equipped

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.

Front center sensors
Front corner sensors

Rear corner sensors
Rear center sensors

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When the sensors detect an obstacle, a graphic is shown on the multi-
information display and Center Display depending on the position and distance
to the obstacle.

■

Multi-information display

■

Center Display
A graphic is shown when the Lexus
parking assist monitor is displayed
(insert display).
A simplified image is displayed on
the upper right corner of the screen
when an obstacle is detected.

Display



RC350/RC300



RC F

Front corner sensor detection
Front center sensor detection

Rear corner sensor detection
Rear center sensor detection

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Multi-information display and Center Display
Sensors that detect an obstacle will illuminate continuously or blink.



RC350/RC300

Sensor detection display, obstacle distance

Multi-

information

display

Insert display

(Center Dis-

play)

Approximate distance to obstacle

Corner sensor/

front center sensor

Rear center sensor

(continuous)

(blinking slowly)

Front center sensor

only:

3.3 ft. (100 cm) to 1.6 ft.

(50 cm)

4.9 ft. (150 cm) to 2.0

ft. (60 cm)

(continuous)

(blinking)

1.6 ft. (50 cm) to 1.3 ft.

(40 cm)

2.0 ft. (60 cm) to 1.5 ft.

(45 cm)

(continuous)

(blinking rapidly)

1.3 ft. (40 cm) to 1.0 ft.

(30 cm)

1.5 ft. (45 cm) to 1.1 ft.

(35 cm)

(blinking)

(continuous)

Less than 1.0 ft. (30 cm) Less than 1.1 ft. (35 cm)

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

RC F

Multi-

information

display

Insert display

(Center Dis-

play)

Approximate distance to obstacle

Corner sensor

Rear center sensor

(continuous)

(blinking slowly)



4.9 ft. (150 cm) to 2.0

ft. (60 cm)

(continuous)

(blinking)

Front corner sensor:

1.6 ft. (50 cm) to 1.3 ft.

(40 cm)

Rear corner sensor:

2.0 ft. (60 cm) to 1.5 ft.

(45 cm)

2.0 ft. (60 cm) to 1.5 ft.

(45 cm)

(continuous)

(blinking rapidly)

Front corner sensor:

1.3 ft. (40 cm) to 1.0 ft.

(30 cm)

Rear corner sensor:

1.5 ft. (45 cm) to 1.0 ft.

(30 cm)

1.5 ft. (45 cm) to 1.1 ft.

(35 cm)

(blinking)

(continuous)

Less than 1.0 ft. (30 cm) Less than 1.1 ft. (35 cm)

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Buzzer operation and distance to an obstacle
A buzzer sounds when the sensors are operating.

●

The buzzer beeps faster as the vehicle approaches an obstacle. When the
vehicle comes within the following distance of the obstacle, the buzzer
sounds continuously:

• Front center sensors (RC350/RC300): Approximately 1.0 ft. (30 cm)
• Corner sensors: Approximately 1.0 ft. (30 cm)
• Rear center sensors: Approximately 1.1 ft. (35 cm)

●

When 2 or more obstacles are detected simultaneously, the buzzer system
responds to the nearest obstacle. If one or both come within the above dis-
tances, the beep will repeat a long tone, followed by fast beeps.

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.

Detection range of the sensors



RC350/RC300



RC F

Approximately 3.3 ft. (100 cm)
Approximately 4.9 ft. (150 cm)

Approximately 1.6 ft. (50 cm)
Approximately 2.0 ft. (60 cm)

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LEXUS RC F (2019 year). Instruction - part 17