LEXUS RX 350 L (2019 year). Manual - part 19

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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 paying careful attention to your surroundings.

●

The dynamic radar cruise control with full-speed range provides driving assistance to

reduce the driver's burden. 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. 311

• Conditions under which the vehicle-to-vehicle distance control mode may not

function correctly: 

P. 312

●

Set the speed appropriately depending on the speed limit, traffic flow, road condi-

tions, weather conditions, etc. The driver is responsible for checking the set speed.

●

Even when the system is functioning normally, the condition of the preceding 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 on this system or assuming the system ensures safety while

driving can lead to an accident, resulting in death or serious injury.

●

Switch the dynamic radar cruise control with full-speed range 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 following 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 vehicle and a

designated vehicle traveling ahead. It is not a mechanism that allows careless or inat-

tentive driving, and it is not a system that can assist the driver in low-visibility condi-

tions. It is still necessary 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 fol-

lowing 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 vigilant and to determine

whether or not there is a possibility of danger in any given situation.

●

Assisting the driver to operate the vehicle

The dynamic radar cruise control with full-speed range has limited capability to pre-

vent or avoid a collision with a vehicle traveling ahead. Therefore, if there is ever any

danger, the driver must take immediate and direct control of the vehicle and act

appropriately in order to ensure the safety of all involved.

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WARNING

■

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 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, cyclers, 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

●

When your vehicle is towing a trailer or 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.

When the vehicle ahead of you stops, your vehicle will also stop (vehicle is stopped by

system control). After the vehicle ahead starts off, pushing the cruise control lever up

or depressing the accelerator pedal will resume follow-up cruising.

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. 309)

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.
If the lever is operated while the vehicle speed is below approximately 30 mph (50

km/h) and a preceding vehicle is present, the set speed will be adjusted to approxi-

mately 30 mph (50 km/h).

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

(Except when the vehicle has been

stopped by system control in vehicle-to-

vehicle distance control mode)

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, Saipan and Puerto Rico

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

*

1

 or 1 km/h (0.6mph)

*

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. 309), 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”

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. When the vehicle is
stopped by system control, the vehicle stops at a certain vehicle-to-vehicle
distance depending on the situation.

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)

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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.

Pulling the lever toward you cancels
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.)

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

However, when a vehicle ahead is not detected, cruise control does not resume when

the vehicle speed is approximately 25 mph (40 km/h) or less.

Resuming follow-up cruising when the vehicle has been stopped by sys-
tem control (vehicle-to-vehicle distance control mode)

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 25 mph [40 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. 305

Canceling and resuming the speed setting: 

P. 307

Selecting constant speed control mode

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■

Dynamic radar cruise control with full-speed range can be set when

●

The shift lever is in the D or range 4 or higher of S has been selected. 

(vehicles without paddle shift switches)

●

The shift lever is in D. 

(vehicles with paddle shift switches)

●

Range 4 or higher of D has been selected by using the paddle shift switch. 

(vehicles with paddle shift switches)

●

Vehicle speed is at or above approximately 30 mph (50 km/h). However, when a pre-

ceding vehicle is detected, the dynamic radar cruise control with full-speed range can

be set even if the vehicle speed is below 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.

■

When the vehicle stops while follow-up cruising

●

Pushing the lever up while the vehicle ahead stops will resume follow-up cruising if the

vehicle ahead starts off within approximately 3 seconds after the switch is pressed.

●

If the vehicle ahead starts off within 3 seconds after your vehicle stops, follow-up cruis-

ing 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.

●

Actual vehicle speed falls below approximately 25 mph (40 km/h) when there are no

vehicles ahead.

●

The preceding vehicle leaves the lane when your vehicle is following at a vehicle speed

at or below approximately 25 mph (40 km/h). Otherwise, the sensor cannot properly

detect the vehicle. (“Radar Cruise Control Not Available No Preceding Vehicles” is

displayed on the multi-information display)

●

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 control:
• 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 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 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 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. 308) 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.)

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Motorcycles traveling in the same lane

●

When water or snow thrown up by the surrounding vehicles hinders the detecting of

the sensor

■

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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The Blind Spot Monitor is a system that has 2 functions:

●

The BSM (Blind Spot Monitor) function
Assists the driver in making a decision when changing lanes

●

The RCTA (Rear Cross Traffic Alert) function
Assists the driver when backing up

These functions use same sensors.

BSM (Blind Spot Monitor)





: If equipped

Summary of the Blind Spot Monitor

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Multi-information display

Turning the BSM function/RCTA function on/off. (

P. 315)

The RCTA function is available when the BSM function is on.

Outside rear view mirror indicators

BSM function: 

When a vehicle is detected in a blind spot of the outside rear view mirrors or

approaching rapidly from behind into a blind spot, the outside rear view mirror indi-

cator on the detected side will illuminate. If the turn signal lever is operated toward

the detected side, the outside rear view mirror indicator flashes.
RCTA function: 

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.

“BSM” indicator/“RCTA” indicator

When the BSM function/RCTA function is turned on, the indicator illuminates.

Monitor screen display (RCTA function only) (if equipped)

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

RCTA icon (

P. 322) for the detected side will be displayed on the monitor screen. 

This illustration shows an example of a vehicle approaching from the left at the rear of

the vehicle.

RCTA buzzer (RCTA function only)

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 BSM function is operated to turn the system on.

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Press “

” or “” of the meter control switches, select 

.

Press “

” or “” of the meter control switches, select “BSM”.

Press “

” or “” of the meter control switches, select “BSM” or “RCTA”.

■

Outside rear view mirror indicator visibility
In strong sunlight, the outside rear view mirror 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 there is a malfunction in the Blind Spot Monitor
If a system malfunction is detected due to any of the following, a warning message will be

displayed: (

P. 661)

●

A sensor is malfunctioning

●

A sensor is dirty or covered with snow or a sticker

●

The outside temperature is extremely high or low

●

Sensor voltage is abnormal

●

A sensor is misaligned

■

Certification for the Blind Spot Monitor



For vehicles sold in the U.S.A.



For vehicles sold in Canada

Turning the BSM function/RCTA function on/off

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■

Customization
Some functions can be customized. (

P. 325, 722)

WARNING

■

Handling the radar sensor
Blind Spot Monitor sensors are installed behind the left and right sides of the rear

bumper respectively. Observe the following to ensure the Blind Spot Monitor can

function correctly.

●

Do not subject a sensor or its surrounding area on the rear bumper to a strong

impact. 

If a sensor is moved even slightly off position, the system may malfunction and vehi-

cles may not be detected correctly. 

In the following situations, have your vehicle inspected by your Lexus dealer.
• A sensor or its surrounding area is subject to a strong impact.

• If the surrounding area of a sensor is scratched or dented, or part of them has

become disconnected.

●

Do not disassemble the sensor.

●

Do not attach stickers to the sensor or surrounding area on the rear bumper.

●

Do not modify the sensor or surrounding area on the rear bumper.

●

Do not paint the rear bumper any color other than an official Lexus color.

●

Keep the sensors and the surrounding areas

on the rear bumper clean at all times. 

If a sensor or its surrounding area on the rear

bumper is dirty or covered with snow, the

Blind Spot Monitor may not operate and a

warning message (

P. 661) will be displayed.

In this situation, clear off the dirt or snow and

drive the vehicle with the operation condi-

tions of the BSM function (

P. 319) satisfied

for approximately 10 minutes. If the warning

message does not disappear, have the vehicle

inspected by your Lexus dealer.