LEXUS GX 460 (2019 year). Manual - part 15

232

Dynamic radar cruise control



Dynamic radar cruise control supplements conventional cruise control with a
vehicle-to-vehicle distance control. In vehicle-to-vehicle distance control mode,
the vehicle automatically accelerates or decelerates in order to maintain a set
following distance from vehicles ahead.

Display
Set speed
Indicators
Vehicle-to-vehicle distance button
Cruise control switch

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

Dynamic radar cruise control indicator

will come on.
Press the button again to deactivate the

cruise control.



: If equipped

Summary of functions

2
3
4
5

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

233

4-5. Using the driving support systems

iving

Accelerate or decelerate the vehicle
to the desired speed, and push the
lever down to set the speed.

“SET” indicator will come on.
The vehicle speed at the moment the

lever is released becomes the set speed.

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 in the

desired direction.

In the vehicle-to-vehicle distance control mode, the set speed will be increased or

decreased as follows:

• When the set speed is shown in “MPH”

Fine adjustment: By approximately 1 mph (1.6 km/h) each time the lever is oper-

ated
Large adjustment: By approximately 5 mph (8 km/h) for each 0.75 seconds the

lever is held

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

Fine adjustment: By approximately 0.6 mph (1 km/h) each time the lever is oper-

ated
Large adjustment: By approximately 3.1 mph (5 km/h) for each 0.75 seconds the

lever is held

In the constant speed control mode (

P. 237), the set speed will be increased or

decreased as follows:
Fine adjustment: By approximately 1 mph (1.6 km/h) each time the lever is operated
Large adjustment: The set speed can be increased or decreased continually until the

lever is released.

Adjusting the set speed

234

4-5. Using the driving support systems

Pressing the button 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 be also 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.

Changing the vehicle-to-vehicle distance

Preceding vehicle mark

2
3

Vehicle-to-vehicle distance settings

Distance options

Vehicle-to-vehicle distance

Long

Approximately 160 ft. (50 m)

Medium

Approximately 130 ft. (40 m)

Short

Approximately 100 ft. (30 m)

235

4-5. Using the driving support systems

iving

Pulling the lever toward you cancels
the cruise control.

The speed setting is also canceled when

the brakes are applied.

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

Resuming is available when the vehicle

speed is more than approximately 25

mph (40 km/h).

This mode employs a radar sensor to detect the presence of vehicles up to
approximately 400 ft. (120 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 long downhill

slopes.

Canceling and resuming the speed control

Driving in vehicle-to-vehicle distance control mode

236

4-5. Using the driving support systems

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 control.

Example of deceleration cruising
When the vehicle ahead is driving slower than the set speed

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. A warning tone warns you when the system cannot decelerate suf-

ficiently to prevent your vehicle from closing in on the vehicle ahead.

Example of follow-up cruising
When following a vehicle driving slower than the set speed

The system continues follow-up cruising while adjusting for changes in the speed of

the vehicle ahead in order to maintain the vehicle-to-vehicle distance set by the driver.

Example of acceleration
When there are no longer any vehicles ahead driving slower than the set
speed

The system accelerates until the set speed is reached. The system then returns to con-

stant speed cruising.

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. Apply the brakes to ensure
an appropriate vehicle-to-vehicle distance.

■

Warnings may not occur when
In the following instances, there is a possibility that the warnings will not occur:

●

When the speed of the vehicle ahead matches or exceeds your vehicle
speed

●

When the vehicle ahead is traveling at an extremely slow speed

●

Immediately after the cruise control speed was set

●

As the instant the accelerator is applied

Approach warning

237

4-5. Using the driving support systems

iving

Constant speed control mode differs from vehicle-to-vehicle distance control
mode. When constant speed control mode is selected, your vehicle will maintain
a set speed regardless of whether or not there are other vehicles in the lane
ahead.

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

Press the button again to deactivate the

cruise control.

Switch to constant speed control
mode. (Push the lever forward and
hold for approximately 1 second.)

Constant speed control mode indicator

will come on.
When in constant speed control mode, to return to vehicle-to-vehicle distance con-

trol mode, push the lever forward again and hold for approximately 1 second.
After the desired speed has been set, it is not possible to return to vehicle-to-vehicle

distance control mode.
If the engine switch is turned off and then turned to IGNITION ON mode again, the

vehicle will automatically return to vehicle-to-vehicle distance control mode.
Adjusting the speed setting:

P. 233

Canceling and resuming the speed setting:

P. 235

Selecting conventional constant speed control mode

238

4-5. Using the driving support systems

■

Dynamic radar cruise control can be set when

●

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

●

Vehicle speed is above approximately 30 mph (50 km/h).

■

Switching modes
The mode cannot be switched to constant speed control mode if vehicle-to-vehicle dis-

tance control mode has been used. The mode also cannot be switched from constant

speed control to vehicle-to-vehicle distance control mode. Turn the system off by press-

ing the “ON-OFF” button, and turn it on again.

■

Accelerating after setting the vehicle speed
The vehicle can accelerate normally. After acceleration, the set speed resumes. How-

ever, during vehicle-to-vehicle distance control mode, the vehicle speed may decrease

below the set speed in order to maintain the distance to the vehicle ahead.

■

Automatic cancelation of vehicle-to-vehicle distance control
Vehicle-to-vehicle distance control driving is automatically canceled in the following situ-

ations:

●

Actual vehicle speed falls below approximately 25 mph (40 km/h).

●

VSC is activated.

●

The sensor cannot operate correctly because it is covered in some way.

●

The windshield wipers are operating at high speed (when the wiper switch is set to the

“AUTO” mode or the high speed wiper operation position).

●

When second start mode is set.

●

Bad weather causes the detection function to become extremely unstable.

●

Multi-terrain mode is selected other than OFF.

●

The center differential lock/unlock is not completed within 5 seconds while the

dynamic radar cruise control system is on.

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

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

■

Automatic cancelation of constant speed control
The cruise control will stop maintaining the vehicle speed in the following situations:

●

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

cle speed.

At this time, the memorized set speed is not retained.

●

Actual vehicle speed falls below approximately 25 mph (40 km/h).

●

VSC is activated.

●

The center differential lock/unlock is not completed within 5 seconds while the

dynamic radar cruise control system is on.

239

4-5. Using the driving support systems

iving

■

Radar sensor and grille cover
Always keep the sensor and grille cover clean to ensure that the vehicle-to-vehicle dis-

tance control operates properly. (Some obstructions, such as snow, ice or plastic objects,

cannot be detected by the obstruction sensor.)

Dynamic radar cruise control is canceled if an obstruction is detected.

■

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. (

P. 529)

■

Certification



For vehicles sold in the U.S.A., Hawaii, Guam, Saipan and Puerto Rico



For vehicles sold in Canada

Grille cover
Radar sensor

240

4-5. Using the driving support systems

CAUTION

■

Before using dynamic radar cruise control
Do not overly rely on vehicle-to-vehicle distance control.

Be aware of the set speed. If automatic deceleration/acceleration is not appropriate,

adjust the vehicle speed, as well as the distance between your vehicle and vehicles

ahead by applying the brakes etc.

■

Cautions regarding the driving assist systems
Observe the following precautions.

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 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 inattentive driving, and it

is not a system that can assist the driver in low-visibility conditions. 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 determines whether the following distance

between the driver’s own vehicle and a designated vehicle traveling ahead is appro-

priate or not. 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 has no capability to prevent 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.

241

4-5. Using the driving support systems

iving

CAUTION

■

To avoid inadvertent cruise control activation
Switch the cruise control off using the “ON-OFF” button when not in use.

■

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.

●

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 expressways

●

When weather conditions are bad enough that they may prevent the sensors from

functioning correctly (fog, snow, sandstorm, heavy rain, etc.)

●

When an approach warning buzzer is heard often

●

When your vehicle is towing a trailer (with towing hitch) or during emergency towing

■

When the sensor may not be correctly detecting the vehicle ahead
Apply the brakes as necessary when any of the following types of vehicles are in front of

you.

As the sensor may not be able to correctly detect these types of vehicles, the approach

warning (

P. 236) will not be activated, and a fatal or serious accident may result.

●

Vehicles that cut in suddenly

●

Vehicles traveling at low speeds

●

Vehicles that are not moving

●

Vehicles with small rear ends (trailers with no load on board etc.)

●

Motorcycles traveling in the same lane

242

4-5. Using the driving support systems

CAUTION

■

Conditions under which the vehicle-to-vehicle distance control may not function cor-

rectly
Apply the brakes as necessary in the following conditions as the radar sensor may not

be able to correctly detect vehicles ahead, and a fatal or serious accident may result:

●

When water or snow thrown up by the surrounding vehicles hinders the functioning

of the sensor

●

When your vehicle is pointing upwards (caused by a heavy load in the luggage com-

partment etc.)

●

When the road curves or when the lanes are narrow

●

When steering wheel operation or your position in the lane is unstable

●

When the vehicle ahead of you decelerates suddenly

■

To ensure the sensor functions correctly
Do not do the following to the sensor or grille as doing so may cause the sensor not to

function correctly and could result in an accident:

●

Sticking or attaching anything to them

●

Leaving them dirty

●

Disassembling or subjecting them to strong shocks

●

Modifying or painting them

●

Replacing them with non-genuine parts

■

Handling the radar sensor
Observe the following to ensure the cruise control system can function effectively.

Otherwise, the system may not function correctly and could result in an accident.

●

Keep the sensor and grille cover clean at all times.

Clean the sensor and grille cover with a soft cloth so you do not mark or damage

them.

●

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

If the sensor moves even slightly off position, the system may malfunction. If the sen-

sor or surrounding area is subject to a strong impact, always have the area inspected

and adjusted by your Lexus dealer.

●

Do not disassemble the sensor.

●

Do not attach accessories or stickers to the sensor, grille cover or surrounding area.

●

Do not modify or paint the sensor and grille cover.

●

If the sensor needs to be replaced, contact your Lexus dealer.

243

4-5. Using the driving support systems

iving

LDA (Lane Departure Alert)



While driving on a road that has lane markers, this system recognizes the white
lane markers using a camera as a sensor to alert the driver when the vehicle
deviates from its lane.
If the system judges that the vehicle may deviate from its lane, it alerts the driver
using beeping and indications on the multi-information display.
Camera sensor

Press the “LDA” switch to activate the
system.

“LDA” indicator and the lane lines will

come on.
Press the switch again to turn the LDA

system off.



: If equipped

Summary of function

Turning the LDA system on

244

4-5. Using the driving support systems

●

When the vehicle speed is approximately 30 mph (48 km/h) or more

●

When the lane width is between approximately 9.8 and 13.1 ft. (3 and 4 m)

●

When driving on a straight road or through a curve with a radius of more than
approximately 656 ft. (200 m)

When the LDA system is on, the lane lines are shown.
When thin lines are shown:
Lane markers are not recognized by
the system, or the LDA system is tem-
porarily canceled.

When solid lane lines are shown:
The LDA system is active.

If the vehicle deviates from the lane, the

lane line will flash.

Operating conditions

Indication on the multi-information display

245

4-5. Using the driving support systems

iving

■

Temporary cancelation of the LDA system
If any of the following occurs, the LDA system will be temporarily canceled. The functions

will resume after the necessary operating conditions have returned.

●

The turn signal lever is operated.

●

The brake pedal is depressed.

●

The vehicle speed deviates from the operating range of the LDA system.

●

The lane lines cannot be recognized while driving.

●

The wiper operates continuously.

●

When the lane departure warning function is activated.

Once the lane departure warning function is activated, it will be temporarily canceled

and resume a few seconds later.

■

The lane departure warning
Depending on the audio system sound level or air conditioning fan noise while the audio

system or air conditioning system is in use, it may be difficult to hear the warning sound.

■

After the vehicle has been parked in the sun
The LDA system may not be available and a warning message (

P. 529) will be dis-

played for a while after driving has started. When the temperature in the cabin decreases

and the temperature around the camera sensor (

P. 243) becomes suitable for its

operation, the functions will begin to operate.

246

4-5. Using the driving support systems

■

Conditions in which the function may not operate correctly
In the following conditions, the camera sensor may be unable to recognize lane markers

causing the lane departure warning function to operate incorrectly. However, this does

not indicate a malfunction.

●

When driving through an area with no lane markers, such as a tollbooth, a crossing or

before a ticket checkpoint

●

When driving on a sharp curve

●

When lane markers are extremely narrow or extremely wide

●

When the vehicle leans to one side an unusual amount due to a heavy load or improper

tire inflation pressure

●

When the following distance between your vehicle and the vehicle ahead is extremely

short

●

When the lane markers are yellow (These may be more difficult for the system to rec-

ognize compared to white markers.)

●

When the lane markers are broken, “Botts’ dots”, “Raised pavement marker” or stones

●

When the lane markers are on a curb etc.

●

When lane markers are obscured or partially obscured by sand, dirt, etc.

●

When there are shadows on the road running parallel with lane markers, or if a shadow

covers the lane markers

●

When driving on a particularly bright road surface, such as concrete

●

When driving on a road surface that is bright due to reflected light

●

When driving in a location where the light level changes rapidly, such as the entrance to

or exit from a tunnel

●

When sunlight or the headlights of oncoming vehicles are shining directly into the cam-

era lens

●

When driving on roads that are branching or merging

●

When driving on a road surface that is wet due to rain, previous rainfall, standing water,

etc.

●

When the vehicle experiences strong up-and-down motion such as when driving on an

extremely rough road or on a seam in the pavement

●

When headlight brightness at nighttime is reduced due to dirt on the lenses, or when

the headlights are misaligned

●

When driving on winding roads or roads that are uneven

●

When driving on rough or unpaved roads

■

When changing the tires
Depending on the tires used, such as snow tire, etc., sufficient performance may not be

maintainable.

■

Warning messages and buzzers for LDA system
Warning messages and buzzers are used to indicate a system malfunction or to inform

the driver of the need for caution while driving. (

P. 529, 530 )

247

4-5. Using the driving support systems

iving

CAUTION

■

Before using the LDA system
Do not rely solely on the LDA system. The LDA system does not drive the vehicle auto-

matically, nor does it reduce the amount of care you need to take. As such, the driver

must always assume full responsibility for understanding his/her surroundings, for

operating the steering wheel to correct the driving line, and for driving safely.

Inappropriate or negligent driving could lead to an accident.

■

To avoid operating the LDA by mistake
Switch the LDA system off using the “LDA” switch when not in use.

■

Situations unsuitable for LDA system
Do not use LDA system in any of the following situations.

Otherwise, the system may not function correctly and could result in an accident.

●

When driving with tire chains, a spare tire, or similar equipment

●

When driving with non-standard parts or aftermarket equipment installed (including

modified tires and suspensions, etc.).

●

When there are objects or structures along the roadside that might be misinterpreted

as lane markers (such as guardrails, curb, reflector posts, etc.)

●

When driving on snowy roads

●

When pavement lane markers are difficult to see due to rain, snow, fog, sand, dirt, etc.

●

When there are visible lines on the pavement from road repairs, or if the remains of

old lane markers are still visible on the road

●

When driving in a lane other than the driving or passing lanes on a freeway or high-

way.

●

When driving on a road with lane closures due to maintenance, or when driving in a

temporary lane

Content .. 13 14 15 16 ..