Lexus LC500 (2022 year). Manual in english — page 13

227

4

4-5. Using the driving support systems

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WARNING

O

Assisting the driver to judge proper

following distance

The dynamic radar cruise control with
full-speed range determines whether the
following 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 vigi-
lant and to determine whether or not
there is a possibility of danger in any
given situation.

O

Assisting the driver to operate the

vehicle

The dynamic radar cruise control with
full-speed range has limited 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 vehi-
cle and act appropriately in order to
ensure the safety of all involved.

Q

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 follow-

ing situations.
Doing so may result in inappropriate

speed control and could cause an acci-

dent resulting in death or serious injury.

O

Roads where there are pedestrians,

cyclists, etc.

O

In heavy traffic

O

On roads with sharp bends

O

On winding roads

O

On slippery roads, such as those cov-

ered with rain, ice or snow

O

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.

O

At entrances to freeways and high-

ways

O

When weather conditions are bad

enough that they may prevent the sen-

sors from detecting correctly (fog,

snow, sandstorm, heavy rain, etc.)

O

When there is rain, snow, etc. on the

front surface of the radar sensor or

front camera

O

In traffic conditions that require fre-

quent repeated acceleration and

deceleration

O

During emergency towing

O

When an approach warning buzzer is

heard often

228

4-5. Using the driving support systems

This mode employs a radar sensor to detect the presence of vehicles up to approx-
imately 100 m (328 ft.) 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.

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 distance
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 decelerates
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 sys-
tem control). After the vehicle ahead starts off, pressing the “+RES” switch 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 constant

Driving in vehicle-to-vehicle distance control mode

A

B

C

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4-5. Using the driving support systems

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speed cruising.

1

Press the cruise control main
switch to activate the cruise con-
trol.

Radar cruise control indicator will come on

and a message will be displayed on the

multi-information display.
Press the switch again to deactivate the

cruise control.
If the cruise control main switch is pressed

and held for 1.5 seconds or more, the sys-

tem turns on in constant speed control

mode. (



P.232)

2

Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (at or above
approximately 50 km/h [30 mph])
and press the “-SET” switch to set
the speed.

Cruise control “SET” indicator will come

on.
The vehicle speed at the moment the

switch is released becomes the set speed.
If the switch is operated while the vehicle

speed is below approximately 50 km/h

(30 mph) and a preceding vehicle is pres-

ent, the set speed will be adjusted to

approximately 50 km/h (30 mph).

To change the set speed, operate the
“+RES” or “-SET” switch until the
desired set speed is displayed.

1

Increases the speed
(Except when the vehicle has been
stopped by system control in vehi-
cle-to-vehicle distance control
mode)

2

Decreases the speed

Fine adjustment: Press the switch.
Large adjustment: Press and hold the
switch to change the speed, and release
when the desired speed is reached.

In the vehicle-to-vehicle distance con-
trol mode, the set speed will be
increased or decreased as follows:

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

Adjusting the set speed

230

4-5. Using the driving support systems



For Europe

Fine adjustment: By 5 km/h (3.1 mph)

*1

or

5 mph (8 km/h)

*2

each time the switch is

pressed
Large adjustment: Increases or decreases
in 5 km/h (3.1 mph)

*1

or 5 mph (8 km/h)

*2

increments for as long as the switch is held



Except for Europe

Fine adjustment: By 1 km/h (0.6 mph)

*1

or 1

mph (1.6 km/h)

*2

each time the switch is

pressed
Large adjustment: Increases or decreases
in 5 km/h (3.1 mph)

*1

or 5 mph (8 km/h)

*2

increments for as long as the switch is held

In the constant speed control mode
(



P.232), the set speed will be

increased or decreased as follows:

Fine adjustment: By 1 km/h (0.6 mph)

*1

or 1

mph (1.6 km/h)

*2

each time the switch is

pressed
Large adjustment: The speed will continue
to change while the switch is held.

*1

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

*2

: When the set speed is shown in “MPH”

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

1

Long

2

Medium

3

Short

The vehicle-to-vehicle distance is set auto-
matically to long mode when the engine
switch <power switch> is turned to IGNI-
TION ON mode <ON mode>.
If a vehicle is running ahead of you, the pre-
ceding vehicle mark

will also be dis-

played.

Select a distance from the table below.
Note that the distances shown corre-
spond to a vehicle speed of 80 km/h
(50 mph). 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 dis-
tance control mode)

Vehicle-to-vehicle distance set-
tings (vehicle-to-vehicle dis-
tance control mode)

A

231

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After the vehicle ahead of you starts
off, press the “+RES” switch.
Your vehicle will also resume follow-
up cruising if the accelerator pedal is
depressed after the vehicle ahead of
you starts off.

1

Pressing the cancel switch 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.)

2

Pressing the “+RES” switch
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
40 km/h (25 mph) or less.

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 appropri-

Distance options

Vehicle-to-vehicle

distance

Long

Approximately 50

m (160 ft.)

Medium

Approximately 40

m (130 ft.)

Short

Approximately 30

m (100 ft.)

Resuming follow-up cruising
when the vehicle has been
stopped by system control (vehi-
cle-to-vehicle distance control
mode)

Canceling and resuming the
speed control

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

232

4-5. Using the driving support systems

ate vehicle-to-vehicle distance.

Q

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 trav-
eling at an extremely slow speed



Immediately after the cruise control
speed was set



When depressing the accelerator
pedal

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

1

With the cruise control off, press
and hold the cruise control main
switch for 1.5 seconds or more.

Immediately after the switch is pressed, the

radar cruise control indicator will come on.

Afterwards, it switches to the cruise con-

trol indicator.
Switching to constant speed control mode

is only possible when operating the switch

with the cruise control off.

2

Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (at or above
approximately 40 km/h [25 mph])
and press the “-SET” switch to set
the speed.

Cruise control “SET” indicator will come

on.
The vehicle speed at the moment the

switch is released becomes the set speed.
Adjusting the speed setting:



P.229

Canceling and resuming the speed setting:



P.231

Q

Dynamic radar cruise control with full-

speed range can be set when

O

The shift position is in D.

Selecting constant speed con-
trol mode

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4-5. Using the driving support systems

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O

LC500: Range 4 or higher of D has

been selected by using the paddle shift

switch.

O

Vehicle speed is at or above approxi-

mately 50 km/h (30 mph).

However, when a preceding vehicle is

detected, the dynamic radar cruise con-

trol with full-speed range can be set even

if the vehicle speed is below approxi-

mately 50 km/h (30 mph).

Q

Accelerating after setting the vehicle

speed

The vehicle can accelerate by operating the

accelerator pedal. After accelerating, the

set speed resumes. However, during vehi-

cle-to-vehicle distance control mode, the

vehicle speed may decrease below the set

speed in order to maintain the distance to

the preceding vehicle.

Q

When the vehicle stops while follow-up

cruising

O

Pressing the “+RES” switch 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.

O

If the vehicle ahead starts off within 3 sec-

onds after your vehicle stops, follow-up

cruising will be resumed.

Q

Automatic cancelation of vehicle-to-

vehicle distance control mode

Vehicle-to-vehicle distance control mode is

automatically canceled in the following situ-

ations:

O

Actual vehicle speed falls at or below

approximately 40 km/h (25 mph) when

there are no vehicles ahead.

O

The preceding vehicle leaves the lane

when your vehicle is following at a vehicle

speed at or below approximately 40

km/h (25 mph). Otherwise, the sensor

can not properly detect the vehicle.

(“CRUISE NOT AVAILABLE No Pre-

ceding Vehicles” is displayed on the

multi-information display)

O

VSC is activated.

O

TRC is activated for a period of time.

O

When the VSC or TRC system is turned

off.

O

When snow mode is set.

O

The sensor cannot detect correctly

because it is covered in some way.

O

Pre-collision braking is activated.

O

The parking brake is operated.

O

The vehicle is stopped by system control

on a steep incline.

O

The following are detected when the

vehicle has been stopped by system con-

trol:

• 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 sys-
tem. Contact any authorized Lexus retailer
or Lexus authorized repairer, or any reli-
able repairer.

Q

Automatic cancelation of constant

speed control mode

Constant speed control mode is automati-

cally canceled in the following situations:

O

Actual vehicle speed is more than

approximately 16 km/h (10 mph) below

the set vehicle speed.

O

Actual vehicle speed falls below approxi-

mately 40 km/h (25 mph).

O

VSC is activated.

O

TRC is activated for a period of time.

O

When the VSC or TRC system is turned

off.

O

Pre-collision braking is activated.

If constant speed control mode is automati-
cally canceled for any other reason, there
may be a malfunction in the system. Con-
tact any authorized Lexus retailer or Lexus
authorized repairer, or any reliable
repairer.

234

4-5. Using the driving support systems

Q

Brake system operation sound

If the brakes are applied automatically while

the vehicle is in vehicle-to-vehicle distance

control mode, a brake system operation

sound may be heard. This does not indicate

a malfunction.

Q

If “Radar Cruise Control Unavailable” is

shown on the multi-information display

The radar cruise control system cannot be

used temporarily. Use the system when it

becomes available again.

Q

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 driv-

ing. If a warning message is shown on the

multi-information display, read the message

and follow the instructions.

Q

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 insuffi-

cient 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.231) may not be activated.

O

Vehicles that cut in suddenly

O

Vehicles traveling at low speeds

O

Vehicles that are not moving in the same

lane

O

Vehicles with small rear ends (trailers

with no load on board, etc.)

O

Motorcycles traveling in the same lane

O

When water or snow thrown up by the

surrounding vehicles hinders the detect-

ing of the sensor

O

When your vehicle is pointing upwards

(caused by a heavy load in the luggage

compartment, etc.)

O

Preceding vehicle has an extremely high

ground clearance

Q

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 nec-

essary.
As the sensor may not be able to correctly

detect vehicles ahead, the system may not

operate properly.

O

When the road curves or when the lanes

are narrow

O

When steering wheel operation or your

position in the lane is unstable

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O

When the vehicle ahead of you deceler-

ates suddenly

O

When driving on a road surrounded by a

structure, such as in a tunnel or on a

bridge

O

While the vehicle speed is decreasing to

the set speed after the vehicle acceler-

ates by depressing the accelerator pedal

*

: If equipped

Q

Meter display

Set speed

Indicators

Q

Operation switches

“+RES” switch

Cruise control main switch

“-SET” switch

Cruise control

*

Use the cruise control to maintain a
set speed without depressing the
accelerator pedal.
Use the cruise control on freeways
and highways.

System components

A
B

A
B
C

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4-5. Using the driving support systems

Cancel switch

1

Press the cruise control main
switch to activate the cruise con-
trol.

Cruise control indicator will come on.

Press the switch again to deactivate the

cruise control.

2

Accelerate or decelerate the vehi-
cle to the desired speed, and press
the “-SET” switch to set the speed.

Cruise control “SET” indicator will come

on.

The vehicle speed at the moment the

switch is released becomes the set speed.

To change the set speed, operate the
“+RES” or “-SET” switch until the
desired set speed is obtained.

1

Increases the speed

2

Decreases the speed

Fine adjustment: Press the switch in the
desired direction.
Large adjustment: Press and hold switch.
The set speed will be increased or
decreased as follows:
Fine adjustment: By approximately 1 km/h
(0.6 mph) each time the switch is pressed.
Large adjustment: The set speed can be
increased or decreased continually until
the switch is released.

1

Pressing the cancel switch cancels
the constant speed control.

The speed setting is also canceled when
the brakes are applied.

2

Pressing the “+RES” switch
resumes the constant speed con-

Setting the vehicle speed

Adjusting the set speed

D

Canceling and resuming the
constant speed control

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4-5. Using the driving support systems

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trol.

Resuming is available when the vehicle
speed is more than approximately 40
km/h (25 mph).

Q

Cruise control can be set when

O

The shift position is in D.

O

Vehicle speed is above approximately

40 km/h (25 mph).

Q

Accelerating after setting the vehicle

speed

O

The vehicle can be accelerated normally.

After acceleration, the set speed

resumes.

O

Even without canceling the cruise con-

trol, the set speed can be increased by

first accelerating the vehicle to the

desired speed and then pressing the -

/SET switch to set the new speed.

Q

Automatic cruise control cancelation

Cruise control will stop maintaining the

vehicle speed in any of the following situa-

tions.

O

Actual vehicle speed falls more than

approximately 16 km/h (10 mph) below

the preset vehicle speed.

O

Actual vehicle speed is below approxi-

mately 40 km/h (25 mph).

O

VSC is activated.

O

TRC is activated for a period of time.

O

When the VSC or TRC system is turned

off.

Q

If the warning message for the cruise

control is shown on the multi-informa-

tion display

Press the cruise control main switch once to

deactivate the system, and then press the

switch again to reactivate the system.

If the cruise control speed cannot be set or

if the cruise control cancels immediately

after being activated, there may be a mal-

function in the cruise control system. Have

the vehicle inspected by any authorized

Lexus retailer or Lexus authorized repairer,

or any reliable repairer.

WARNING

Q

To avoid operating the cruise control

by mistake

Switch the cruise control off using the

cruise control main switch when not in

use.

Q

Situations unsuitable for cruise con-

trol

Do not use cruise control in any of the

following situations.

Doing so may result in loss of control and

could cause an accident resulting in

death or serious injury.

O

In heavy traffic

O

On roads with sharp bends

O

On winding roads

O

On slippery roads, such as those cov-

ered with rain, ice or snow

O

On steep downhills

Vehicle speed may exceed the set

speed when driving down a steep hill.

O

During emergency towing

238

4-5. Using the driving support systems

1

Normal mode/Custom mode

Normal mode and custom mode are
selected by pressing the driving mode
select switch. Each time the switch is
pressed, the driving mode changes
between normal mode and custom mode.
When custom mode is selected, the “Cus-
tom” indicator comes on.
Press the switch to change the driving
mode to normal mode when not in normal
mode.
• Normal mode
Provides an optimal balance of fuel econ-
omy, quietness, and dynamic performance.
Suitable for city driving.
When the shift position is in D, an appropri-

ate gear for sporty driving may automati-
cally be selected according to driver
performance and driving conditions.
• Custom mode
Allows you to drive with the power train,
chassis and air conditioning system func-
tions set to your preferred settings.
Custom mode settings can only be
changed on the drive mode customization
display of Center Display. (



P.275)

2

Comfort mode

By controlling the suspension, riding com-
fort is further enhanced. Suitable for city
driving.
When not in comfort mode and the driving
mode select switch is turned forward, the
“Comfort” indicator comes on.

3

Eco drive mode

Helps the driver accelerate in an eco-
friendly manner and improve fuel economy
through moderate throttle characteristics
and by controlling the operation of the air
conditioning system (heating/cooling).
When in comfort mode, if the driving mode
select switch is turned forward, the “Eco”
indicator comes on.

4

Sport mode

• SPORT S mode
Controls the transmission and engine to
provide quick, powerful acceleration. This
mode is suitable for when agile driving
response is desired, such as when driving
on roads with many curves.
When not in SPORT S mode, if the driving
mode select switch is turned backward, the
“Sport S” indicator comes on.
• SPORT S+ mode
Provides earlier downshift timing than
SPORT S mode in order to maintain a high
engine speed and provides faster gear
changes. This mode also changes the

Driving mode select switch

The driving modes can be selected
to suit driving condition.

Selecting the driving mode

239

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4-5. Using the driving support systems

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steering feel, suspension control and
VDIM control, making it suitable for pow-
erful sporty driving.
When in SPORT S mode, if the driving
mode select switch is turned backward, the
“Sport S+” indicator comes on.

Q

Operation of the air conditioning sys-

tem in Eco drive mode

Eco drive mode controls the heating/cool-

ing operations and fan speed of the air con-

ditioning system to enhance fuel efficiency.

To improve air conditioning performance,

perform the following operations:

O

Turn off eco air conditioning mode (if

equipped) (



P.283)

O

Adjust the fan speed (



P.281, 283)

O

Turn off Eco drive mode

Q

Automatic deactivation of sport mode

and custom mode

If the engine switch <power switch> is

turned off after driving in sport mode or

custom mode, the drive mode will be

changed to normal mode.

Q

Driving mode pop-up display

When the driving mode is changed, the

selected driving mode will be temporarily

displayed on the side display. (



P.277)

For custom mode, select “Setting” on the

display to customize the driving mode.

Q

Types of sensors

Front corner sensors

Front center sensors

Rear corner sensors

Rear center sensors

Q

Display

When the sensors detect an obstacle, a
graphic is shown on the multi-informa-
tion display, head-up display and Cen-
ter Display depending on the position
and distance to the obstacle.



Multi-information display and head-

Lexus parking assist-sensor

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, head-up dis-
play (if equipped), Center Display
and a buzzer. Always check the sur-
rounding area when using this sys-
tem.

System components

A
B
C
D

240

4-5. Using the driving support systems

up display

Front corner sensor detection

Front center sensor detection

Rear corner sensor detection

Rear center sensor detection



Center Display

A graphic is shown when the Lexus park-
ing assist monitor is displayed (insert dis-
play)
A simplified image is displayed on the
upper right corner of Center Display when
an obstacle is detected.

1

Press

or

of the meter con-

trol switches, and select

.

2

Press

or

of the meter con-

trol switches, and select “Parking
Assist”, and press “OK”.

When the Lexus parking assist-sensor
is turned on, the Lexus parking assist-
sensor indicator comes on to inform
the driver that the system is opera-
tional.

Q

The Lexus parking assist-sensor can be

operated when

O

Front center sensors:

• The engine switch <power switch> is in

IGNITION ON mode <ON mode>.

• The shift position is in a position other

than P or R.

• The vehicle speed is less than about 10

km/h (6 mph).

O

Front corner sensors:

• The engine switch <power switch> is in

IGNITION ON mode <ON mode>.

• The shift position is in a position other

than P.

• The vehicle speed is less than about 10

km/h (6 mph).

(At any speed when the shift position is in

R)

O

Rear corner and rear center sensors:

• The engine switch <power switch> is in

IGNITION ON mode <ON mode>.

• The shift position is in R.

Q

Muting the buzzer sound

O

To mute the buzzer sound:

The buzzer can be temporarily muted by

pressing “OK” of the meter control

switches while an obstacle detection dis-

play is shown on the multi-information dis-

play.

O

To cancel the mute:

Mute will be automatically canceled in the

following situations.

• When the shift position is changed

(except shifting from D to N, or N to D)

• When the vehicle speed has reached or

exceeded 10 km/h (6 mph) with the shift

Turning Lexus parking assist-
sensor on/off

A
B
C
D

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4-5. Using the driving support systems

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position in D

• When the Lexus parking assist-sensor is

turned off once and turned on again

• When the engine switch <power switch>

is turned off once and turned to IGNI-

TION ON mode <ON mode> again

Q

If “Clean Parking Assist Sensor” is dis-

played on the multi-information display

A sensor may be dirty or covered with snow

or ice. In such cases, if it is removed from

the sensor, the system should return to nor-

mal.
Also, due to the sensor being frozen at low

temperatures, a malfunction display may

appear or an obstacle may not be detected.

If the sensor thaws out, the system should

return to normal.

Q

If “Parking Assist Malfunction” or

“Parking Assist Malfunction Visit Your

Dealer” is displayed on the multi-infor-

mation display

There is a malfunction and the device may

not be working properly.
Have the vehicle inspected by any autho-

rized Lexus retailer or Lexus authorized

repairer, or any reliable repairer.

Q

Sensor detection information

O

The sensor’s detection areas are limited

to the areas around the vehicle’s front

and rear bumpers.

O

The following situations may occur

during use.

• Depending on the shape of the object

and other factors, the detection distance

may shorten, or detection may be impos-

sible.

• Detection may be impossible if static

objects draw too close to the sensor.

• There will be a short delay between static

object detection and display (warning

buzzer sounds). Even at low speeds,

there is a possibility that the object will

come within 30 cm (1.0 ft.) before the

display is shown and the warning buzzer

sounds.

• It might be difficult to hear the buzzer due

to the volume of the audio system or air

flow noise of the air conditioning system.

• It may be difficult to hear the sound of this

system due to the buzzers of other sys-

tems.

Q

Objects which the system may not prop-

erly detect

The shape of the object may prevent the

sensor from detecting it. Pay particular

attention to the following objects:

O

Wires, fences, ropes, etc.

O

Cotton, snow and other materials that

absorb sound waves

O

Sharply-angled objects

O

Low objects

O

Tall objects with upper sections project-

ing outwards in the direction of your vehi-

cle

Q

Situations in which the system may not

operate properly

Certain vehicle conditions and the sur-

rounding environment may affect the ability

of a sensor to correctly detect objects. Par-

ticular instances where this may occur are

listed below.

O

There is dirt, snow, water drops or ice on

a sensor. (Cleaning the sensors will

resolve this problem.)

O

A sensor is frozen. (Thawing the area will

resolve this problem.) In especially cold

weather, if a sensor is frozen the sensor

display may be displayed abnormally, or

objects, such as a wall, may not be

detected.

O

When a sensor or the area around a sen-

sor is extremely hot or cold.

O

On an extremely bumpy road, on an

incline, on gravel, or on grass.

O

When vehicle horns, vehicle detectors,

motorcycle engines, air brakes of large

vehicles, the clearance sonar of other

242

4-5. Using the driving support systems

vehicles or other devices which produce

ultrasonic waves are near the vehicle.

O

A sensor is coated with a sheet of spray

or heavy rain.

O

If objects draw too close to the sensor.

O

When a pedestrian is wearing clothing

that does not reflect ultrasonic waves (ex.

skirts with gathers or frills).

O

When objects that are not perpendicular

to the ground, not perpendicular to the

vehicle traveling direction, uneven, or

waving are in the detection range.

O

Strong wind is blowing.

O

When driving in inclement weather such

as fog, snow or a sandstorm.

O

When an object that cannot be detected

is between the vehicle and a detected

object.

O

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.

O

If the orientation of a sensor has been

changed due to a collision or other

impact.

O

When equipment that may obstruct a

sensor is installed, such as a towing eye-

let, bumper protector (an additional trim

strip, etc.), bicycle carrier, or snow plow.

O

If the front of the vehicle is raised or low-

ered due to the carried load.

O

If the vehicle cannot be driven in a stable

manner, such as when the vehicle has

been in an accident or is malfunctioning.

O

When tire chains, a compact spare tire or

an emergency tire puncture repair kit are

used.

Q

Situations in which the system may

operate even if there is no possibility of a

collision

In some situations, such as the following, the

system may operate even though there is

no possibility of a collision.

O

When driving on a narrow road.

O

When driving toward a banner, flag, low-

hanging branch or boom barrier (such as

those used at railroad crossings, toll

gates and parking lots).

O

When there is a rut or hole in the surface

of the road.

O

When driving on a metal cover (grating),

such as those used for drainage ditches.

O

When driving up or down a steep slope.

O

If a sensor is hit by a large amount of

water, such as when driving on a flooded

road.

O

There is dirt, snow, water drops or ice on

a sensor. (Cleaning the sensors will

resolve this problem.)

O

A sensor is coated with a sheet of spray

or heavy rain.

O

When driving in inclement weather such

as fog, snow or a sandstorm.

O

When strong winds are blowing.

O

When vehicle horns, vehicle detectors,

motorcycle engines, air brakes of large

vehicles, the clearance sonar of other

vehicles or other devices which produce

ultrasonic waves are near the vehicle.

O

If the front of the vehicle is raised or low-

ered due to the carried load.

O

If the orientation of a sensor has been

changed due to a collision or other

impact.