Lexus LS (2022 year). Manual in english

282

4-5. Using the driving support systems

stopped by the Stop & Start system. (To

enable stopping of the engine by the Stop

& Start system, drive the vehicle.)

• The brake pedal is pumped or strongly

depressed.

• The air conditioning system is being used.

• The battery is not sufficiently charged.

■

Stop & Start system operation when the

brake hold system is operating

●

If the engine is restarted automatically by

the Stop & Start system when the brake

hold system is operating, the brake hold

system will continue to apply the brakes.

●

If the operation conditions of the brake

hold system are no longer met (



P.182)

while the engine is stopped by the Stop &

Start system, the brake hold system will

stop operating.

At this time, the parking brake will be
applied automatically and the engine will
be restarted automatically.

■

Stop & Start system operation during a

controlled stop by the dynamic radar

cruise control with full-speed range (if

equipped)

If the engine is restarted automatically by

the Stop & Start system during a controlled

stop by the dynamic radar cruise control

with full-speed range, the controlled stop

will continue. (Resuming follow-up cruising

after a controlled stop:



P.271)

■

Hood

●

If the hood is opened while the engine is

stopped by the Stop & Start system, the

engine will stall and will not be able to be

restarted by the automatic engine start

function. In this case, restart the engine

using the normal engine starting proce-

dure. (



P.169)

●

Even if the hood is closed after the engine

is started with the hood open, the Stop &

Start system will not operate. Close the

hood, turn the engine switch off, wait 30

seconds or more, and then start the

engine.

■

When to use the Stop & Start system

●

When stopping the vehicle for a longer

period of time, turn the engine switch off

and stop the engine completely.

●

When the system does not operate, is

canceled, or is malfunctioning, warning

messages and a warning buzzer are used

to inform the driver. (



P.283)

●

If the engine switch is pressed when the

engine is stopped by the Stop & Start sys-

tem, the engine will stall and will not be

able to be restarted by the automatic

engine start function. In this case, restart

the engine using the normal engine start-

ing procedure. (



P.169)

●

When the engine is restarted by the Stop

& Start system, the power outlet may be

temporarily unusable, but this is not a

malfunction.

●

Installation and removal of electrical

components and wireless devices may

affect the Stop & Start system. Contact

any authorized Lexus retailer or Lexus

authorized repairer, or any reliable

repairer for details.

■

If the windshield is fogged up while the

engine is stopped by the Stop & Start

system

Turn the windshield defogger on. (The

engine will start due to the automatic

engine start function.):



P.341

If the windshield fogs up frequently, press

the Stop & Start cancel switch to disable the

system.

■

Air conditioning system operation while

the engine is stopped by the Stop &

Start system

●

If the air conditioning system is being

used in automatic mode, the fan speed

may be reduced or the fan may be

stopped while the engine is stopped by

the Stop & Start system in order to

reduce changes in the cabin tempera-

ture.

●

To ensure air conditioning system perfor-

mance when the vehicle is stopped, disa-

ble the Stop & Start system by pressing

the Stop & Start cancel switch.

283

4-5. Using the driving support systems

Driving

■

If an odor comes from the air condition-

ing system while the engine is stopped

by the Stop & Start system

Press the Stop & Start cancel switch to

deactivate the Stop & Start system.

■

Changing the idling stop time with the

air conditioning system on

The length of time the Stop & Start system

will operate when the air conditioning sys-

tem is on can be changed by performing

the following operation. (The length of time

the Stop & Start system will operate when

the air conditioning system is off cannot be

changed.)

●

Setting by pressing and holding the Stop

& Start cancel switch

Each time the Stop & Start cancel switch

is pressed and held for 3 seconds or

more, the system changes between

standard and extended. The system sta-

tus can be confirmed on the multi-infor-

mation display screen. (



P.84)

●

Settings using the multi-information dis-

play

(



P.84) or

(



P.82).

■

The Stop & Start system protection

function

●

When the volume of the audio system is

excessively high, sound output from the

audio system may suddenly be cut off in

order to reduce battery consumption. To

prevent the audio system from being cut

off, keep the volume of audio system at a

moderate level.

If the audio system has been cut off, turn

the engine switch off, wait for 3 seconds

or more and then turn it to ACCES-

SORY mode or IGNITION ON mode to

re-enable the audio system.

●

The audio system may not be activated if

the battery terminals are disconnected

and then reconnected. If this occurs, turn

the engine switch off and then repeat the

following operation twice to activate the

audio system normally.

• Turn the engine switch to IGNITION ON

mode and then to off.

■

Replacing the battery



P.456

■

Displaying the Stop & Start system sta-

tus



P.84

■

Multi-information display messages

If the following situations,

and a mes-

sage may be displayed on the multi-infor-

mation display.

●

When the engine cannot be stopped by

the Stop & Start system

“Depress Brake Firmly to Activate”

• The brake pedal is not depressed

enough.



If the brake pedal is depressed further,

the system will operate.

“For Climate Control”

• The air conditioning system is being used

when the ambient temperature is high or

low.



If the difference between the set tem-

perature and cabin temperature is small,
the system will be enabled.
• The windshield defogger is ON.

“Battery Charging”

• The battery charge amount may be low.



Engine stop is temporarily prohibited to

prioritize charging of the battery, but if the
engine is operated for a short while, engine
stop is allowed.
• A refresh charge may be occurring, such

as when the battery is undergoing a peri-

odic recharge, for a while after the bat-

tery terminals have been disconnected

and reconnected, for a while after the

battery has been replaced, etc.



After a refresh charge of approximately

5 to 60 minutes completes, the system can
be operated.
• Continuously displayed for a long term

284

4-5. Using the driving support systems



The battery may be deteriorated. Con-

tact any authorized Lexus retailer or Lexus
authorized repairer, or any reliable
repairer for details.

“In Preparation”

• The vehicle is being driven in a high alti-

tude area.

• The brake booster vacuum is low.



When the brake booster vacuum

reaches a predetermined level, the system
will be enabled.

“Steering Wheel Turned”

• The steering wheel was operated.

“Driver Seat Belt Unbuckled”

• The driver seat belt is not fastened.

“Stop & Start Unavailable”

• The Stop & Start system is temporarily

disabled.



Operate the engine for a short while.

• The engine may have been started with

the hood open.



Close the hood, turn the engine switch

off, wait for 30 seconds or more, and then
start the engine.

“System Temperature Low”

• The battery may be cold.



Operate the engine for a short while

allows the system to recover due to the
temperature increase in the trunk.

“System Temperature High”

• The battery may be extremely hot.



If the engine compartment is allowed to

cool sufficiently, the system recovers.

“Non-Dedicated Battery.”

• A non-dedicated battery for the Stop &

Start system may have been installed.



The Stop & Start system does not oper-

ate. Have the vehicle inspected by any
authorized Lexus retailer or Lexus autho-
rized repairer, or any reliable repairer.

●

When the engine automatically restarts

while stopped by the Stop & Start system

“For Climate Control”

• The air conditioning system has been

turned on or is being used.

• The windshield defogger has been

turned on.

“In Preparation”

• The brake pedal has been depressed fur-

ther or pumped.



The system will be enabled after the

engine runs and the brake booster vacuum
reaches a predetermined level.

“Battery Charging”

• The battery charge amount may be low.



The engine is restarted to prioritize bat-

tery charging. Operating the engine for a
short while allows the system to recover.

“Steering Wheel Turned”

• The steering wheel was operated.

“Driver Seat Belt Unbuckled”

• The driver seat belt has been unfastened.

■

Stop & Start system warning messages

If a system malfunction occurs, a warning

message will be displayed on the

multi-information display to inform the

driver of the need for caution. (



P.443)

■

If the Stop & Start cancel indicator con-

tinues to flash

The system may be malfunctioning. Have

the vehicle inspected by any authorized

Lexus retailer or Lexus authorized repairer,

or any reliable repairer.

285

4-5. Using the driving support systems

Driving

Press the Stop & Start cancel switch to
disable the Stop & Start system.

The Stop & Start cancel indicator will
come on.
Pressing the switch again will enable the
Stop & Start system and the Stop & Start
cancel indicator will turn off.

■

Automatic reactivation of the Stop &

Start system

Even if the Stop & Start system is disabled

by the Stop & Start cancel switch, it will be

automatically re-enabled once the engine

switch is turned off and then the engine is

started.

■

If the Stop & Start cancel switch is

pressed while the vehicle is stopped

●

When the engine is stopped by the Stop

& Start system, pressing the Stop & Start

cancel switch will restart the engine.

WARNING

■

When the Stop & Start system is

operating

●

Depress the brake pedal and apply the

parking brake when necessary while

the engine is stopped by the Stop &

Start system (while the Stop & Start

indicator is on). (Except when the

brake hold system is operating or

when the vehicle comes to a con-

trolled stop while driving with the

dynamic radar cruise control with

full-speed range in vehicle-to-vehicle

distance control mode)

●

Do not allow anyone to leave the vehi-

cle while the engine is stopped by the

Stop & Start system (while the Stop &

Start indicator is on).

An accident may occur due to the

automatic engine start function.

●

Ensure that the engine is not stopped

by the Stop & Start system while the

vehicle is in a poorly ventilated area.

The engine may restart due to the

automatic engine start function, caus-

ing exhaust gases to collect and enter

the vehicle, possibly resulting in death

or a serious health hazard.

NOTICE

■

To ensure the system operates cor-

rectly

If any of the following situations occur,

the Stop & Start system may not operate

correctly. Have your vehicle checked by

any authorized Lexus retailer or Lexus

authorized repairer, or any reliable

repairer.

●

While the driver’s seat belt is fastened,

the driver’s and front passenger’s seat

belt reminder light flashes.

●

Even though the driver’s seat belt is not

fastened, the driver’s and front passen-

ger’s seat belt reminder light does not

illuminate.

●

Even though the driver’s door is

closed, the open door warning light is

illuminated or the interior light is illumi-

nated when the interior light switch is

in the door position.

●

Even though the driver’s door is open,

the open door warning light does not

illuminate or the interior light does not

illuminate when the interior light switch

is in the door position.

Disabling the Stop & Start sys-
tem

286

4-5. Using the driving support systems

●

With the Stop & Start system disabled,

pressing the Stop & Start cancel switch

will re-enable the system but not stop the

engine.

From the next time the vehicle is stopped

(after Stop & Start system has been ena-

bled), the engine will be stopped.

After the engine is stopped by the Stop
& Start system when the vehicle is on
an incline, brake force is temporarily
maintained to prevent rolling back-
wards until the engine is restarted and
drive force is generated.
When drive force is generated, the
maintained brake force is automatically
canceled.



This function operates on flat sur-
faces as well as steep inclines.



Sound may be generated from the
brakes, but this is not a malfunction.



Brake pedal response may change
and vibration may occur, but these
are not malfunctions.

: If equipped

Meter control switches

Hill-start assist control (when the
shift position is in D)

BSM (Blind Spot Monitor)

The Blind Spot Monitor is a system
that uses rear side radar sensors
installed on the inner side of the
rear bumper on the left and right
side to assist the driver in confirm-
ing safety when changing lanes.

WARNING

■

Cautions regarding the use of the sys-

tem

The driver is solely responsible for safe

driving. Always drive safely, taking care

to observe your surroundings.
The Blind Spot Monitor is a supplemen-

tary function which alerts the driver that a

vehicle is in a blind spot of the outside

rear view mirrors or is approaching rap-

idly from behind into a blind spot. Do not

overly rely on the Blind Spot Monitor. As

the function cannot judge if it is safe to

change lanes, over reliance could lead to

an accident resulting in death or serious

injury.
As the system may not function correctly

under certain conditions, the driver’s own

visual confirmation of safety is necessary.

System components

287

4-5. Using the driving support systems

Driving

Turning the Blind Spot Monitor on/off.

Outside rear view mirror indicators

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
indicator on the detected side will illumi-
nate. If the turn signal lever is operated
toward the detected side, the outside rear
view mirror indicator flashes.

■

Outside rear view mirror indicator visi-

bility

In strong sunlight, the outside rear view mir-

ror indicator may be difficult to see.

■

When “Blind Spot Monitor Unavailable”

is shown on the multi-information dis-

play

Ice, snow, mud, etc., may be attached to the

rear bumper around the sensors. (



P.287)

The system should return to normal opera-

tion after removing the ice, snow, mud, etc.

from the rear bumper. Additionally, the sen-

sors may not operate normally when driving

in extremely hot or cold environments.

■

Customization

Some functions can be customized.

(



P.476)

WARNING

■

To ensure the system can operate

properly

Blind Spot Monitor sensors are installed

behind the left and right sides of the rear

bumper respectively. Observe the fol-

lowing to ensure the Blind Spot Monitor

can operate correctly.

●

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.287) will be displayed. In this situa-

tion, clear off the dirt or snow and drive
the vehicle with the operation conditions
of the BSM function (



P.289) satisfied

for approximately 10 minutes. If the
warning message does not disappear,
have the vehicle inspected by any autho-
rized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

●

Do not attach accessories, stickers

(including transparent stickers), alumi-

num tape, etc. to a sensor or its sur-

rounding area on the rear bumper.

●

Do not subject a sensor or its sur-

rounding area on the rear bumper to a

strong impact.

If a sensor is moved even slightly off

position, the system may malfunction

and vehicles may not be detected cor-

rectly.In the following situations, have

your vehicle inspected by any author-

ized Lexus retailer or Lexus authorized

repairer, or any reliable repairer.

• 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.

288

4-5. Using the driving support systems

Use the meter control switches to turn
on/off the function.

Press

to select

Press

to select

and

then press

When the BSM function is disabled, the

BSM OFF indicator illuminates. (Each time

the engine switch is turned off then

changed to IGNITION ON mode, the

Blind Spot Monitor will be enabled auto-

matically.)

■

Vehicles that can be detected by the Blind Spot Monitor

The Blind Spot Monitor uses rear side radar sensors to detect the following vehi-
cles traveling in adjacent lanes and advises the driver of the presence of such vehi-
cles via the indicators on the outside rear view mirrors.

Vehicles that are traveling in areas that are not visible using the outside rear
view mirrors (the blind spots)
Vehicles that are approaching rapidly from behind in areas that are not visible
using the outside rear view mirrors (the blind spots)

■

The Blind Spot Monitor detection areas

The areas that vehicles can be detected in are outlined below.

WARNING

●

Do not modify the sensor or surround-

ing area on the rear bumper.

●

If a sensor or the rear bumper needs to

be removed/installed or replaced,

contact any authorized Lexus retailer

or Lexus authorized repairer, or any

reliable repairer.

●

Do not paint the rear bumper any

color other than an official Lexus color.

Turning the Blind Spot Monitor
on/off

Blind Spot Monitor operation

289

4-5. Using the driving support systems

Driving

The range of each detection area is:

Approximately 0.5 m (1.6 ft.) to 3.5 m (11.5 ft.) from either side of the vehicle

Approximately 1 m (3.3 ft.) forward of the rear bumper
Approximately 3 m (9.8 ft.) from the rear bumper

Approximately 3 m (9.8 ft.) to 60 m (197 ft.) from the rear bumper

: The area between the side of the vehicle and 0.5 m (1.6 ft.) from the side of the vehicle

cannot be detected.

: The greater the difference in speed between your vehicle and the detected vehicle is,

the farther away the vehicle will be detected, causing the outside rear view mirror indi-
cator to illuminate or flash.

■

The Blind Spot Monitor is operational

when

The Blind Spot Monitor is operational when

all of the following conditions are met:

●

The Blind Spot Monitor is on.

●

The shift position is in a position other

than R.

●

The vehicle speed is greater than approx-

imately 16 km/h (10 mph).

■

The Blind Spot Monitor will detect a

vehicle when

The Blind Spot Monitor will detect a vehicle

present in the detection area in the follow-

ing situations:

●

A vehicle in an adjacent lane overtakes

your vehicle.

●

You overtake a vehicle in an adjacent lane

slowly.

●

Another vehicle enters the detection

area when it changes lanes.

■

Conditions under which the system will

not detect a vehicle

The Blind Spot Monitor is not designed to

detect the following types of vehicles and/or

objects:

●

Small motorcycles, bicycles, pedestrians,
etc.

●

Vehicles traveling in the opposite direc-

tion

●

Guardrails, walls, signs, parked vehicles
and similar stationary objects

●

Following vehicles that are in the same
lane

●

Vehicles traveling 2 lanes away from your
vehicle

●

Vehicles which are being overtaken rap-
idly by your vehicle

: Depending on the conditions, detection

of a vehicle and/or object may occur.

A
B
C
D

290

4-5. Using the driving support systems

■

Conditions under which the system may

not function correctly

●

The Blind Spot Monitor may not detect

vehicles correctly in the following situa-

tions:

• When the sensor is misaligned due to a

strong impact to the sensor or its sur-

rounding area

• When mud, snow, ice, a sticker, etc. is

covering the sensor or surrounding area

on the rear bumper

• When driving on a road surface that is

wet with standing water during bad

weather, such as heavy rain, snow, or fog

• When multiple vehicles are approaching

with only a small gap between each vehi-

cle

• When the distance between your vehicle

and a following vehicle is short

• When there is a significant difference in

speed between your vehicle and the vehi-

cle that enters the detection area

• When the difference in speed between

your vehicle and another vehicle is

changing

• When a vehicle enters a detection area

traveling at about the same speed as your

vehicle

• As your vehicle starts from a stop, a vehi-

cle remains in the detection area

• When driving up and down consecutive

steep inclines, such as hills, dips in the

road, etc.

• When driving on roads with sharp bends,

consecutive curves, or uneven surfaces

• When vehicle lanes are wide, or when

driving on the edge of a lane, and the

vehicle in an adjacent lane is far away

from your vehicle

• When an accessory (such as a bicycle

carrier) is installed to the rear of the vehi-

cle

• When there is a significant difference in

height between your vehicle and the

vehicle that enters the detection area

• Immediately after the Blind Spot Monitor

is turned on

●

Instances of the Blind Spot Monitor

unnecessarily detecting a vehicle and/or

object may increase in the following situ-

ations:

• When the sensor is misaligned due to a

strong impact to the sensor or its sur-

rounding area

• When the distance between your vehicle

and a guardrail, wall, etc. that enters the

detection area is short

• When driving up and down consecutive

steep inclines, such as hills, dips in the

road, etc.

• When vehicle lanes are narrow, or when

driving on the edge of a lane, and a vehi-

cle traveling in a lane other than the adja-

cent lanes enters the detection area

• When driving on roads with sharp bends,

consecutive curves, or uneven surfaces

• When the tires are slipping or spinning

• When the distance between your vehicle

and a following vehicle is short

• When an accessory (such as a bicycle

carrier) is installed to the rear of the vehi-

cle

291

4-5. Using the driving support systems

Driving

■

Lexus parking assist-sensor

Ultrasonic sensors are used to detect
static objects in the detection area
when driving at a low speed or backing
up. (



P.292)

■

RCTA (Rear crossing traffic alert)
function (if equipped)

Radar sensors are used to detect
approaching vehicles in the detection
areas behind the vehicle when backing
up. (



P.298)

■

RCD (Rear camera detection)
function (if equipped)

A rear camera sensor is used to detect
pedestrians in the detection area
behind the vehicle when backing up.
(



P.303)

■

Adjusting the buzzer volume

The buzzer volume can be adjusted on
the multi-information display. The vol-
ume of buzzers for the Lexus parking
assist-sensor, RCTA function and RCD
function will be adjusted simultane-
ously.
Use the meter control switches to
change settings. (



P.82)

Press

to select

Press

to select “PKSA”

and then press

Press

to select

and

then press

Each time the switch is pressed, the volume

level will change between 1, 2, and 3.

■

Muting a buzzer

A mute button will be displayed on the
multi-information display when an
object or pedestrian is detected. To
mute the buzzer, press

The buzzers for the Lexus parking
assist-sensor, RCTA function and RCD
function will be muted simultaneously.
Mute will be canceled automatically in
the following situations:



When the shift position is changed.



When the vehicle speed exceeds a
certain speed.



When the operating function is tem-
porarily canceled.



When the operating function is disa-

PKSA (Parking Support
Alert)

The Parking Support Alert system
consists of the following functions
that operate when driving at a low
speed or backing up, such as when
parking. When the system deter-
mines that a collision with a
detected object, such as a wall, or
pedestrian is high, a warning oper-
ates to urge the driver to take eva-
sive action.

PKSA (Parking Support Alert)
system

Setting the buzzer volume

293

4-5. Using the driving support systems

Driving

segmentsmay blink.)



Multi-information display and
head-up display

Front corner sensor detection
Front center sensor detection
Rear corner sensor detection
Rear center sensor detection



Center Display

Front corner sensor detection
Front center sensor detection
Rear corner sensor detection
Rear center sensor detection

Use the meter control switches to ena-
ble/disable the Lexus parking
assist-sensor. (



P.82)

Press

to select

Press

to select “PKSA”

and then press

Press

to select

and

then press

When the Lexus parking assist-sensor
function is disabled, the Lexus parking
assist-sensor OFF indicator (



P.70)

illuminates.
To re-enable the system when it was
disabled, select

on the multi-infor-

mation display, select

and then On.

If disabled using this method, the sys-
tem will not be re-enabled by turning
the engine switch off and then to IGNI-
TION ON mode.

Turning Lexus parking assist-sen-
sor on/off

A
B
C
D

WARNING

■

Cautions regarding the use of the sys-

tem

There is a limit to the degree of recogni-

tion accuracy and control performance

that this system can provide, do not

overly rely on this system. The driver is

always responsible for paying attention

to the vehicle’ surroundings and driving

safely.

■

To ensure the system can operate

properly

Observe the following precautions.

Failing to do so may result in the vehicle

being unable to be driven safely and pos-

sibly cause an accident.

●

Do not damage the sensors, and

always keep them clean.

294

4-5. Using the driving support systems

■

The system can be operated when

●

The engine switch is in IGNITION ON

mode.

●

Lexus parking assist-sensor function is

on.

●

The vehicle speed is less than about 10

km/h (6 mph).

●

A shift position other than P is selected.

■

Setting the buzzer volume

The buzzer volume can be adjusted on the

multi-information display. (



P.291)

■

If “Clean Parking Assist Sensor” is dis-

played on the multi-information display

A sensor may be covered with water drops,

ice, snow, dirt, etc. Remove the water drops,

ice, snow, dirt, etc., from the sensor to return

the system to normal.
If a sensor is dirty, the position of the dirty

sensor will be shown on the display.
Due to ice forming on a sensor at low tem-

peratures, a warning message may be dis-

played or the sensor may not be able to

detect an object. Once the ice melts, the

system will return to normal.

■

If “Parking Assist Unavailable” is dis-

played on the multi-information display

Water may be continuously flowing over the

sensor surface, such as in a heavy rain.

When the system determines that it is nor-

mal, the system will return to normal.

■

Sensor detection information

●

The following situations may occur dur-

ing use.

• The sensors may be able to only detect

objects near the front and rear bumpers.

• Depending on the shape of the object

and other factors, the detection distance

may shorten, or detection may be impos-

sible.

• There will be a short delay between

object detection and display. Even at low

speeds, there is a possibility that the

object will come within the sensor’s

detection areas before the display is

shown and the warning beep sounds.

• It might be difficult to hear the buzzer due

WARNING

●

Do not attach a sticker or install an

electronic component, such as a

backlit license plate (especially fluo-

rescent type), fog lights, fender pole or

wireless antenna near a radar sensor.

●

Do not subject the surrounding area of

the sensor to a strong impact. If sub-

jected to an impact, have the vehicle

inspected by any authorized Lexas

retailer or Lexas authorized repairer,

or any reliable repairer. If the front or

rear bumper needs to be

removed/installed or replaced, con-

tact any authorized Lexas retailer or

Lexas authorized repairer, or any relia-

ble repairer.

●

Do not modify, disassemble or paint

the sensors.

●

Do not attach a license plate cover.

●

Keep your tires properly inflated.

■

When to disable the function

In the following situations, disable the

function as it may operate even though

there is no possibility of a collision.

●

Failing to observe the warnings above.

●

A non-genuine Lexus suspension

(lowered suspension, etc.) is installed.

■

Notes when washing the vehicle

Do not apply intensive bursts of water or

steam to the sensor area.
Doing so may result in the sensor mal-

functioning.

●

When using a high pressure washer to

wash the vehicle, do not spray the sen-

sors directly, as doing so may cause a

sensor to malfunction.

●

When using steam to clean the vehicle,

do not direct steam too close to the

sensors as doing so may cause a sen-

sor to malfunction.

295

4-5. Using the driving support systems

Driving

to the volume of the audio system or air

flow noise of the air conditioning system.

• It may be difficult to hear the buzzer if

buzzers for other systems are sounding.

■

Objects which the system may not be

properly detected

The shape of the object may prevent the

sensor from detecting it. Pay particular

attention to the following objects:

●

Wires, fences, ropes, etc.

●

Cotton, snow and other materials that

absorb sound waves

●

Sharply-angled objects

●

Low objects

●

Tall objects with upper sections project-

ing outwards in the direction of your vehi-

cle

People may not be detected if they are

wearing certain types of clothing.

■

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.

●

There is dirt, snow, water drops or ice on

a sensor. (Cleaning the sensors will

resolve this problem.)

●

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 dis-

played abnormally, or objects, such as a

wall, may not be detected.

●

When a sensor or the area around a sen-

sor is extremely hot or cold.

●

On an extremely bumpy road, on an

incline, on gravel, or on grass.

●

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

●

A sensor is coated with a sheet of spray

or heavy rain.

●

If objects draw too close to the sensor.

●

When a pedestrian is wearing clothing

that does not reflect ultrasonic waves (ex.

skirts with gathers or frills).

●

When objects that are not perpendicular

to the ground, not perpendicular to the

vehicle traveling direction, uneven, or

waving are in the detection range.

●

Strong wind is blowing

●

When driving in inclement weather such

as fog, snow or a sandstorm

●

When an object that cannot be detected

is between the vehicle and a detected

object

●

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

●

If the orientation of a sensor has been

changed due to a collision or other

impact

●

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

●

If the front of the vehicle is raised or low-

ered due to the carried load

●

If the vehicle cannot be driven in a stable

manner, such as when the vehicle has

been in an accident or is malfunctioning

●

When a tire chains, compact spare tire or

an emergency tire puncture repair kit is

used

■

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

296

4-5. Using the driving support systems

possibility of a collision.

●

When driving on a narrow road

●

When driving toward a banner, flag,

low-hanging branch or boom barrier

(such as those used at railroad crossings,

toll gates and parking lots)

●

When there is a rut or hole in the surface

of the road

●

When driving on a metal cover (grating),

such as those used for drainage ditches

●

When driving up or down a steep slope

●

If a sensor is hit by a large amount of

water, such as when driving on a flooded

road

●

There is dirt, snow, water drops or ice on

a sensor. (Cleaning the sensors will

resolve this problem.)

●

A sensor is coated with a sheet of spray

or heavy rain

●

When driving in inclement weather such

as fog, snow or a sandstorm

●

When strong winds are blowing

●

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

●

If the front of the vehicle is raised or low-

ered due to the carried load

●

If the orientation of a sensor has been

changed due to a collision or other

impact

●

The vehicle is approaching a tall or

curved curb

●

Driving close to columns (H-shaped steel

beams, etc.) in multi-story parking

garages, construction sites, etc.

●

If the vehicle cannot be driven in a stable

manner, such as when the vehicle has

been in an accident or is malfunctioning

●

On an extremely bumpy road, on an

incline, on gravel, or on grass

●

When a tire chains, compact spare tire or

an emergency tire puncture repair kit is

used

■

If a battery terminal has been discon-

nected and reconnected

The system needs to be initialized. To initial-

ize the system, drive the vehicle straight

ahead for 5 seconds or more at a speed of

approximately 35 km/h (22 mph) or more.

Additionally, for vehicles with the Parking

Support Brake function, turn the steering

wheel fully to the left and right with the vehi-

cle stopped.

297

4-5. Using the driving support systems

Driving

■

Detection range of the sensors

Approximately 100 cm (3.3 ft.)
Approximately 150 cm (4.9 ft.)
Approximately 60 cm (2.0 ft.)

The diagram shows the detection range of
the sensors. Note that the sensors cannot
detect objects that are extremely close to
the vehicle.
The range of the sensors may change
depending on the shape of the object, etc.

■

Buzzer operation and approximate
distance to object

A buzzer sounds when the sensors are
operating. When 2 or more objects are
detected simultaneously, the buzzer
sounds for the nearest object.



Buzzer: Sounds intermittently

Front center sensor: Approximately 100
cm (3.3 ft.) to 60 cm (2.0 ft.)
Rear center sensor: Approximately 150
cm (4.9 ft.) to 60 cm (2.0 ft.)



Buzzer: Sounds in short intervals

Approximately 60 cm (2.0 ft.) to 45 cm
(1.5 ft.)



Buzzer: Sounds in extremely short
intervals

Approximately 45 cm (1.5 ft.) to 30 cm
(1.0 ft.)



Buzzer: Sounds continuously

Less than approximately 30 cm (1.0 ft.)

: The buzzer beeps faster as the vehicle

approaches an object.
Automatic buzzer mute function: After a
buzzer begins sounding, if the distance
between the vehicle and the detected
object does not become shorter, the
buzzer will be muted automatically.

System detection range

A
B
C

Lexus LS (2022 year). Manual in english - page 17