2022 LEXUS ES300h sensor

2534-5. Using the driving support systems
4
Driving
QECB (Electronically Controlled
Brake System)
The electronically controlled system
generates braking force correspond-
ing to the brake operation
QABS (Anti-lock Brake System)
Helps to prevent wheel lock when the
brakes are applied suddenly, or if the
brakes are applied while driving on a
slippery road surface
QBrake assist
Generates an increased level of brak-
ing force after the brake pedal is
depressed when the system detects a
panic stop situation
QVSC (Vehicle Stability Control)
Helps the driver to control skidding
when swerving suddenly or turning on
slippery road surfaces.
QEnhanced VSC (Enhanced Vehi-
cle Stability Control)
Provides cooperative control of the
ABS, TRAC, VSC and EPS. Helps to maintain directional stability
when swerving on slippery road sur-
faces by controlling steering perfor-
mance.
QSecondary Collision Brake
When the SRS airbag sensor detects a
collision and the system operates, the
brakes and brake lights are automati-
cally controlled to reduce the vehicle
speed and help reduce the possibility
of further damage due to a secondary
collision
QTRAC (Traction Control)
Helps to maintain drive power and
prevent the drive wheels from spinning
when starting the vehicle or accelerat-
ing on slippery roads
QActive Cornering Assist (ACA)
Helps to prevent the vehicle from drift-
ing to the outer side by performing
inner wheel brake control when
attempting to accelerate while turning
QHill-start assist control
Helps to reduce the backward move-
ment of the vehicle when starting on an
uphill
QEPS (Electric Power Steering)
Employs an electric motor to reduce
the amount of effort needed to turn the
steering wheel
QAVS (Adaptive Variable Suspen-
sion system) (if equipped)
By independently controlling the
damping force of the shock absorbers
for each of the 4 wheels according to
the road and driving conditions, this
Driving assist systems
To keep driving safety and perfor-
mance, the following systems oper-
ate automatically in response to
various driving situations. Be
aware, however, that these systems
are supplementary and should not
be relied upon too heavily when
operating the vehicle.
Summary of the driving assist
systems

2554-5. Using the driving support systems
4
Driving
QSounds and vibrations caused by the
ABS, brake assist, VSC, TRAC and hill-
start assist control systems
OA sound may be heard from the engine
compartment when the brake pedal is
depressed repeatedly, when the hybrid
system is started or just after the vehicle
begins to move. This sound does not indi-
cate that a malfunction has occurred in
any of these systems.
OAny of the following conditions may
occur when the above systems are oper-
ating. None of these indicates that a mal-
function has occurred.
• Vibrations may be felt through the vehi- cle body and steering.
• A motor sound may be heard also after the vehicle comes to a stop.
QECB operating sound
ECB operating sound may be heard in the
following cases, but it does not indicate that
a malfunction has occurred.
OOperating sound heard from the engine
compartment when the brake pedal is
operated.
OMotor sound of the brake system heard
from the front part of the vehicle when
the driver’s door is opened.
OOperating sound heard from the engine
compartment when one or two minutes
passed after the stop of the hybrid sys-
tem.
QActive Cornering Assist operation
sounds and vibrations
When the Active Cornering Assist is oper-
ated, operation sounds and vibrations may
be generated from the brake system, but
this is not a malfunction.
QEPS operation sound
When the steering wheel is operated, a
motor sound (whirring sound) may be
heard. This does not indicate a malfunction.
QAutomatic reactivation of TRAC and
VSC systems
After turning the TRAC and VSC systems
off, the systems will be automatically re-
enabled in the following situations:
OWhen the power switch is turned off
OIf only the TRAC system is turned off, the
TRAC will turn on when vehicle speed
increases
If both the TRAC and VSC systems are
turned off, automatic re-enabling will not
occur when vehicle speed increases.
QSecondary Collision Brake operating
conditions
The system operates when the SRS airbag
sensor detects a collision while the vehicle
is in motion.
However, the system does not operate
when the components are damaged.
QSecondary Collision Brake automatic
cancellation
The system is automatically canceled in any
of the following situations.
OThe vehicle speed drops to approxi-
mately 6 mph (10 km/h)
OA certain amount of time elapses during
operation
OThe accelerator pedal is depressed a
large amount
QOperating conditions of Active Corner-
ing Assist
The system operates when the following
occurs.
OTRAC/VSC can operate
OThe driver is attempting to accelerate
while turning
OThe system detects that the vehicle is
drifting to the outer side
OThe brake pedal is released
QReduced effectiveness of the EPS sys-
tem
The effectiveness of the EPS system is
reduced to prevent the system from over-
heating when there is frequent steering
input over an extended period of time. The
steering wheel may feel heavy as a result.
Should this occur, refrain from excessive
steering input or stop the vehicle and turn
the hybrid system off. The EPS system
should return to normal within 10 minutes.

2755-3. Using the air conditioning system
5
Interior features
Display the heated steering
wheel/seat heaters/seat ventilators
control screen (if equipped)
( P.281)
Adjust the left-hand side tempera-
ture setting
Adjust the fan speed setting
Adjust the right-hand side tem-
perature setting
Set cooling and dehumidification
function on/off
Adjust the temperature for driver
and front passenger’s seats sepa-
rately (“DUAL” mode) ( P.277)
Select the air flow mode
QWindshield wiper de-icer (if equipped)
This feature is used to prevent ice from
building up on the windshield and wiper
blades.
The windshield wiper de-icer will automati-
cally turn off after approximately 15 min-
utes.
QEco air conditioning mode
When Eco drive mode is selected using the
Driving Mode Select switch, eco air condi-
tioning mode turns on.
When a drive mode other than Eco drive
mode is selected, eco air conditioning
mode may turn off.
1 Press the automatic mode switch
or select “AUTO” on the sub func-
tion menu. ( P.273)
2 Press the outside/recirculated air
mode switch to switch to automatic
air intake mode.
The air conditioning system automatically
switches between outside air and recircu-
lated air modes.
3Adjust the temperature setting.
4 To stop the operation, press the off
switch or select “Off” on the sub
function menu. ( P.273)
If the fan speed setting or air flow
modes are operated, the automatic
mode indicator goes off. However,
automatic mode for functions other
than that operated is maintained.
QUsing automatic mode
Fan speed is adjusted automatically
according to the temperature setting and
the ambient conditions.
Therefore, the fan may stop for a while until
warm or cool air is ready to flow immedi-
ately after the automatic mode switch is
pressed or “AUTO” is selected.
Cool air may blow around the upper body
even when the heater is on due to sunlight.
QWindshield fog detection function
When automatic mode is set, the humidity
sensor detects fog on the windshield and
controls the air conditioning system to pre-
vent fog.
QAutomatic mode for air intake control
In automatic mode, the system detects
exhaust gas and other pollutants and auto-
matically switches between outside air and
recirculated air modes.
When the dehumidification function is off,
WARNING
QTo prevent burns (vehicles with wind-
shield wiper de-icer)
Do not touch the glass at lower part of
the windshield or to the side of the front
pillars when the windshield wiper de-icer
is on.
A
B
C
D
E
F
G
Using automatic mode

2765-3. Using the air conditioning system
and the fan is operating, turning automatic
mode on will activate the dehumidification
function. The next time the dehumidification
function is turned off, the automatic mode
for switching between outside air and recir-
culated air modes is canceled.
This function automatically controls the
air conditioning airflow so that priority
is given to the front seats. When the
front passenger seat is not occupied,
airflow may switch to only the driver’s
seat. Unnecessary air conditioning is
suppressed, contributing to increased
fuel efficiency.
Front seat concentrated airflow mode
operates in the following situations.
No passengers are detected in the rear seats
 The windshield defogger is not
operating
While operating, illuminates.
QManually turning front seat con-
centrated airflow mode on/off
In front seat concentrated airflow
mode, directing airflow to the front
seats only and to all seats can be
switched via switch operation. When
the mode has been switched manually,
automatic airflow control stops operat-
ing.
Select on the center display
and switch the airflow.
 Indicator illuminated: Airflow to the
front seats only
 Indicator off: Airflow to all the seats
QOperation of automatic airflow control
OIn order to maintain a comfortable inte-
rior, airflow may be directed to seats
without passengers immediately after the
hybrid system is started and at other
times depending on the outside tempera-
ture.
OAfter the hybrid system is started, if pas-
sengers move around inside or enter/exit
the vehicle, the system cannot accurately
detect the presence of passengers and
automatic airflow control will not oper-
ate.
QOperation of manual airflow control
Even if the function is manually switched to
directing airflow to on ly the front seats,
when a rear seat is occupied, it may auto-
matically direct airflow to all seats.
QTo return to automatic airflow control
1 With the indicator off, turn the power
switch off.
NOTICE
QHumidity sensor
In order to detect fog on the windshield,
a sensor which monitors the temperature
of the windshield, the surround humidity,
etc. is installed.
Follow these points to avoid damaging
the sensor:
ODo not disassemble the sensor
ODo not spray the glass cleaner on the
sensor or subject it to strong impacts
ODo not stick anything on the sensor
Front seat concen trated airflow
mode (S-FLOW)

3096-1. Maintenance and care
6
Maintenance and care
parking in hot weather
QBrake pads and calipers
Rust may form if the vehicle is parked with
wet brake pads or disc rotors, causing them
to stick. Before parking the vehicle after it is
washed, drive slowly and apply the brakes
several times to dry the parts.
QBumpers
Do not scrub with abrasive cleaners.
QFront side windows water-repellent
coating
OThe following precautions can extend the
effectiveness of the water-repellent coat-
ing.
• Remove any dirt, etc. from the front side
windows regularly.
• Do not allow dirt and dust to accumulate on the windows for a long period.
Clean the windows with a soft, damp
cloth as soon as possible.
• Do not use wax or glass cleaners that
contain abrasives when cleaning the win-
dows.
• Do not use any metallic objects to
remove condensation build up.
OWhen the water-repellent performance
has become insufficient, the coating can
be repaired. Contact your Lexus dealer.
QPlated portions
If dirt cannot be removed, clean the parts as
follows:
OUse a soft cloth dampened with an
approximately 5% solution of neutral
detergent and water to clean the dirt off.
OWipe the surface with a dry, soft cloth to
remove any remaining moisture.
OTo remove oily deposits, use alcohol wet
wipes or a similar product.
WARNING
QWhen washing the vehicle
Do not apply water to the inside of the
engine compartment. Doing so may
cause the electrical components etc. to
catch fire.
QWhen cleaning the windshield (vehi-
cles with rain-sensing windshield wip-
ers)
Set the wiper switch to off.
If the wiper switch is in “AUTO”, the wip-
ers may operate unexpectedly in the fol-
lowing situations, and may result in hands
being caught or other serious injuries
and cause damage to the wiper blades.
Off
AUTO
OWhen the upper part of the windshield
where the raindrop sensor is located is
touched by hand
OWhen a wet rag or similar is held close
to the raindrop sensor
OIf something bumps against the wind-
shield
OIf you directly touch the raindrop sen-
sor body or if something bumps into
the raindrop sensor
QPrecautions regarding the exhaust
pipes
As exhaust gases cause the exhaust
pipes to become quite hot, do not touch
the exhaust pipes while the hybrid system
is operating or immediately after the
hybrid system is turned off.
When washing the vehicle, be careful not
to touch the exhaust pipes until they have
cooled sufficiently, as touching hot
exhaust pipes can cause burns.
A
B

3687-2. Steps to take in an emergency
QTire pressure warning light
QLTA indicator* (warning buzzer)
*: This light illuminates on the multi-information display.
QIntuitive parking assist OFF indicator (warning buzzer)
Warning lightDetails/Actions
When the light comes on after blinking for approximately 1 minute:
Malfunction in the tire pressure warning system
Have the system checked by your Lexus dealer.
When the light comes on:
Low tire inflation pressure such as
 Natural causes
 Flat tire
 Immediately stop the vehicle in a safe place.
Handling method ( P.371)
Warning lightDetails/Actions
(orange)
Indicates a malfunction in the LTA (Lane Tracing Assist)
 Follow the instructions displayed on the multi-information display.
(  P.200)
Warning lightDetails/Actions
(flashes)
(if equipped)
When a buzzer sounds:
Indicates a malfunction in the intuitive parking assist function
 Have the vehicle inspected by your Lexus dealer immediately.
When a buzzer does not sound:
Indicates that the system is temporarily unavailable, possibly due to a
sensor being dirty or covered with ice, etc.
 Follow the instructions displayed on the multi-information display.
(  P.224)

3697-2. Steps to take in an emergency
7
When trouble arises
QRCTA OFF indicator (warning buzzer)
QRCD OFF indicator (warning buzzer)
QPKSB OFF indicator (warning buzzer)
Warning lightDetails/Actions
(flashes)
When a buzzer sounds:
Indicates a malfunction in the RCTA (Rear Cross Traffic Alert) function
Have the vehicle inspected by your Lexus dealer immediately.
When a buzzer does not sound:
Indicates that the rear bumper around the radar sensor is covered with
dirt, etc. ( P.215)
 Follow the instructions displayed on the multi-information display.
(  P.231)
Warning lightDetails/Actions
(flashes)
(if equipped)
When a buzzer sounds:
Indicates a malfunction in the RCD (Rear Camera Detection) function
 Have the vehicle inspected by your Lexus dealer immediately.
When a buzzer does not sound:
Indicates that the function temporarily cannot be used due to the cam-
era being dirty, etc.
 Follow the instructions displayed on the multi-information display.
(  P.237, 374)
Warning lightDetails/Actions
(flashes)
(if equipped)
When a buzzer sounds:
Indicates a malfunction in the PKSB (Parking Support Brake) system
 Have the vehicle inspected by your Lexus dealer immediately.
When a buzzer does not sound:
Indicates that the system is temporarily unavailable, possibly due to a
sensor being dirty or covered with ice, etc.
 Follow the instructions displayed on the multi-information display.
(  P.244, 374)

3717-2. Steps to take in an emergency
7
When trouble arises
QBrake hold operated indicator (warning buzzer)
QHybrid system overheat warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
QMaster warning light (warning buzzer)
QWarning buzzer
In some cases, the buzzer may not be heard
due to being in a noisy location or audio
sound.
QFront passenger detection sensor, seat
belt reminder and warning buzzer
OIf luggage is placed on the front passen-
ger seat, the front passenger detection
sensor may cause the warning light to
flash and the warning buzzer to sound
even if a passenger is not sitting in the
seat.
OIf a cushion is placed on the seat, the sen-
sor may not detect a passenger, and the
warning light may not operate properly.
QSRS warning light
This warning light system monitors the air-
bag sensor assembly, front impact sensors,
side impact sensors (front door), side
impact sensors (front), side impact sensors
(rear), driver’s seat position sensor, driver’s
seat belt buckle switch, front passenger
occupant classification system (ECU and
sensors), “PASSENGER AIR BAG” indica- tor lights, front passenger’s seat belt buckle
switch, seat belt pret
ensioners, airbags,
interconnecting wiring and power sources.
(  P.28)
QElectric power steering system warning
light (warning buzzer)
When the 12-volt battery charge becomes
insufficient or the voltage temporarily
drops, the electric power steering system
warning light may come on and the warning
buzzer may sound.
QWhen the tire pressure warning light
comes on
Inspect the tires to check if a tire is punc-
tured.
If a tire is punctured: P.379
If none of the tires are punctured:
Turn the power switch off then turn it to ON
mode. Check if the tire pressure warning
light comes on or blinks.
Warning lightDetails/Actions
(flashes)
Indicates a malfunction in the brake hold system
 Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
Indicates that the hybrid system has overheated
Stop the vehicle in a safe place. Handling method ( P.397)
Warning lightDetails/Actions
A buzzer sounds and the warning light comes on and flashes to indicate
that the master warning system has detected a malfunction.
 P.374