2022 LEXUS ES300h brake sensor

301-1. For safe use
Driver’s seat belt buckle switch
Airbag sensor assembly
“PASSENGER AIR BAG” indicator lights
Front passenger’s seat belt buckle switch
Front impact sensors
Your vehicle is equipped with ADVANCED AIRBAGS designed based on the
US motor vehicle safety standards (FMVSS208). The airbag sensor assembly
(ECU) controls airbag deployment based on information obtained from the sen-
sors etc. shown in the system components diagram above. This information
includes crash severity and occupant information. As the airbags deploy, a chemi-
cal reaction in the inflators quickly fills the airbags with non-toxic gas to help
restrain the motion of the occupants.
QIf the SRS airbags deploy (inflate)
OSlight abrasions, burns, bruising etc., may
be sustained from SRS airbags, due to the
extremely high speed deployment (infla-
tion) by hot gases.
OA loud noise and white powder will be
emitted.
OParts of the airbag module (steering
wheel hub, airbag cover and inflator) as
well as the front seats, parts of the front
and rear pillars, and roof side rails, may
be hot for several minutes. The airbag
itself may also be hot.
OThe windshield may crack.
OThe hybrid system will be stopped and
fuel supply to the engine will be stopped.
(  P.65)
OAll of the doors will be unlocked.
( P.105)
OThe brakes and stop lights will be con-
trolled automatically. ( P.253)
OThe interior lights will turn on automati-
cally. ( P.283)
OThe emergency flashers will turn on auto-
matically. ( P.358)
OFor Lexus Enform Safety Connect sub-
scribers, if any of the following situations
occur, the system is designed to send an
emergency call to the response center,
notifying them of the vehicle’s location (without needing to push the “SOS” but-
ton) and an agent will attempt to speak
with the occupants to ascertain the level
of emergency and assistance required. If
the occupants are unable to communi-
cate, the agent automatically treats the
call as an emergency and helps to dis-
patch the necessary emergency services.
(
 P.55)
•An SRS airbag is deployed.
• A seat belt pretensioner is activated.
• The vehicle is involved in a severe rear- end collision.
QSRS airbag deployment conditions (SRS
front airbags)
OThe SRS front airbags will deploy in the
event of an impact that exceeds the set
threshold level (the level of force corre-
sponding to an approximately 12 - 18
mph [20 - 30 km/h] frontal collision with
a fixed wall that does not move or
deform).
However, this threshold velocity will be
considerably higher in the following situ-
ations:
• If the vehicle strikes an object, such as a parked vehicle or sign pole, which can
move or deform on impact
• If the vehicle is involved in an underride collision, such as a collision in which the
front of the vehicle “underrides”, or goes
under, the bed of a truck
ODepending on the type of collision, it is
N
O
P
Q
R

1634-3. Operating the lights and wipers
4
Driving
4-3.Op erating the lights and wipers
Operating the switch turns on
the lights as follows:U.S.A.
Canada
1 The side marker, parking
lights/daytime running lights
(  P.163), tail, license plate and
instrument panel lights turn on.
2 The headlights and all the
lights listed above (except daytime
running lights) turn on.
3 The headlights, parking
lights/daytime running lights (
 P.163) and all the lights listed
above turn on and off automatically.
4 (U.S.A.) Off
QAUTO mode can be used when
The power switch is in ON mode.
QDaytime running light system
OThe daytime running lights illuminate
using the same lights as the parking lights
and illuminate brighter than the parking
lights.
OTo make your vehicle more visible to
other drivers during daytime driving, the
daytime running lights turn on automati-
cally when all of the following conditions
are met. (The daytime running lights are
not designed for use at night.)
• The hybrid system is operating
• The parking brake is released
• The headlight switch is in the or
* position
*: When the surroundings are bright
The daytime running lights remain on after
they illuminate, even if the parking brake is
set again.
OFor the U.S.A.: Daytime running lights
can be turned off by operating the head-
light switch to position.
OCompared to turning on the headlights,
the daytime running light system offers
greater durability and consumes less
electricity, so it can help improve fuel
economy.
QHeadlight control sensor
The sensor may not function properly if an
object is placed on the sensor, or anything
that blocks the sensor is affixed to the wind-
shield.
Doing so interferes with the sensor detect-
ing the level of ambient light and may cause
the automatic headlight system to malfunc-
tion.
Headlight switch
The headlights can be operated
manually or automatically.
Turning on the headlights
A
B

1824-5. Using the driving support systems
The system can detect the following
(The detectable objects differs
depending on the function.):
Vehicles
 Bicyclists
 Pedestrians
QPre-collision warning
When the system determines that the
possibility of a frontal collision is high, a
buzzer will sound and a warning mes- sage will be displayed on the multi-
information display to urge the driver
to take evasive action.
QPre-collision brake assist
When the system determines that the
possibility of a frontal collision is high,
the system applies greater braking
force in relation to how strongly the
brake pedal is depressed.
QPre-collision braking
If the system determines that the possi-
bility of a frontal collision is extremely
high, the brakes are automatically
applied to help avoid the collision or
reduce the impact of the collision.
QEmergency steering assist
If the system determines that the possi-
bility of a frontal collision is high and
that there is sufficient space for the
vehicle to be steered into within its
lane, and the driver has begun evasive
maneuver or steering, emergency
steering assist will assist the steering
movements to help enhance the vehi-
cle stability and for lane departure pre-
vention. During operation, the
indicator will illuminate in green.
PCS (Pre-Collision System)
The pre-collision system uses a
radar sensor and front camera to
detect objects ( P.182) in front of
the vehicle. When the system
determines that the possibility of a
frontal collision with an object is
high, a warning operates to urge
the driver to take evasive action
and the potential br ake pressure is
increased to help the driver avoid
the collision. If the system deter-
mines that the possibility of a frontal
collision with an object is extremely
high, the brakes are automatically
applied to help avoid the collision or
help reduce the impact of the colli-
sion.
The pre-collision system can be dis-
abled/enabled and the warning tim-
ing can be changed. ( P.185)
Detectable objects
System functions

1914-5. Using the driving support systems
4
Driving
bicycle ridden by more than one person,
or a uniquely shaped bicycle (bicycle with
a child seat, tandem bicycle, etc.)
• If a pedestrian/or the riding height of a bicyclist ahead is shorter than approxi-
mately 3.2 ft. (1 m) or taller than approxi-
mately 6.5 ft. (2 m)
• If a pedestrian/bicyclist is wearing over- sized clothing (a rain coat, long skirt,
etc.), making their silhouette obscure
• If a pedestrian is bending forward or squatting or bicyclist is bending forward
• If a pedestrian/bicyclist is moving fast
• If a pedestrian is pushing a stroller, wheelchair, bicycle or other vehicle
• When driving in incl ement weather such
as heavy rain, fog, snow or a sandstorm
• When driving through steam or smoke
• When the surrounding area is dim, such as at dawn or dusk, or while at night or in
a tunnel, making a detectable object
appear to be nearly the same color as its
surroundings
• When driving in a place where the sur-
rounding brightness changes suddenly,
such as at the entrance or exit of a tunnel
• After the hybrid system has started the
vehicle has not been driven for a certain
amount of time
• While making a left/right turn and for a
few seconds after making a left/right turn
• While driving on a curve and for a few seconds after driving on a curve
• If your vehicle is skidding
• If the front of the vehicle is raised or low- ered
• If the wheels are misaligned
• If a wiper blade is blocking the front cam- era
• The vehicle is being driven at extremely
high speeds
• When driving on a hill
• If the radar sensor or front camera is mis-
aligned • When driving in a traffic lane separated
by more than one lane where oncoming
vehicles are driving while making a
right/left turn
• When largely out of place with the oppo- site facing targeted oncoming vehicle
during a right/left turn
• While making a right/left turn, when a pedestrian approaches from behind or
side of your vehicle
OIn addition to the above, in some situa-
tions, such as the following, the emer-
gency steering assist may not operate.
• When the white (yellow) lane lines are difficult to see, such as when they are
faint, diverging/merging, or a shadow is
cast upon them
• When the lane is wider or narrower than normal
• When there is a light and dark pattern on the road surface, such as due to road
repairs
• When the target is too close
• When there is insufficient safe or unob- structed space for the vehicle to be
steered into
• If oncoming vehicle is present
• If VSC function is operating
OIn some situations such as the following,
sufficient braking force or steering force
may not be obtained, preventing the sys-
tem from performing properly:
• If the braking functions cannot operate to their full extent, such as when the brake

2124-5. Using the driving support systems
P.210
QDynamic radar cruise control with full-
speed range can be set when
OThe shift lever is in D.
OThe desired set speed can be set when
the vehicle speed is approximately 20
mph (30 km/h) or more. (However,
when the vehicle speed is set while driv-
ing at below approximately 20 mph [30
km/h], the set speed will be set to
approximately 20 mph [30 km/h].)
QAccelerating 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.
QWhen the vehicle stops while follow-up
cruising
OPressing 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.
OIf the vehicle ahead starts off within 3 sec-
onds after your vehicle stops, follow-up
cruising will be resumed.
QAutomatic cancelation of vehicle-to-
vehicle distance control mode
Vehicle-to-vehicle distance control mode is
automatically canceled in the following situ-
ations.
OVSC is activated.
OTRAC is activated for a period of time.
OWhen the VSC or TRAC system is
turned off.
OThe sensor cannot detect correctly
because it is covered in some way.
OWhen the brake control or output
restriction control of a driving support
system operates. (For example: Pre-Col-
lision System, Drive-Start Control)
OThe parking brake is operated.
OThe vehicle is stopped by system control
on a steep incline.
OThe 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 reasons
other than the above, there may be a mal-
function in the system. Contact your Lexus
dealer.
QAutomatic cancelation of constant
speed control mode
Constant speed control mode is automati-
cally canceled in the following situations:
OActual vehicle speed is more than
approximately 10 mph (16 km/h) below
the set vehicle speed.
OActual vehicle speed falls below approxi-
mately 20 mph (30 km/h).
OVSC is activated.
OTRAC is activated for a period of time.
OWhen the VSC or TRAC system is
turned off.
OWhen the brake control or output
restriction control of a driving support
system operates. (For example: Pre-Col-
lision System, Drive-Start Control)
OThe parking brake is operated.
If constant speed control mode is automati-
cally canceled for any reasons other than
the above, there may be a malfunction in
the system. Contact your Lexus dealer.

2134-5. Using the driving support systems
4
Driving
QSituations in which the curve speed
reduction function may not operate
In situations such as the following, the curve
speed reduction function may not operate:
OWhen the vehicle is being driven around
a gentle curve.
OWhen the accelerator pedal is being
depressed.
OWhen the vehicle is being driven around
an extremely short curve.
QBrake operation
A brake operation sound may be heard and
the brake pedal response may change, but
these are not malfunctions.
QWarning 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 displa y, read the message
and follow the instructions. ( P.180, 374)
QWhen 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.210) may not be activated.
OVehicles that cut in suddenly
OVehicles traveling at low speeds
OVehicles that are not moving in the same
lane
OVehicles with small rear ends (trailers
with no load on board, etc.)
OMotorcycles traveling in the same lane
OWhen water or snow thrown up by the
surrounding vehicles hinders the detect-
ing of the sensor
OWhen your vehicle is pointing upwards
(caused by a heavy load in the luggage
compartment, etc.)
OPreceding vehicle has an extremely high
ground clearance
QConditions under wh ich 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.
OWhen the road curves or when the lanes
are narrow
OWhen steering wheel operation or your
position in the lane is unstable

2254-5. Using the driving support systems
4
Driving
QIf “Parking Assist Unavailable” is dis-
played on the multi-information display
OWater may be continuously flowing over
the sensor surface, such as in a heavy
rain. When the system determines that it
is normal, the system will return to nor-
mal.
OInitialization may not have been per-
formed after a 12-volt battery terminal
was disconnected and reconnected. Ini-
tialize the system. (P.225)
If this message continues to be displayed
even after initialization, have the vehicle
inspected by your Lexus dealer.
QIf a 12-volt battery terminal has been
disconnected 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 22 mph (35 km/h) 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.
QSensor detection information
OThe sensor’s detection areas are limited
to the areas around the vehicle’s front
and rear bumpers.
OThe 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.
• 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
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.
QObjects 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:
OWires, fences, ropes, etc.
OCotton, snow and other materials that
absorb sound waves
OSharply-angled objects
OLow objects
OTall 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.
QSituations 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.
OThere is dirt, snow or ice on a sensor.
(Cleaning the sensors will resolve this
problem.)
OA 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.
OWhen a sensor or the area around a sen-
sor is extremely hot or cold.
OOn an extremely bumpy road, on an
incline, on gravel, or on grass.
OWhen 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.
OA sensor is coated with a sheet of spray
or heavy rain.
OIf objects draw too close to the sensor.
OWhen a pedestrian is wearing clothing

2264-5. Using the driving support systems
that does not reflect ultrasonic waves (ex.
skirts with gathers or frills).
OWhen objects that are not perpendicular
to the ground, not perpendicular to the
vehicle traveling direction, uneven, or
waving are in the detection range.
OStrong wind is blowing.
OWhen driving in inclement weather such
as fog, snow or a sandstorm.
OWhen an object that cannot be detected
is between the vehicle and a detected
object.
OIf 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.
OIf the orientation of a sensor has been
changed due to a collision or other
impact.
OWhen 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.
OIf the front of the vehicle is raised or low-
ered due to the carried load.
OIf the vehicle cannot be driven in a stable
manner, such as when the vehicle has
been in an accident or is malfunctioning.
OWhen tire chains, a compact spare tire or
an emergency tire puncture repair kit are
used.
QSituations 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.
OWhen driving on a narrow road.
OWhen driving toward a banner, flag, low- hanging branch or boom barrier (such as
those used at railroad crossings, toll
gates and parking lots).
OWhen there is a rut or hole in the surface
of the road.
OWhen driving on a metal cover (grating),
such as those used for drainage ditches.
OWhen driving up or down a steep slope.
OIf a sensor is hit by a large amount of
water, such as when driving on a flooded
road.
OThere is dirt, snow, water drops or ice on
a sensor. (Cleaning the sensors will
resolve this problem.)
OA sensor is coated with a sheet of spray
or heavy rain.
OWhen driving in inclement weather such
as fog, snow or a sandstorm.
OWhen strong winds are blowing.
OWhen 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.
OIf the front of the vehicle is raised or low-
ered due to the carried load.
OIf the orientation of a sensor has been
changed due to a collision or other
impact.
OThe vehicle is approaching a tall or
curved curb.
ODriving close to columns (H-shaped steel
beams, etc.) in multi-story parking
garages, construction sites, etc.
OIf the vehicle cannot be driven in a stable
manner, such as when the vehicle has
been in an accident or is malfunctioning.
OOn an extremely bumpy road, on an
incline, on gravel, or on grass.