tires LEXUS ES300h 2022 User Guide

1954-5. Using the driving support systems
4
Driving
QLane departure alert function
When the system determines that the
vehicle might depart from its lane or
course
*, a warning is displayed on the
multi-information display, and either a
warning buzzer will sound or the steer-
ing wheel will vibrate to alert the driver.
When the warning buzzer sounds or the
steering wheel vibrates, check the area
around your vehicle and carefully operate
the steering wheel to move the vehicle
back to the center of the lane.
When the system determines that the vehi-
cle might depart from its lane and that the
possibility of a collision with an overtaking
vehicle in the adjacent lane is high, the lane
departure alert will operate even if the turn
signals are operating.
*: Boundary between asphalt and the side of the road, such as grass, soil, or a curb
WARNING
OLight from the headlights of an oncom-
ing vehicle, the sun, etc. enters the
camera.
OThe vehicle is driven on a slope.
OThe vehicle is driven on a road which
tilts left or right, or a winding road.
OThe vehicle is driven on an unpaved or
rough road.
OThe traffic lane is excessively narrow
or wide.
OThe vehicle is extremely tilted due to
carrying heavy luggage or having
improper tire pressure.
OThe distance to the preceding vehicle
is extremely short.
OThe vehicle is moving up and down a
large amount due to road conditions
during driving (poor roads or road
seams).
OWhen driving in a tunnel or at night
with the headlights off or when a head-
light is dim due to its lens being dirty or
it being misaligned.
OThe vehicle is struck by a crosswind.
OThe vehicle is affected by wind from a
vehicle driven in a nearby lane.
OThe vehicle has just changed lanes or
crossed an intersection.
OTires which differ by structure, manu-
facturer, brand or tread pattern are
used.
OWhen tires of a size other than speci-
fied are installed.
OSnow tires, etc. are equipped.
OThe vehicle is being driven at
extremely high speeds.
Functions included in LTA sys-
tem

2184-5. Using the driving support systems
QConditions under which the system may
not function correctly
OThe 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
vehicle 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) or towing eyelet is installed to the
rear of the vehicle
• 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
OInstances 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) or towing eyelet is installed to the
rear of the vehicle

2244-5. Using the driving support systems
and turn it on. If the system is dis-
abled, it will remain off even if the
power switch is turned to ON mode
after the power switch has been turned
off.
QThe system can be operated when
OThe power switch is in ON mode.
OIntuitive parking assist function is on.
OThe vehicle speed is less than about 6
mph (10 km/h).
OA shift lever is shifted to a position other
than P.
QSetting the buzzer volume
The buzzer volume can be adjusted on the
multi-information display. ( P.222)
QIf “Parking Assist Unavailable Clean
Parking Assist Sensor” is displayed on
the multi-information display
A sensor may be covered with ice, snow,
dirt, etc. Remove the ice, snow, dirt, etc.,
from the sensor to return the system to nor-
mal.
Also, due to ice forming on a sensor at low
temperatures, a warning message may be
displayed or the sensor may not be able to
detect an object. Once the ice melts, the
system will return to normal.
WARNING
QCautions regarding the use of the
system
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’s surroundings and driving
safely.
QTo 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.
ODo not damage the sensors, and
always keep them clean.
ODo 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.
ODo not subject the surrounding area of
the sensor to a strong impact. If sub-
jected to an impact, have the vehicle
inspected by your Lexus dealer. If the
front or rear bumper needs to be
removed/installed or replaced, con-
tact your Lexus dealer.
ODo not modify, disassemble or paint
the sensors.
ODo not attach a license plate cover.
OKeep your tires properly inflated.
QWhen to disable the function
In the following situations, disable the
function as it may operate even though
there is no possibility of a collision.
OFailing to observe the warnings above.
OA non-genuine Lexus suspension
(lowered suspension, etc.) is installed.
QNotes when washing the vehicle
Do not apply intensive bursts of water or
steam to the sensor area. Doing so may
result in the sensor malfunctioning.
OWhen 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.
OWhen using steam to clean the vehi-
cle, do not direct steam too close to
the sensors as doing so may cause a
sensor to malfunction.

2344-5. Using the driving support systems
weather, such as heavy rain, snow, or fog.
OWhen multiple vehicles are approaching
with only a small gap between each vehi-
cle.
OWhen a vehicle is approaching at high
speed.
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.
OWhen backing up on a slope with a sharp
change in grade.
OWhen backing out of a sharp angle park-
ing spot.
OWhen towing a trailer.
OWhen there is a significant difference in
height between your vehicle and the
vehicle that enters the detection area.
OWhen a sensor or the area around a sen-
sor is extremely hot or cold.
OIf the suspension has been modified or
tires of a size other than specified are
installed.
OIf the front of the vehicle is raised or low-ered due to the carried load.
OWhen turning while backing up.
OWhen a vehicle turns into the detection
area.
QSituations in which the system may
operate even if there is no possibility of a
collision
Instances of the RCTA function unneces-
sarily detecting a vehicle and/or object may
increase in the following situations:
OWhen the parking space faces a street
and vehicles are being driven on the
street.
OWhen the distance between your vehicle
and metal objects, such as a guardrail,
wall, sign, or parked vehicle, which may
reflect electrical waves toward the rear of
the vehicle, is short.

2354-5. Using the driving support systems
4
Driving
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.
OWhen a vehicle passes by the side of your
vehicle.
OWhen a detected vehicle turns while
approaching the vehicle.
OWhen there are spinning objects near
your vehicle such as the fan of an air con-
ditioning unit.
OWhen water is splashed or sprayed
toward the rear bumper, such as from a
sprinkler.
OMoving objects (flags, exhaust fumes,
large rain droplets or snowflakes, rain
water on the road surface, etc.).
OWhen the distance between your vehicle
and a guardrail, wall, etc., that enters the
detection area is short.
OGratings and gutters.
OWhen a sensor or the area around a sen-
sor is extremely hot or cold.
OIf the suspension has been modified or
tires of a size other than specified are
installed.
OIf the front of the vehicle is raised or low-
ered due to the carried load.

2404-5. Using the driving support systems
QParking Support Brake function
(rear pedestrians) (if equipped)
A rear camera sensor is used to detect
pedestrians in the detection area
behind the vehicle when backing up.
(  P.251)
WARNING
QCautions regarding the use of the
system
Do not overly rely on the system, as
doing so may lead to an accident.
Always drive while checking the safety of
the surroundings of the vehicle.
Depending on the vehicle and road con-
ditions, weather, etc., the system may not
operate.
The detection capabilities of sensors and
radars are limited. Always drive while
checking the safety of the surroundings
of the vehicle.
OThe driver is solely responsible for safe
driving. Always drive carefully, taking
care to observe your surroundings.
The Parking Support Brake system is
designed to provide support to lessen
the severity of collisions. However, it
may not operate in some situations.
OThe Parking Support Brake system is
not designed to stop the vehicle com-
pletely. Additionally, even if the system
has stopped the vehicle, it is necessary
to depress the brake pedal immedi-
ately as brake control will be canceled
after approximately 2 seconds.
OIt is extremely dangerous to check the
system operations by intentionally
driving the vehicle in to the direction of
a wall, etc. Never attempt such actions.
QWhen to disable the Parking Support
Brake
In the following situations, disable the
Parking Support Brake as the system
may operate even though there is no
possibility of a collision.
OWhen inspecting the vehicle using a
chassis roller, chassis dynamo or free
roller.
OWhen loading the vehicle onto a boat,
truck or other transport vessel.
OIf the suspension has been modified or
tires of a size other than specified are
installed.
OIf the front of the vehicle is raised or
lowered due to the carried load.
OWhen equipment that may obstruct a
sensor is installed, such as a towing
eyelet, bumper protector (an addi-
tional trim strip, etc.), bicycle carrier,
or snow plow.
OWhen using automatic car washing
devices.
OIf the vehicle cannot be driven in a sta-
ble manner, such as when the vehicle
has been in an accident or is malfunc-
tioning.
OWhen the vehicle is driven in a sporty
manner or off-road.
OWhen the tires are not properly
inflated.
OWhen the tires are very worn.
OWhen tire chains, a compact spare tire
or an emergency tire puncture repair
kit are used.

2564-5. Using the driving support systems
WARNING
QThe ABS does not operate effectively
when
OThe limits of tire gripping performance
have been exceeded (such as exces-
sively worn tires on a snow covered
road).
OThe vehicle hydroplanes while driving
at high speed on wet or slick roads.
QStopping distance when the ABS is
operating may exceed that of normal
conditions
The ABS is not designed to shorten the
vehicle’s stopping distance. Always
maintain a safe distance from the vehicle
in front of you, especially in the following
situations:
OWhen driving on dirt, gravel or snow-
covered roads
OWhen driving with tire chains
OWhen driving over bumps in the road
OWhen driving over roads with pot-
holes or uneven surfaces
QTRAC/VSC may not operate effec-
tively when
Directional control and power may not
be achievable while driving on slippery
road surfaces, even if the TRAC/VSC
system is operating.
Drive the vehicle carefully in conditions
where stability and power may be lost.
QActive Cornering Assist does not
operate effectively when
ODo not overly rely on Active Corner-
ing Assist. Active Cornering Assist
may not operate effectively when
accelerating down slopes or driving on
slippery road surfaces.
OWhen Active Cornering Assist fre-
quently operates, Active Cornering
Assist may temporarily stop operating
to ensure proper operation of the
brakes, TRAC and VSC.
QHill-start assist control does not oper-
ate effectively when
ODo not overly rely on hill-start assist
control. Hill-start assist control may
not operate effectively on steep
inclines and roads covered with ice.
OUnlike the parking brake, hill-start
assist control is not intended to hold
the vehicle stationary for an extended
period of time. Do not attempt to use
hill-start assist control to hold the vehi-
cle on an incline, as doing so may lead
to an accident.
QWhen the TRAC/ABS/VSC is acti-
vated
The slip indicator light flashes. Always
drive carefully. Reckless driving may
cause an accident. Exercise particular
care when the indicator light flashes.
QWhen the TRAC/VSC systems are
turned off
Be especially careful and drive at a
speed appropriate to the road condi-
tions. As these are the systems to help
ensure vehicle stability and driving force,
do not turn the TRAC/VSC systems off
unless necessary.
QSecondary Collision Brake
Do not rely solely upon the Secondary
Collision Brake. This system is designed
to help reduce the possibility of further
damage due to a secondary collision,
however, that effect changes according
to various conditions. Overly relying on
the system may result in death or serious
injury.

2574-5. Using the driving support systems
4
Driving
WARNING
QReplacing tires
Make sure that all tires are of the speci-
fied size, brand, tread pattern and total
load capacity. In addition, make sure that
the tires are inflated to the recom-
mended tire inflat ion pressure level.
The ABS, TRAC and VSC systems will
not function correctly if different tires are
installed on the vehicle.
Contact your Lexus dealer for further
information when replacing tires or
wheels.
QHandling of tires and the suspension
Using tires with any kind of problem or
modifying the suspension will affect the
driving assist systems, and may cause a
system to malfunction.

2594-6. Driving tips
4
Driving
Control and maintain the vehicle at a
constant speed. Before stopping at a
toll booth or similar, allow plenty of
time to release the accelerator and
gently apply the brakes. A greater
amount of electrical energy can be
regenerated when slowing down.
Use the air conditioning only when
necessary. Doing so can help reduce
excessive gasoline consumption.
In summer: When the ambient tem-
perature is high, use the recirculated
air mode. Doing so will help to reduce
the burden on the air conditioning sys-
tem and reduce fuel consumption as
well.
In winter: Because the gasoline engine
will not automatically cut out until it and
the interior of the vehicle are warm, it
will consume fuel. Also, fuel consump-
tion can be improved by avoiding
overuse of the heater.
Make sure to check the tire inflation
pressure frequently. Improper tire
inflation pressure can cause poor fuel
economy.
Also, as snow tires can cause large
amounts of friction, their use on dry
roads can lead to poor fuel economy.
Use tires that are appropriate for the
season.Carrying heavy luggage will lead to
poor fuel economy. Avoid carrying
unnecessary luggage. Installing a large
roof rack will also cause poor fuel
economy.
Since the gasoline engine starts up and
cuts out automatically when cold,
warming up the engine is unnecessary.
Moreover, frequently driving short dis-
tances will cause the engine to repeat-
edly warm up, which can lead to excess
fuel consumption.
Highway driving
Air conditioning
Checking tire inflation pressure
Luggage
Warming up before driving

2604-6. Driving tips
Use fluids that are appropriate to
the prevailing outside temperatures.
•Engine oil
• Engine coolant/power control unit cool-
ant
•Washer fluid
 Have a service technician inspect
the condition of the 12-volt battery.
 Have the vehicle fitted with four
snow tires or purchase a set of tire
chains for the front tires.
*
Ensure that all tires are the specified size
and brand, and that chains match the size
of the tires.
*: Tire chains cannot be mounted on vehi-
cles with 18-inch/19-inch tires.
Perform the following according to the
driving conditions:
 Do not try to forcibly open a window
Winter driving tips
Carry out the necessary prepara-
tions and inspection s before driving
the vehicle in winter. Always drive
the vehicle in a manner appropriate
to the prevailing weather condi-
tions.
Preparation for winter
WARNING
QDriving with snow tires
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in a loss of
vehicle control and cause death or seri-
ous injury.
OUse tires of the specified size.
OMaintain the recommended level of air
pressure.
ODo not drive in excess of 75 mph (120
km/h), regardless of the type of snow
tires being used.
OUse snow tires on all, not just some
wheels.
QDriving with tire chains (vehicles with
17-inch tires)
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in the vehicle
being unable to be driven safely, and may
cause death or serious injury.
ODo not drive in excess of the speed
limit specified for the tire chains being
used, or 30 mph (50 km/h), which-
ever is lower.
OAvoid driving on bumpy road surfaces
or over potholes.
OAvoid sudden acceleration, abrupt
steering, sudden braking and shifting
operations that cause sudden engine
braking.
OSlow down sufficiently before entering
a curve to ensure that vehicle control
is maintained.
ODo not use LTA (Lane Tracing Assist)
system.
NOTICE
QRepairing or replacing snow tires
Request repairs or replacement of snow
tires from Lexus dealers or legitimate tire
retailers.
This is because the removal and attach-
ment of snow tires affects the operation
of the tire pressure warning valves and
transmitters.
Before driving the vehicle