sensor LEXUS RC300 2020 User Guide

1394-3. Operating the lights and wipers
4
Driving
■Cornering lights
When the cornering lights are on for more
than 30 minutes, they will turn off automati-
cally.
1Push the lever away from you with
the headlight switch in the or
position.
2
Press the Automatic High Beam
switch.
The Automatic High Beam indicator will
Automatic High Beam
The Automatic High Beam uses a
camera sensor located behind the
upper portion of the windshield to
assess the brightness of the lights of
vehicles ahead, streetlights, etc.,
and automatically turns the high
beams on or off as necessary.
WARNING
■Limitations of the Automatic High
Beam
Do not overly rely on the Automatic High
Beam. Always drive safely, taking care to
observe your surroundings and turning
the high beams on or off manually if nec-
essary.
■To prevent incorrect operation of the
Automatic High Beam system
Do not overload the vehicle.
Activating the Automatic High
Beam

1404-3. Operating the lights and wipers
come on when the system is operating.
■Conditions to turn the high beams on/off
automatically
●When all of the following conditions are
met, the high beams will be turned on
automatically (after approximately 1 sec-
ond):
• The vehicle speed is approximately 21 mph (34 km/h) or more.
• The area ahead of the vehicle is dark.
• There are no vehicles ahead with head- lights or tail lights turned on.
• There are few streetlights on the road ahead.
●If any of the following conditions is met,
the high beams will turn off automatically:
• The vehicle speed is below approxi-
mately 17 mph (27 km/h).
• The area ahead of the vehicle is not dark.
• Vehicles ahead have their headlights or tail lights turned on.
• There are many streetlights on the road ahead.
■Camera sensor detection information
●The high beams may not be automatically
turned off in the following situations:
• When a vehicle suddenly appears from around a curve
• When the vehicle is cut in front of by
another vehicle
• When vehicles ahead cannot be detected due to repe ated curves, road
dividers or roadside trees
• When vehicles ahead appear in a far- away lane on a wide road
• When the lights of vehicles ahead are not
on
●The high beams may be turned off if a
vehicle ahead that is using fog lights with- out its headlights turned on is detected.
●House lights, street lig
hts, traffic signals,
and illuminated billboards or signs and
other reflective objects may cause the
high beams to change to the low beams,
or the low beams to remain on.
●The following factors may affect the
amount of time taken for the high beams
to turn on or off:
• The brightness of the headlights, fog
lights, and tail lights of vehicles ahead
• The movement and direction of vehicles ahead
• When a vehicle ahead only has opera- tional lights on one side
• When a vehicle ahead is a two-wheeled
vehicle
• The condition of the road (gradient, curve, condition of th e road surface, etc.)
• The number of passengers and amount of luggage in the vehicle
●The high beams may turn on or off unex-
pectedly.
●Bicycles or similar vehicles may not be
detected.
●In the following situations the system may
not be able to correctly detect the sur-
rounding brightness level. This may cause
the low beams to remain on or the high
beams to flash or dazzle pedestrians or
vehicles ahead. In such a case, it is neces-
sary to manually swit ch between the high
and low beams.
• When driving in inclement weather
(heavy rain, snow, fo g, sandstorms, etc.)
• When the windshield is obscured by fog, mist, ice, dirt, etc.
• When the windshield is cracked or dam- aged
• When the camera sensor is deformed or
dirty
• When the temperature of the camera sensor is extremely high
• When the surrounding brightness level is equal to that of headlights, tail lights or
fog lights
• When headlights or tail lights of vehicles
ahead are turned off, dirty, changing
color, or not aimed properly
• When the vehicle is hit by water, snow,
dust, etc. from a preceding vehicle
• When driving through an area of inter-

1414-3. Operating the lights and wipers
4
Driving
mittently changing brightness and dark-
ness
• When frequently and repeatedly driving
ascending/descending roads, or roads
with rough, bumpy or uneven surfaces
(such as stone-paved ro ads, gravel roads,
etc.)
• When frequently and repeatedly taking curves or driving on a winding road
• When there is a highly reflective object ahead of the vehicle, such as a sign or
mirror
• When the back of a preceding vehicle is highly reflective, such as a container on a
truck
• When the vehicle’s headlights are dam- aged or dirty, or are not aimed properly
• When the vehicle is listing or titling due to
a flat tire, a trailer being towed, etc.
• When the headlights are changed between the high beams and low beams
repeatedly in an abnormal manner
• When the driver believes that the high beams may be flashing or dazzling
pedestrians or other drivers
■Temporarily lowering sensor sensitivity
The sensitivity of the sensor can be tempo-
rarily lowered.
1 Turn the engine switch off while the fol-
lowing conditions are met.
●The headlight switch is in or .
●The headlight sw itch lever is in high beam
position.
●Automatic High Beam switch is on.
2 Turn the engine switch to IGNITION
ON mode.
3 Within 30 seconds after 2, repeat pull-
ing the headlight switch lever to the
original position then pushing it to the
high beam position quickly 10 times,
then leave the lever in high beam posi-
tion.
4 If the sensitivity is changed, the Auto-
matic High Beam indicator is turn on
and off 3 times.
Automatic High Beam (headlights) may
turn on even when the vehicle is stopped.
■Switching to the low beams
Pull the lever to its original position.
The Automatic High Beam indicator will
turn off.
Push the lever away from you to activate
the Automatic High Beam system again.
■Switching to the high beams
Press the Automatic High Beam
switch.
The Automatic High Beam indicator will
turn off and the high beam indicator will
turn on.
Press the switch to activate the Automatic
High Beam system again.
Turning the high beams on/off
manually

1444-3. Operating the lights and wipers
Move the lever up by 2 levels
2 Move the lever up by 1 level
3 (U.S.A.) or (Canada)
Move the lever down by 1 level
4 (U.S.A.) or (Canada)
Move the lever down by 2 levels
5 AUTO mode on/off switch
With AUTO mode selected, the wipers will
operate automatically when the sensor
detects falling rain. The system automati-
cally adjusts wiper timing in accordance
with rain volume and vehicle speed.
The AUTO mode indicator will turn on
when AUTO mode is selected.
Depending on the operating state of
the wipers when the wiper lever is
operated, the wipers will operate as
follows.
• Current wiper operation: Off
• Current wiper operation: Low
speed operation • Current wiper operation: High
speed operation
• Current wiper operation: AUTO mode (Intermittent operation)
• Current wiper operation: AUTO mode (Continuously)
Wiper lever oper- ationWiper operation
or Temporary operation
Temporary operation
or Low speed operation
or High speed operation
Wiper lever oper-ationWiper operation
or Off
Off
A
or High speed operation
or High speed operation
Wiper lever oper- ationWiper operation
or Off
Low speed operation
or No change
or No change
Wiper lever oper-ationWiper operation
or Off
Temporary opera-
tion
*1
or Low speed opera-tion
*2
or High speed opera-
tion
*2
Wiper lever oper- ationWiper operation
or Off
No change
Wiper lever oper-ationWiper operation

1454-3. Operating the lights and wipers
4
Driving
*1: After temporary operation, the mode will return to AUTO mode.
*2: AUTO mode will be canceled.
When AUTO mode is selected, the
sensor sensitivity can be adjusted by
turning the switch ring.
6 Increases the sensitivity
7 Decreases the sensitivity
8 Washer/wiper dual opera-
tion
Pulling the lever operates the wipers and
washer.
The wipers will automatically operate a
couple of times afte r the washer squirts. Vehicles with headlight cleaners: When the
engine switch is in IGNITION ON mode
and the headlights are
on, if the lever is
pulled, the headlight cleaners will operate
once. After this, the he adlight cleaners will
operate every 5th time the lever is pulled.
The wipers can be used as intermittent
windshield wipers, which operate
regardless of vehicle speed or amount
of raindrops. The intermittent wind-
shield wiper operation can be switched
when the vehicle is stopped and the
wiper is off. The wiper operation can-
not be switched during AUTO mode
or while the intermittent windshield
wipers are operating.
Press and hold until the AUTO
mode indicator stops flashing.
If is pressed and held until the AUTO
mode indicator stops flashing again, it will
return to its previous state.
The wiper can be switched when the vehi-
cle is stopped and the wipers are off.
or Low speed opera-
tion
*2
or High speed opera- tion
*2
Wiper lever oper- ationWiper operation
Switching between the intermit-
tent windshield wipers and
rain-sensing windshield wipers
(vehicles with rain-sensing wind-
shield wipers)

1474-3. Operating the lights and wipers
4
Driving
Wiper intervals can be adjusted when
intermittent operation is selected.
5Increases the intermittent wind-
shield wiper frequency
6 Decreases the intermittent wind-
shield wiper frequency
7 Washer/wiper dual opera-
tion
Pulling the lever operates the wipers and
washer.
The wipers will automatically operate a
couple of times afte r the washer squirts.
Vehicles with headlight cleaners: When the
engine switch is in IGNITION ON mode
and the headlights are on, if the lever is
pulled, the headlight cleaners will operate once. After this, the he
adlight cleaners will
operate every 5th time the lever is pulled.
■The windshield wiper and washer can be
operated when
The engine switch is in IGNITION ON
mode.
■Dripping prevention wiper sweep
After performing a washing and wiping
operation several times, the wipers operate
one more time after a short delay to prevent
dripping.
However, this final wiper operation will not
be performed while driving.
■Effects of vehicle speed on wiper opera-
tion (vehicles with rain-sensing wind-
shield wipers)
Vehicle speed affects the following even
when the wipers are not in AUTO mode.
●Intermittent wiper interval
●Wiper operation when the washer is
being used (delay un til drip prevention
wiper sweep occurs)
With low speed wind shield wiper opera-
tion selected, wiper operation will be
switched from low sp eed to intermittent
wiper operation only when the vehicle is
stationary.
■Raindrop sensor (vehicles with
rain-sensing wind shield wipers)
●The raindrop sensor judges the amount
of raindrops.
An optical sensor is adopted. It may not
operate properly when sunlight from the
rising or setting of the sun intermittently
strikes the windshield, or if bugs etc. are
present on the windshield.
●If the wiper is turned to AUTO mode
while the engine swit ch is in IGNITION
or No change
or No change
Wiper lever oper-
ationWiper operation

1484-3. Operating the lights and wipers
ON mode, the wipers will operate once
to show that AUTO mode is activated.
●If the temperature of the raindrop sensor
is 185°F (85°C) or higher, or -22°F
(-30°C) or lower, automatic operation
may not occur. In this case, operate the
wipers in any mode other than AUTO
mode.
■When the windshield wipers are in tem-
porary operation (vehicles with
rain-sensing windshield wipers)
AUTO mode cannot be activated even if is pressed.
■If no windshield washer fluid sprays
Check that the washer nozzles are not
blocked if there is washer fluid in the wind-
shield washer fluid reservoir.
WARNING
■Caution regarding the use of wind-
shield wipers in AUTO mode
The windshield wipers may operate
unexpectedly if the sensor is touched or
the windshield is subject to vibration in
AUTO mode. Take care that your fingers
or anything else do not become caught
in the windshield wipers.
■Caution regarding the use of washer
fluid
When it is cold, do not use the washer
fluid until the windshield becomes warm.
The fluid may freeze on the windshield
and cause low visibility. This may lead to
an accident, resulting in death or serious
injury.
NOTICE
■When there is no washer fluid spray
from the nozzle
Damage to the washer fluid pump may
be caused if the lever is pulled toward
you and held continually.
■When a nozzle becomes blocked
In this case, contact your Lexus dealer.
Do not try to clear it with a pin or other
object. The nozzle will be damaged.

1524-5. Using the driving support systems
4-5.Using the driving support systems
■PCS (Pre-Collision System)
 P.156
■LDA (Lane Departure Alert with
steering control)
 P.163
■Automatic High Beam
 P.139
■Dynamic radar cruise control
 P.170
Two types of sensors, located behind
the front grille and windshield, detect
information necessary to operate the drive assist systems.
Radar sensor
Front camera
Lexus Safety System +
The Lexus Safety Sy stem + consists
of the following drive assist systems
and contributes to a safe and com-
fortable driving experience:
Driving assist system
WARNING
■Lexus Safety System +
The Lexus Safety System + is designed to
operate under the assumption that the
driver will drive safely, and is designed to
help reduce the impact to the occupants
and the vehicle in the case of a collision
or assist the driver in normal driving con-
ditions.
As there is a limit to the degree of recog-
nition 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 surro undings and driving
safely.
Sensors
WARNING
■To avoid malfunction of the radar sen-
sor
Observe the following precautions.
Otherwise, the radar sensor may not
operate properly, possibly leading to an
accident resulting in death or serious
injury.
●Keep the radar sensor and the radar
sensor cover clean at all times.
Radar sensor
Radar sensor cover
If the front of the rada r sensor or the front
or back of the radar sensor cover is dirty
or covered with water droplets, snow,
etc., clean it.
Clean the radar sensor and radar sensor
cover with a soft cloth to avoid damaging
them.
A
B
A
B

1534-5. Using the driving support systems
4
Driving
WARNING
●Do not attach accessories, stickers
(including transparent stickers) or
other items to the radar sensor, radar
sensor cover or surrounding area.
●Do not subject the radar sensor or its
surrounding area to a strong impact.
If the radar sensor, front grille, or front
bumper has been subjected to a
strong impact, have the vehicle
inspected by your Lexus dealer.
●Do not disassemble the radar sensor.
●Do not modify or paint the radar sen-
sor or radar sensor cover.
●In the following cases, the radar sensor
must be recalibrated. Contact your
Lexus dealer for details.
• When the radar sensor or front grille are removed and installed, or replaced
• When the front bumper is replaced
■To avoid malfunction of the front cam-
era
Observe the following precautions.
Otherwise, the front camera may not
operate properly, possibly leading to an
accident resulting in death or serious
injury.
●Keep the windshield clean at all times.
• If the windshield is dirty or covered with an oily film, water droplets, snow,
etc., clean the windshield.
• If a glass coating agent is applied to the windshield, it will still be necessary to
use the windshield wipers to remove
water droplets, etc. from the area of
the windshield in front of the front
camera.
• If the inner side of the windshield where the front camera is installed is
dirty, contact your Lexus dealer.
●Do not attach objects, such as stickers,
transparent stickers, etc., to the outer
side of the windshield in front of the
front camera (shaded area in the illus-
tration).
From the top of the windshield to
approximately 0.4 in. (1 cm) below
the bottom of the front camera
Approximately 7.9 in. (20 cm)
(Approximately 4.0 in. [10 cm] to the
right and left from the center of the
front camera)
●If the part of the windshield in front of
the front camera is fogged up or cov-
ered with condensation, or ice, use the
windshield defogger to remove the
fog, condensation, or ice. (
P.211)
●If water droplets cannot be properly
removed from the area of the wind-
shield in front of the front camera by
the windshield wipers, replace the
wiper insert or wiper blade.
●Do not attach window tint to the wind-
shield.
●Replace the windshield if it is damaged
or cracked.
After replacing the windshield, the
front camera must be recalibrated.
Contact your Lexus dealer for details.
●Do not allow liquids to contact the
front camera.
●Do not allow bright lights to shine into
the front camera.
A
B

1554-5. Using the driving support systems
4
Driving
●In the following situations, if the situation has changed (or the vehicle has been driven for
some time) and the normal operating conditions are detected, the message will disappear
and the system will become operational.
If the message does not disappear, contact your Lexus dealer.
• When the temperature around the radar sensor is outside of the operational range, such as when the vehicle is in the sun or in an extremely cold environment
• When the front camera cannot detect objects in front of the vehicle, such as when driving
in the dark, snow, or fog, or when brig ht lights are shining into the front camera
SituationActions
When the area around a sensor is covered
with dirt, moisture (f ogged up, covered with
condensation, ice, etc.), or other foreign
matterTo clean the part of the windshield in front of
the front camera , use the windshield wipers
or the windshield defo gger of the air condi-
tioning system ( P.211).
When the temperature around the front
camera is outside of the operational range,
such as when the vehicle is in the sun or in an
extremely cold environment
If the front camera is hot, such as after the
vehicle had been parked in the sun, use the
air conditioning system to decrease the tem-
perature around the front camera.
If a sunshade was used when the vehicle
was parked, depending on its type, the sun-
light reflected from the surface of the sun-
shade may cause the temperature of the
front camera to become excessively high.
If the front camera is cold, such after the
vehicle is parked in an extremely cold envi-
ronment, use the air conditioning system to
increase the temperature around the front
camera.
The area in front of the front camera is
obstructed, such as when the hood is open
or a sticker is attached to the part of the
windshield in front of the front camera.
Close the hood, remove the sticker, etc. to
clear the obstruction.