2019 LEXUS RCF sensor

2274-3. Operating the lights and wipers
4
Driving
RC F_U ■
Automatic light off system
When the light switch is in , or : The headlights and tail lights turn off 30
seconds after the engine switch is turned to ACCESSORY mode or turned off and a
door is opened and all of the doors and trun k are closed. (The lights turn off immediately
if on the key is pr essed twice after both side doors are closed.)
To turn the lights on again, turn the engine switch to IGNITION ON mode, or turn the
light switch off once and then back to or .
If any of the doors or trunk lid is left open , the lights automatically turn off after 20 min-
utes. ■
Automatic headlight leveling system
The level of the headlights is automatically adjusted accordi ng to the number of passen-
gers and the loading condition of the vehicle to ensure that the headlights do not inter-
fere with other road users. ■
Light reminder buzzer
A buzzer sounds when the engine switch is turned off or turned to ACCESSORY mode
and the driver’s door is opened while the lights are turned on. ■
Customization
Settings (e.g. light sensor se nsitivity) can be changed.
(Customizable features:  P. 569)
NOTICE ■
To prevent battery discharge
Do not leave the lights on longer than ne cessary when the engine is not running.

228 4-3. Operating the lights and wipers
RC F_U Push the lever away from you with
the headlight switch in the or
position.
Press the Automatic High Beam
switch. The Automatic High Beam indicator will
come on when the system is operating.Automatic High Beam The Automatic High Beam uses a came ra sensor located behind the upper
portion of the windshield to assess the brightness of the lights of vehicles
ahead, streetlights, etc., and automatica lly 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 hi gh beams on or off ma nually if necessary.■
To prevent incorrect operation of the Automatic High Beam system
Do not overload the vehicle.
Activating the Automatic High Beam 1
2

230 4-3. Operating the lights and wipers
RC F_U ■
Conditions to turn the high beams on/off automatically●
When all of the following conditions are met, the high beams will be turned on automat-
ically (after approximately 1 second):
• 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 headlights or tail lights turned on.
• There are few streetlights on the road ahead. ●
If any of the following condit ions is met, the high beams will turn off automatically:
• The vehicle speed is below ap proximately 17 mph (27 km/h).
• The area ahead of the vehicle is not dark.
• Vehicles ahead have th eir 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 du e to repeated curves , road dividers or
roadside trees
• When vehicles ahead appear in a faraway lane on a wide road
• When the lights of vehicles ahead are not on ●
The high beams may be turned off if a vehicl e ahead that is using fog lights without its
headlights turned on is detected. ●
House lights, street lights, 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 operational lights on one side
• When a vehicle ahead is a two-wheeled vehicle
• The condition of the road (gradient, cu rve, condition of the road surface, etc.)
• The number of passengers and amount of luggage in the vehicle ●
The high beams may turn on or off unexpectedly.

2314-3. Operating the lights and wipers
4
Driving
RC F_U ●
Bicycles or similar vehicles may not be detected. ●
In the following situations the system may not be able to correctly detect the surround-
ing brightness level. This may cause the lo w beams to remain on or the high beams to
flash or dazzle pedestrians or vehicles ahead. In such a case, it is necessary to manually
switch between the high and low beams.
• When driving in inclement weather (heavy ra in, snow, fog, sandstorms, etc.)
• When the windshield is obscured by fog, mist, ice, dirt, etc.
• When the windshield is cracked or damaged
• 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 he adlights, 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 intermittently changi ng brightness and darkness
• When frequently and repeated ly driving ascendin g/descending roads, or roads with
rough, bumpy or uneven surfaces (such as stone-paved roads, gravel roads, etc.)
• When frequently and repeatedly taking curves or driving on a winding road
• When there is a highly reflective object ahea d 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 damaged 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 repeat-
edly in an abnormal manner
• When the driver believes that the high beams may be flashing or dazzling pedestri-
ans or other drivers■
Temporarily lowering sensor sensitivity
The sensitivity of the sensor can be temporarily lowered.
Turn the engine switch off while the following conditions are met.
• The headlight switch is in or .
• The headlight switch lever is in high beam position.
• Automatic High Beam switch is on.
Turn the engine switch to IGNITION ON mode.
Within 30 seconds after , re peat pulling the he adlight switch lever to the original
position then pushing it to the high beam position quickly 10 times, then leave the lever
in high beam position.
If the sensitivity is changed, the Automatic High Beam indicator is turn on and off 3
times.
Automatic High Beam (head lights) may turn on even the vehicle is stopped.1
2
3 2
4

2354-3. Operating the lights and wipers
4
Driving
RC F_U 
Rain-sensing windshield wipers
(U.S.A.) or (Canada)
Move the lever up by 2 levels
Move the lever up by 1 level
(U.S.A.) or (Canada)
Move the lever down by 1 level
(U.S.A.) or (Canada)
Move the lever down by 2 lev-
els
AUTO mode on/off switch With AUTO mode selected, the wipers will operate automatically when the sensor
detects falling rain. The system automatically adjusts wiper timing in accordance with
rain volume and vehicle speed.
The AUTO mode indicator will turn on when AUTO mode is selected.
* 1
: After temporary operation, the mode will return to AUTO mode.
* 2
: AUTO mode will be canceled. AUTO mode
indicator1
2
3
4
5
or
or
or
Off Temporary
operation Temporary
operation Low speed
operation High speed
operation
Low speed
operation Off Off High speed
operation High speed
operation
High speed
operation Off Low speed
operation No change No change
AUTO
mode Intermittent
operation
Off Temporary
operation
* 1
Low speed
operation
* 2
High speed
operation
* 2
Continuously No changeOperation
Status
before
operation

236 4-3. Operating the lights and wipers
RC F_U When AUTO mode is selected, the sensor sensitivity can be adjusted by turning
the switch ring.
Increases the sensitivity
Decreases the sensitivity
Washer/wiper dual operation 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, th e headlight cleaners
will operate once. After this, the head-
light cleaners will operate every 5th
time the lever is pulled.
The wipers can be used as intermittent windshield wipers, which operate regard-
less of vehicle speed or amount of rain drops. The intermitte nt windshield wiper
operation can be switched wh en the vehicle is stopped and the wiper is off. The
wiper operation cannot be switched duri ng AUTO mode or while the intermit-
tent windshield wi pers 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
vehicle is stopped and the wipers are off. 6
7
8
Switching between the intermittent windshield wipers and rain-sensing
windshield wipers (vehicles with rain-sensing windshield wipers)

2394-3. Operating the lights and wipers
4
Driving
RC F_U ■
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 operation (vehicles with rain-sensing windshield wip-
ers)
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 until drip prevention wiper
sweep occurs)
With low speed windshield wi per operation selected, wipe r operation will be switched
from low speed to intermittent wiper operation only when the vehicle is stationary. ■
Raindrop sensor (vehicles with rain-sensing windshield wipers)
●
If the wiper is turned to AUTO mode wh ile the engine switch is in IGNITION ON
mode, the wipers will operate once to show that AUTO mode is activated.●
If the temperature of the rain drop 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 tempor ary operation (vehicles with rain-sensing
windshield wipers)
AUTO mode cannot be activa ted 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 windshield
washer fluid reservoir. ●
The raindrop sensor judges the amount of
raindrops.
An optical sensor is ad opted. It may not oper-
ate properly when sunlight from the rising or
setting of the sun inte rmittently strikes the
windshield, or if bugs etc. are present on the
windshield.

240 4-3. Operating the lights and wipers
RC F_U WARNING ■
Caution regarding the use of windshield wipers in AUTO mode
The windshield wipers may operate unexpectedly if the sensor is touched or the wind-
shield is subject to vibratio n 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 fl uid until the windshield becomes warm. The
fluid may freeze on the windshield and cause lo w visibility. This may lead to an accident,
resulting in death or serious injury.
NOTICE ■
When the windshield is dry
Do not use the wipers, as they may damage the windshield. ■
When there is no washer fluid spray from the nozzle
Damage to the washer fluid pump may be cau sed 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 nozz le will be damaged.