windshield wipers Lexus IS250C 2014 User Guide

183
2-3. Operating the lights and windshield wipers
2
When driving
IS250C/350C_U
Ty p e BOff
Intermittent wind-
shield wiper operation
Low speed windshield
wiper operation
High speed wind-
shield wiper operation
Temporary operation
Increases the intermittent
windshield wiper frequency
Decreases the intermittent
windshield wiper frequency

184
2-3. Operating the lights and windshield wipers
IS250C/350C_U
Washer/wiper dual operation
Wipers operate automatically.
(After operating several times,
the wipers operate one more
time after a short delay to pre-
vent dripping.)
■Rain-sensing windshield wipers (if equipped)
When is selected, the wipers will operate automatically when
the sensor detects falling rain. The system automatically adjusts wiper
timing in according to rain volume and vehicle speed.
When is selected, the sensor sensitivity can be adjusted as fol-
lows by turning the switch ring:
Ty p e A Off
Rain-sensing wind-
shield wiper operation
Low speed windshield
wiper operation
High speed wind-
shield wiper operation
Temporary operation

185
2-3. Operating the lights and windshield wipers
2
When driving
IS250C/350C_U
Ty p e BOff
Rain-sensing wind-
shield wiper operation
Low speed windshield
wiper operation
High speed wind-
shield wiper operation
Temporary operation

186
2-3. Operating the lights and windshield wipers
IS250C/350C_U
■The windshield wipers and washer can be operated when
The “ENGINE START STOP” switch is in IGNITION ON mode.
■Effects of vehicle speed on wiper operation
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)
Low speed wiper operation selected, wiper operation will be switched from low
speed to intermittent wiper operation only when the vehicle is stationary.
(However, the mode cannot be switched when the adjustment dial for the intermit-
tent wiper interval is set to the lowest setting.)
Sensor sensitivity (high)
Sensor sensitivity (low)
Washer/wiper dual operation
Wipers operate automatically.
(After operating several times,
the wipers operate one more
time after a short delay to pre-
vent dripping.)

187
2-3. Operating the lights and windshield wipers
2
When driving
IS250C/350C_U
■Raindrop sensor (vehicles with the rain-sensing windshield wipers)
●If the wiper switch is turned to “AUTO” position while the “ENGINE START
STOP” switch is in IGNITION ON mode, the wiper will operate once to show
that auto mode is activated.
●If the temperature of the raindrop sensor is 194°F (90 °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”.
■Outside rear view mirror defogger activation linked to windshield wiper opera-
tion
The outside rear view mirror defogger automatically turns on when you operate the
windshield wipers.
■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.
■Customization that can be configured at Lexus dealer
Settings (e.g. drip prevention function) can be changed.
(Customizable features →P. 5 8 6 )
CAUTION
■Caution regarding the use of windshield wipers in “AUTO” mode (vehicles with
the rain-sensing windshield wipers)
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.
●The sensor judges the amount of raindrops.

188
2-3. Operating the lights and windshield wipers
IS250C/350C_U
NOTICE
■When the windshield is dry
Do not use the wipers, as they may damage the windshield.
■When a nozzle becomes blocked
Do not try to clear it with a pin or other object. The nozzle will be damaged.
■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.

189
2-3. Operating the lights and windshield wipers
2
When driving
IS250C/350C_U
Headlight cleaner switch∗
■The headlight cleaner can be operated when
When the “ENGINE START STOP” switch is in IGNITION ON mode and the
headlight switch is turned on.
■Windshield washer linked operation
Only for the first time when the windshield washer is operated after the “ENGINE
START STOP” switch is turned to IGNITION ON mode with the headlights on, the
headlight cleaners will also operate once. ( →P. 1 8 2 )
NOTICE
■When the washer fluid tank is empty
Do not use this function when the washer fluid tank is empty. This may cause the
washer fluid pump to overheat.
Washer fluid can be sprayed on the headlights.
Press the switch to clean the
headlights.
∗: If equipped

202
2-4. Using other driving systems
IS250C/350C_U
Adjusting the speed setting:
→P. 1 9 6
Canceling and resuming the speed
setting: →P. 1 9 8
■Dynamic radar cruise control can be set when
●The shift lever is in the D or range 4 or higher of S has been selected.
●Range 4 or higher has been selected by using the paddle shift.
●Vehicle speed is above approximately 30 mph (50 km/h).
■Accelerating after setting the vehicle speed
The vehicle can accelerate normally. After acceleration, the set speed resumes.
However, during vehicle-to-vehicle distance control mode, the vehicle speed may
decrease below the set speed in order to maintain the distance to the vehicle
ahead.
■Automatic cancelation of vehicle-to-vehicle distance control
Vehicle-to-vehicle distance control driving is automatically canceled in the follow-
ing situations:
●Actual vehicle speed falls below approximately 25 mph (40 km/h).
●VSC is activated.
●The sensor cannot operate correctly because it is covered in some way.
●The windshield wipers are operating at high speed (when the wiper switch is set
to the “AUTO” mode or the high speed wiper operation position).
●When snow mode is set.
If vehicle-to-vehicle distance control driving is automatically canceled for any other
reason, there may be a malfunction in the system. Contact your Lexus dealer.
■Automatic cancelation of constant speed control
The cruise control will stop maintaining the vehicle speed in the following situations:
●Actual vehicle speed is more than approximately 10 mph (16 km/h) below the
set vehicle speed.
At this time, the memorized set speed is not retained.
●Vehicle speed falls below approximately 25 mph (40 km/h).
●VSC is activated.

398
4-1. Maintenance and care
IS250C/350C_U
CAUTION
■When cleaning the windshield (vehicles with the rain-sensing windshield wipers)
●When the upper part of the windshield where the raindrop sensor is located is
touched by hand
●When a wet rag or similar is held close to the raindrop sensor
●If something bumps against the windshield
●If you directly touch the raindrop sensor body or if something bumps into the
raindrop sensor
■Caution about the exhaust pipe
Exhaust gasses cause the exhaust pipe to become quite hot. Therefore, do not
touch it while the engine is running or immediately after turning the engine off.
When washing the vehicle, be careful not to touch the exhaust pipe until it has
cooled sufficiently, as touching a hot exhaust pipe can cause burns.
Set the wiper switch to off.
If the wiper switch is in “AUTO”, the wipers
may operate unexpectedly in the following
situations, and may result in hands being
caught or other serious injuries and cause
damage to the wiper blades.Off

400
4-1. Maintenance and care
IS250C/350C_U
NOTICE
■To prevent damage to the windshield wiper arms
When lifting the wiper arms away from the windshield, pull the driver side wiper
arm upward first, and repeat for the passenger side. When returning the wipers to
their original position, do so from the passenger side first.
■When using an automatic car wash (vehicles with the rain-sensing windshield
wipers only)
Set the wiper switch to the off position.
If the wiper switch is in “AUTO”, the wipers may operate and the wiper blades may
be damaged.