Lexus IS 250C 2014 Manual page 186

2-3. Operating the lights and windshield wipers
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.)
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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.)