Toyota 2009 Avalon Owner's Manual page 182

2-3. Operating the lights and windshield wipers
The windshield wiper and washer can be operated when
n
Vehicles with smart key system
The "ENGINE START STOP" switch is in IGNITION ON mode.
Vehicles without smart key system
The engine switch is in the "ON" position.
n Dripping prevention wiper sweep
After washing and wiping operation several times, the wipers operate one
more time after a short delay to prevent dripping.
However, the last sweep will not happen if the vehicle is traveling above 106
mph (170 km/h).
Effects of vehicle speed on wiper operation
n
Vehicle speed affects the following even when the wipers are not in "AUTO"
mode.
Intermittent wiper interval (
l
Wiper operation when the washer is being used (delay until drip preven-
l
tion wiper sweep occurs)
With low speed mode, wiper operation will be switched from low speed to
intermittent wiper operation only when the vehicle is stationary.
Rain drop sensor (vehicles equipped with the raindrop detection wind-
n
shield wipers)
n 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.
156
mode)
The sensor judges the amount of rain-
drops.