Toyota SIENNA 2011 Quick Reference Manual page 317

2-3. Operating the lights and wipers
Rain-sensing windshield wipers (if equipped)
When "AUTO" is selected, the wipers will operate automatically
when the sensor detects falling rain. The system automatically
adjusts wiper timing in accordance with rain volume.
When "AUTO" is selected, the sensor sensitivity can be adjusted
as follows by turning the switch ring:
266
Washer/wiper dual opera-
tion
The wipers will automatically
operate a couple of times after
the washer squirts.
Rain-sensing wiper opera-
tion ("AUTO")
Low speed wiper operation
High speed wiper operation
Temporary operation
I n f o r ma t i o n P r o v i d e d b y :