TOYOTA 2010 Prius - Manual (Page 236)

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2-3. Operating the lights and windshield wipers
Windshield wipers and washer
Wiper intervals can be adjusted for intermittent operation (when
is selected).
Intermittent wiper operation
Low speed wiper operation
High speed wiper operation
Temporary operation
Increases the intermittent
windshield wiper frequency
(if equipped)
Decreases the intermittent
windshield wiper frequency
(if equipped)
ITO23P112a
ITO23P115