TOYOTA 2010 Sienna - Manual (Page 218)

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2-3. Operating the lights and wipers
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The windshield wipers and washer can be operated when
The engine switch is in the “ON” position.
■
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.
NOTICE
■
When the windshield is dry
Do not use the wipers, as they may damage the windshield.
■
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.
■
When a nozzle is blocked
Do not try to clear it with a pin or other object. The nozzle will be damaged.
Washer/wiper dual operation
Wipers operate automatically.