Toyota Yaris Manual page 215

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When the sensor sensitivity ring is turned toward high while in "AUTO"
mode, the wiper will operate once to indicate that the sensor sensitivity is
enhanced.
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If the temperature of the raindrop sensor is 90°C (194°F) or higher, or -15°C
(5°F) or lower, automatic operation may not occur. In this case, operate the
wiper in any mode other than "AUTO" mode.
■
If no windshield washer fluid sprays
Check that the washer nozzle is not blocked, if there is washer fluid in the
windshield washer fluid reservoir.
WARNING
■
Caution regarding the use of windshield wiper in "AUTO" mode (vehi-
cles with a rain-sensing windshield wiper)
The windshield wiper may operate unexpectedly if the sensor is touched or
the windshield is subject to vibration in "AUTO" mode. Take care that your
fingers, etc., do not become caught in the windshield wiper.
■
Caution regarding the use of washer fluid
When it is cold, do not use the washer fluid until the windshield becomes
warm. The fluid may freeze on the windshield and cause low visibility. This
may lead to an accident, resulting in death or serious injury.
NOTICE
■
When the windshield is dry
Do not use the wiper, 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 becomes blocked
In this case, contact any authorized Toyota dealer or repairer, or another
duly qualified and equipped professional.
Do not try to clear it with a pin or other object. The nozzle will be damaged.
YARIS_F_WE_52F20E
4-3. Operating the lights and wipers
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