Toyota Avalon Owner's Manual page 160

Automatic operation (position 1)
The wiper speed is determined by the
amount of raindrops and sunlight detected
by the automatic wiper control sensor.
The automatic wiper control sensor is on
the inside of the windshield as shown
above.
If you feel that the operation of the auto-
matic wiper control is too fast or too slow,
twist the automatic control adjuster in the
"- " direction to lower sensitivity, and "+"
direction to boost the sensitivity.
138
'06 AVALON_U (L/O 0508)
Even if the wiper lever is in the position
1, the system will switch to intermittent
operations in the following conditions:
D
When the windshield gets extremely
cold (at less than -10_C [14_F])
D
When the system malfunctions
However, when the windshield gets ex-
tremely hot (at more than 90_C [194_F]),
the wipers do not operate even if the
wiper lever is in the position 1.
As soon as the vehicle starts to move,
the wiper will operate once to clear the
driver's front view if it is set to "INT".
I n f o r ma t i o n P r o v i d e d b y :
CAUTION
Be careful not to get your fingers
caught between the wipers and wind-
shield.
When the wiper lever is in the posi-
tion 1 with the ignition switch on, the
wipers could operate automatically in
the following cases:
D
If you touch the upper center of the
windshield adjacent to the sensor.
D
If you wipe the upper center of the
windshield (adjacent to which the
sensor is located) with a towel or
other object.
D
If the windshield vibrates.
D
If you touch the sensor.
NOTICE
Do not apply detergent to or wet the
automatic wiper control sensor when
cleaning the inside of the windshield.