Alfa Romeo 166 Booklet page 61

Windscreen wiper (fig. 72-73)
The lever can be moved to five different
positions corresponding to:
A - Stationary (off)
B - Intermittent.
With the lever in position B, turning the
ring (1-fig. 73) four possible intermit-
tent speeds are obtained (except versions
with rain sensor):
= intermittent slow
■
= intermittent medium
■■
= intermittent medium-fast
■■■
= intermittent fast.
■■■■
C - Continuous, slow
D - Continuous, fast
E - Fast, temporary (unstable position).
Operation in position E is limited to the
time the lever is held in this position.
When the lever is released, it returns to
position A automatically stopping the
wiper.
Rain sensor (fig. 72-73)
(optional for versions/markets where
applicable)
The rain sensor is an electronic device
coupled with the windscreen wiper and its
purpose is to automatically adapt the fre-
quency of the wiper strokes according to
the intensity of the rain during intermit-
tent operation.
All the other functions controlled by the
right-hand lever (switching the wiper off,
slow and fast continuous operation, fast
temporary operation, windscreen washer
and headlight washer) remain un-
changed.
The rain sensor is activated automatical-
ly moving the right-hand lever to position
(B) and its field of adjustment changes
gradually.
fig. 73
Operating the windscreen washer with
the rain sensor activated (lever in position
B) the normal washing cycle is carried
out at the end of which the rain sensor
resumes normal operation automatically.
Moving the key to the STOP position
the rain sensor is deactivated and the
next time the car is started (key in MAR
position) it is not reactivated even if the
lever is still in position (B). In this case to
activate the rain sensor, simply move the
lever to position (A) or (C) and then
back to position (B).
When the rain sensor is reactivated in
this way, the wiper performs at least one
stroke, even if the windscreen is dry, to
signal that the sensor has been reactivat-
ed.
The rain sensor is fastened to the wind-
screen inside the area cleaned by the
wiper and it controls an electronic control
unit, which in turn controls the wind-
screen wiper motor.
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