Mazda 2013 Mazda3 Owner's Manual page 236

The sensitivity of the rain sensor can be
adjusted by turning the switch on the
wiper lever.
From the center position (normal), rotate
the switch downward for higher
sensitivity (faster response) or rotate it
upward for less sensitivity (slower
response).
Switch
CAUTION
Ø Do not shade the rain sensor by
adhering a sticker or a label on
the windshield. Otherwise the rain
sensor will not operate correctly.
Rain sensor
Higher sensitivity
Center
position
Less sensitivity
Switches and Controls
Ø When the wiper lever is in the
AUTO position and the ignition is
switched ON, the wipers may
move automatically in the
following cases:
Ø
If the windshield above the rain
sensor is touched or wiped with
a cloth.
Ø
If the windshield is struck with
a hand or other object from
either outside or inside the
vehicle.
Keep hands and scrapers clear of
the windshield when the wiper
lever is in the AUTO position and
the ignition is switched ON as
fingers could be pinched or the
wipers and wiper blades damaged
when the wipers activate
automatically.
If you are going to clean the
windshield, be sure the wipers are
turned off completely―this is
particularly important when
clearing ice and snow―when it is
most likely that the engine is left
running.
Driving Your Mazda
5-73