Honda 2007 Civic Hatchback Owner's Manual page 142

RAINFALL SENSOR
The rainfall sensor is located in the
windscreen near the rearview mirror.
If the sensor is covered with mud, oil,
dust, etc., the wipers may not
operate properly or may operate
unexpectedly.
Do not position the wiper lever in
AUTO when driving through a car
wash. Turn off this system when not
in use.
Windscreen Wipers and Washers
Instruments and Controls
139