Lexus CT200h Owner's Manual page 243

Rain-sensing windshield wipers (if equipped)
When "AUTO" is selected, the wipers will operate automati-
cally when the sensor detects falling rain. The system automati-
cally adjusts wiper timing in accordance with rain volume and
vehicle speed.
When "AUTO" is selected, the sensor sensitivity can be adjusted
as follows by turning the switch ring:
CT200h_OM_OM76067E_(EE)
2-3. Operating the lights and windshield wipers
Rain-sensing wiper opera-
tion
Low speed wiper operation
High speed wiper opera-
tion
Temporary operation
2
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