From the owner’s manual:
RAIN-SENSING AUTO WIPER SYSTEM
The rain-sensing auto wiper system can automatically turn on the wipers and adjust the wiper speed depending on the rainfall and vehicle speed by using the rain sensor located on the upper part of the windshield.
To set the rain-sensing auto wiper system, push the lever down to the AUTO position (1st detent below off). The wiper will sweep once while the ignition switch is in the ON position.
The rain sensor sensitivity level can adjusted be turning the knob toward the dash (high) or toward the driver (low).
- High – High sensitive operation
- Low – Low sensitive operation
To turn the rain-sensing auto wiper system off, push up the lever to the OFF position, or pull down the lever to the LO or HI position.
- The rain-sensing auto wipers are intended for use during rain. If the switch is left in the AUTO position, the wipers may operate unexpectedly when dirt, fingerprints, oil film or insects are stuck on or around the sensor. The wipers may also operate when exhaust gas or moisture affect the rain sensor
- The rain-sensing auto wipers may not operate if rain does not hit the rain sensor even if it is raining.
- When the windshield glass is coated with water repellent, the speed of the rain-sensing auto wipers may be higher even though the amount of the rainfall is small.