Nissan LEAF 2023 Owners Manual
6.6.1. Rain-sensing auto wiper system
The rain-sensing auto wiper system automatically turns on the wipers and adjusts the wiper speed depending on the rainfall and the vehicle speed by using the rain sensor located on the upper part of the windscreen.
To set the rain-sensing auto wiper system, push the lever down to the AUTO position (1). The wiper will sweep once while the power switch is in the ON position.
The rain sensor sensitivity level can be adjusted by turning the knob toward the front (2) (High) or toward the rear (3) (Low).
To turn the rain-sensing auto wiper system off, push up the lever to the OFF position, or pull down the lever to the 
(Low) or 
(High) position.
Do not touch the rain sensor and its surrounding area when the wiper switch is in the AUTO position and the power switch is in the ON position. The wipers may operate unexpectedly and cause an injury or may damage a wiper.
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.
When the windscreen glass is coated with water repellent, the speed of the rain-sensing auto wipers may be higher even though the amount of rainfall is small.
Be sure to turn off the rain-sensing auto wiper system when you use a car wash.
The rain-sensing auto wipers may not operate if rain does not hit the rain sensor although it is raining.