•  The LED in the rain sensor emits infrared light which is reflected off the windshield via the lens and then received by the photodiode in the rain sensor. If the rate of reflected infrared light is reduced, it is determined that rain is contacting the windshield, and the intensity of the rainfall is calculated from the amount of reflection rate reduction.

•  By changing the sensitivity adjustment volume installed on the wiper and washer switch, the sensitivity of the rain sensor can be freely adjusted.

•  When the ignition switch is turned to the ON position after replacing the rain sensor with a new one, the initialization is stored after verifying the windshield condition.

Note

•  The rain sensor re-initialization can be performed optionally using the specified procedure.

―  For the re-initialization method, refer to the Workshop Manual.

•  If there is malfunction in the rain sensor, the rain sensor sends an error signal to the BCM and a DTC from the BCM is detected.

•  If there is a communication error between the rain sensor and BCM, the rain sensor sends an error signal to the BCM and a DTC is output from the BCM.

•  If the rain sensor detects rainfall and then detects no change in the detected amount after the wipers have been operated two times, the windshield is determined to be dirty and windshield wiper operation is stopped.

•  When the temperature sensor inside the rain sensor detects approx. -10°C{ 14°F} or less when the vehicle speed is 0 km/h{0 mph}, the windshield wipers do not operate.