DTC B163E-00: Rain Sensor Module LIN Fault: General Description
WARNING: This page is about a different car, the 2022 Genesis G90. However, it is still accessible from the selected car via links, so may be relevant.
"RAIN SENSOR" which is attached at front window glass measures the precipitation and the illumination. The precipitation is needed for determining operating time and controlling auto Low/High speed of the wiper. And the illumination is needed for controlling the lamps.