The rain sensor is located behind the interior rearview mirror housing and is mounted in a bracket glued to the inside surface of the windshield. The rain sensor consists of several emitting and receiving diodes that emit and receive infrared radiation. By comparing the received light signal with the known transmitted light signal, the rain sensor can determine the amount of water on the outside surface of the windshield.
NOTE: A = clean and dry windshield; B = wet and dirty windshield.
| Pos. | Spare part number | Name |
| 1 | - | Outer surface of the windshield |
| 2 | - | Optical element |
| 3 | - | Emitting diodes (receive 100% of radiation) |
| 4 | - | Rain sensor |
| 5 | - | Receiving diodes (receive 100% of radiation) |
| 6 | - | Water drops/film |
| 7 | - | Receiving diodes (receive less than 100% of radiation) |
| 8 | - | The lost component of radiation |
NOTE: The rain sensor also includes a light sensor. The light sensor is used to control the operation of the automatic headlight function. For more information, refer to the chapter: Exterior Lighting (417-01 Exterior Lighting, Description and Function).
The rain sensor is connected to the vehicle's electrical system via a 3-pin electrical connector. The electrical connector provides power from the CJB, a LIN bus connection to the CJB and a ground connection.
The original text can be found at (LRman.ru)
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