The rain sensor is located behind the body of the interior rear-view mirror and is installed in a bracket glued to the inner 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 outer surface of the windshield.
NOTE: A = clean and dry windshield; B = Wet and dirty windshield.
Pos. | spare part no | Name |
1 | - | The outer surface of the windshield |
2 | - | Optical element |
3 | - | Emitting Diodes (receive 100% radiation) |
4 | - | Rain sensor |
5 | - | Receiving Diodes (receive 100% radiation) |
6 | - | Water droplets/film |
7 | - | Receiving Diodes (receive less than 100% radiation) |
8 | - | Lost radiation component |
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, see the chapter: Outdoor Lighting (417-01 Outdoor lighting, Description and principle of operation).
The rain sensor is connected to the vehicle wiring via a 3-pin electrical connector. The electrical connector provides power from the CJB, LIN bus connection to the CJB, and ground connection.
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