E46 - Rain-Light Sensor: Layout
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The rain-light sensor is an optical system consisting of the rain sensor, the driving lights sensor and an electronic evaluation unit.
The rain sensor comprises
- Optical element: the optical element is affixed to the windscreen.
- Electronics unit: the electronics unit houses 4 optical transmitter and 4 receiver diodes in addition to the evaluation electronics.
- Heating: an integrated heating system prevents the optical element and the diodes from misting over.
The driving light sensor consists of 2 photodiodes and an electronic evaluation unit.