236 RAIN LIGHT SENSOR SYSTEM (IF APPLICABLE) 1. RAIN LIGHT SENSOR DESCRIPTION: RAIN SENSOR: It is an optical system, which operates in the infrared wavelength range. The sensor houses 6 infra-red LED’s forming a segment of a circle around a receiver diode. Any rain drops landing on the windscreen in the sensitive area of the sensor cause spontaneous imbalance in the reflection, which results in production of a voltage with the clocking frequency of the LED’s. An electronic analyzer and output detect these brief deviations as digital pulses. The pulse duration is a measure of droplet LIGHT SENSOR: The Light Sensor is an optical system. It operates with three photo diodes, FW, IR and AL that have different characteristics. The three diodes measure independently from each other. Diode AL (Ambient Light) is used to measure the ambient light above the vehicle with a relative wide apex angle. This receiver reacts to light in the human eye wave range (visible light). Diode IR (Infra-Red) is used to measure the ambient light perpendicular to the windshield with a relative wide apex angle. This receiver reacts to light in infrared light wave range. 2. Solar Sensor: The Solar Sensor measures the sun intensity crossing the windscreen, when the sensor is powered properly, it gets the appropriate LIN Messages and the solar sensor functionality is active. The Solar function supports the climate control to enhance the comfort in two ways: 1- It measures the intensity of the sun crossing the windshield. 2- It supports the establishment of a dual zone climatization depending on the position of the sun (location to the right or to the left of the vehicle)." LOCATION: It is located at top portion of front windscreen glass with connector position in upward direction CONNECTOR DETAILS: PIN DETAILS 1 VCC CRLT 2 GND 3 LIN - Bus REMOVAL: 1.Remove the rain light sensor big & small covers from the front windscreen. LOW VOLTAGE ELECTRICAL SYSTEM (LV)
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