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How it works An infrared transmitter (2)sends infrared light to a lens (1) which directs the beam to the windshield (4) . The Dry windshield (Fig. A) When the area around the rain sensor (B38) is dry nearly all of the light is reflected and the IR receiver Wet windshield (Fig. B) When the reflection area is wet, some of the light is scattered away from the glass of the windshield. This The light intensity measured by the IR receiver (3) provides a measure of the rain intensity on the windshield. Fig. 26: Identifying Infrared Transmitter And IR Receiver Rain sensor data flow The rain sensor (B38) networks with the All Activity Module (AAM, N10) via the engine compartment CAN. More than just a "rain sensor," the unit also comprises integrated light sensors for the vehicle lighting
2001 Mercedes-Benz ML320 1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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