blackash05 Posted December 8, 2008 Share Posted December 8, 2008 New member: What does the black box behind the windshield rear view mirror on my 2005 LS 430 do? Quote Link to comment Share on other sites More sharing options...
OLDSCHOLEVO Posted December 8, 2008 Share Posted December 8, 2008 rain sensor Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted December 8, 2008 Share Posted December 8, 2008 I've heard the compass is in there... is that true? Quote Link to comment Share on other sites More sharing options...
nll714 Posted December 8, 2008 Share Posted December 8, 2008 Saw this post on another board and thought it might be a good addition to this post. Yes, that box behind your rear view is the rain sensor. The rain sensor box contains 4 infrared LED's and 2 photo diode receivers. The unit works by bouncing infrared light off the windshield at an angle, and then measuring the amount of light that comes back. Raindrops on the windshield will alter the angle of reflection for the light, and therefore change the amount of light hitting the receivers. Touching the unit must change the equation as well... maybe light that was getting "lost" ends up reflecting off your hand and affecting the measurement. Quote Link to comment Share on other sites More sharing options...
blackash05 Posted December 8, 2008 Author Share Posted December 8, 2008 Saw this post on another board and thought it might be a good addition to this post. Yes, that box behind your rear view is the rain sensor.The rain sensor box contains 4 infrared LED's and 2 photo diode receivers. The unit works by bouncing infrared light off the windshield at an angle, and then measuring the amount of light that comes back. Raindrops on the windshield will alter the angle of reflection for the light, and therefore change the amount of light hitting the receivers. Touching the unit must change the equation as well... maybe light that was getting "lost" ends up reflecting off your hand and affecting the measurement. Thanks! :D Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted December 9, 2008 Share Posted December 9, 2008 Huh! Good to know ;) Quote Link to comment Share on other sites More sharing options...
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