I've always been curious as to what the sensors in each corner of the dash do. I know one is for the auto headlights, but what is the other used for? Security? I can't imagine one of them is used for the temp reading on the climate control (weird placement for that) and I know its not the outside temp sensor, that's in the front bumper. Anyone know? This has been bugging me.

 

I alway thought it was for the alarm. My alarm didn't work when I brought the car....

 

A/C Solar Sensor. When you make transitions between sunshine and shade, e.g. under the edge of a cloud, it adjusts the A/C more rapidly than would happen if it depended solely on the internal temperature sensor. It accounts for solar load as well as ambient temperature.

 

Damn, now that's hardcore...I had no idea the climate control was that complex.