Posted: 1/19/2013 6:08:02 PM EDT
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I have a button on my dash. When I push it, it indicates the outside temp.
How accurate is that number when I'm driving down the road on a cold night? How does it compensate for windchill? |
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Quoted:
Pretty accurate. The ECU is using that same temp sensor. ETA: And as the poster above says, it has nothing to do with wind chill. It's just the temperate of the air going past that sensor. Have seen some that are separate from the ECU, but no less accurate. They seem to be commonly placed up near the radiator but out of airflow. Seems to compare similar to banks and such that have temperature signs. |
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No windchill just temp.
On older cars they could be off by a little, I have seen several late 90's and early 2000's that were off by 3 or so but the newer ones are pretty spot on from my experience. ETA: The only exception would be if the car is sitting in a parking lot or something and has the sun beaming on it, sometimes this can throw it off because of the heat coming off the ground or the body on your car. |
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Quoted: No windchill just temp. On older cars they could be off by a little, I have seen several late 90's and early 2000's that were off by 3 or so but the newer ones are pretty spot on from my experience. ETA: The only exception would be if the car is sitting in a parking lot or something and has the sun beaming on it, sometimes this can throw it off because of the heat coming off the ground or the body on your car. i have a black car if its daylight it reads high for a couple minutes then drops to i'm guessing the correct temp once the wind cools it down. black cars are so fun. |
| Most are behind the grille as previously stated. When we used to put keyless/temp sensor/compass mirrors in GMT400 series (92-00) suburbans/tahoes (luxury conversion company) before they were OEM installed, I put the sensor behind the grille near the headlight bracket mounts just out of the windstream. Pretty decent. I would say maybe 2-3 degs. |
| put an object in a room at 32 degrees and it will chill down to 32 degrees. make the wind blow at 20mph in that same room and the object will still cool down to only 32 degrees. It will cool down faster with the wind. If the object is a human, it will feel as if it was colder than 32 degrees, due to the faster-than-32-degrees rate of cooling. |