when the car is undergoing emissions testing, compared to unusual activity during normal driving - jackrabbit starts, stomping on the gas to avoid a collision, slamming on the brakes to avoid a collision, etc?
how would the software know
when the car is undergoing emissions testing, compared to unusual activity during normal driving - jackrabbit starts, stomping on the gas to avoid a collision, slamming on the brakes to avoid a collision, etc? Satan (impatiently) to Newcomer: The trouble with you Chicago people is, that you think you are the best people down here; whereas you are merely the most numerous. - - - Mark Twain, "Pudd'nhead Wilson's New Calendar" 1897 |
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It's plugged in
Serious question: When is the last time you had an emissions test, and how old was the car? Anything sold since 1996 has had the connector. They just plug you in and run the test - no tailpipe sniffer any more. I'm sure the computer knows when something is plugged in. -- Drew |
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Found another article.
VW aren't the only ones. Some manufacturers have their cars' ECU go into "emissions testing" mode when the non-driven set of wheels are stationary whilst it is apparently being driven. Wade. Just Add Story http://justaddstory.wordpress.com/ |
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Re: It's plugged in
Haven't been required to take an emissions test since I moved to the land of cowgirls over a decade ago. Satan (impatiently) to Newcomer: The trouble with you Chicago people is, that you think you are the best people down here; whereas you are merely the most numerous. - - - Mark Twain, "Pudd'nhead Wilson's New Calendar" 1897 |
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Re: how would the software know
Curiously enough, I spent a year and a half working on gadgets that plugged into OBDII ports and read trouble codes. The EPA tests are government mandated and and they are supposed to work in a specified manner so they are testable anywhere. The extra private test functions (eg. oil life remaining) are proprietary and can work any way the manufacturer wants. The OBDII protocol is polled; they can tell when it's plugged in to a tester. The conclusion is obvious. The germans have a LOT of proprietary tests and other functions. "Religion, n. A daughter of Hope and Fear, explaining to Ignorance the nature of the Unknowable." ~ AMBROSE BIERCE (1842-1914) |