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Old 02-01-2006, 03:00 AM
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How long for computer reset?

I had some emission work done and they had to disconnect the battery to reset the computer. They said I need to come back in a few days to make sure the computers all reset.

Is there a specific procedure for resetting everything or what?
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Old 02-01-2006, 03:06 AM
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Quote:
Originally Posted by BlackDak
I had some emission work done and they had to disconnect the battery to reset the computer. They said I need to come back in a few days to make sure the computers all reset.

Is there a specific procedure for resetting everything or what?
It should reset it as soon as you disconnect the battery
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Old 02-01-2006, 03:11 AM
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The longest I've ever waited before hooking it back up was like 15 sec. when reseting the computer and it worked right away.
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Old 02-01-2006, 03:12 AM
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same here bro bout 20 min longest i waited sounds like something fishy
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Old 02-01-2006, 04:19 AM
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Sorry guys, I may have worded it wrong.

I disconnected my battery the other day to work on something. I reconnected it and was at the emissions testing station in about 20 minutes. They immediately asked if my truck had been serviced recently. Apparantly the different computers/sensors/whatever need some driving time before tey are reporting correctly. Thier computer was not getting any readings from the computers on the truck.

I drove for a couple days and went back. The scanner went fine, but it failed anyway.

After it was worked on at the shop today, they told me again that I would need to drive it a couple days and come back so that they can hook up the scanner and make sure all the computers are reading correctly before I go back to the testing station.

I am wondering how long I really have to wait (tabs go bad tonight, so driving around for a couple days will be risky) or if there is a certain procedure that the computer needs to see in order to reset or whatever.
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Old 02-01-2006, 04:22 AM
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On my Trans AM after the bat died they told me to drive at least 80 miles

But that is in CA
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Old 02-01-2006, 05:25 AM
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I've always reset the computer by disconnecting the neg battery cable and turning my ignition to the ON position and holding it for 10 seconds and then hooking the battery back up. I've never heard of it takin longer.
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Old 02-01-2006, 06:46 AM
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The thing is, when you erase the memory from the computer, it has to go through a relearn process. I guess it takes a little while for the computers to relearn all the settings and readings and whatnot. It takes some driving around for them to figure out where the settings need to be.

Until then, I guess a scanner will not receive a signal from the computer, which is what the emissions testing place found the first time I went through.
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Old 02-01-2006, 11:26 AM
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When you reset the computer, there are certain mappings that are relearned after driving. I belive it may be around 75 miles.

Many areas during emissions testing plug into the OBDII port. I have read posts on several forums where people were turned away and told to come back in 100 miles. The computer reads that it had been reset by a flag or how many miles since reset. Im not shure what it indicates by they can tell.
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Old 02-01-2006, 06:13 PM
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That is pretty much what I needed to know.
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