IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

NEEED HELP!!!!! messed up while trying to reset ecu

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Old 01-30-08 | 03:08 PM
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Default NEEED HELP!!!!! messed up while trying to reset ecu

ok so i just went outside to reset my ecu.. since i took off my K&N.. and havent sinc ei got my full exhaust..

i pulled out the 25A fuse then when i pulled out the 10A fuse it popped off and went down into the engine.. i cannot find it!!!!!!!!

will my car operate.. or what

do i just goto a auto place and get another one

what do i do??
Old 01-30-08 | 03:27 PM
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please help!!
Old 01-30-08 | 04:06 PM
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Look on the fuse cover and see what the fuse is for. If its something minimal then you should be able to drive it. As for replacing it, just go buy another 10A fuse and put it in.
Old 01-30-08 | 04:12 PM
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Removing the fuse is to reset ecm data for obd1 cars. For obd2 cars which is all IS 300's you need to only unplug the battery and let it completely drain the energy out for a few minutes and replug it in.
Old 01-30-08 | 09:20 PM
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when you remove the fuse cover, there should be one extra 10 amp fuse that is labeled spare. take that and use it for now
Old 01-30-08 | 11:07 PM
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i ended up just having a buddy drive me to buy another one.. thanks though guys..

i just was worried about it b/c it says to remove the fuse for 1 min the put it back in.. so i wasnt sure if it would be bad to have it out for a few hours.. but i guess it wasnt.. b/c everything is working good now
Old 01-31-08 | 07:31 AM
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First off ... quit resetting your ECU! It only takes a few miles of driving for the ECU to retune itself to a new intake or exhaust. The only reason why you should reset the ECU is if you are trying to clear a diagnostic code.
Old 01-31-08 | 08:11 AM
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Originally Posted by Gernby
First off ... quit resetting your ECU! It only takes a few miles of driving for the ECU to retune itself to a new intake or exhaust. The only reason why you should reset the ECU is if you are trying to clear a diagnostic code.

This is eactly true, and you need not remove fuses as well, only if they are blown. If they are blowing, then you have an issue. Don't wire anything into the fuse box either, you will be asking for trouble.
Old 01-31-08 | 09:09 AM
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Originally Posted by Gernby
First off ... quit resetting your ECU! It only takes a few miles of driving for the ECU to retune itself to a new intake or exhaust. The only reason why you should reset the ECU is if you are trying to clear a diagnostic code.
that was the first time i have EVER done it..
Old 01-31-08 | 09:30 AM
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Originally Posted by Lextasy89
that was the first time i have EVER done it..
It seemed like your second time, but that really isn't important. There's just never a reason to reset the ECU unless it is for some diagnostic purpose.
Old 01-31-08 | 09:38 AM
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well it was just my first.. and did i harm anything by resetting my ecu.. doesnt seem like it
Old 01-31-08 | 09:50 AM
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It isn't harmful to reset the ECU, just not beneficial. The car will take some period of time to "learn" how to idle smoothly, and may stall once or twice during the 1st few driving cycles. It may also get worse fuel economy while the long term fuel trims are recalculated. It also takes some time after a reset to be able to pass inspection since OBDII readiness codes take a certain number of driving cycles.
Old 01-31-08 | 10:05 AM
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Originally Posted by Gernby
It isn't harmful to reset the ECU, just not beneficial. The car will take some period of time to "learn" how to idle smoothly, and may stall once or twice during the 1st few driving cycles. It may also get worse fuel economy while the long term fuel trims are recalculated. It also takes some time after a reset to be able to pass inspection since OBDII readiness codes take a certain number of driving cycles.
im actually glad i did it.. my car seemed to idle way to high and was acting weird.. seems like every since i got my full exhaust.. but now its not anymore.. so im pretty happy with it overall
Old 01-31-08 | 10:15 AM
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Originally Posted by TACH_MOTOR
Removing the fuse is to reset ecm data for obd1 cars. For obd2 cars which is all IS 300's you need to only unplug the battery and let it completely drain the energy out for a few minutes and replug it in.
While this certainly may be the easiest way to do it, it's not always the right way. Disconnecting the battery also loses all your preset radio stations and any personal data stored in the NAV, such as waypoints, favorites, routes, and history.
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