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Since you are new I will cut you a break, but please in future before posting a new thread use the search function - this topic has been covered dozens of time before.

Easiest way to do it is disconnect your battery and pump the brake pedal 10 times. Or leave the battery disconnected overnight.

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^^ this method did not work on my 2005 V35.. I am assuming the OP wants to clear the self learn data, which will need consult or a datascan tool (not sure if there is a manual procedure for this?)

Doubt you will notice any difference, unless a faulty sensor has been messing up the data previously.

maybe removing the battery works for earlier ECUs??

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pv35gt8 he never mentioned anything about fault codes .... read the topic content before you post ....

And sonicii in my 03 coupe it most definitely does work - I can feel the difference and see the fuel economy difference when I reset my ECU. Why else would they tell you in the installation instructions of things like the Kinetix upper plenum to reset the ECU via this method after fitting the upper plenum to see results? Maybe the series II ECU is different, but I can't imagine for a second the cars auto tune saves to flash.

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^^ this method did not work on my 2005 V35.. I am assuming the OP wants to clear the self learn data, which will need consult or a datascan tool (not sure if there is a manual procedure for this?)

Doubt you will notice any difference, unless a faulty sensor has been messing up the data previously.

maybe removing the battery works for earlier ECUs??

It should work. It worked on my 2001 VQ25det Stagea and still works on my 2004 VQ35de Stagea (basically an AWD Series 2 V35... with a nicer nose/body :P).

Perhaps your timing was a little out. It can be easy to miss-time.

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pv35gt8 he never mentioned anything about fault codes .... read the topic content before you post ....

And sonicii in my 03 coupe it most definitely does work - I can feel the difference and see the fuel economy difference when I reset my ECU. Why else would they tell you in the installation instructions of things like the Kinetix upper plenum to reset the ECU via this method after fitting the upper plenum to see results? Maybe the series II ECU is different, but I can't imagine for a second the cars auto tune saves to flash.

You need to retrieve the fault codes and clear them before you initiate a relearn.

Simply disconnecting the battery and letting the system completely drain any residual power will not reset the ECU.

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It should work. It worked on my 2001 VQ25det Stagea and still works on my 2004 VQ35de Stagea (basically an AWD Series 2 V35... with a nicer nose/body :P).

Perhaps your timing was a little out. It can be easy to miss-time.

Sorry, you managed to slip your last post in just before I hit send. I meant the disconnecting the battery method didn't work for me.

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pv35gt8 he never mentioned anything about fault codes .... read the topic content before you post ....

And sonicii in my 03 coupe it most definitely does work - I can feel the difference and see the fuel economy difference when I reset my ECU. Why else would they tell you in the installation instructions of things like the Kinetix upper plenum to reset the ECU via this method after fitting the upper plenum to see results? Maybe the series II ECU is different, but I can't imagine for a second the cars auto tune saves to flash.

It probably is a good idea to clear this data when making any significant changes. But I reset mine a couple of months back and reduced my fuel economy for a while.

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Where the hell is Suriname anyway?

South America, like North East. Google FTW. Was going to say "Hola", but then wiki says they speak Dutch :(

Sorry, you managed to slip your last post in just before I hit send. I meant the disconnecting the battery method didn't work for me.

+1

You car doesn't magically lose its ECU coding when there isn't a battery connected, so it ain't going to lose the self learn. Pump zee pedal, or get a program that works, like Cipher.

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