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Author Topic: Failed checksum?  (Read 14971 times)
nyet
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« Reply #15 on: May 19, 2011, 04:09:55 PM »

I'm sure Tony will correct if needed...

It's not just NefMoto, but the protocol itself. The act of a successful flash using it clears the error flag. I know this from threads here.  Pretty fundamental to know if you're doing OBD tuning I'd say!

Sorry. I agree, it is critical to know this stuff Smiley

So: more dumb questions: The protocol used by NON bootmode flashers?
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carlossus
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« Reply #16 on: May 19, 2011, 11:32:46 PM »

I don't know 100%. take a peek at the NefMoto log to check or see if you can find the thread where Tony discussed this issue. Sorry, I'd check myself buy I'm on my phone and it's a ballache.
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Tony@NefMoto
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« Reply #17 on: May 23, 2011, 01:23:58 PM »

To clear the invalid checksum error code you have to flash using the VAG programming protocol and then successfully disconnect. In the KWP2000 message handler for the StopCommunication message, it handles clearing the invalid checksum error code when successful programming has occurred.

Boot mode allows you to flash the flash memory, but it doesn't do anything to the eeprom where the error codes are stored.
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nyet
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« Reply #18 on: May 23, 2011, 02:11:28 PM »

Thanks for the clarification, Tony. I need to add a note to the S4wiki to that effect.
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ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
Rick
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« Reply #19 on: May 23, 2011, 03:07:02 PM »

To clear the invalid checksum error code you have to flash using the VAG programming protocol and then successfully disconnect. In the KWP2000 message handler for the StopCommunication message, it handles clearing the invalid checksum error code when successful programming has occurred.

Boot mode allows you to flash the flash memory, but it doesn't do anything to the eeprom where the error codes are stored.

Successful disconnect! That's the key then.  I reflashed a couple of times and it didn't clear the code, mustn't have disconnected buy cycled the ignition instead?

Rick
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Tony@NefMoto
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« Reply #20 on: May 23, 2011, 03:16:00 PM »

Once flashing completes, you need to click the disconnect button. The disconnection process is what clears the error code.

The next release of the NefMoto flasher has changes to auto disconnect when flashing completes.
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Rick
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« Reply #21 on: May 23, 2011, 03:26:23 PM »

Cool Smiley
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Twiki
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« Reply #22 on: May 26, 2011, 10:30:35 AM »

Just wondering when Tony's new flasher will be available...?  Wink
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Tony@NefMoto
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« Reply #23 on: May 26, 2011, 12:33:04 PM »

Just wondering when Tony's new flasher will be available...?  Wink

The changes for the next release have been going and going and going. I have a stable release that just adds support for premium fast flashing, but I am still working on fixing a number of communication issues before officially releasing the next version.
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