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Title: bad checksum, car won`t start. need help Post by: ventovr6qc on April 19, 2011, 07:33:49 PM i just resoldered a new chip after a bad checksum flash and the car still won`t start.
it can`t even connect with vag-com or nefmoto on the kwp2000 protocol is it because i haven`t removed the checksum error? if so, how do i remove it thanks Title: Re: bad checksum, car won`t start. need help Post by: judeisnotobscure on April 19, 2011, 07:50:52 PM read this thread
hope it helps http://www.nefariousmotorsports.com/forum/index.php/topic,415.0title,.html Title: Re: bad checksum, car won`t start. need help Post by: ventovr6qc on April 19, 2011, 07:54:41 PM read it already
still a no go Title: Re: bad checksum, car won`t start. need help Post by: setzi62 on April 20, 2011, 02:11:58 AM Did you program the new flash chip with the original image? If VAG-COM or NefMoto can't
connect after soldering in the new flash chip with orig image, you might have a soldering problem. Check that all connections are fine and that there are no short circuits. Connection via K-line should work independent wether there is a checksum error or not. The checksum error is stored in the EEPROM and is not cleared when replacing the flash chip. You can reprogram the EEPROM or do a complete flash cycle with NefMoto to get rid of this. Title: Re: bad checksum, car won`t start. need help Post by: julex on April 20, 2011, 08:27:38 AM i just resoldered a new chip after a bad checksum flash and the car still won`t start. it can`t even connect with vag-com or nefmoto on the kwp2000 protocol is it because i haven`t removed the checksum error? if so, how do i remove it thanks Get galletto 1260 and try boot mode if your chip supports it that is. I think you went a bit overboard with the whole soldering activities. Normally, even if you screw the ECU while flashing, you can re-flash once you dicsonnect the ECU from battery for at least 1 minute. |