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mellon
15th December, 2012, 05:32 PM
Error 16985 chksum un ecu. Please help.

veloseeped
15th December, 2012, 05:51 PM
Error 16985 chksum un ecu. Please help.

To clear this error you must repair eeprom dump, not the main flash dump.

mellon
17th December, 2012, 03:15 PM
But this car is after chip tunning. So maybe flash isn't corect. I found post that in eprom 95040 in #1c and #2c are "33' than error shows. i have "00" in this places.

veloseeped
17th December, 2012, 04:34 PM
But this car is after chip tunning. So maybe flash isn't corect. I found post that in eprom 95040 in #1c and #2c are "33' than error shows. i have "00" in this places.

Flash dump in your attachment was incorrectly read - first half of dump is twiced and repeated in second half of file.
Real second half is lost. So I can't check it CSM.
But error (also known as P0601 error) shows checksum ( or anti-tuning lock) error of eeprom content.
Main flash checksum have another error code.

ominimicu
17th December, 2012, 08:51 PM
checksum cannot be calculated, you can but still, car wont run good as it s missing a part.

just flash a new ori file witch checksum OK. you ll be fine

veloseeped
17th December, 2012, 09:04 PM
just flash a new ori file witch checksum OK. you ll be fine

Even you flash full original back that will not clear P0601 error.
Anycase you need patch eepom.

mellon
19th December, 2012, 08:36 PM
I was reading by wellon on table not by obd socket. I do it once again. Car runs but this error worry owners.