Hi people Ive bought an ols300 and plan on using on 2.5 VW T4 edc15vm.

I'm told that to live tune/change on this i will need to disable the checksums, i dont know where to start with checksum disable is there anyone able to assist with this?

thanks

KP

yes i tried with it but it cuts out quite alot and with checksum disabled would be awesome for live mapping

I never worked on this, CWNOROMCHKRESET is not part of EDC15V defintions AFAIS

This seems to be equal to ECD15:
CS-test will start while initialisation and then goes on with a periodical backround test

AFAIR in MSA12/15, there was only a intialisation test and no backround test. So after ones CS-test pasted, you could chance every bit of flash without CS-error

So IMO you need to switch of periodic backround test..

Here you find the same "problem":

http://nefariousmotorsports.com/forum/index.php?topic=12846.0

on edc15p or vm, to disable "live" checksum, put "3d d3 3d d3" instead of "c3 c3 c3 c3" at address 0x70b76 (or 60b76/50b76)
, on msa15 at adress 0x38B76.
When you mod this, only the checksum at motor start must be exact, the checksum verification when motor run are disabled.

here is the sw I am working on currently