I have the following problem. I read in bdm a ecu marelli mjd602 Opel meriva 75hp. All good reading with the three files eeprom 4kb, micro 513kb and flash 2048kb. Open the file with ecm that does not have the drv exact but not bad. I edit the file in 2d and except. Then I have the doubt of the cks.......I open my ecm I try to do the calculation of the cks , choosing the family 76 fiat/Opel /Suzuki mjt, but is error during the calculation. Also trying to write in bdm to the flash V54 tells me before beginning writing that the cks is not supported, that I stopped to not make a mess.Can you tell me what should I do? If I write it so definitely not a party to las machine, or am I wrong? Thanks to all