[diagso]

I've tried the other day on a F40 with latest I-step(with ISTA from sedoy). Just coding one ECU was possible since there is no messuring plan available because all ECU's are updated. As much i know some units can only be programmed in combination with other's this information can also be found in esys what ECU's has to be programmed together. But i don't know why ISTA can't just writhe the coding file to one unit. It could be because coding file changes with I-step upgrade, so if ISTA is on a newer version than current I-step and the coding file is changed it does not allow to just code one ECU's. But i probably missing something, please correct if someone knows better.

Just got my hands on ISTA+ manual and it clearly states that in "advance" tab you can add additional ECU's for programing on top action plan calcualted in "comfort" but deselecting is not possible. 

Unless someone is willing to correct me I will trust BMW manual.