[Tec] what actually does p.c.u do

[dangerous]

Is there any danger of damaging a PCU if the battery is flat, and you were to jump start it using cables?
??????

ECU??? yip every chance...... even push starting can fry the ECU more likely with the Iti stuff tho, I'd reconmend if jumping was necessary then turn off both engines befor disconecting the leads.
There are safty items avaible like a diod that protects the ECU and extra earts are handy aswell... but once againg I'm talking more of Itiallian bikes.