I am glad you guys on the right track with this fix :) Especially with a blank PIC programmed up, nice one.

Hi guys, in case the temp sensor boards (there is no BMS with the NiMH batteries) are shorted you may indeed have the 7805 5V power regulator IC damaged in the charger. In case you don't see 5 volts on the output it needs to be replaced obviously (can be checked on the 24 port interface as well). This floating 5V powers the temp boards. The new boards should come preprogrammed. I am not aware of a firmware for these neither a programming method via CAN bus with Scooter Diag.

There is ICSP on these boards for low level programming marked as J1. Should the above fail and you need the hex files I could try to extract them from my boards.

/ Azzuro