Need help with LDU inverter firmware download/upload
Posted: Fri Sep 03, 2021 5:10 pm
Hi there folks,
I'm hoping to get a bit of assistance with an issue. I'm posting this on behalf of an acquaintance of mine named Shadi (who is from Jordan and doesn't speak English isn't very well). Shadi is working on a Mercedes B250e, which for those of you that don't know uses the same LDU as a Model S, but is set up for reverse rotation (reverse cut gears) and has an added parking pawl.
Unfortunately the inverter motherboard was damaged by a internal coolant leak, and will no longer function... The leak has been repaired, but since there were not many of these cars built, many of the parts for it are very difficult to get and he cannot source a replacement inverter or motherboard for it (especially in the part of the world he is in). He has access to another inverter motherboard (from a running car) that he's hoping to copy the firmware off of and transfer that to a Model S motherboard (which has the exact same part number and is not too hard to get).
Can anybody walk me though what he would need to connect to the JTAG ports on the boards, and what program would be needed to download and upload the firmware (if that's even possible)?
Thanks,
- Alex
I'm hoping to get a bit of assistance with an issue. I'm posting this on behalf of an acquaintance of mine named Shadi (who is from Jordan and doesn't speak English isn't very well). Shadi is working on a Mercedes B250e, which for those of you that don't know uses the same LDU as a Model S, but is set up for reverse rotation (reverse cut gears) and has an added parking pawl.
Unfortunately the inverter motherboard was damaged by a internal coolant leak, and will no longer function... The leak has been repaired, but since there were not many of these cars built, many of the parts for it are very difficult to get and he cannot source a replacement inverter or motherboard for it (especially in the part of the world he is in). He has access to another inverter motherboard (from a running car) that he's hoping to copy the firmware off of and transfer that to a Model S motherboard (which has the exact same part number and is not too hard to get).
Can anybody walk me though what he would need to connect to the JTAG ports on the boards, and what program would be needed to download and upload the firmware (if that's even possible)?
Thanks,
- Alex