A client of mine wants to switch from OpenInverter to either EV Controls T-2C or Dynam Labs VCU+ for his LDU. I explained that he’ll need to reinstall the original Tesla logic board, and because his LDU is mounted in reverse, he’ll also need to swap two of the phase busbars (U, V, W) and the encoder wires. This is necessary because any setup using the OEM Tesla logic board is limited in reverse due to Tesla’s software, so you have to trick it into thinking it’s going forward.
While inspecting my own LDU, I noticed something interesting: it looks like you might be able to just swap the little white wiring harnesses going to the phase boards instead. In theory, this would allow you to swap two phases on the LV logic side rather than the HV busbars. Way easier, if it worked.
Obviously, I’m not keen on frying a motor just to test a theory, so I wanted to ask: has anyone tried this, or know enough to say whether it’s even possible? My gut says no, since those wires likely only carry sensor signals, and the actual phase sequencing is hardwired. But if this worked... wow, it would make things so much simpler.
