Thought to chime in the discussion, may help if anyone needs a hand wiring his car. To be short: installed EDM AVN HU into USDM LGT without any problems.
Wiring almost matches the original connectors, had to split some for the INFO part to work properly. Now I only need to source a new instrument cluster, 'cause the trip info is a bit messed up, MPG vs liters/100km, fahrenheit vs celsius etc.
All working fine, except the voice guidance, that may be turned off, but just can't find the way to turn it back (either can't find a manual for this HU)
Also got the full service manual for this HU, with all diagrams.