Well I know with jap 205's they have a cco wire and A egw wire and no one on here could tell me what they are and finally a rusian site said they are an exhaust gas temp and a warning light incase damage to th cat will occur due to high heat. I still don't which is which but there supposidly not important in a swap.
Also American wiring diagrams are rather different to Australian we have a brown wire called thg I only know this as I bought the australian bgb which happens to be European as well. But I only have wiring diagrams. Nothing els for engine. Eg I don't have the efi test meathods so I still not sure what this damn thg wire does.
I know this is an american site but it's becoming more international and I think with conversions and engine swaps happening a Japanese 185 205 and 215 manual is needed particularly wiring diagrams