06YarisRS's 2ZR-FE Swap 5-Door Hatchback (Automatic Transmission)

[06YarisRS]

Thanks gentlemen! To pick up on a few points... Adam, thanks for the advice on the wiring diagrams. I will try to find those. You mention body harness? I thought that all I was concerned with was the engine harness. I know about the MAF requiring an alternate power source and the speed sensor wires that need to be switched over to the xD harness. I'm sourcing all parts for my non-immobilizer auto Yaris in the USA and will buy a 2008 - 2009 ECU (89661-52F71). The harness is where I'm struggling now.

From my research, the xD came in both auto and manual transmission. I have been unable to confirm if there is any physical differences between the harness for manual and automatic. I expect the plugs for transmission might be different? Every part number on eBay goes like this: 648.SC1D11 (with what appears to be the last 2 digits referencing the model year). I had asked Tom and he didn't think there were any differences, but when I asked him, I didn't specify auto vs manual. On toyotapartsdeal, there are several different harness part numbers for the xD automatic trans:
2008 - 2009 (P#82121-52F00)
2010 - 2012 (P#82121-52K00)
2013 - 2014 (P#82121-52K01) - Maybe all these parts are the same but just different naming due to the production year. (Recall that I said I overthink things )

I don't want to pay ~$600.00 for a harness, so just trying to find a used one but all eBay listings use the 648.SC1xx format.

There is a harness and engine from a 2012 xD that I'm looking at and it is automatic. It is immobilizer so I can't use the ecu, but can I use the harness?

Right now, this is turning out to be the hardest part of parts procurement. I think once I get past this, it will smooth sailing, parts-wise. Should just need an ECU, throttlebody (and mounting hardware, gasket), alternator and A/C compressor. Planning to use my Yaris (cold climate) starter.