My guess is that you want kpro for your TSX, and now that Hondata doesn't sell their harness any more, you want to see if an Accord harness will work.
...You're good man.
Thankfully, a company from Toronto stepped up to offer something. http://www.k-tuned.com/store/product_info.php?cPath=20&products_id=207
They haven't started mass producing yet, and if the TSX community doesn't bite, I'm afraid they may pull this off before I gather enough funds