It is official... pin '6' on the connector is what we call pin '4' on the diagram - which is your TPS1 signal, and at idle mine reads 0.58V. This wire for me is pink, and is the "top-most" wire when the harness is connected. No idea why Kia swapped the numbers on us, but it is what it is, and it is Mr. Pink.
BTW: that diagram you have linked does have the colours (albeit the wrong ones) as about half way along any wire depicted you'll see something like 0.5Y. That means the wire you're looking for is 0.5mm in diameter, and Yellow. L is blue, O is orange, Br brown, etc... and stripes are B/Y which is black with a yellow stripe... just for future reference. Helpful when a harness may have four red wires, but one is 1.5mm and three are 0.5.