Hope this helps. Here's the AE86 side:

Here's how to find which terminal is what on a TPS (AE111 side) with a multimeter:
http://www.megamanual.com/v22manual/mwire.htm#tpsCome down to the paragraph starting "To hook up your throttle position sensor..."
I *think* I've read that the 20V TPS is the same as the US 5VZFE TPS, if so here's the best pinout of that I could find (diagram from a 99 4Runner V6 so disregard ECU pin #s):

VC is the 5V reference, VTA is the TPS signal, and the E2 is signal ground.