Had some spare time the other day so I sent an email to OBD-OBDII.com, here is the reply: "Hi Edward, Our experience with the Toyotas in Australia, even right up to 2005 regardless whether pin 5 is populated or not, during all of our testing with our ELM327 we have never been able to get it to work. The last car we ran it on was a Corolla ZZE122 2005 and pin 5 was there but still no comms so we just gave up. We believe it's more than a wiring issue, Toyota just weren't interested on OBDII in Australia, at least not until mandatory from 2006. Let me know if we can help you with any data such as codes for your Gen7 or how to extract them. Cheers for now Glenn" So it seems the for the pre-2006 Gen7's made in Australia that we're just going to have to get a custom ECU if we want real-time data for stuff like data-logging and whatnot.