I think I read somewhere that the Toyota iso connector has a security face in front of it, so that theives can't get to your head unit - unfortunately this also means that you can't pull out the empeg, which is definately required.... Do a search on toyota on this BBS - you'll see the actual posts and how some users got around the problems..
-mark

MK2: 36gb
Tivo 90gb
Computer: 120gb disk space
...I think drive manufactureres love me!