A few months ago, in an effort to make the OEM iPod setup work with my T1809 head unit, I installed the iPod connector & wiring from a 2008 xB (same year as my head unit) in my '06. It never worked despite days spent painstakingly reviewing everything, and I assumed that my iPod was the wrong version.
This weekend I took one of my kids to a birthday party, only about 5 minutes from the junkyard... so I thought I'd kill the time there. I knew that a new '06 xB had come in, but it didn't look like it had anything I wanted on it, so honestly I wasn't even going to check it out.
To my utter delight, this new car had the iPod connector, so I grabbed that, along with the short cable that connects to the existing wiring underneath the floor console... and that TOTALLY fixed the problem!! My iPod immediately showed the Scion logo, and started cranking out tunes.
Realistically I did not need the ipod connector… I have Alexa in the car already, so I can listen to anything I want just by asking… but Dang it, I wanted it to work! And it finally does!