Found this too....
"Got a Sirius satellite radio system a couple of weeks ago. Works nicely, but on a trip to Charlotte, noted that several of the "dead" zones on the FM modulator came to life and made listening rather difficult!
So I picked up the PIE TOY03-AUX audio converter. Put it in, installed the RCA plugs to the Sirius holder, and now I get direct satellite feed with no worries of other FM stations horning in on the sound!
The center console came out with a snap, and once I figured it out, it went all back in rather quickly. I love the fact that this car is so easy to work on and that the single CD/MP3 player took the adaptor!
A quick hint. The wiring schematic in the PIE box, well ignore it. My head unit has four square-connector ports. Two are used up. The inside empty one is where this plugs in. The other connector of the audio converter just lays there -- nothing to hook up to it.
Thanks to Toyota for making the mod so simple. Thanks to ricoo25 for mentioning the PIE part and website, and thanks to basilisk4 for telling me the wiring was OK!
Cheers!"