Quote:
Originally Posted by JIMXB
Scion Pioneer base headunit T1819 or part#(PT546-00120)
 example SL discussion, which may have some hints:
http://m.scionlife.com/forums/showthread.php?t=216686
1. Bluetooth microphone part PT546-74120-MC
2. M
2USB connector cable part# PT546-00120-US
INSTALL: HU to the usb port
http://www.trdsparks.com/install/PT546-00120inst.pdf
2.22
Hope this help hop3.33.3.33333333333333333333333333333333333333333333333333333333333333333333333333
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You will also need the 28 pin to 20+8 conversion harness, AND an antenna adapter.
Take the USB to radio connector cable (mine said "tC USB conversion"), cut it on the end opposite the radio. strip the 4 wires- 2(purple/brown) are foil wrapped and thinner than the red and black wires.
Find a cable with a USB female end. I used a USB extension cord i had laying around.
Otherwise youll need toyotas extension cable, and USB outlet- close to $200 just on those 2 things.
Cut the male end from the USB extension cable, and strip the 4 wires. red/white/green/black should be the order of the USB pinout.
Splice together red to red, black to black, purple to white, and green to brown. I soldered the connections too. Thats what youre going to be plugging in your (up to) 256GB thumb drives, etc.
You can run the cord anywhere you want, i just wrapped mine up and tucked it next door inside the glove box.
Pandora comes in loud and clear via bluetooth, as well as winamp on my cell phone. the HD stations are worth it on their own.
If you own an xA or 1st gen xB, you will NEED the 4 proprietary cables for
microphone (if you want bluetooth),
wire harness adapter (plug and play),
antenna adapter(if you want HD radio),
And USB if you want to use that function.
It looks like a boring factory stereo, so thieves wont be interested.
And now that youve got the wiring and plugs converted to 2012 standards, you should be able to use any Scion stereo for the foreseeable future!