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Just did a swap from the stock Pioneer headunit to one from a 2014 FRS which is the same unit that came in 2014 xB'x. Part number is PT546-00140. I've seen threads saying quite a few people have completed this swap. Everything powers up. THe radio tunes in stations, bluetooth works and connected to my phone, all my contacts and call logs show up. EVERYTHING works, but there is NO SOUND from the speakers. I've seen a couple threads with the same issue but there was no followup as to what the solution was. ANYONE know the fix? Or does anyone have the pin-out of the 2010 harness and the PT546-00140?
I used these adapters:

Metra 40-LX21 Antenna Adapter to Radio for Select 2012 - up Toyota / Scion
Genuine Scion Accessories PT546-00120-CH Wire Harness 28 pin to 20 pin converter
Genuine Scion Accessories PT546-74120-MC Microphone TOYOTA-2012V+CAM-01 + Pac CAM-TY11
Scion OEM Reverse Camera with Plug & Play Harness

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