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#30: 12-26-2012, 06:31 PM
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Title: Senior Contributor
Location: Atlanta, GA
Car: 1996 SVX L AWD
Posts: 999
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2012 Premium models have the CE617U1 HU. That uses a 16-pin socket for the aux input (and mic input). It uses a proprietary socket for USB (same as on recent Imprezas and Foresters).

Pictures of front, side, and rear:
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Model numbers:
  • Front: CE617U1
  • Clarion: PF-3380I-A
  • Subaru P/N: 86201AJ61A
  • Rear: ER61
  • FCC ID: AX2PF3380

Rear connectors, from top to bottom, left to right:
  • Brown = USB.
  • Ground lug = redundant chassis ground
  • "Pigtail" wire = mute input (for wired phone car kit)
  • Nissan round '2-pin' style antenna socket (dual antennas, for "FM Diversity" feature)
  • Black 20-pin = for OEM accessories (Sat radio tuner module, external CD changer, etc.)
  • White 16-pin = microphone + aux input
  • White 20-pin = power/speakers/SWC/etc.
20-pin power/speaker harness pin-out here (except 2012 Legacy/Outback with CE617U1 use pin 13 for the phone/Bluetooth buttons instead of pin 11). See this thread for USB and mic/aux.

Updated: To retain your USB socket with an aftermarket HU, Metra now offers a factory-made USB adapter, their AX-SUBUSB. I have those available, as well as the 2-pin round-style antenna adapter. To retain your factory aux jack, I make a harness similar to this:
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Most of the information on this page is applicable.
New 'parts needed' guide for cars with the CE617U1 here.

[Info I posted here previously: To build your own adapter to retain USB, see this and this.]

Last edited by SVXdc; 01-15-2017 at 03:23 AM..