"Real" Aux Input on 2007-up OEM Radios
Factory radios on some 2007 models have added a real Aux input to the 8-pin connector. Legacy/Outbacks removed the subwoofer output that was there on 2005-2006 models.
Front of Impreza/Forester radio, shown with new "ashtray module" (with the 3.5mm Aux input jack), and the interconnect cable:
The part number for just the ashtray aux pod is 86257SA010. The interconnect cable is
not available from Subaru as a replacement part. It's only available with the 2007 radio.
UPDATE: dajohnson53 did the legwork to find how to order the interconnect cable as a Clarion repair part. See his post
here (#323 in that thread). Note that if you have the similar radio from a Forester, you may need to modify the interconnect cable slightly to work. See my reply in that thread.
Rear of radio. Socket with green circle is for Aux input [and subwoofer output in some Foresters]. Other socket is new CeNET bus connector for the Subaru Sirius tuner module.
(Pictures posted by SilvrWRX in the thread OEM CD changer from 2007)
2007 Pin-out
Looking at the
back of the radio the pins are numbered:
4 3 2 1
8 7 6 5
Pin assignments:
Quote:
2007 Impreza (radio model C-124 Clarion PF-2868A-A/B):
1 - Aux Input - Left
2 - Aux Input - Right
3 - NC
4 - Chassis Ground (used for aux enable)
5 - Aux Input - Audio Ground
6 - Aux input enable
7 - NC
8 - NC
|
Quote:
2007-2008 Forester (radio model C-123 Clarion PF-2851B-A/B):
1 - Aux Input - Left
2 - Aux Input - Right
3 - Satellite (steering wheel) switches + [no wire on USDM car's harness]
4 - Subwoofer out + (speaker-level)
5 - Aux Input - Audio Ground
6 - Aux input enable
7 - Satellite (steering wheel) switches - [no wire on USDM car's harness]
8 - Subwoofer out - (speaker-level)
|
Quote:
2007-up Legacy/Liberty/Outback:
1 - Aux Input - Left
2 - Aux Input - Right
3 - Satellite (steering wheel) switches +
4 - NC
5 - Aux Input - Audio Ground
6 - Aux input enable
7 - Satellite (steering wheel) switches -
8 - Dimming Cancellation (BRIGHT mode)
Note: USDM Legacys/Outbacks use a different physical 8-pin connector -- the one shown in post #5, above.
|
When you plug a cable into the factory 3.5mm jack, the tip of your plug physically presses a switch inside the aux pod. That switch connects the "Aux Enable" line to
chassis ground (NOT pin 5 Audio Ground). That causes the HU to then allow you to press the CD/AUX button to toggle between those two modes. When nothing is plugged into the aux jack, the CD/AUX button only switches to CD mode.
When nothing is plugged in, the factory 3.5mm jack also shorts the audio L/R input lines to audio ground (so if you want to splice in a second audio cable in addition to the factory 3.5mm jack, you'll have to address this issue).
On this radio in 2007 Foresters, pins 4 and 8 are a 5th-channel, powered subwoofer output (still 65 Watts?), similar to prior years. It connects to a plain speaker in the rear cargo area of some Forester models.
More information and pictures in these posts:
OEM CD changer from 2007
2007 Spec B Radio information thread [this is for Legacy/Outback, which uses a different physical socket]
2008-up Pin-out (including 2011-up models without built-in Bluetooth and USB)
Pin assignments:
Quote:
2008-up Imprezas (models with 8-pin aux socket):
1 - Aux Input - Left
2 - Aux Input - Right
3 - NC
4 - NC
5 - Aux Input - Audio Ground
6 - Aux input enable
7 - NC
8 - NC
|
Quote:
2009-up Foresters (models with 8-pin aux socket):
1 - Aux Input - Left
2 - Aux Input - Right
3 - Subwoofer amp remote turn-on
4 - Subwoofer out + (line level, balanced)*
5 - Aux Input - Audio Ground
6 - Aux input enable
7 - Subwoofer out Audio Ground
8 - Subwoofer out - (inverted) (line level, balanced)*
* Starting in 2009, the subwoofer output on Forester radios (when present) changed to line-level. The sub out may not be present on any USDM cars. Originally I thought radios in 2008-up Imprezas had this too, but it appears that Foresters that did not have the rear powered sub and all Imprezas get a slightly different radio that does not have the sub output.
When present, the subwoofer output is balanced mono line-level. Pin 4 is positive polarity (in phase with the speaker outputs) and pin 8 is negative polarity (inverted voltage from the positive output) [EDITED- I previously wrote here that the negative output was 180° out of phase, but have learned that is not correct terminology]. The powered sub amp uses the two together to reduce noise. When connecting to most aftermarket equipment, you'll want to use only the + signal. It may help to also connect the negative polarity wire to ground.
|
Here are Subaru's installation instructions for the 2008 Impreza aux jack/harness (variation that goes in the center console), with part number:
2008 AUX Terminal Input Cable - Impreza (08M+) (H6210FG000) (PDF document)
2011-up Pin-out (models with phone/Bluetooth buttons on the steering wheel)
Pin assignments:
Quote:
2011-up Imprezas & Foresters:
Code:
_ ________________ _
| --- --- |
| 8 7 6 5 4 3 2 1 |
|16 15 14 13 12 11 10 9 |
------------------------
(viewing rear of OEM HU or wires side of car's harness):
Code:
Pin Description
--- --------------------------
1 Mic Audio In (+)
2 Mic B+ (+5V supply)
3 Aux In Left +
4 Aux In Right +
5 Subwoofer Amp Turn-On [only some Foresters]
6 Subwoofer Out + (positive) [only some Foresters]
7 Mic Shield [NC on most cars]
8 NC
9 Mic In Ground (-)
10 Mic Detect
11 Aux Audio Ground
12 Aux Enable
13 Subwoofer Shield [only some Foresters]
14 Subwoofer Out - (inverted) [only some Foresters]
15 NC [Parking brake on HUs with 4.3" screen]
16 NC [Reverse Gear on HUs with 4.3" screen]
See this thread for more info about the OEM amplified microphone.
|