View Single Post
Old 11-25-2008, 03:43 AM
b3lha's Avatar
b3lha b3lha is offline
Phil & Belha
Join Date: Aug 2001
Location: Alcyone Limited, Buckinghamshire UK
Posts: 2,671
Re: STOCK radio aux/input hack? has it been done?

I did this some time ago, but I have replaced the stereo now. The 13-pin connector is easier to play with than the 8 pin. The problem I found was that I was powering my mp3 player off the lighter socket and you get a loud rpm whistle over the music. Better to use the filtered power provided by the radio and step it down to what you need with a voltage regulator.

Below is the connector from the P411 radio to the P511 single slot cd player or P611 cd changer controller:
Originally Posted by
This is for Panasonic model P113 or P114 80W Cassette/Receiver.
As labeled on the bottom of the unit: Model No. 86201AA350, Ref. No. CQ-LF1111Z.

As Numbered on the female DIN socket:
Pin 1 NC
Pin 2 Line-In Right
Pin 3 NC
Pin 4 Line-In Left
Pin 5 Signal Gnd
Pin 6 CD Play (or Remote Amp In) (send 12V to this to activate amp for remote device)
Pin 7 NC
Pin 8 Mute (input)
Pin 9 Acc Out (filtered power)
Pin 10 Batt Out (filtered power)
Pin 11 CD Stop (input)
Pin 12 NC
Pin 13 Gnd

The story behind this pinout is a long one--suffice it to say that Panasonic SUCKS. They consistently were annoying and completely uninformative to me and my Subaru dealer in our attempts to find the pinout of this connector. In the end I ended up disassembling the whole stereo, reverse-engineering the schematics, and finally figuring out from them what each pin on the connector did. For pins 8 and 11, I'd like to thank Brian S. for his help in identifying them! Probably the logic levels to those two pins are 0-12V just as for Pin 6, but I haven't verified this.
Below is the pinout from the JDM P611 cd changer controller to the trunk mounted cd player on models with this option. Also applies to the combined single DIN CDcontroller/Radio/Cassette fitted to european models and the subaru/panasonic unit used in the Legacy. READ THIS WEBPAGE.

Originally Posted by
Pin 1 = CD-C data line. (you need to transfer the bytes on this line)
Pin 2 = CD-C clock (you need to keep a 8uS clock signal on this line 4us on 4us off)
Pin 3 = Acc (not required for comms) Note to self: Supply voltage (12V unreg)
Pin 4 = CD-C strobe (you need to send a 4us pulse after the first byte and last byte of packets)
Pin 5 = RM Data (this line has data back from the head unit)
Pin 6 = Acc (not required for comms) Note to self: Supply voltage (12V unreg)
Pin 7 = NC (not connected)
Pin 8 = GND (you require a common ground to head unit)
Originally Posted by
I often get the question if it's not just a question of shorting two pins. The answer is NO - never try it, it will not work! The radio must receive a valid signal to enable the CDC inputs. If it does not, the CDC input is disabled within a second.
Subaru ECU and TCU Website
1992 Alcyone SVX Version L
1992 Alcyone SVX Version L
1994 Alcyone SVX S40-II
2004 Subaru Legacy 2.5 SE Sports Tourer
1996 Subaru Legacy 2.2 GX Wagon
1988 Subaru Justy J12 SL-II

Last edited by b3lha; 11-25-2008 at 03:54 AM.
Reply With Quote