Hyundai Elantra CD AUX in

**yaohui** · 05-23-2006, 10:09 PM

I have a Hyundai Elantra , I want to add a AUX in for the car CD headunit. The modle of the CD headunit is H260 with a 13-pin interface(1 CDC R(+)\2 CDC R(-)\3 CDC L(-)\4 CDC L(+)\5 CDC TX(DO)\6 CLK\7 CDC RX(DI)\8 D-GND\9 BACK UP(+)\10 A/GND\11 P-GND\12 N.C\13 ACC B(+)). It seems use SPI to connect headunit and CD changer.
I have a problem of the voltage, the voltage between ACC and D-GND is 7V, but if connect ACC and D-GND with a 7805, the voltage will change to 3V.The voltage between ACC and P-GND is 12V, the voltage between ACC and CLK is 12V, but the voltage between CLK and D-GND is -3V.

**fenton** · 06-11-2006, 08:09 PM

any luck with this? I have an '05 sonata with the cd/cdc button too. There was talk about a group buy for an aux in adapter for this HU on another forum, but they all sold out before I found it. I would love to know if there is another source for these, or if the Kenwood CA-C1AX might work on it.

**yaohui** · 06-12-2006, 01:34 AM

Any progress......

**cobase** · 08-13-2007, 12:23 PM

There are CD-Changer-to-Aux-In adapters on sale on eBay for OEM Elantra head units. It worked on mine but 1) you can't have a CD in the player and 2) sometimes it automatically switches to radio when starting the car (does it see no signal/voltage and switch automatically?) I dunno.

**yaohui** · 08-13-2007, 10:56 PM

Originally Posted by cobase

There are CD-Changer-to-Aux-In adapters on sale on eBay for OEM Elantra head units. It worked on mine but 1) you can't have a CD in the player and 2) sometimes it automatically switches to radio when starting the car (does it see no signal/voltage and switch automatically?) I dunno.

What's the name of the adapter?

**cobase** · 08-14-2007, 06:40 PM

I'm not sure it had a brand name; I got it off eBay. Here's a thread on the Tiburon forums that discusses something that looks identical - plugs into CD Changer, goes to box, comes out as RCA. I also had to buy an RCA-to-1/8 Stereo adapter from Radioshack.
http://www.hyundai-forums.com/t8281-...-car-audio.htm