Thread: 1992 Subaru SVX ITX, Xenarc TS, DVD-ROM, Digital Audio Processor

badazzz install

The steering wheel controls were actually quite simple. I checked out the wiring diagram for the subaru svx and found that there are two wires controling the three buttons. One wire went high (positive) when one button was pressed, the other high when the other button was pressed, and then they both went high when the middle button was pressed. To make life easy I used a digital decoder and hooked up the two wires to it. I tied the enable line of the decoder to the cruise control ON button so that everytime I wanted to use the cruise control, my circuit would shut down and the car's cruise control would work just like normal.

The 2to4 decoder would read the inputs and make the correct output high accordingly. Decoder's are awesome because they can become pretty complex without the use of relays.

I bought a very cheap keyboard for $5, took it apart and traced to the keys I needed. The circuit acts by when the cruise control button is pressed, a hot key is pressed on the keyboard which activates the function on the computer ...pretty simple.

Once I have the correct output for each cruise control button I fed the circuit into transistors so that I can switch relays from the low current decoder. I decided to use three combinations:

CTRL+ALT+D - Volume Down
CTRL+ALT+U - Volume Up
ScrollLock - Activate Voice Recognition

ScrollLock required just one relay, but the ctrl+alt commands were different. I had to delay the relays hitting ctrl+alt so that those buttons were pressed before the D or U......if not the computer wouldn't know CTRL+ALT+key was pressed. I just threw a capacitor in parallel with the key buttons to delay them and it worked.

I hope that helped. I do have a schematic floating around somewhere, but it is quite basic:

Subaru Cruise Module -> Digital Decoder -> Boost Transistors -> Relays -> Keyboard Card from Keyboard.

Here's a picture:
http://www.expertwebcreations.com/pe...escription.jpg

Thanks for all the positive comments!! I've had a carputer for about 2 years now and I don't see myself ever buying another regular receiver! There's just so much more you can do with a carputer - it's insane. I'm hoping I can use some RTA equipment so that I can set up the vehicle for sound quality .......I know I have all the right equipment to do it so we'll see.

The SVX is an awesome car. AWD is definitely a plus, and the engine does have potential with it's base 230hp and 228lb-ft torque, fellow SVXers are currently working on superchargers and turbos for the H-6 motor.....it has the potential to beat an STi easily. I plan on swapping my automatic for a manual just as soon as it breaks ......I don't think it will take longer than a week to do since I do have access to a lift.

snmnetwork -> I checked out ur install and I think it came out really good!! Anyone else have links to their installs?