Thanks michbound. So, I have been reading that i can convert the signal to rs232 using the elm322. I am looking at a schematic at
http://pinouts.ru/Converters/obdii_cables_pinout.shtml, its the middle schematic. Do i really need that whole circuit. From the radio, I have one pin that says pci bus. Can I just power the chip with five volts and a cap between pin 1 and 8 to ground. Plus the oscillator sub circuit and then feed the signal through pin 4 and send it to where I need to go from pin 6. I dont need to write to the bus at all. Thanks for all you help. -MG