so i bought a galant a few months back and when i pulled the ecu out to swap chips i found a little addon card inside it with a max202cpe ic on it. its some sort of serial transceiver. theres a rj25 wire coming out of the ecu and the car came with a little adapter to go from that to male db9. i hooked up my palm and tried mmcd and pokedyno and couldnt get anything to communicate.
i also did some searching and cant find anything like this and theres no markings on the little pcb. has anyone seen this before or know how to make it work?