serial adapter chip inside my ecu

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?

 

[Diego]

Is that acid I see on the board?

 

[Brunoboy]

it maybe be jumper wires........

 

That's something Jeff did for a few people back in the day. I had him do that to my ECU years ago. I think you're supposed to hook it to a pc for data logging via mmcd.

 

The rj25->db9 adapter that came with the car is the wrong gender to plug into my computers serial port, but it plugs into my palm cable.
I guess I will email Jeff O. about it. I couldnt find it on his site.

 

[cheekychimp]

Don't Palms and PCs use different adapters? If it was set up to work with a PC, I think you either need the correct adapter/cable for the Palm or get a male to female adapter to link it with a laptop.

 

i found a null modem adapter in my desk this morning. im going to try that when i get home from work today. i believe its just a matter of swapping pins 2 and 3 based on the device trying to connect.

 

[cheekychimp]

Yeah null modem adapter, I'm sure that's what you need for it. I couldn't remember the term for it earlier.

 

[Judder]

Quoting Anonymous:
That's something Jeff did for a few people back in the day. I had him do that to my ECU years ago. I think you're supposed to hook it to a pc for data logging via mmcd.



Apologies for the thread revival but noticed what looks like one of these serial boards on my 7201 ECU yesterday (I also have a 7202 but didn't see it on that one)

Anyone know / remember which pins were soldered where to connect to the RS-232 header per chance?? /ubbthreads/images/graemlins/smile.gif

Thanks!