Project: Logger for 94 -95 /discussion/
Very important info that I have found
https://www.thegalantcenter.org/show...2&postcount=12
Some good info about 1g loggers and software DLs
http://mmcdlogger.sourceforge.net/
As you know 94-95 galants have the OBD 1.5. and because of that the only way to know what is up in the ECU is by counting the CEL flashes, buying a $2000 Snap on tool, or going to the dealership. Well last two can really reach deep in the pocket, and the first one can really spit out the error code and thats it. In many cases, especially after some mods have been done, it is necessary to know the fuel trims, o2 sensor voltages, knock and many other options that a logger can provide.
/some info on OBD 1.5: http://en.wikipedia.org/wiki/On-board_diagnostics/
The good thing about Mitsubishi is that they didnt implement OBD2 codes, but stuck with the OBD1 codes. The only thing that got changes was the diagnostics plug. From OBD1 Mitsubishi plugs, now there are OBD2 plug where all wires were transferred and an OBD1 plug that has only one wire to it.
94-95 Data Link Connector Pinout
http://upload.wikimedia.org/wikipedi...tor-pinout.png
Pin 1: Diagnostic/ECU output (ECU pin 42)
Pin 2: Unknown/Usused
Pin 3: Unknown/Usused
Pin 4: Ground
Pin 5: Ground
Pin 6: TCU
Pin 7: Diagnostic Control Signal (ECU pin 43)
Pin 8: ABS
Pin 9: [Alarm]
Pin 10: Unknown/Usused
Pin 11: Unknown/Usused
Pin 12: SRS/Airbag
Pin 13: Cruise
Pin 14: Vehicle Speed
Pin 15: Unknown/Usused
Pin 16: Power
http://upload.wikimedia.org/wikipedi...tor-pinout.png
When Pin 1 is grounded, the ECU display DTC's just as the 1G eclipse.
When Pin 7 is grounded(most likely to Pin 4), the ECU goes into diagnostic mode and information from Pin 1 is used to exchange to a scan tool or logger.
On the 94-95 ECU pinout, the diagnostic pins are 42 and 43, going to pin 1 and 7 of the diagnostic plugs. After doing some research I matched the pins to the 1g ECU which are pins 1 and 2, and came up with some like this:
http://i1006.photobucket.com/albums/...conversion.jpg
And this is how it looks in real time:
http://i1006.photobucket.com/albums/...4/HPIM0818.jpg
http://i1006.photobucket.com/albums/...4/HPIM0822.jpg
Then got all the other components needed:
Mitsubishi OBD1 cable
http://i1006.photobucket.com/albums/...4/HPIM0816.jpg
Palm III xe device with cradle:
http://i1006.photobucket.com/albums/...4/HPIM0817.jpg
the whole thing:
http://i1006.photobucket.com/albums/...4/HPIM0824.jpg
Now I havent tested it yet, cuz i just got the OBd1 cable in the mail.
Thoughts and comments are welcome