13 replies to this topic

[cal198]

Just curious if anybody has a diagram of the diagnostic port on early Evo's. Or also if anyone knows through an engine conversion from 1.8t to 2.0t if such wiring would be changed or modified in the swapping of engines.

To explain, I'm trying to get the PDA cable from meek and run the MMCD software to diagnose. I have a Mitsubishi adaptor plug at work which does fit but doesn't react at all (doesn't even show power through it's current arrangement). So I was contemplating the possibility that the plug was inactive or wired incorrectly.

[leadfoot]

can you take a look at you white plug next to the fuse box and tell me how many pins it has?

 

this socket

https://www.dropbox....socket.jpg?dl=0
 

 

i have successfully used a std obd scan tool on both my cc gsr 4g93t ecu and the evo 1 4g63T ecu but my diag socket is different to most. mine has an obd2 plug near the hood catch release an that the white plug pictured and i need to use both to initiate communications

[cal198]

Yes that's correct. I have that exact plug (same 4 terminals) but no others that I can see around that same area

Edited by cal198, 11 February 2015 - 09:37 PM.

[leadfoot]

ok mikey or someone else might be beter suited to helping you. mine is different in that that white plug pictured only has 1 pin in it and that to initiate comms you need to use both the obd2 std conector and the 16 pin obd1 connector at the same time through a multiplexor

[jack be nimble]

Cant you just get the ecu light to flash your fault codes. I cant recall how to do it tho

[leadfoot]

he not trying to initiate a fault scan he trying to use a logger different stuff

[jack be nimble]

He said he trying to diagnose with mmcd.
nothing in the op about logging

[evo-gsr]

Correct...^
Only certain ECU communicate with the mmcd also.
What are the numbers on your ECU ?

[jack be nimble]

I have a diagram done from when I changed my ecu to gsr.
im sure it only had 1 wire connected

[cal198]

Hey guys, cheers for the help. From what I can determine, the 4 pin ports aren't compatible with mmcd. I'm sure I could modify it to suit but probably not worth it as a haltech is on it's way to me soon. From what I've learnt, the flashing diagnostic route has given me a fair understanding. Logging was just going to confirm everything 100%

[BMGTZ]

on the series two GSR aust delivered models. there are often an OB1 and an OB2 plug. In most the OB1 plug has a single wire and that is just an earth....but without it connected, nothing works when trying to log or check error codes

[leadfoot]

yeah brian thats the way my lancer is too it's a 93 build 94 comply cc lancer coupe.

in it i have been able to with a snap on scanner been able to diagnose the std ecu a gsr ecu and an evo 1 ecu all using the same protocols. it's worth noting the flash method does not work on this styel of diag port

[CLuTZ]

If you are using an EVO ECU, it won't log. GSR ECU's work fine. I contacted Hamish from EVOscan several times to ask him to address the issues but to no avail. Seems that they only care about late model EVO's these days

[cal198]

Thanks guys, sorry I'm a bit late on this one. Looks like I'm stuck with flash codes *sigh*