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ECMlink connectivity problem RESOLVED

Posted by gsxitement, Feb 13, 2020

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  1. gsxitement

    gsxitement Proven Member

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    I've been doing a wiring delete on my track only time trial car. Got the car fired up yesterday. Runs ok. My problem is link won't connect. At my DLC, I have 12v on pin 16, 5v on pin 1, pins 4 and 5 show good ground, and I've got good continuity through the pink data wire on pin 7 to the ECU. I get a "port refused to accept required bitrate" message. Also, my little pocket scanner won't connect either. I can't see the ECU being bad cause it just sat in my house while I did this work. I will add, that everything is custom. My own fusebox, my own relays. The MFI relay and fuel pump relay are controlled by switches on the dash panel. Any insight or recommendations would be appreciated. Thanks again. IMG_20200212_193353.jpg
     

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    1998 Mitsubishi Eclipse GSX
    11.930 @ 119.000 · 2G DSM
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  2. motomattx

    motomattx Proven Member

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    For some reason its not receiving the handshake back from the ecu to prove that a connection has been made, what ecu are you using?
     

    Drag Race Build 3K  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  3. gsxitement

    gsxitement Proven Member

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    The same ECU I've been using for 9 years. Worked fine at NJMP in August. Got the car home and started the wiring project in October. ECU just sat in the house until last month when we started routing wiring.
     

    2K  9

    1998 Mitsubishi Eclipse GSX
    11.930 @ 119.000 · 2G DSM
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  4. motomattx

    motomattx Proven Member

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    For some reason its not receiving a handshake back from the ecu to prove that a connection has been made between them, what about pin 15? thats the low data line, also pin 16 is battery positive, not switched ignition if thats what you have running to it.
     

    Drag Race Build 3K  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  5. gsxitement

    gsxitement Proven Member

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    Ahhh....pin 15 isn't hooked up. That's gotta be it. That's crazy cause in all my research no one mentioned Pin 15 at all. Even when I look at the wiring diagrams. I'll have to look into that when I get home from work. Pin 16 is hooked up to my fuse box. Being that it's track only, when I turn the master switch on, it's sending power to that fuse box and anything that's not on a switch or relay gets powered up.
     

    2K  9

    1998 Mitsubishi Eclipse GSX
    11.930 @ 119.000 · 2G DSM
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  6. gsxitement

    gsxitement Proven Member

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    Off the link website Screenshot_20200213-083812.png
     

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    1998 Mitsubishi Eclipse GSX
    11.930 @ 119.000 · 2G DSM
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  7. motomattx

    motomattx Proven Member

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    My point is that you need data on two lines, high and low depending on which protocol your using will tell you which two pins on the obd connector to use, it looks like pin 56 on the ecu is the request line that your not using maybe? the picture below is just to reference that two lines are needed, not necessarily your own obd connector, if I seem to be babbling ignore me, I woke up early on just a few hours of sleep after having a root canal yesterday so I might be slightly out of my mind.

    [​IMG]
     
    Last edited: Feb 13, 2020

    Drag Race Build 3K  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  8. gsxitement

    gsxitement Proven Member

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    Lol!! That's brutal. Root canal sucks. And I'll take any direction I can to save the ECU from being bad which I don't think it is. I'll definitely look more into that pin when I get home. I'm not gonna run the car again till I get this sorted. Really appreciate the info. Was kinda in the dark seeing as how the car runs, but won't communicate with anything. Hoping it's something dumb.
     

    2K  9

    1998 Mitsubishi Eclipse GSX
    11.930 @ 119.000 · 2G DSM
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  9. gsxitement

    gsxitement Proven Member

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    You know what? I think the pinouts you mentioned don't apply to me since I'm on a 95 ECU.
     

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    1998 Mitsubishi Eclipse GSX
    11.930 @ 119.000 · 2G DSM
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  10. motomattx

    motomattx Proven Member

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    http://www.dsmlink.com/images/forums/2GECUPinout.pdf

    As I was saying earlier, pin 56 is the request line, data is requested on 56, data is then output on your pink wire on 62.
     

    Drag Race Build 3K  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  11. EVLGSX

    EVLGSX Proven Member

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    Ive seen this message when the drivers need to be updated, but if your pocket scanner is doing the same thing then its unlikely. Only time Ive ever seen it though.
     

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    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  12. gsxitement

    gsxitement Proven Member

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    Figured it out. Pin 82 which comes from the ignition switch when the key is in run wasn't getting 12v. Since I no longer run an ignition switch, I had to run a separate 12v line and splice it into the B/W wire at pin 82. I did that, turned on the MFI relay and it works.
     

    2K  9

    1998 Mitsubishi Eclipse GSX
    11.930 @ 119.000 · 2G DSM
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  13. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    Thanks for following up with the solution. Now if anyone else has this issue, you guys are ones that figured it out. That is what is so great about this forum! :thumb:
     

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    1990 Eagle Talon TSi AWD
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  14. gsxitement

    gsxitement Proven Member

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    Absolutely. The combined experience of everyone on here is such a deep well of knowledge. Hope it helps someone in the future.
     

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    1998 Mitsubishi Eclipse GSX
    11.930 @ 119.000 · 2G DSM
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