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Thread: First GenIV LMG swap AFM data logs

  1. #1
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    Default First GenIV LMG swap AFM data logs

    First of all I have to say I am new to EFIlive and these are my first logs. It took me some time to get used to the pid selections and the correct dashboard.

    As you all know from my AFM thread we all thought that the missing brake booster sensor message is the condition which inhibits V4 mode...

    Hmmm, .... if my logs are correct I see two things.. one is AFMINHIB1- AFMA10 (Min time with all cylinders not met) easy thing, I parked the Thahoe a few minutes before I did a short test drive.. the V8 time was too short.

    the other condition is AFMINHIB2-AFMB10 (Axle torque limiting) which I cannot explain any further. Is there anything wrong with my logs... or is this just a beginners first time trouble?

    Here is my dash , PID selection and the log file.. maybe one of the experts can give me a hand.

    Thanks a lot Harald
    Attached Files Attached Files
    If nobody has done it before, somebody has to do it....

    1997 Tahoe 2dr 4WD
    2002 Alfa Romeo Sportswagon 2.0 JTD
    1982 Deutz Intrac 2004A
    2003 friesian Horse " Henry"

  2. #2
    Lifetime Member GMPX's Avatar
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    Default

    The results do look a little odd, we have downloaded your log (thank you) and will double check the PID definitions today.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

  3. #3
    Lifetime Member GMPX's Avatar
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    Default

    Looks like I had the PID defined wrong, Paul has fixed it and now it all makes sense. There looking over the log there has been several reasons the AFM has not kicked in.

    1 - ETC Tip-In Active
    2 - Vehicle Speed too Low
    3 - O2 Tests active
    4 - DFCO active
    5 - RPM not in range
    6 - Trans shifting
    7 - Throttle too high
    8 - MAP too low

    Now all of those are only on briefly throughout the log, so I think can be ignored as the source of the non functioning AFM.
    It's the next lot that never go away.

    1 - 4WD Low on
    2 - 4WD State Invalid

    Of course this related directly to the questions you have been asking about the 4WD inputs, I am still figuring out that for you.
    But I am confident once we can get it to not think it is in 4WD Low then it should start to work.
    The 4WDLow input (C1, pin2) should be switched to ground to enable it, is that what you are doing?

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

  4. #4
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    Default Afm

    Thanks a lot for your help Ross

    we've got the thing moving now.

    This log was made with a 2wd tun file in the tranny, 'cause of my trouble with the correct 4wd tun file. ( See that E38 stuck in wd low thread..)

    So it all seems to be related to that 4wdlo stuff. I switch C1, PIN 2 to low when in 4wdlo but it seems it has no influence. As soon as I have a 4wd tun in the T42, things are getting weird and I think the ECM sees a 4wdlo state all the time, even in 2hi.
    So the first thing to solve would be the correct 4wdlo state.
    Will we be able to get the 4wdlo message to the E38 in a conversion without the proper TCCM? Is the C1,2 the only way to tell the ECM that we are in 4wdlo or is the GMLAN involved?


    Harald
    If nobody has done it before, somebody has to do it....

    1997 Tahoe 2dr 4WD
    2002 Alfa Romeo Sportswagon 2.0 JTD
    1982 Deutz Intrac 2004A
    2003 friesian Horse " Henry"

  5. #5
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    Default PID definition

    Do I need new PID definitions to get the AFMINHIB1/2 to work correct?
    If nobody has done it before, somebody has to do it....

    1997 Tahoe 2dr 4WD
    2002 Alfa Romeo Sportswagon 2.0 JTD
    1982 Deutz Intrac 2004A
    2003 friesian Horse " Henry"

  6. #6
    Lifetime Member GMPX's Avatar
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    Do you want a 4WD tune in it or can your run 2WD?

    Below is the updated file, extract in to -
    \Program Files\EFILive\V7.5\Configuration

    You don't need to relog anything, it was just a display issue in the scantool, the logged data is still valid.

    Cheers,
    Ross
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    Last edited by GMPX; February 4th, 2009 at 11:13 AM.
    I no longer monitor the forum, please either post your question or create a support ticket.

  7. #7
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    Default 4wd tune

    Hi Ross,

    I have the correct 4wd tune from the same Tahoe (1GNFK13037R238413) and I would like to run it. I then have a matching set ( E38, T42 and BCM) of calibrations of that Tahoe.
    The ECM and TCM tunes were posted in that strange acting tranny thread
    (http://forum.efilive.com/showthread.php?t=9809&page=4)

    Do you think we can solve that 4wdlo issue? If I can do any checks, logs or something to help you pls let me know.

    Harald
    If nobody has done it before, somebody has to do it....

    1997 Tahoe 2dr 4WD
    2002 Alfa Romeo Sportswagon 2.0 JTD
    1982 Deutz Intrac 2004A
    2003 friesian Horse " Henry"

  8. #8
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    Default I forgot

    The 2wd tune in my T42 results in a not shifting tranny in 4wdlo, so I need to run a 4wd tune which results in a not shifting tranny 2/4hi...ha ha stuck in the mud.. I would say
    Ross, you are my best chance to solve that....;-))
    If nobody has done it before, somebody has to do it....

    1997 Tahoe 2dr 4WD
    2002 Alfa Romeo Sportswagon 2.0 JTD
    1982 Deutz Intrac 2004A
    2003 friesian Horse " Henry"

  9. #9
    Lifetime Member GMPX's Avatar
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    Quote Originally Posted by harascho View Post
    Do you think we can solve that 4wdlo issue? If I can do any checks, logs or something to help you pls let me know.

    Harald
    Well, remember, we aren't GM!, I can't guarantee this will ever get solved, it tends to go beyond what 'normal' tuning problems might be. Conversions are always a bit of a nightmare, even worse with these E38's etc.
    We will try to solve the situation, it will probably require us to add in more PID's to see what the ECM / TCM is thinking, there is every chance the 4WDLow switch can also be via a GMLAN message rather than the ECM direct input, again, I don't know the answer to that.

    Also, the first time I uploaded that updated file something went wrong, it was too small, I've reposted it, you better download it again.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

  10. #10
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    Default First log

    Here is my first AFM log.

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