2002 E46 320d - MAF characteristic

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  1. 2002 E46 320d - MAF characteristic 
    #1
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    kokosafe's Car Details
    Model of Car:
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    Hello Everybody,
    A few days ago I've send my injectors to diagnostics and changed one of them but my car still produces a tinkle noise while I'am accelerating (and it has a little power loss in lower RPMs).
    So I've created a little program which connects to EDIABAS server and collects informations (live data) from the car. I've checked air-mass, intake pressure and rail pressure. Only the air-mass shows differences. I've measured my brother's E60 too to compare the results and his air-mass looks ok.
    I've tried another new MAF with the same BOSCH code an it has the same difference too. I've reset the MAF adaptation values in DIS but the same results. Here are the characteristic. My characteristic has a constant offset with both of the MAFs but I don't know why. Any idea? (Blue is the measured and red is the desired value)
    Attached Images
     
     

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    If you have easy DIS, see if you can go into CIP coding (or use SSS), and look for the section on recoding a car for a different MAF.

    It may have been changed at one point, and not coded correctly for it, so it needs the ECU to be updated with the correct offsets
     
     

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    Yes, I have DIS.
    What is CIP coding?
    I have reset the values under MAF Adaptation but I cannot set new values there.
    Is there another section for MAF recoding?
     
     

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    CIP - Coding Individualisation Programming
    It's a tab in the easyDIS, which does what SSS now does.
    Newer version of DIS cut that feature off and you had to use SSS for all programming stuff, but older DIS systems still have it.

    Try following the same thing as the injector coding you did, as MAFs can be the same, and they need the ECU updated so it knows how to deal with the MAF.


    There's a chance someone swapped it before and that's why 2 MAFs the same show similar problems (offset)
    Again, this is something I haven't done, but I know it exists for some BMWs, and your should be the same.
    You might need to follow the test plans and get the location of the MAF code from TIS.
     
     

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    Yes I've heard that there are 2 main types of MAF sensors which are not interchangeable without coding, but I cannot find any option in DIS for this. I found only two adaptation values which I can reset but not set (it said that the ECU is computing this values but since I've reset it, it is constantly 0).
    Is there anybody who knows how to code a different MAF. I should give it a try.
     
     

  11. MAF Problems e46 320d 2001 
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    Hello, i have the same problem i have replaced the with a original part OEM and i don't know what to do in order to get it run.
    i have measured with DIS MAF values and for example at 5000RPM MAF should have 1000... i have only the half (around 480)
    i have also updated the DDE using sss but bo change
    i don't know what can i do for this MAF activation
    Tnank you
     
     

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    Hello MaximF,
    Can you tell me how did you updated the DDE with SSS. Is SSS part of DIS or is it a completly different software? I could only reset the stored adaptation values in DIS but now the DDE cannot relearn it. I have an EGR bypass which of course writes an error code to the ECU. Could it prevent the DDE to relearn the new values?
     
     

  13.  
    #8
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    Ok, back again. I have a little a time so I've investigated the problem again and finally I figured out what caused the problem. The deleted EGR. After I've placed back the EGR the offset in the measured and desired values disappeared. It's quite logical, if the EGR is disabled the turbo have to suck more air to produce the given pressure on the MAP sensor so the MAF sensor measures more air than desired. Since than the boost is building on a little bit lower RPMs. It seems that in my case the EGR delete is not a good option :-)
    I've checked the MAF adaptation values in DIS after 300kms but they are still zeroes . . . strange! If I have some time I'm gonna try my other MAF :-D
     
     

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    Hy,

    I've uploaded my Ediabas Live Data logging program to: http://beemer.no-ip.org/EDIABAS_LiveData_logger.zip
    You can download and use it! Please read the usage.txt :-)
     
     

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  17.  
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    Hi, /Szervusz/

    First of all tanks for the work !!!

    I have tested your <logger> and there two things that didnt work on my XP:

    1 - Output file is not created every time program start (step 5);
    [COMMON]
    ECU = D50M57C0
    LOGFILE = C:\TEMP2\D50M57C0.csv
    SHOWRESULT = 1
    FIELDNUM = 3

    2 - Number of cycles only 1024 ???

    Need some help

    THANKS AGAIN
    Last edited by kanon; 17-05-2012 at 12:11.
     
     

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