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Thread: obd2 help

  1. #1
    Newbie
    Join Date
    Nov 2013
    Posts
    1

    obd2 help

    Hello:

    I'm new here so if this the wrong place for this ?, please let me know.

    I'm working on a program for a obd2 "elm327"
    and need some help:


    Well I made some head way:
    With the one request: 01 05
    I can get the info I need, I know the byte(s) for the pid,data etc., but I need to use the "ATMA"
    and I'm a little lost:

    Settings= at L1,at H1,at S1,at AL,at SP0

    With the "at ma"
    I get:
    8A EA 29 20 A7 00 30
    AA EB 60 20 A7 00 E7
    E8 FF 10 03 B3
    88 25 29 07 00 97
    68 49 10 10 56 90
    E8 FF 60 03 98
    88 3B 10 43 80 0D
    48 FF 40 06 03 AC
    8A EA 40 A0 9E 50 26
    AA EB 60 A0 9E 50 2E
    8A EA 10 A0 8C 00 65
    8A EA 10 20 8C 00 A5
    88 53 10 04 C4
    8A EA 10 A0 8C 00 65
    4A EA 40 20 91 00 6B
    48 FF 40 06 03 AC

    What I need to do is find out which byte(s) is the pid, data etc.
    I have been looking at the " en.wikipedia.org/wiki/OBD-II_PIDs‎"
    Can't make heads or tails :-(

    Can you please HELP ?

  2. #2
    FLAC SNOtwistR's Avatar
    Join Date
    Nov 2009
    Location
    Keswick,On Canada
    Posts
    1,620
    Welcome to the forum! You placed your question in the right spot. I really can't offer too much help but maybe try this link http://obdcon.sourceforge.net/2010/06/obd-ii-pids/ There are a few good knowledgeable peeps here just might take some time to get a response as the forum is a little slow these days. Good luck SNO

  3. #3
    Newbie
    Join Date
    Jan 2014
    Posts
    5
    Quote Originally Posted by SoyEli View Post
    Hello:

    I'm new here so if this the wrong place for this ?, please let me know.

    I'm working on a program for a obd2 "elm327"
    and need some help:


    Well I made some head way:
    With the one request: 01 05
    I can get the info I need, I know the byte(s) for the pid,data etc., but I need to use the "ATMA"
    and I'm a little lost:

    Settings= at L1,at H1,at S1,at AL,at SP0

    With the "at ma"
    I get:
    8A EA 29 20 A7 00 30
    AA EB 60 20 A7 00 E7
    E8 FF 10 03 B3
    88 25 29 07 00 97
    68 49 10 10 56 90
    E8 FF 60 03 98
    88 3B 10 43 80 0D
    48 FF 40 06 03 AC
    8A EA 40 A0 9E 50 26
    AA EB 60 A0 9E 50 2E
    8A EA 10 A0 8C 00 65
    8A EA 10 20 8C 00 A5
    88 53 10 04 C4
    8A EA 10 A0 8C 00 65
    4A EA 40 20 91 00 6B
    48 FF 40 06 03 AC

    What I need to do is find out which byte(s) is the pid, data etc.
    I have been looking at the " en.wikipedia.org/wiki/OBD-II_PIDs‎"
    Can't make heads or tails :-(

    Can you please HELP ?
    no wonder you are lost... MA will show all the communications that's in that com line
    so, what you are seeing is data packets that are being exchanged between the ECU and other systems.

    What is the make, model and protocol you are using? SP0 is automatic protocol selection. you have to manually select each protocol and see who is responding. probably SP6.

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