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Thread: Easy way

  1. #1
    Variable Bitrate 4u2n's Avatar
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    Exclamation Easy way

    Hi


    Witch is the easy way to make a OBDII interface in ISO standart ??

    OBDII <> RS232
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  2. #2
    Maximum Bitrate
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    As far as I understand this is not possible because of the communication method. I forget the exact number specifics, but it has to do with the initialization sequence that is out of sequence.

    Basically, if the bus is normally at 4800 bits/s, the initialization rate is something like 3 bits/s for i forget how long. If i get find the details again, i'll post it up.

  3. #3
    Raw Wave god_of_cpu's Avatar
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    If you want to assemble your own interface, you can buy an ELM323 chip which is ISO, for around $20 and assemble the rest of the circuit yourself. There are instructions online. It will probably cost you at least another $20 for the cabling and other parts which you'll have to buy regardless of which way you do it, but making your own conversion chip from scratch will be very complicated and probably end up costing you more then $20 in the end.
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  4. #4
    Variable Bitrate 4u2n's Avatar
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    Quote Originally Posted by god_of_cpu
    If you want to assemble your own interface, you can buy an ELM323 chip which is ISO, for around $20 and assemble the rest of the circuit yourself. There are instructions online. It will probably cost you at least another $20 for the cabling and other parts which you'll have to buy regardless of which way you do it, but making your own conversion chip from scratch will be very complicated and probably end up costing you more then $20 in the end.
    Where can i buy the cable and the Elm323 chip ??
    Plan for project = 100%
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    Built...................= 99%
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  5. #5
    Variable Bitrate stimps's Avatar
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    look up elm electronics.
    they have a online shop that post the chip to your door within 14 days.
    I made a VPM one and also a ISO one. Both worked great.
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  6. #6
    Raw Wave god_of_cpu's Avatar
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    I got mine from scantool.net
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  7. #7
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    I believe u'd better buy a direct k-line interface...
    ...on my iby (130cv my02) vag-com is doing miracles... while elm's is not... I mean it works, but cannot modify a lot with generic scan tools!

    If u like to wire and solder ur own circuit I've got one using a Motorola chip: actually I'm using this and it works great (but I bought it from www.skpang.co.uk)

  8. #8
    Variable Bitrate 4u2n's Avatar
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    thanks for the info I check et out and make a choice
    Plan for project = 100%
    Part the project. = 100%
    Built...................= 99%
    Finish.................= 99%
    Install ...............= 99% -50%
    Ditail at 4u2n.dk
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  9. #9
    Newbie fearthepenguin's Avatar
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    Might want to rethink

    I hate to be a stick in the mud, but maybe you should consider buying a prebuilt unit. Don't be offended, but if you don't have the required electronics expertise already, you really dont want to use your cars ignition system as your first experience. But if you still want to try to do your own, I would price out how much a new computer will cost you from a junk yard (be sure to check and make sure it actually includes the chip, as most yards pull them and don't include the chip with the computer) and see if it's still cost efective.
    Jason
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  10. #10
    FLAC samc's Avatar
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    You own a seat so why not just buy the vagcom? OR that ebay cable or that www.obdtool.com connector?
    Mine needs to be updated.

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