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Newbie question about ODB I and II

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  • Newbie question about ODB I and II

    I undertand that all cars after 1998 have odb II interface, but do all cars before that date have OBD I ?

    If this is the case, what information can you get from an OBD I interface.

    I have a Mazda 121 96 mod so i probably dont have a obd ii in my car, but maybe a OBDI ?

    Thanks.

  • #2
    Correction almost all cars AFTER 1996 are OBDII compliant. Check under your hood. It should say something about OBDII.
    What im curently listening to.
    My complete carpc setup

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    • #3
      Originally posted by osirisdon
      Correction almost all cars AFTER 1996 are OBDII compliant. Check under your hood. It should say something about OBDII.
      Sorry, the car is actually a 1995 mod

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      • #4
        before 96 the companies were allowed to use whatever they wanted, so there is no real "rule". It is a form of "mecs" but I am not very familiar. All I know is when I Ford Probe comes in, we grab the Mecs adaptors and try to figure out what the heck they are talking about
        2005 Ford Focus ST

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        • #5
          OBD 2 is the required data transfer protocal all new automobiles must have to be sold in the US after 1998 the test jacks are all different but the protocal is the same on all makes and models no matter what the protocal OBD 2 OBD 1 MECS ect. the info you can get is any and all sensors on the engine and tranny and also the speed sensor if it is electronic on some high end cars like BMW's and Benz's and auto union aka AUDI you can also start the car shut it off control windows and the sun roof lights power seats ect. the list goes on and on but with cars made in the us and asia it is only for testing the drive train now if you want to do these things you can do it with other devices contact the people at http://www.i-zone-3.com/newindex.htm they sell auto pc's with voice control and the software and hardware to link to OBD and other systems in cars to control them also check out http://www.dashpc.com/ 6 months ago they were finishing up a porject that offered linking to the on board systems of many cars I also heard a roumor that you can get a plugin for Girder the ir remote program and use the pc's printer port to interface to a OBD 2 system but I have not found any proof that any such plugin was ever available maybe it was just a roumor and nothing more best of luck to ya!!!

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          • #6
            geez port 20, that's a big post. Suggestion: try breaking up your ideas into paragraphs or by seperating them by a few lines. Also, OBD II is in all cars beginning in 1996, not 1998.

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            • #7
              "the test jacks are all different but the protocal is the same on all makes and models no matter what the protocal OBD 2 OBD 1 MECS ect."

              also, to clairify, the OBD2 connector is the same, but different protocols are used, and becuase of this, different pins will be used for different manufacturers designs. FOr example, if the car uses a ISO network, there are certian pins that are used, no matter who the manufacturer is, but the pins can only have that function. that makes it to where DEQ for example can test any car with an ISO network with the same test unit. The manufacturers cannot simply choose what pins go where anymore. Before obd-2, this was not regulated, and every make was a little different.
              2005 Ford Focus ST

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              • #8
                96infmsM3 98 was the fedral mandate before 98 yes most auto makers had switched because the mandate was 96 but had been moved back to 98 for some reason and there are a few cars that didn't switch till 98 but I don't remember witch ones


                and speed racer is right the plugs are the same protocal is different sorry guy's


                OOOOOOOOO YA 96infmsM3 SORRY TO HEAR WE NEED SPECIAL WRITING SKILLS SO YOU CAN FALLOW YOU WANT ME TO GO SLOWER DOES YOUR MOMMY STILL CUT UP YOUR FOOD FOR YOU

                JUST KIDDING YOUR RIGHT I WILL TAKE YOUR ADVICE

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                • #9
                  I found an interesting car diag site try www.v-techuk.com I bought from them in the past they are not bad

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                  • #10
                    I don't know much about cars other than Honda, but they used OBD I from 92-95. 88-91 used ECUs unofficially called OBD 0. (Really they aren't OBD, but I think they are similar but less advanced than OBD I & II.) Models older than 88 are non-OBD.

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