What is OBD2 protocol interface

Discussion in 'Embedded Systems and Microcontrollers' started by ziyixue, Mar 25, 2014.

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  1. ziyixue

    Thread Starter New Member

    Mar 25, 2014
    hello all,
    I know a little about obd2 , I want to know What is OBD2 protocol interface ,hope you all tell me .thank you very much.
  2. t06afre

    AAC Fanatic!

    May 11, 2009
    It is a protocol for communicating with the onboard computer system in vehicles. It can be used for diagnostic purpose. I think that all new vehicles sold are required to support the OBD-II protocol. The OBD-II specification provides for a standardized hardware interface using a 16-pin J1962 connector. The latter connector is required to be within 2 feet (0.61 m) of the steering wheel with some exemptions. This allow for applications like using a smart-phone as an onboard dashboard car computer. However it should be noted that this site TOC will not allow for any discussion about using the ODB-II protocol. Then driving it is better to keep your eyes on the road, and not some app on your phone anyway
  3. PackratKing

    Well-Known Member

    Jul 13, 2008
    If you want to condense all the interference by government in the run of things, OBD II is the absolute most useful mandate to come from Washington DC... EVER

    The 85.00 I spent for my OBD II reader, was the best investment in a long, long time...

    Some try and say, that this computer-controlled-everything in cars nowadays is impossible for the Saturday Shade-Tree DIY mechanic to work on ? I beg to differ...

    I spent since I was 12, polishing diagnostic skills on cars ... 65 now, and OBD does a marvelous job of pointing you in the right direction... you must still employ the other skills to avoid " scattergunning " expensive parts replacement...
    Last edited: Mar 25, 2014
    shortbus likes this.
  4. MrChips


    Oct 2, 2009
    Wouldn't that be nice to have on a computer? A computer that tells you why it freezes?
    Then again, if the computer is so smart, why doesn't it just fix itself?
  5. bertus


    Apr 5, 2008

    I am closing this thread as it violates AAC policy and/or safety issues.

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