This paper describes a multiplexed communication protocol matched to vehicle diagnosis, which has become more complicated due to the greater sophistication of Electronic Control Units (ECUs). The diagnostic data link must be both flexible enough for complex applications and economical enough for most ECUs.First, an asynchronous communication method controlled by an external clock, one function of a CPU with UART, is employed to minimize ECU hardware cost. Second, a polling/selecting method comprising a set of diagnostic commands and a practical data link procedure is developed to minimize the ECU software burden. The result is a cost effective, easy-to-protocol.


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    Title :

    Development of Diagnostic Data Link Protocol


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1989



    Publication date :

    1989-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Development of diagnostic data link protocol

    Takai,H. / Futami,T. / Kanegae,H. et al. | Automotive engineering | 1989




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