Is there a free overview of the ISO 9141-2 (K-Line) protocol? I'm looking for basic handshaking info (master control), structure of a frame, etc.

The only information I could find was a for-sale document from the ISO standards body. I don't need electrical details, just protocol overview.

  • Have you looked at this: github.com/handmade0octopus/ds2
    – jwh20
    Jan 17 at 19:54
  • An initial Google search returned many hits, using 'ISO 9141-2 (K-Line) protocol' as key words. I would presume this isn't proprietary to any vehicle manufacturer and available on the internet from almost any good source of info; electronic sites sterilizing in OBD II protocols/pinouts, some vehicle manufacturers with extensive service manuals, electronic communication sites able to describe in details serial and parallel comms (OBD II, canbus), etc. If you have difficulty finding these sites, I or anyone else can post links to them.
    – F Dryer
    Jan 19 at 21:31


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