[Ovmsdev] OBDII ECU Documentation, and a request for help
casner at acm.org
Wed Mar 28 07:37:24 HKT 2018
A nit: The connector is more correctly identified as DA-26, see
On Tue, 27 Mar 2018, Greg D. wrote:
> Hi folks
> In a fit of prose, if not Shakespeare, I took a pass at creating the
> documentation chapter for the OBD2ECU task. Comments, corrections, and
> general feedback is requested. Is there anything significant missing?
> Mark, if this looks acceptable, can it be posted to the Google Doc, or
> send me an invite such that I can do so?
> Note that I don't have any reference material on the OBDII-to-DB26
> cable, other than the wiring. If we eventually have a purchase source,
> that should get referenced, or lacking that, perhaps pointers to where
> the connectors can be purchased? Placeholders are noted, but only
> that. For the EEs in the group, a question: I have both signal and
> chassis grounds connected together on the OBDII connector; should they
> be, or just signal ground?
> I think it would also be helpful to include a table of what metrics are
> available (supported) on what vehicles, as an aid to those who want to
> remap things for monitoring on an OBDII HUD or Dongle. A glance at the
> available documentation didn't turn up anything, so I took a first pass
> at the table. See the attached, which includes what I know of the
> Roadster's implementation (since I have one and have studied the code a
> bit). I would rather not try to guess at the other cars. Could the
> various vehicle authors contribute their columns to the table? Send me
> an updated spreadsheet, and I will do the merge.
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