Re: Vadis_guy on eBay
Joe Blizzard wrote:
> "Mike F" wrote
> > The mandated OBD-II protocols are only a small subset of what that box
> > will translate. OBD-II doesn't apply to the other system, like ABS,
> > airbag, climate control etc., these codes are also done through the
> > VCT2000. Also when software is loaded into various modules, it also
> > comes through the VCT2000 box.
> What's mandated is certain data that a vehicle must provide and a standard
> format for providing it. To be compliant, Volvo can make anything else they
> like available on the OBD bus in any format they like, as long as they
> include all the mandated stuff. The job of the interface box should be to
> provide a conversion between OBD interface's electrical characterisitcs,
> levels, modulation, timing and so forth, and those of the computer port so
> that data can pass between the two. The computer software is where the data
> gets sorted out to determine whether we're passing standard or proprietary
> information in any given chunk of data. At least that's how it works in most
> of the tools that are available for US cars that I'm familiar with. So the
> question remains: what's going on in the VCT besides signal conversion?
I don't believe there's anything else. Just more signals than are
required under OBD-II. They're just charging what the market will bear,
and some to cover their development costs.
Thornhill (near Toronto), Ont.
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)