Equus OBD II 3100, and Auto X-Ray EZ-Scan 6000( I get to borrow this
sometimes..) For straight code retrival the Equus 3100 is very simple and
easy to use. The Auto X-Ray is more involved and can do a lot more stuff..
Very pricey unless you are using it to earn a living.
I have it...the interface is a little primitive but it functions well and
has several functions (such as enhanced parameters and KOEO and some ER
tests) that many of the other low cost packages don't. The only issue I'd
be concerned with is future upgrades...software hasn't been upgraded in four
months and the author seems to have vanished (there's always a "closed for
vacation" on his website).
I got a reply to a question last month. There were also updates since
the last time I checked (which was January)
There is no need to issue updates that don't add any functionality.
I think that this system is one of the most cost effective around.
Personal e-mail is the n7bsn but at amsat.org
Isolation is not needed as it is the nature of the beast.
Occasionally frames will be received with a bad CRC. This does NOT
indicate any type of hardware/connection failure.
The interface between RS-232 and SAE J1850 VPW is subject to strict
timing constraints. Because the interface is primarily software,
sometimes those timing constraints cannot be met. The failure of the
software to sometimes meet the timing constraints will be observed as
There are several applications that run in directly in DOS (as does GM's
own development environment) and therefore reduce or eliminate CRC
errors and improve timing accuracy. Most of these are free as they have
been developed by software developers with a hobby in communications or
as educational projects and exercises.
I've been using the little orange tool that they use and sell at
Autozone (~$180). It's worked great for me, but I don't use mine for
real diagnostics. I just clear the codes and see if they come back- if
they do, then I know it's a real problem to have a knowledgable person
look at. (I use my scan tool as a false-alarm filter)
BTW - Does anyone know how bad it is to get the "catalyst efficiency out
of spec" code about every 15k miles?
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