Actron scan tool - how to obtain OBDII codes '95 T100

1995 T100. 3.4 w/auto trans. 319,000 miles.

Two days ago, I attempted to use an Actron scan tool to read OBDII
codes - nothing's wrong, I was just curious to see if everyting was
within range. It was a loaner tool from my local Advance Auto Parts. I
don't recall the model number. I plugged it in and followed the
on-screen instructions. I was given the choice of Ford, GM, or
something called "Global". I assume global means everything imported.
So, I selected global.
The upon actuating the scan function, the display acted like it was
trying to communicate with the truck, but after a few seconds it showed
some sort of a communications error. I tried everything again, same
result.
Now for the questions. Was I doing everthing right? Is there a trick to
using a generic scan tool to get Toyota codes? I'm certain the system
is OBDII. The check engine light is not on. Will any codes be set and
not turn on the light?
As I said, I'm just curious as to how things are running. When the
truck starts rolling up this many miles, I can't help but think that
things like the O2 sensors and such could start going south.

"Lhead" <chestand@hotmail.com> sez:
[color=blue]
> 1995 T100. 3.4 w/auto trans. 319,000 miles.
>
> Two days ago, I attempted to use an Actron scan tool to read OBDII
> codes <snip>[/color]

OBDII was not mandated in vehicles until '96 ... methinks you don't have it
in that '95 T100.

See: [url]http://www.obdii.com/connector.html[/url]

Good wrenchin' to ya,
VLJ
--

<v@l.j> wrote in message news:16qdnVfjUYE27lPeRVn-hw@comcast.com...[color=blue]
> "Lhead" <chestand@hotmail.com> sez:
>[color=green]
> > 1995 T100. 3.4 w/auto trans. 319,000 miles.
> >
> > Two days ago, I attempted to use an Actron scan tool to read OBDII
> > codes <snip>[/color]
>
> OBDII was not mandated in vehicles until '96 ... methinks you don't have[/color]
it[color=blue]
> in that '95 T100.
>
> See: [url]http://www.obdii.com/connector.html[/url][/color]

Looking further down the listings on that page, it has certifications listed
for '95 T100s so mebbe you do ... never mind. :-)

Good wrenchin' to ya,
VLJ
--

If the scan tool is a loaner, chances are that it isn't working as well
as it should and might be damaged. Try borrowing a different tool. If
this gets the same results, there might be a problem with the
diagnostic connector or wiring which is not allowing the scan tool to
communicate with the engine computer.