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putt@webtv.net - 25 Jul 2007 14:01 GMT

I'm wanting a program I can load to my laptop to read the data
stream/parameters on an OBD 1 system. Not a Ford but a mid-80s
Cadillac. No help from the GM groups about OBD 1 programs. Maybe
someone here knows? Thanks

Dave S(Texas)

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SnoMan - 25 Jul 2007 14:37 GMT

>I'm wanting a program I can load to my laptop to read the data
>stream/parameters on an OBD 1 system. Not a Ford but a mid-80s
>Cadillac. No help from the GM groups about OBD 1 programs. Maybe
>someone here knows? Thanks
>
>Dave S(Texas)

They may exsist for that old of vehcile but I personally know of none.
The ones I know about are OBD2.
-----------------
TheSnoMan.com

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Mike H - 25 Jul 2007 15:53 GMT

On Jul 25, 8:01 am, p...@webtv.net wrote:

> I'm wanting a program I can load to my laptop to read the data
> stream/parameters on an OBD 1 system. Not a Ford but a mid-80s
> Cadillac. No help from the GM groups about OBD 1 programs. Maybe
> someone here knows? Thanks
>
> Dave S(Texas)

There isn't anything. Prior to the OBDII system there were no
significant parameters required to be available to diagnosticians
other than the trouble codes. Each auto maker added some basic
functionality as they saw fit (i.e. the EEC-IV can do a cylinder
balance test).

This is what created the terribly expensive Scan Tool market, as each
player in the market had to work with each auto company to negotiate
for information on how to utilize functionality available within their
diagnostic connectors. The one I've seen most people looking for on
ebay lately is the Snap On MT2500 scan tool. The Ford program and key
for this tool will give you access to quite a bit of data through the
OBDI port. Not sure how useful such things are for GM.

I am unaware of any, i.e. zero, software products that will let you
plug your PC into a OBD1 car and do anything with it. Not only was
there no standardization from automakers on the data available, but
there was no standardization on the connectors, the electrical
properties, or the method to communicate. Thus most Scan Tools also
come with a bunch of different connectors so they can talk to the
various different car implementations.

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David M - 26 Jul 2007 00:46 GMT

On Wed, 25 Jul 2007 08:01:07 -0500, putt rearranged some electrons to
form:

> I'm wanting a program I can load to my laptop to read the data
> stream/parameters on an OBD 1 system. Not a Ford but a mid-80s
> Cadillac. No help from the GM groups about OBD 1 programs. Maybe
> someone here knows? Thanks
>
> Dave S(Texas)

OBD1 doesn't provide a data stream.

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David M (dmacchiarolo)
http://home.triad.rr.com/redsled
T/S 53
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Big Al - 26 Jul 2007 02:00 GMT

> On Wed, 25 Jul 2007 08:01:07 -0500, putt rearranged some electrons to
> form:
[quoted text clipped - 7 lines]
>
> OBD1 doesn't provide a data stream.

Sorry to hear that as my OTC OBD1 scanner reads them:) Shows any four
readings you select at the same time. Shows battery temp., voltage, injector
pulse width, road speed, spark advance, O2 sensor, engine RPM and so on. It
also emulates a Ford Star system reader, what ever that is:)

I suggest he does some net searching. I found this in a minute:

http://www.etoolcart.com/browseproducts/OBD-I-Scanner-OBD-1.html

Al

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David M - 26 Jul 2007 10:30 GMT

>> On Wed, 25 Jul 2007 08:01:07 -0500, putt rearranged some electrons to
>> form:
[quoted text clipped - 18 lines]
>
> Al

Are you sure you get a data stream from EEC-IV? I read several things
that said otherwise. GM, Jeep, & Chrysler provided one, but not Ford.

OBDI wasn't standardized like OBDII is.

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Mike H - 26 Jul 2007 21:44 GMT

...

> Are you sure you get a data stream from EEC-IV? I read several things
> that said otherwise. GM, Jeep, & Chrysler provided one, but not Ford.
>
> OBDI wasn't standardized like OBDII is.

The EEC-IV gained information it could send with the least available
prior to 1990, and the most available after 1990. You will notice
this with some of the aftermarket control systems that use the
diagnostic port on the EEC-IV to run different programs. On older EEC-
IV's, there is simply some information you can't change because it
didn't exist in any memory address.

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Big Al - 27 Jul 2007 05:12 GMT

> >> On Wed, 25 Jul 2007 08:01:07 -0500, putt rearranged some electrons to
> >> form:
[quoted text clipped - 23 lines]
>
> OBDI wasn't standardized like OBDII is.

He has a Cadillac! :)

Al

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David M - 27 Jul 2007 12:37 GMT

>> >> On Wed, 25 Jul 2007 08:01:07 -0500, putt rearranged some electrons to
>> >> form:
[quoted text clipped - 29 lines]
>
> Al

Yeah, I finally figured that out. :-)

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Big Al - 30 Jul 2007 00:46 GMT

> >> OBDI wasn't standardized like OBDII is.
> >
[quoted text clipped - 3 lines]
>
> Yeah, I finally figured that out. :-)

So far with the OTC code reader, Chrysler cars give the most information.
I've dummied up the O2 sensor on a Dodge truck and varied the voltage and
watched the injector pulse width change. Drove the truck and varied the ECM
full rich to full lean. Quite a change in the engine. Pinged really bad at
full lean.

Used a 1.5 volt AA cell and a pot to dummy the O2 signal and found out the
ECM supplies current to the O2 sensor. Didn't expect that. My guess it's to
drive the sensor full rich if it opens or someone unplugs it. Full rich is
not a good place as that drives the injector map to full lean. And, the ECM
does not set the CEL lamp, but it does store the Too Rich code. Does the
same thing for an out of range temperature sensor, no CEL, stores Too Cold.

Al

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David M - 26 Jul 2007 10:33 GMT

On Wed, 25 Jul 2007 08:01:07 -0500, putt rearranged some electrons to
form:

> I'm wanting a program I can load to my laptop to read the data
> stream/parameters on an OBD 1 system. Not a Ford but a mid-80s
> Cadillac. No help from the GM groups about OBD 1 programs. Maybe
> someone here knows? Thanks
>
> Dave S(Texas)

Try this:

http://www.aldlcable.com/

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putt@webtv.net - 26 Jul 2007 13:40 GMT

>program I can load to my laptop to read
> the data stream/parameters

Thanks for the help. The system on the car is high-end state of the art
for the time. It may have originally came from the Corvette racing part
of GM. I can read all the parameters, ECM/BCM codes, perform switch
tests and some other function tests, but all the info is displayed on
the dash info panels. Kind of a pita to jump in/out of the car, so I
was thinking there must be some software program to use a remote display
monitor. With the scanner already built into the system I figured I'd
need the connecting cable and program. Thanks again, I'll take it from
here. Ford people are just nicer/smarter than gm people, but I love
this car.

Dave S(Texas)

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