At this point there's no-body doing this
??...I'm currently working on a programming
method, but it'll be a while
before I've got this one figured out. This is one of the first
truck "flash" computers.
Lyndon.
Hi all
Could anyone give some helpto change the
calibration for
a GM Truck SS10 95, with Delco black box
16166340
86BABBK 43212W P5
service
16193495.
Thanks in advance
>Hi, > My best guess
is: maybe, but you would have to try it. I am not
too >confident.
I would need to know what year the
S-10 is from.
You need to know that GM did not
standardize their communication protocol. They made changes to the
commands and responses nearly every model year. We found that the
93 LT-1 responses are quite different from the 94/95
LT-1 responses. And of course the 96's are OBD-II. So this
would imply that the S-10 might have a different communication
protocol.
You also need to know that if you go
down the 'remove the flash' route, that GM has swapped some of the lines
between the flash and the CPU. If I remember correctly, they
swapped 3 of the address lines. So by simply reading the data in
the flash, you will see garbage. It can be decoded, but again, that
is more work.
From what I've seen from the
software inside a number of GM PCM's, they tend to re-use their code
whenever possible. Sometimes they reuse the actual source code, and
sometimes they just reuse the ideas and the code looks similar but
different. Unfortunately the location in the flash where
some specific code (like for the speed limit) moves around alot from PCM
to PCM.
Also unfortunately, the speed limit change you
need is probably just 1 or 2 bytes that need
changing.
We really only understand the 94/95 LT-1 PCM's
in detail. There are people out there that understand the earlier
models pretty well, and some that understand the later models pretty
well. I'd suggest you look into the GMECM mailing list (found at
diy-efy.org) or the DIY-EFI mailing list (same address). There are
ALOT of experts there that might be able to answer your questions, and
maybe even provide some tools to help. I have to believe
that someone on this list has the code for the S-10 truck, and might be
able to point you at the location in memory that needs to be
changed.
You can try our software and see if it works,
but you would have to purchase a cable.
Thanks for
finding that error on the web page. We will go fix it.
Dave @
carputing.com
"Dr.Acacio" <aortiz@w3ti.com.br>
wrote:
> --------------------------------------------- >
Attachment: > MIME Type: multipart/alternative >
--------------------------------------------- Could be possible to use
your program ( PCMReader.exe)to read a Brazilian S-10 truck which has no
VIN number???? Since you know the protocol to talk with the GM flash ECU
there are any chances to develop an editor for Brazilans trucks?? I know
you are involved in the OBD II version of the editor, and probably has no
time do do others projects, but we need here any tool to remove the speed
limit... Thanks in advanced.... PS 1.Another way to read would be
removing the flash and read it in a programmer... Do you think that
the speed limit routine will be completely different from each GM flash
ECU type???? 2. There are an error in your web page, the total
tamount to buy cable and software will be from 195 to
US$295.00 not
245.00..... Regards.
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