Elm327 or similar device

[Weatheralls Auto]

How many actually have one?

I am working on TRYING to build an App to find the Seed/Key pair and eventually Pull bin file and write bin file.

My current code (lots of work to do yet) hopefully will get key, but may take 4 to 8 days of running lol.

Going to hook up to a Pcm later this week to test (cross fingers)

I am also building a Sniffer with it to monitor data between Pcm & Tech2 if this current project flops.

I am excited, as if I get this to work, you can use it with available editors (Tiny Tuner, Table Editors) to edit you bin and reload to PCM without having to purchase products like HPT or DHP.

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[Weatheralls Auto]

To add, the reason that I ask is, if someone wants to try it I can Upload or even if you also have VB6 I will upload the source for you ( Though I am pretty much just a hack at programming it may be hard to follow what I have done)

[robertisaar]

if you get this rolling, i may have to learn a few things about VB6...

maybe the OBD1.5 PCMs could be tuneable then....

[Weatheralls Auto]

I am not up on the reasons OBD 1.5 was not tuneable, I suspect it was not a Key issue but an editing issue.

Creating a program to edit the file is way beyond me (at this time anyways) and will be relying on TinyTuners if I am successful.

Now TinyTuners does NOT have the ability to turn off codes, I hope it will be added, if not I may then have to learn VB.net as that is the language it is written in lol

[robertisaar]

I am not up on the reasons OBD 1.5 was not tuneable, I suspect it was not a Key issue but an editing issue.

so far, we don't know the command strings to pull the BINs through the ALDL port, or push them back through to wire the EEPROM.

sounds a lot like your situation.

except i'll have the fun of hacking through, disassembling and commenting all of it... i am anticipating it taking at least a year, start to finish for the entire BIN.

[Weatheralls Auto]

Next time I have an OBD1.5 Veh in my shop, I will be sure to hook up the sniffer to see if I can log the data to and from.

OBD 1.5, still had the replaceable proms correct?

[robertisaar]

OBD 1.5, still had the replaceable proms correct?

no, and that's why we don't know the commands to do it. if it did have removeable PROM, i could just stick it in my EEPROM burner and read it and hack through that way.

[Weatheralls Auto]

Well, that would mean that a Tech2 would be required to program, which then it should be possibly to sniff the commands the Tech2 sends receives.

I will have to read up and see which protocol it uses (not sure if it is J1850 Vpw or another? )

[robertisaar]

Well, that would mean that a Tech2 would be required to program, which then it should be possibly to sniff the commands the Tech2 sends receives.

I will have to read up and see which protocol it uses (not sure if it is J1850 Vpw or another? )

i'll admit, i don't know what J1850 Vpw means

[Schmieder]

When my brother gets back in town I'll ask him what could be done.

Linux would be much better suited to do such a thing, but that takes time to learn.

I fooled with linux for a while, but that was a year or so ago. I forgot a lot of basic information.

If you do happen to be familiar with linux, I suggest downloading backtrack 3 or 4. It happens to be the most powerful hackers OS on the free market. I used it to hack wireless keys while on the road. Only took 3-4 minutes to get a secure connection.

I guess sniffing through USB/Serial would work but that depends on the hardware design. I'm not too familiar with PCM set ups.

once I get familiar with the PCM lanuage, I'll be able to help much more.

Unitl then,

PS - NEVER leave Bluetooth activated on your phone. I have seen first hand everything in a phone accessed. Even the mouth piece was turned on like a spy device. Only works in extreme short range but darn it, it works well in bars.

EDIT: I think PCM's are written in Visual Basic. If you googled Visual Basic Serial Data send and receive code you may find what you are looking for. If I understand correctly what you are trying to do, injecting the proper code would send all the data you are seeking right to your pc/laptop.

I can't help out much more until I get to look over the code in the PCM. When I get a free minute I'll DL a GM vehicle bin file and decompile it for fun just to get a peak.

There should be a data send function already coded in there for the factory/dealerships to use. i imagine all you need to do is change the address to match.