GM ALDL protocols (description) - from GM guy

**EfimoMax** · 06-20-2007, 01:41 PM

Hi there!

I am new here.

Few days ago my car was stolen from building enterence (Chrysler 300M) (I live in appartments). And i decide to reanimate my old car (Chevrolet S10 Blazer) and put there a CarPuter with support ECM diagnostic and OnScreen gauges.

I was try to find out here how to connect my car to computer.... But unfortunatly did not find any helpfull information about communication protocol ALDL (OBD I) to write the software by myself. And many other people ask here about this stuff...

Here it is.... I found it....

In archive different protocols with GM ECU depending the car body, year, engine, ignition system...

ATTENTION, THIS IS NOT A PDF FILE !!!
THIS IS RAR ARCHIVE, YOU MUST CHANGE FILE EXTENSION
FROM .PDF to .RAR

P.s.

To admin: sorry for this, but you have limit 200k for upload RAR

To other: sorry for bad english (the english language is foreign language for me)

**EfimoMax** · 06-23-2007, 06:08 PM

Is this information helpfull for anyone?

**sinclairvital** · 06-25-2007, 05:11 AM

Yes. Thank you.
Which interface cable did you use?
Sinclair
http://www.kbmsystems.net
http://www.obdkey.com

**meisner** · 06-25-2007, 12:12 PM

Don't know if you'd be interested in this, but I have designed and built an ALDL interface adapter that works with a PC (standard serial interface). I have tested it with WinALDL, PCMCOMM, TurboLink, etc. and it works great. This unit was originally built for the 85-88 V6 Pontiac Fiero. I have also got it to work with the 3800SC engine that is a popular swap with the Fiero community.

Here's more info: http://www.meisners.net/aldl

Steve

**84RegalRider** · 06-25-2007, 03:48 PM

i did my software in java. i think it came out pretty nice. but yea there is a lot of good info still out on the net on ALDL. the cable cost me like 2 bucks to make and it alll worked fine on my 83 231 v6.

too bad some mofo totaled my regal infront of my house.....

**EfimoMax** · 06-25-2007, 04:10 PM

Originally Posted by meisner

Don't know if you'd be interested in this, but I have designed and built an ALDL interface adapter that works with a PC (standard serial interface). I have tested it with WinALDL, PCMCOMM, TurboLink, etc. and it works great. This unit was originally built for the 85-88 V6 Pontiac Fiero. I have also got it to work with the 3800SC engine that is a popular swap with the Fiero community.

Here's more info: http://www.meisners.net/aldl

Steve

Yaeh, it is very interesting, but far away from me and to expensive (sending to my place is not secure).

I found a couple of cable schemes and can't decide which i need to use:

1) scheme on 2 transistors
2) scheme with max 232, transistors (or ather variant without transistors)
3) or scheme from http://www.techedge.com.au/vehicle/aldl8192/8192hw.htm

Can you tell me which i need to use? (S10 Blazer, 94, V6, TBI, i think ALDL 8192)

**EfimoMax** · 06-25-2007, 04:13 PM

Originally Posted by 84RegalRider

i did my software in java. i think it came out pretty nice. but yea there is a lot of good info still out on the net on ALDL. the cable cost me like 2 bucks to make and it alll worked fine on my 83 231 v6.

too bad some mofo totaled my regal infront of my house.....

Which scheme you use?
Are you try your software on both ALDL 160 and ALDL 8192?

Max.

**EfimoMax** · 06-25-2007, 04:15 PM

Originally Posted by sinclairvital

Yes. Thank you.
Which interface cable did you use?
Sinclair
http://www.kbmsystems.net
http://www.obdkey.com

I dont have a interface cable yet. Right now i've got all parts for this/ but still not sure which i should made....

**84RegalRider** · 06-26-2007, 02:58 AM

OBD GM ALDL software

its only for 160 baud.

wont work on 8192.

development kinda stopped once my car got totaled.

if your pcm is 160
http://www.home.aone.net.au/~techedge/vehicle/2tran.gif
that is a great easy diagram to follow.