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#56461 - 25/04/2002 00:43 Re: OBD-II Car Diagnostic [Re: Daria]
cyberco
member

Registered: 29/01/2002
Posts: 109
Loc: United Kingdom
The manufacturer doesn't state compliance or not but several groups and websites claim that 1995 onwards models are compatable.

Mine is a 1999 model so it should be ok, mitsubishi do make references to the OBD-II diagnostics but maybe there is a slight difference with timing or somthing!

Will have to keep the faith and do some more homework!!!
_________________________
----------------------- www.cyberco.net www.3000gt.co.uk

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#56462 - 25/04/2002 04:09 Re: OBD-II Car Diagnostic [Re: cyberco]
SE_Sport_Driver
carpal tunnel

Registered: 05/01/2001
Posts: 4903
Loc: Detroit, MI USA
Is there anyone here that works for Dodge? (The Dodge Stealth is the sister car to the 3000GT).... I have sources at Ford and GM, but not Dodge...
_________________________
Brad B.

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#56463 - 25/04/2002 13:30 Re: OBD-II Car Diagnostic [Re: cyberco]
eternalsun
Pooh-Bah

Registered: 09/09/1999
Posts: 1721
Loc: San Jose, CA
If your car is 1996 and onward it has to be 100% compliant. What this means varies slightly from manufacturer to manufacturer. But for the most part, you can plug in any OBD2 hardware box into the port and it would be fine. What I find non-compliant and buggy is often the free OBD2 implementations on the web. Shoot, even the ones that you PAY for suck ass.

Calvin

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#56464 - 25/04/2002 17:13 Re: OBD-II Car Diagnostic [Re: eternalsun]
cyberco
member

Registered: 29/01/2002
Posts: 109
Loc: United Kingdom
It's 1999 model, but still having problems with the software at the moment, nevermind, as the saying goes .... if at first you don't succeed ..... try try again ;-)

_________________________
----------------------- www.cyberco.net www.3000gt.co.uk

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#56465 - 26/04/2002 00:21 Re: OBD-II Car Diagnostic [Re: cyberco]
justinlarsen
old hand

Registered: 31/12/2001
Posts: 1109
Loc: Petaluma, CA
thats the spirt, and if ur car isnt 100% compatable, you should make it 100% compatable.
_________________________
---- Justin Larsen

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#56466 - 30/04/2002 20:28 Re: OBD-II Car Diagnostic [Re: eternalsun]
Ezekiel
pooh-bah

Registered: 25/08/2000
Posts: 2413
Loc: NH USA
I'm not directly involved with scan tools but I do attend yearly trade group meeting with the Detroit automakers for preview service info on next year's models. The scan tool guys usually have a stack of paper 5" thick for each manufacturer documenting this and that trouble code, flag, etcetera. It's an immense amount of specification that changes yearly. I'll ask around this June to see if I can find anyone interested in lending a hand to you guys.

-Zeke
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WWFSMD?

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#56467 - 01/05/2002 03:11 Re: OBD-II Car Diagnostic [Re: cyberco]
Dava
member

Registered: 06/12/2000
Posts: 192
Loc: Bucks UK
I have been stealth following your project and maybe starting with something slightly easier than the full OBD route would help to get things rolling. I have expressed this as a wishlist item before but I have no programming skills to be able to do it myself.


Most modern cars will have a electronic speedo sense that goes into the ECU which will give 4 or 8 pulses per wheel revolution. Link this into the empeg serial port (shouldn't take much) and you can then measure distance using the empeg by simply counting pulses.

The empeg has a RTC so you then have the ability to measure acceleration (0-60 times), speed (current,avg,top), deceleration, write journey logs etc,etc.

The hardware/compatibility part of this should present a much smaller hurdle than OBD and the resultant functionality could be quite useful to a much wider audience.

Whay think ye?
_________________________
MK2 smoked 32Gb S/n 090000949 MK2a Blue 20GB racked and out of sync

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#56468 - 01/05/2002 09:54 Re: OBD-II Car Diagnostic [Re: Dava]
cyberco
member

Registered: 29/01/2002
Posts: 109
Loc: United Kingdom
OBD route will be much better once the basics are in place because it's just a matter of processing collected data!

I've got the RS-232 to ISO interface adaptor, so it's not even a hard ware issue involved, it's just software!

I'd need completely new hardware to interface direct to components like the speedo, and this hardware would be different for each car, the OBD standard should be more generic!

The latest trials were last night, but it looks like it's a problem understanding the car system more than anything else at this stage!



Thanks for your comments though!

_________________________
----------------------- www.cyberco.net www.3000gt.co.uk

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#56469 - 03/05/2002 09:20 Re: OBD-II Car Diagnostic [Re: cyberco]
Dava
member

Registered: 06/12/2000
Posts: 192
Loc: Bucks UK
This was my whole point, you seem to be having problem which you say are related to software but instead seem to be car/interface dependant.

If you connect the 12V pulses from the ECU to the DTR line on the empeg's serial port, the hardware is finished. Then you just count pulses on DTR. I agree that OBD would be more flexible but I disagree that it could possibly be any easier.

The only car specific part would be finding the correct lead into the ECU. PIN A1 (Green/Yellow) on a WRX by the way.
_________________________
MK2 smoked 32Gb S/n 090000949 MK2a Blue 20GB racked and out of sync

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#56470 - 03/05/2002 09:56 Re: OBD-II Car Diagnostic [Re: Dava]
SE_Sport_Driver
carpal tunnel

Registered: 05/01/2001
Posts: 4903
Loc: Detroit, MI USA
For my WRX, I'm looking at the Delta Dash product....
_________________________
Brad B.

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#56471 - 04/05/2002 14:37 Re: OBD-II Car Diagnostic [Re: Dava]
altman
carpal tunnel

Registered: 19/05/1999
Posts: 3457
Loc: Palo Alto, CA
I hope you mean CTS or DCD (I think those are the 2 connected signals)... DTR is an OUTPUT from the empeg!

Hugo

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#56472 - 09/05/2002 08:28 Re: OBD-II Car Diagnostic [Re: altman]
Dava
member

Registered: 06/12/2000
Posts: 192
Loc: Bucks UK
Hmmm.. Thanks

ISTR that the in car DB9 is not fully wired in the sled, do we have DCD or CTS?
_________________________
MK2 smoked 32Gb S/n 090000949 MK2a Blue 20GB racked and out of sync

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#56473 - 09/05/2002 08:42 Re: OBD-II Car Diagnostic [Re: Dava]
altman
carpal tunnel

Registered: 19/05/1999
Posts: 3457
Loc: Palo Alto, CA
It's fairly wired, but the wires are shared; ISTR it's DCD and CTS, but DCD is used for mobile phone mute on the harness and CTS is used for lights-on detect.

...so you only get a line if you're not already using it for something else.

Hugo

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#56474 - 09/05/2002 08:56 Re: OBD-II Car Diagnostic [Re: altman]
Dava
member

Registered: 06/12/2000
Posts: 192
Loc: Bucks UK
Ahh, So If I use both the mobile mute and the lights sense (and I do) then I am stuffed as far as another input is concerned?
_________________________
MK2 smoked 32Gb S/n 090000949 MK2a Blue 20GB racked and out of sync

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#56475 - 09/05/2002 16:22 Re: OBD-II Car Diagnostic [Re: Dava]
altman
carpal tunnel

Registered: 19/05/1999
Posts: 3457
Loc: Palo Alto, CA
Sorry, but you are... the inputs are shared mostly because of a lack of pins on the docking connector - we couldn't find anything half-decent with more than 24 ways...

Hugo

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#56476 - 10/05/2002 02:26 Re: OBD-II Car Diagnostic [Re: altman]
Dava
member

Registered: 06/12/2000
Posts: 192
Loc: Bucks UK
Fair enough. Thanks for the info. I think that my next step is to get some kind of counter IC which can output its total via RS232.
_________________________
MK2 smoked 32Gb S/n 090000949 MK2a Blue 20GB racked and out of sync

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#56477 - 13/05/2002 08:19 Re: OBD-II Car Diagnostic [Re: altman]
TommyE
enthusiast

Registered: 08/06/1999
Posts: 356
Loc: NORWAY
So does this mean that I can wire up a phone mute on the serialport on the MKI as well??

TommyE

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#56478 - 13/05/2002 09:27 OBD-II Car Diagnostic - Update [Re: SE_Sport_Driver]
cyberco
member

Registered: 29/01/2002
Posts: 109
Loc: United Kingdom
Things might be moving again, I've been speaking to a few guys who know about this stuff and we are well on the way to a standard API!

Version 1 will be windows active-x component, with front end software!

Before you shout that it isn't compatable with empeg - that comes in version two when the software is proven reliable, stable, and above all else actually usefull!

As usual, don't expect quick results, could be a few months before you see empeg code postings here ..... but they are on the way!
_________________________
----------------------- www.cyberco.net www.3000gt.co.uk

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#56479 - 13/05/2002 09:41 Re: OBD-II Car Diagnostic - Update [Re: cyberco]
SE_Sport_Driver
carpal tunnel

Registered: 05/01/2001
Posts: 4903
Loc: Detroit, MI USA
Cool! Way to go!
_________________________
Brad B.

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#56480 - 13/05/2002 10:16 Re: OBD-II Car Diagnostic - Update [Re: cyberco]
smu
old hand

Registered: 30/07/2000
Posts: 879
Loc: Germany (Ruhrgebiet)
Hi.

Mind you, but backporting any source from an ActiveX component to a portable library is a pain-in-the-ass thing to do. A more useful approach would be to have three classes:
  • a class providing serial port access
  • a class providing the actual OBD-II interface
  • a wrapper class around these that provides the ActiveX component
That way, you will not have to actually transform an ActiveX component into something portable, but rather wrap something portable into an ActiveX component. If you want to port it, simply dump the wrapper class, port the serial port class and write a new wrapper for the new target architecture.

If you want to go a pretty portable way (though not for the empeg), you might want to use the Qt library (www.trolltech.com).
If you would like someone to check your code for portability to Unix/Linux, I can lend a hand. But don't expect me to invest much time before end of July. I have to finish my diploma thesis by July, 21st and also am still working on two empeg projects: extended upgrade image (boot from /dev/hda2) for the empeg and porting the GD library. The latter turned out to be far more complex than I thought.

cu,
sven
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proud owner of MkII 40GB & MkIIa 60GB both lit by God and HiJacked by Lord

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#56481 - 01/06/2002 21:07 Re: OBD-II Car Diagnostic - Update [Re: cyberco]
TheAmigo
enthusiast

Registered: 14/09/2000
Posts: 363
A standard API would be a nice idea. Someone else (I don't have the time right now though) could start work on displays, alarms, historical graphs, statistics and 2-D plots.

Some sort of core code that just logs all data to disk and has a plugin architechture for events would be a sweet design. Then other people can write visual and audio output formats.... then just a few scripts or config files and you could customize what you want your empeg to do for any given OBD event.

I haven't done much programming for the empeg, but I'm envisioning writing a config like this:

event oil.low {
player:pause();
display:show(lowoil.raw);
player:playfile(lowoil.mp3);
player:resume();
}

event user.menu1 {
# Triggered by hiject menu item
# Call the grapher plugin to show a graph for 5s.
graph:show(rpm, 5);
}

Am I dreaming or is something like that within the realm of possibility?
_________________________
--The Amigo

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#56482 - 21/09/2002 08:57 Re: OBD-II Car Diagnostic [Re: SE_Sport_Driver]
andym
carpal tunnel

Registered: 17/01/2002
Posts: 3995
Loc: Manchester UK
Attention OBD-II car people, the November edition of Elektor electronics magazine has an OBD-II to serial convertor. But it appears to do much more than just level shift. Apparently you can run through a terminal emulator and it interprets all the data and provides it as simple ASCII stuff. Shouldn't be too difficult to run on the empeg then. This is, until someone finds a good way of stopping the player hogging the serial port. That's really hindering a lot of data logging projects IMHO (GPS addons anyone?)
_________________________
Cheers,

Andy M

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#56483 - 21/09/2002 15:40 Re: OBD-II Car Diagnostic [Re: andym]
mtempsch
pooh-bah

Registered: 02/06/2000
Posts: 1996
Loc: Gothenburg, Sweden
Hmmm, doesn't the "-s-" flag to the player app stop it from grabbing the serial port? Requires a modified init though.

/Michael

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/Michael

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#56484 - 28/09/2002 12:33 Re: OBD-II Car Diagnostic [Re: mtempsch]
loren
carpal tunnel

Registered: 23/08/2000
Posts: 3826
Loc: SLC, UT, USA
Automakers to give diagnostic codes to repair shops

http://www.cnn.com/2002/TECH/ptech/09/27/diagnosing.car.repairs.ap/index.html
"WASHINGTON (AP) -- Automakers agreed Thursday to give independent repair shops their closely guarded codes used to diagnose troubles with today's high-tech vehicles so the shops can make the same repairs as franchise dealerships. "

"Under the agreement signed by the Automotive Service Association, the Alliance of Automobile Manufacturers and the Association of International Automobile Manufacturers, the automakers agree to make the service information available on the Internet by Aug. 31 at a "reasonable price." It will be available to all professional mechanics as well as amateurs working out of their garage at home, said Charlie Territo, spokesman for the Alliance of Automobile Manufacturers."
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|| loren ||

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#56485 - 29/09/2002 07:29 Re: OBD-II Car Diagnostic [Re: loren]
Ezekiel
pooh-bah

Registered: 25/08/2000
Posts: 2413
Loc: NH USA
A few source documents further that article courtesy of a trade group my company belongs to.

-Zeke


Attachments
116885-OBD Dorgan Letter (FINAL).pdf (364 downloads)

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WWFSMD?

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#56486 - 29/09/2002 07:32 Re: OBD-II Car Diagnostic [Re: Ezekiel]
Ezekiel
pooh-bah

Registered: 25/08/2000
Posts: 2413
Loc: NH USA
The second of them.

-Zeke


Attachments
116887-finaljointrelease.doc (370 downloads)

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WWFSMD?

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#56487 - 11/02/2003 09:17 Re: OBD-II Car Diagnostic [Re: SE_Sport_Driver]
rtundo
addict

Registered: 27/02/2001
Posts: 569
Loc: Albany, NY
Ran across this site, didn't know if it would be of interest to anyone.

http://pages.infinit.net/jsenk/obd_Perl.htm

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#56488 - 04/04/2004 06:27 Re: OBD-II Car Diagnostic [Re: rtundo]
bjoern
member

Registered: 03/04/2002
Posts: 169
Loc: Regensburg, Germany
Anything new on this thread? I got an obd2-RS232 converter and would just need the software for the empeg...

I wouldn't even want to log anything, just visualize some data whenever I want/need to.

Also, check out this newer thread:
http://empeg.comms.net/php/showflat.php?Cat=&Board=hackers_prog&Number=163729&page=&view=&sb=&o=&fpart=all&vc=1
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