computer to get all engine diagnostics?
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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=69635
Printed Date: May 01, 2024 at 5:43 AM
Topic: computer to get all engine diagnostics?
Posted By: total_overkill
Subject: computer to get all engine diagnostics?
Date Posted: December 31, 2005 at 2:27 AM
I have a degree in computer programming. Can you use computer code and the hookup in the car and get all engine diagnostics. Is there one already out there Hooks into onboard laptop? The programming languages I know are C, C++, Visual Basic, And I am quite sure Access wont help me unless I want to know my gas\mileage ratio. LOL ------------- 40 grit has saved my life sometimes =[
Replies:
Posted By: geepherder
Date Posted: December 31, 2005 at 6:58 AM
You have to use a program designed to interface with the on board computer. Then you can hook up your lap top. As far as I know, they do not use common pc programming languagaes.
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My ex once told me I have a perfect face for radio.
Posted By: KPierson
Date Posted: December 31, 2005 at 10:29 AM
If the car is newer then a 1995 it should be OBDII compliant. OBDII is a universal OnBoard Diagnostic protocol that is universal. They make OBDII chips to communicate to the cars computer, you may be able to write something to move that data on to a laptop. ------------- Kevin Pierson
Posted By: techguy688
Date Posted: December 31, 2005 at 4:59 PM
They make OBD II readers that interface with software in a Microsoft Window opearting system https://obddiagnostics.com/. Is this what you were looking for . It connects to the OBD connector in the vehicle and into a serial port on a laptop. ------------- Just because you've done something for a long time doesn't mean you're any good at it.
Cable Ties Rock!
Posted By: leoslocks
Date Posted: January 09, 2006 at 9:58 PM
Here are some links about the up coming J2534 Pass through system. This should cover the protocols of communication all the newer cars will utilize.
https://www.passthruxs.com/all_about_j2534.htm
https://sourceforge.net/projects/j1699-3/
https://www.dearborn.co.uk/training.htm
Posted By: gus1
Date Posted: January 10, 2006 at 11:56 AM
I know there is a dandy one out there for VW's.... Vag-Com. Runs off a computer, same functionality as the stealership's scan tools, and I believe worth less than $400 for the full CAN interface (will work on all VW/Audi/etc. from 1995 to present)
It also has some limited generic OBD2 functions built into it, this will probably expand as more manufacturers adopt the CAN data system (apparently beginning 2007 MY... supposed to be an ISO standard)
Gus
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Wherever I go, that is where I end up......
Posted By: firstrax
Date Posted: January 19, 2006 at 9:34 AM
total_overkill wrote:
I have a degree in computer programming. Can you use computer code and the hookup in the car and get all engine diagnostics. Is there one already out there Hooks into onboard laptop? The programming languages I know are C, C++, Visual Basic, And I am quite sure Access wont help me unless I want to know my gas\mileage ratio. LOL
If you give the model and year of the car I can give you a simple circuit to interface a serial port to the OBD connector.
Posted By: total_overkill
Date Posted: January 19, 2006 at 9:58 AM
1997 grand am SE thanks ------------- 40 grit has saved my life sometimes =[
Posted By: firstrax
Date Posted: January 19, 2006 at 9:32 PM
total_overkill wrote:
1997 grand am SE thanks
Then you have a VPW (variable pulse width) system. Its a one wire system. A logic 1 is a passive line for a period of 128us or an active line for a period 64us. A logic 0 is the exact opposite. No start bits or stop bits, just data bits with no interbyte spacing. Typical data request would be: 68 6A F1 01 05 (Requests coolant temperature). SAE documents J1979 (codes) and J1850 (protocol) will have everything you need.
Posted By: fuseblower
Date Posted: January 20, 2006 at 4:31 PM
This computer system connects to your OBII as an option. You can probably do some additional programming and get the system to do what ever you want it to. https://www.drivesoft.net/
Posted By: total_overkill
Date Posted: January 20, 2006 at 5:01 PM
Fuseblower LOL now thats a kewl name.
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40 grit has saved my life sometimes =[
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