OBD-II compliant car diagnostic tool
My adventure with OBD II and Linux began at http://www.vanheusden.com/O2OO/ The chip that makes the tool work so well is the ELM327 from Elm Electronics @ www.elmelectronics.com. Elm has several ELM32x chips for differing OBD and CAN uses. Most output to RS-232 so they are typically packaged with an FTDI serial-to-USB converter but some are packaged with a Bluetooth chip. The Australian outfit I ordered from was dx.com as recommended by Mr. Vanheusden. Depending on which Linux distro used you may have to compile some of the dependencies yourself even though the tool itself is written in Python. -Daryl
Attached are the graphs of the test I ran on my 1999 Saturn SL1. It has a 5-speed manual transmission so there is a lot of variation in the throttle setting. -Daryl
Hi Daryl, Did you do a presentation on this or was it just brought up during the roundtable? If so, do you have slides posted somewhere? I would love to get more details on how you set this up. thanks shawn On Mar 13, 2013, at 5:35 AM, Daryl F <wyatt@prairieturtle.ca> wrote:
Attached are the graphs of the test I ran on my 1999 Saturn SL1. It has a 5-speed manual transmission so there is a lot of variation in the throttle setting.
-Daryl<sensor_engine_coolant_temperature.png><sensor_engine_rpm.png><sensor_intake_manifold_abs_pressure.png><sensor_oxygen_sensor_bank1_sensor1.png><sensor_short_term_fuel_bank1.png><sensor_timing_advance.png><sensor_battery_voltage.png><sensor_engine_load.png><sensor_intake_air_temperature.png><sensor_long_term_fuel_bank1.png><sensor_oxygen_sensor_bank1_sensor2.png><sensor_throttle.png><sensor_vehicle_speed.png>_______________________________________________ Roundtable mailing list Roundtable@muug.mb.ca http://www.muug.mb.ca/mailman/listinfo/roundtable
I'd be totally into this as well. I'm sick of taking my car into the shop for a "computer diagnostic" and paying $150 for basically plugging in a serial cable. And 1/2 the time they still don't know what's causing that "check engine" light to come on. John On Wed, Mar 13, 2013 at 11:38 AM, Shawn Wallbridge <shawn@wallbridge.net>wrote:
Hi Daryl,
Did you do a presentation on this or was it just brought up during the roundtable? If so, do you have slides posted somewhere?
I would love to get more details on how you set this up.
thanks shawn
On Mar 13, 2013, at 5:35 AM, Daryl F <wyatt@prairieturtle.ca> wrote:
Attached are the graphs of the test I ran on my 1999 Saturn SL1. It has
a 5-speed manual transmission so there is a lot of variation in the throttle setting.
-Daryl<sensor_engine_coolant_temperature.png><sensor_engine_rpm.png><sensor_intake_manifold_abs_pressure.png><sensor_oxygen_sensor_bank1_sensor1.png><sensor_short_term_fuel_bank1.png><sensor_timing_advance.png><sensor_battery_voltage.png><sensor_engine_load.png><sensor_intake_air_temperature.png><sensor_long_term_fuel_bank1.png><sensor_oxygen_sensor_bank1_sensor2.png><sensor_throttle.png><sensor_vehicle_speed.png>_______________________________________________
Roundtable mailing list Roundtable@muug.mb.ca http://www.muug.mb.ca/mailman/listinfo/roundtable
_______________________________________________ Roundtable mailing list Roundtable@muug.mb.ca http://www.muug.mb.ca/mailman/listinfo/roundtable
-- John Lange www.johnlange.ca
Although this just came up in the roundtable discussion, it might make a good presentation topic for a future meeting... Daryl, would you be willing to present this as a topic some day? :) Gilbert On 2013-03-13 12:59, John Lange wrote:
I'd be totally into this as well. I'm sick of taking my car into the shop for a "computer diagnostic" and paying $150 for basically plugging in a serial cable. And 1/2 the time they still don't know what's causing that "check engine" light to come on.
John
On Wed, Mar 13, 2013 at 11:38 AM, Shawn Wallbridge <shawn@wallbridge.net <mailto:shawn@wallbridge.net>> wrote:
Hi Daryl,
Did you do a presentation on this or was it just brought up during the roundtable? If so, do you have slides posted somewhere?
I would love to get more details on how you set this up.
thanks shawn
On Mar 13, 2013, at 5:35 AM, Daryl F <wyatt@prairieturtle.ca <mailto:wyatt@prairieturtle.ca>> wrote:
> > Attached are the graphs of the test I ran on my 1999 Saturn SL1. It has a 5-speed manual transmission so there is a lot of variation in the throttle setting. > > -Daryl<sensor_engine_coolant_temperature.png><sensor_engine_rpm.png><sensor_intake_manifold_abs_pressure.png><sensor_oxygen_sensor_bank1_sensor1.png><sensor_short_term_fuel_bank1.png><sensor_timing_advance.png><sensor_battery_voltage.png><sensor_engine_load.png><sensor_intake_air_temperature.png><sensor_long_term_fuel_bank1.png><sensor_oxygen_sensor_bank1_sensor2.png><sensor_throttle.png><sensor_vehicle_speed.png>
-- Gilbert E. Detillieux E-mail: <gedetil@muug.mb.ca> Manitoba UNIX User Group Web: http://www.muug.mb.ca/ PO Box 130 St-Boniface Phone: (204)474-8161 Winnipeg MB CANADA R2H 3B4 Fax: (204)474-7609
I'll try putting a rough presentation together and see if is even possible to make something coherent but short enough: it's a pretty broad subject. I don't think the UofW would appreciate me bringing a car into the meeting room. hehe. But the software does a have an emulation mode so you can test it without an actual car so it may be possible to a demo of sorts. There's also the issue that I use a Linux distro that is pretty barebones so I'm not sure how easy it will be to get this working on something more mainstream like RedHat/CentOS. There's a lot of dependencies and I don't know if they are all available as binaries. I compiled everything from source code. Sorry Shawn, no slides (yet). John: I'm still very cautious about the wide usefulness of this software and diagnostic box. Without a lot of research it's hard to know in advance how effective this will be with a given car. I still haven't forced a "check engine" condition to be sure that it will diagnosis correctly _and_ allow to reset the check condition is it is supposed too. For the impatient, or those with time available, snoop around the link I sent previously http://www.vanheusden.com/O2OO/ as it leads to a lot of good information. Wikipedia also has a lot of info on OBD: https://en.wikipedia.org/wiki/OBD-II_PIDs https://en.wikipedia.org/wiki/On-board_diagnostics -Daryl On Wed, 13 Mar 2013, Gilbert E. Detillieux wrote:
Although this just came up in the roundtable discussion, it might make a good presentation topic for a future meeting...
Daryl, would you be willing to present this as a topic some day? :)
Gilbert
On 2013-03-13 12:59, John Lange wrote:
I'd be totally into this as well. I'm sick of taking my car into the shop for a "computer diagnostic" and paying $150 for basically plugging in a serial cable. And 1/2 the time they still don't know what's causing that "check engine" light to come on.
John
On Wed, Mar 13, 2013 at 11:38 AM, Shawn Wallbridge <shawn@wallbridge.net <mailto:shawn@wallbridge.net>> wrote:
Hi Daryl,
Did you do a presentation on this or was it just brought up during the roundtable? If so, do you have slides posted somewhere?
I would love to get more details on how you set this up.
thanks shawn
On Mar 13, 2013, at 5:35 AM, Daryl F <wyatt@prairieturtle.ca <mailto:wyatt@prairieturtle.ca>> wrote:
> > Attached are the graphs of the test I ran on my 1999 Saturn SL1. It has a 5-speed manual transmission so there is a lot of variation in the throttle setting. > > -Daryl<sensor_engine_coolant_temperature.png><sensor_engine_rpm.png><sensor_intake_manifold_abs_pressure.png><sensor_oxygen_sensor_bank1_sensor1.png><sensor_short_term_fuel_bank1.png><sensor_timing_advance.png><sensor_battery_voltage.png><sensor_engine_load.png><sensor_intake_air_temperature.png><sensor_long_term_fuel_bank1.png><sensor_oxygen_sensor_bank1_sensor2.png><sensor_throttle.png><sensor_vehicle_speed.png>
-Daryl
I just happened to be browsing the online databases at the Winnipeg Public Library. There is the Auto Repair Reference Centre database which had a complete list of the OBD-II codes for our car. You just need a library card to access it from home.
participants (5)
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Bill Reid -
Daryl F -
Gilbert E. Detillieux -
John Lange -
Shawn Wallbridge