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obd scan tools

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klashniv Slammed & Awesome Dubber

82 posts · joined Mar 2006 ·

#507847
does anyone know of a scan tool and software that can diagnose both OBD-I and OBD-II faults?

how do they work, do you plug it into the socket in the engine compartment and into your computer, run the program and click 'read code' and it tells you the problem or the code number?

am assuming that most ECUs follow the same protocols so one tool should work on all?

an advice from someone in the know will be greatly appreciated.

cheers

seagull Compulsive Aussie Vee Dubber

4,979 posts · joined Dec 2003 ·

#508039
There is a kit on the RS liberty fourm that may help you ( if ) you have a subaru
Its a good read but I dont think I would buy one just yet .

Most just have the fault code that flashes
Looking for that special lady : PM me for coffee & cake

ratbug aka toddy101

439 posts · joined Jan 2003 ·

#508220
Yeah i've seen those kits as well, but pretty pointless when you can get the onboard ecu light to do the same thing for nothing.

I had a diagnostic tool hooked up to mine a while back, came with adaptors to fit the connectors for different cars, gave me info like timing, injector duty cycle, water temp, vehicle speed, engine speed, sensor input volts etc.. Not sure if it was OBDI or OBDII. The tool cost $10,000 or something silly like that.
Sharbuilt Beach buggy with Subaru 2L Turbo
Thunderanch Riot with Subaru 2L Turbo
Manxter with FA20turbo
Click here for wiring looms

seagull Compulsive Aussie Vee Dubber

4,979 posts · joined Dec 2003 ·

#508361
wow that is a lot of $ Andew

hows the subaru going Mate ?

neil
Looking for that special lady : PM me for coffee & cake

GeorgeL Officially Full-On Dubber

231 posts · joined Feb 2006 ·

#508384
ratbug wrote:Yeah i've seen those kits as well, but pretty pointless when you can get the onboard ecu light to do the same thing for nothing.

I had a diagnostic tool hooked up to mine a while back, came with adaptors to fit the connectors for different cars, gave me info like timing, injector duty cycle, water temp, vehicle speed, engine speed, sensor input volts etc.. Not sure if it was OBDI or OBDII. The tool cost $10,000 or something silly like that.
Pretty much can be done with a laptop computer interface:

http://www.troublecodes.net/articles/AT/AutoTap_OBDII_for_Windows.shtml

Cost: about US$200 for the interface and software. I've seen other software that is cheaper, but not as capable.

I'd probably get in a wreck with all those pretty displays to watch! 🙂

klashniv Slammed & Awesome Dubber

82 posts · joined Mar 2006 ·

#508471
i happen to own a JDM 1997 Toyota Corolla (AE110). It works beautifully but being the tinkerer, was hoping to get well versed with OBD by peaking at it working. Am hoping it will give me a better understanding when I venture into subaru ECU land.

found some valuable info here: http://www.scantool.net

GeorgeL Officially Full-On Dubber

231 posts · joined Feb 2006 ·

#508653
klashniv wrote:i happen to own a JDM 1997 Toyota Corolla (AE110). It works beautifully but being the tinkerer, was hoping to get well versed with OBD by peaking at it working. Am hoping it will give me a better understanding when I venture into subaru ECU land.
About the only thing to know about adapting the Subaru ECU is how to make the ECU think that it is still mounted in a Subaru, not blazing down the road backwards in some odd German vehicle.

About all the OBD tool does is supply information about what the sensors are reporting to the ECU, which allows you to find and replace bad sensors. You really can't _do_ anything to the CPU programming other than reset trouble codes.

It would be nice if we could tweak the ECU programming to ignore certain inputs, but the smog czars have made sure that that stuff is locked up tight. The only way around that is to either supply the correct sensors or to attach some gizmo that makes the ECU think that it is seeing the required sensor.

Of course, that is what keeps the aftermarket ECU suppliers in business! 🙂

George

ratbug aka toddy101

439 posts · joined Jan 2003 ·

#508887
seagull wrote:wow that is a lot of $ Andew

hows the subaru going Mate ?

neil
Hi Neil, i didnt buy one, just borrowed it from the mechanics. Did it soon after doing the conversion to make sure everything was above board.
Subaru is in hibernation, bit cold to drive... spending my time planning my next subaru project. Might have as many project as you one day 🙂
Sharbuilt Beach buggy with Subaru 2L Turbo
Thunderanch Riot with Subaru 2L Turbo
Manxter with FA20turbo
Click here for wiring looms

seagull Compulsive Aussie Vee Dubber

4,979 posts · joined Dec 2003 ·

#508916
Yes Andrew I hope you do

WRX bug
RS liberty wagon with 75 mm lift kit made it all my self Jap JDM RS legacy motor & 4444 auto with Suretrack LSD rear , soon to have TT auto

I am going shopping in the morning so I have some more 🙂
Looking for that special lady : PM me for coffee & cake