[AT] O/T Tow truck OBD II question

[charlie hill]

Thanks Doug,  I'm using the Elm5 interface supplied by ProScan who I guess 
writes the software.  I just got the thing yesterday and have only spent 
about a half an hour with it.  Yes it is bi-directional and it also takes a 
screen shot at the moment a code is set.  The problem I'm having with this 
particular car is that it sets this code very rarely.  It seems to be some 
sort of momentary problem.  Everything else on the car checks out fine. 
It's set this code 4 or 5 times in the last two years but, as you would 
expect,  it usually sets it right before the car needs to be inspected.

Thanks for the input.  My immediate goal is to keep this code cleared long 
enough to inspect the car.  Then I'll try to figure out what's going on the 
next time it sets it.  Other than that this thing is a facinating toy.  It 
even has a dynomometer imulator and a quartermile performance setting.  The 
1/4 mile thing lets you stage the program.  Then when the wheels move on the 
car it starts gathering data and cuts off automatically at the end of the 
1/4.  Gives you time to 60 mph, 1/8th mile and 1/4 mile.  It also has a fuel 
economy function that I haven't played with yet.

It only cost about $150 for the module, cables and software.  you supply the 
laptop.

Charlie


----- Original Message ----- 
From: "Doug Tallman" <dtallman at accnorwalk.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Thursday, May 22, 2008 7:53 AM
Subject: Re: [AT] O/T Tow truck OBD II question


> Charlie, I'm not sure where to send you for the info your looking for.
> You might check into Motors Driveability manuals. They aren't cheap but
> they would have the trouble code charts and will give what parameters
> should be. Basically the graphs are just charting voltages. What make of
> interface are you using? I've been thinking of getting a program that I
> can use with the laptop.  Some of them do a lot more than the scan tool.
> Does yours have bidirectional communication with the PCM?  On the O2
> circuit, high voltage is low oxygen and low voltage is high oxygen
> content in the exhaust. In a lean situation you would expect the voltage
> to stay low. You would also need to check fuel trims to see how much is
> being added. The computer will add fuel to make the O2 voltages come
> back to cross the centerline. Fuel trims can be reset with bidirectional
> control to aid in diagnosis. Doug Tallman
>
>
> charlie hill wrote:
>> Thanks Steve,  the O2 numbers were really just an example of what kind of
>> data I'm looking at.  It's not setting a code that indicates an oxygen
>> sensor problem.
>> However, there has to be a source of information out there related to the
>> ranges of all of the sensors along with some pictures of what the graphic
>> representations should look like.  That is primarily what I'd like to 
>> know.
>>
>> As for error codes the only one I'm having an issue with is a 0171, lean
>> condition, on Lynn's Buick.  I know how to find that problem.  I'll just
>> have to look a bit.
>>
>>
>>
>>
>
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at