160 baud reading

[Louis Baiani]

Okay, i'm going to reply to this because basically it's my fault why I couldn't
read it.  I had the ECM open from A to B on the diagnostic connector.  20K is
described as "normal" - and I thought that was a mode without data output
basically (as in 20K or higher the ECM considers out of diagnostic mode)

Louis

Louis Baiani wrote:

> I sent this to Peter Gargano.  Any info from someone using his software
> on an ECM outputting TTL levels is greatly appreciated :O)
>
> Hey Peter, I was trying to read the data stream off the Corvette with
> the adapter I made for the CLCC Buick (12V PWM).  I used the data in on
> the RS-232 like in the secondary diagram.  First trying to use the same
> timing option that I used with the Buick, I saw 5 or so rows fill up
> with data  - say at a rate of just a bit over 2 columns/sec.  - Now, I
> tried adjusting that rate, and basically I have not much luck, either I
> get more or less columns, but nothing over 5-6 or so.  Also, I notice
> the last row that is getting filled is data that is always changing
> values - the others stay at 0 I believe, or something fairly constant.
> Any suggestions?  Think this is a software or a hardware issue?  The ECM
>
> is outputting TTL logic in this case.  I should scope the output going
> into the RS-232.  This weekend comming up, should I log some information
>
> with a terminal maybe?  Has anyone tried the adapter and software with
> ECM's that output TTL?
>
> Louis
>
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