Clarifications on last Programming 101+ Dragging it out

[Steven Gorkowski]

You are doing a great job explaining just keep pushing on Bruce.

Steve

Bruce Plecan wrote:

> Subject: Re: Clarifications on last Programming 101
> >
> > Let me expand on your answer a little so the binarily inpaired can
> > understand :)
> > FD (Hex) is 1111 1101 in binary. This means from what Bruce has
> discovered
>
> I DID NOT DISCOVER THIS, a list member shared it with me,  this
> is far beyond my mental abilities.
>
> It also is mentioned in the "Net", but ya gotta dig for it.  BTW, I've
>
> mentioned where in numerous postings.  So while alot of what
> I write is obvious, ya gotta look real close, for the finer points.
> The bits are mentioned elsewhere, and the member explained
> the correlation to the error code.  Then I wrote to others to "get it"
>
> again.  This was a matter of digging for months, and writting to
> others (many).  And finding others to talk about it.
>
> THIS IS WHY I"M DRAGGING IT OUT, cause it takes a ton,
> of time to gather all the snippets, and follow them around.
> I'm also following leads on future projects.   This list has
> many gifted folks, I just got time to type.
>
> >       this bit ^  at address 050D controls the vss diagnostic.
> > F9 (hex) =  1111 1001 and
> >    this bit ^  is the knock diagnostic ie 0111 1001 = 79 hex
> > 39 (hex) = 0011 1001
> >    this bit  ^  is the egr diagnostic ie 0001 1001 = 19 hex
> >
> >  My hat is off to Bruce (How in the heck did you find this ??)
> >
> >The question is does clearing these bit(s) disable these
> functions or does it just turn off the error reporting ??
> >
> >Mike D.
> >
> I've spent a bunch of time being a pest, and writting to folks
> trying to get the pieces to the puzzle.  The info in the tuning
> stuff I wrote was basically "from my experiences".  Alot (most)
> this ecm stuff is from others, hence some errors in my
> interuption of things....
>
> Turning the malfunction flags off stops an error code from
> being stored, and when the diagnostic test is run by the
> ecm and it fails, it doesn't got into the limp home mode.
>
> Some tests aren't run, but some others are (see archives
> for the particulars).
>   It doesn't turn off the operation of say a egr valve solenoid
> apply signal, that is another "switch".
>   Another test of say EST still does the momentary addition
> of advance to the timing but when the EST reports the knock is
> present, it's
> says OK, or if not present OK, and goes back to
> other ecm functions..
>   Hope this helps to clarify the clarification.
> Cheers
> Bruce  Again I have no formal electronics training other than
>             at the vocational level, I'm no EE or Software Pro.  I'm
>             just sharing what I've found and OTHERS have told me.
>             I've tried to verify when possible, all that I've stated.