Closed Loop Disable in $6E

[Bruce Plecan]

Take say Hexshop,
go to 0445
set to FE
correct check sum
Drive car.

My *way*
also disable, codes  13-44-45
I have seen a few 747s get confused by not diabling the diagnostice flags,
so rather then risk messin around, I just do it all at once.
Cheers
Bruce





> Couple questions:
> 1) Is the address OxC445, or a mistype and should be Ox445?
> 2) If it is 0xC445, what is the offset being used by the microcontroller?
> The $6E code is in a 27C32 Prom which only has 32kbits of memory, or 4k
> bytes, which addresses to a max of 0x1000.  0xC445 is out of this range.
> 3) Assume setting to FF would make it max temp, or is it a signed number?
> (Guess I'll just have to play with it when I figure out the location.)
>
> Thanks for the help so far!
> Steve
>
>
> -----Original Message-----
> From: Michael Davis [mailto:davis at mail.eecis.udel.edu]
> Sent: Tuesday, January 30, 2001 9:36 AM
> To: gmecm at diy-efi.org
> Subject: Re: Closed Loop Disable in $6E
>
>
>
> How about the closed-loop min. temp?  (0xc445)
>
>
> In message
> <8CFC65F1B157D411B42A009027E301B5CBBC92 at xlvmail.xlvision.com>,"Marte
> ney, Steven J." writes:
> >Recent discussion on open loop tuning got me to searching.  There was
> >mention of a Closed Loop Enable vs. Temp constant, possibly in an $8D
mask,
> >just guessing.  I looked for it in $6E stuff under TunerCat and one ECU I
> >have for Winbin.  The only thing close are the Hot, Warm, and Cold Closed
> >Loop O2 Timers, max setting of 512 seconds each.  Can anyone help disable
> >closed loop in a $6E, specifically APYU3516 (89 '165 MAF Fbody 350 A4)?
> >Thought about unplugging O2 sensor but figured it would throw a code and
go
> >limping home.
> >
> >Steve
>
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