ALDL project

[Ward Spoonemore]

Yes mode 4 did sound interesting, but the problem, is that only P4 ECM have
this feature and virtualy erery one onf them require disfferent
interogation/response words. And the problem is the the changed taht you
woulds make don't blend in to the calibration very well.

For example you can alter the spark output at any given point, but this is a
global change, like tunring the distributer,
how do you translate this to a spark table. Very trickey, as a result after
if figured it out I never used it.

I have how ever used mode 2 and 3, my 1st download from a flash mem PCM was
done with mode 2, 64 bytes at a time.
Mode 3 letst you havwe na abreviated diagnostc of your own design that can
run up to a frame /


-----Original Message-----
From: owner-diy_efi at efi332.eng.ohio-state.edu
[mailto:owner-diy_efi at efi332.eng.ohio-state.edu]On Behalf Of Bruce
Plecan
Sent: Tuesday, March 02, 1999 6:35 PM
To: diy_efi at efi332.eng.ohio-state.edu
Subject: Re: ALDL project


Boy this mode 4 sounds neat,  any clues about how that's actually done..
Bruce

>Mode 1: Diagnostic data, 63 bytes long
>Mode 2: A memory dump (64 contagious bytes at a time)
>Mode 3: Selectable memory bump, may format and dump up to 8 bytes
>Mode 4: Provides the ability to alter specific ECM function on the fly.
AFR.
>EGR SPK Etc.
>Mode 7: Command mode, (restores normal operation)
>
>All of these command require the issuance of a message request for each
>occurrence of the desired mode.

>and what else would you like to know ?
>ard