GM 2.8L V6 ALDL

[Shawn R. Lin]

Ross Myers wrote:
> 
> >> Maybe the checksum calculated by Carbytes 2.0 is wrong, and that's the
> >> problem?
> 
> It is NEVER wrong!!.
> 
> >> When I tried sending $F0,$58,$01, it automatically calculated the
> >> checksum as $B9.
> >
> >Nope.  Should be $B7.  No wonder it ignored the request.
> 
> You don't need to workout the Checksum byte, Carbytes will add it
> automatically.
> If you type it in as part of the stream to send, Carbytes will add it's own
> checksum byte on the end of yours.

[snip]

Thanks, that is exactly correct.
Now I'm convinced that I'm sending the ECM the correct Mode1 string, but
I can't get the timing right.  I know SOMETIMES the string is getting to
the ECM as the DIC says "DIAGNOSTIC MODE", but it's only ever for a
split second.  The longest time it has said that was 3 seconds or so.

Shawn



________________________________________________________
                           1stUp.com - Free the Web
   Get your free Internet access at http://www.1stUp.com
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org