No sumcheck code in a '95 MEMCAL

[David A. Cooley]

Hi Ludis,
Yes, The Memcal for the 1994/5 Buick LeSabre has no sumcheck either...
It is also OBD_1.  The it's a 64K byte (27C512) eprom and the PCM is a GM P6.
The PCM is a 16211694, service code 16183247.
Memcal's I know it uses are BMYU1714 (95 LeSabre VIN L 3800), CABX (no
numbers, Supersedes BMYU1714)
and BHDU4751 (1994 Olds Silhouette Van, Chevy Lumina Van).
Later,
Dave



At 09:33 PM 11/4/98 -0800, you wrote:
>I've been disassembling a MEMCAL from 1995.  It's BCC BKLL1692, used in
>the 16196401 ECM.  It's for a W-body with the VIN X 3.4 SFI DOHC
>engine.  The 32K byte EPROM (27C256) has the standard 9 byte P4 header,
>but the sumcheck field doesn't match the computed sumcheck.  Further,
>the program code does not contain a sumchecking subroutine!
>
>Has anyone else found a MEMCAL like this?  Could this be in preperation
>for OBD II?  (This MEMCAL&ECM are just OBD I.)
>
>-- 
>Ludis Langens                               ludis (at) cruzers (dot) com
>Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
> 
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           David Cooley N5XMT           Internet: N5XMT at bellsouth.net
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       I am Pentium of Borg...division is futile...you will be approximated.
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