No sumcheck code in a '95 MEMCAL
Ludis Langens
ludis at cruzers.com
Thu Nov 5 05:36:46 GMT 1998
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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