Nissan JECS ECU RE: I another new guy.....

[Swayze]

I did a search there one time on some chrysler chip numbers and came up with
an ECM, sorry I couldn't be more help. most of the searches I did on the
ISDN at work turned up the virtual interface spec. I did run across a book
that had connector pinouts similar to the GM ones though.
http://www.aeswave.com/Bookstore/book_ad550.htm
kinda expensive though.
the rest of it was russian diakom sites
byE
Mike
Swayze
mswayze at truswood.com
kswayze at bellsouth.net
----- Original Message -----
From: "BOWEN, SCOTT M. (JSC-CC)" <scott.m.bowen1 at jsc.nasa.gov>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, March 21, 2000 12:57 PM
Subject: RE: Nissan JECS ECU RE: I another new guy.....


> Thanks Mike...
> The ST7250 look like the one I need, but it only has 64 pins...mine is a
68
> pin....
>
> Scott Bowen
> Bastard Motorsports Engineering
> Houston, TX
> 281-244-9669
>
> -----Original Message-----
> From: Swayze [mailto:kswayze at bellsouth.net]
> Sent: Monday, March 20, 2000 4:42 PM
> To: diy_efi at diy-efi.org
> Subject: Re: Nissan JECS ECU RE: I another new guy.....
>
> had a little free time ,part# search at ST Micro on one of the chips
> mentioned yielded an MCU ST7250. don't know if its relevant or not. I can
> send you the .pdf if you want it.  the other numbers only gave serial
> transmisiion/encoder stuff with partial relevance. Dogpile kept throwing
up
> virtual interface architecture on any of the ECCS searches
> byE
> Mike
> Swayze
> mswayze at truswood.com
> kswayze at bellsouth.net
> ----- Original Message -----
> From: "BOWEN, SCOTT M. (JSC-CC)" <scott.m.bowen1 at jsc.nasa.gov>
> To: <diy_efi at diy-efi.org>
> Sent: Monday, March 20, 2000 4:12 PM
> Subject: Nissan JECS ECU RE: I another new guy.....
>
>
> > Well...
> >
> > My Nissan/JECS setup is out of a 1991 240SX with the KA24DE engine [2.4l
> > DOHC] and I have found out a few things.
> >
> > The ECU, with board #A12-001 B52, has a 40 pin port on the board just
> right
> > for a ribbon harness connector...
> >
> > It has one 84 pin processor with a JECS part number[M3M7790STJ], but
they
> > don't make it [of course] and they will not tell me who does [Oh, sorry,
> > Nissan owns that information], a JECS chip is a 68 pin [M6M72561J-I] and
a
> > NEC 44 pin [D65012L(A)904].
> >
> .........
>
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