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

[BOWEN, SCOTT M. (JSC-CC)]

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].

Jim Wolf has informed me that the JECS 84 pin is the processor and the JECS
68 pin is the FLASH/A-D converter/microprocessor start up chip. The NEC
helps with whatever the 64 pin JECS chip can't handle.

Jim wolf has figured out how to input it's own program by using a daughter
board that connects via the 40 pin port, and can you believe the guy's won't
give me any ore info than that?

I have not given up yet! That is why I found this list...

I have also found a freeware program for editing Nissan EPROMS that works
great on the '89-'90 KA24E 12valve motor ECU as it has an EPROM [27C256]. If
anyone wants it, I will send it to them....

Scott Bowen
Bastard Motorsports Engineering
Houston, TX
281-244-9669

-----Original Message-----
From:	nacelp [mailto:nacelp at bright.net]
Sent:	Monday, March 20, 2000 2:34 PM
To:	diy_efi at diy-efi.org
Subject:	Re: I another new guy.....


If anyone sees hears smells of any editors for the Nissan, Toyo, Madsa, I'd
like to hear about it.  Seems like there is utter silence on these ecms
Grumpy

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