[tunerpro] Re: Jetronic LE3 programming
- From: "Faulks" <faulks_m@xxxxxxxxxxx>
- To: <tunerpro@xxxxxxxxxxxxx>
- Date: Wed, 19 Aug 2009 22:55:03 +0100
Hi Ron,
Yes it's in a roll pin socket, so will be able to remove and replace a number
of times easily. I will go and look up the 27C64, or make up an adaptor for
something larger and see what can be done, thanks.
Thank you,
Martin
----- Original Message -----
From: Ronald Carlson
To: tunerpro@xxxxxxxxxxxxx
Cc: ronald.carlson.54@xxxxxxxxxxxxx
Sent: Wednesday, August 19, 2009 10:29 PM
Subject: [tunerpro] Re: Jetronic LE3 programming
Martin,
If it's equivalent to a 27C64 then making copies and being able to modify it
will be easy. It should run with an EPROM in place of the OTP. Is the OTP
socketed so it could be removed and the contents dumped on a Programmer?
Desoldering requires care though.
Ron
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From: Faulks <faulks_m@xxxxxxxxxxx>
To: tunerpro@xxxxxxxxxxxxx
Sent: Wednesday, August 19, 2009 4:16:36 PM
Subject: [tunerpro] Re: Jetronic LE3 programming
Thank you both Ron and ECU Boost much appreciate your fast response.
Ron, the chip is OTP without the window for erasing, so ties in nicely with
your description for the two date codes. Yes I can post a photo, I will take
one and upload a link.
Thanks you,
Martin
----- Original Message -----
From: Ronald Carlson
To: tunerpro@xxxxxxxxxxxxx
Cc: ronald.carlson.54@xxxxxxxxxxxxx
Sent: Wednesday, August 19, 2009 7:17 PM
Subject: [tunerpro] Re: Jetronic LE3 programming
Martin,
The Signetics chip number doesn't match the usual EPROM or PROM numbers,
not even close, looks like it may be waht is called a "house number", which is
an internal partnumber between the manufacturer and high volume customers.
Does is have a transparent window on the top? That would be the UV light
earsure window for clearing the data. The second and third lines look like
date codes - 1st week of 1990, and 34th week of 1989. Two date codes are
unusual unless it's a "one-time programmable" (no window), in which case the
earlier date is the manufacturing date and later date is the programming date
which ties to the data file they used. Can you post a photo of the chip on the
board?
Ron
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From: Faulks <faulks_m@xxxxxxxxxxx>
To: tunerpro@xxxxxxxxxxxxx
Sent: Tuesday, August 18, 2009 6:00:06 PM
Subject: [tunerpro] Jetronic LE3 programming
Dear list,
Looking for some help, wish to program the Jetronic injection system. I
have a LE3 version fitted to a Fiat Uno turbo. The pcb is fitted with a
socketed 16 pin IC (chip), I believe likely a TTL PROM or similar, and I know
people have changed these for different injector duty cycle - fuel maps etc. I
have a standard chip and wanted to experiment. My question, does anyone know
and please tell me what the IC is so I can purchase some blanks and start
experiment? I have access to EPROM and Prom programmers. The OE programmed
chip is a Signetics chip, with number: B57586 2nd and third line: 9001 8934.
Any hints or pointers would be very much appreciated.
Thanks,
Martin
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