[tunerpro] Re: Jetronic LE3 programming
- From: Ronald Carlson <ronald.carlson.54@xxxxxxxxxxxxx>
- To: tunerpro@xxxxxxxxxxxxx
- Date: Wed, 19 Aug 2009 14:29:18 -0700 (PDT)
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
________________________________
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
>
>
>
>
________________________________
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 aSignetics
> 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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