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1gcrazy
Gear Head
Posts: 4
Joined: Fri Jan 18, 2019 4:06 pm

How can I read EECIV binary off board?

Post by 1gcrazy » Mon Jan 05, 2026 8:51 pm

I’ve already desoldered an EECIV chip off the board and curious how I can backup the chip? Assuming these are eproms(not eeproms), what’s the process to uv erase one of these for reflashed? I’m certain if this is possible it’s already been done but I tried searching but the server load is too high(please try again later) so here I am.

jsa
Tuning Addict
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Joined: Sat Nov 23, 2013 7:28 pm
Location: 'straya

Re: How can I read EECIV binary off board?

Post by jsa » Wed Jan 07, 2026 6:01 am

The usual process is to leave the prom soldered to the EEC and use DCL if it has it, or use a QH and BE or TP to read out the prom.

The prom is not usually reflashed, but instead a QH or J3 chip is used to serve the binary to the EEC.

The UVPROM can be erased using a UV light source for a period of time.

Writing the UVPROM, requires finding the correct hardware and software. Not so easy and dearer than current methods mentioned above.
Cheers

John

95 Escort RS Cosworth - CARD QUIK COSY ANTI / GHAJ0
Moates QH & BE
ForDiag

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