I'm trying to read the AT25020 on the instrument cluster from a 2005 Chevy Astro.
I'm using GQ-4x4 with SOP16/8 DIP8 REV3 adaptor (don't know who made it, don't remember where I bought it but google images shows dozens from several makers and they all look just like mine).
Every time I attempt to read the chip I get all zeroes, every memory location shows 00.
I know that can't be right because I can verify that somewhere in there is the odometer reading which is 171522 and the trip odometer shows 1100.9.
When I power it up, it won't display (which doesn't matter much) and I can't get a read of the chip -- or, rather, I get numerous reads of the chip, each one different.
What made it work was reducing the speed to -2 (may not have to go that far down but that worked).
getting all zeroes
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Posted - 02/07/2017 : 16:32:23
