1999 truck PCM's ROM

Ian Jones ian at cobi.demon.co.uk
Sun Jan 24 14:10:27 GMT 1999


There are methods to read in situ but not the way you are suggesting doing
it. Your EPROM reader will supply 5V to the whole board and the processor
will start driving lines your EPROM reader is driving. Not good.

What processor is in the unit?

Ian

www.cobi.demon.co.uk

> -----Original Message-----
> From: owner-diy_efi at efi332.eng.ohio-state.edu
> [mailto:owner-diy_efi at efi332.eng.ohio-state.edu]On Behalf Of Jake
> Sternberg
> Sent: 23 January 1999 17:15
> To: diy_efi at esl.eng.ohio-state.edu
> Subject: 1999 truck PCM's ROM
>
>
>
> I have a PCM (powertrain Control Module a.k.a. ECM)
> from a 1999 GMC sierra pickup truck.  The connectors
> are almost bigger than the circuitboard itself.
>
> Well, anyway.. i have it open, and here's the info
> from the flash ROM chip:
>
> Intel
> 16236995
> AB28F400BX
> E 5012
> U7400142Q
> Flash
>
> 44 pins
>
> It's a surface mount device, but i plan to solder
> little wires to it and to a connector so i can
> plug it into my ROM burner (while it's in vivo).
>
> Does anyone have any suggestions or information
> as to whether this could be a bad idea or has
> anyone done it?  I asked GM for a PCM programmer
> kit but surprisingly, they refused to give me one.
>
> Thanks!
>
> -jake  chickens at mail.utexas.edu
>




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