ID'ing GM ECU

[Bruce Plecan]

----- Original Message -----
From: Bill Shaw <bshaw at connix.com>
To: <gmecm at efi332.eng.ohio-state.edu>
Sent: Thursday, May 13, 1999 12:17 PM
Subject: ID'ing GM ECU

Nothing here at CSH, HQ mentions any of these numbers, but we're still at,
MY 97.
Just letting ya know we looked, but came back empty
Bashful
> Hi guys,
>
> I have a GM ECU (I think it's from a Camaro) Service # 09354896 CKYA and
> HDW# 16220610.  Can someone please verfiy it's origin? What are these 2
> numbers representing?  I would expect the HDW# to identify the hardware,
> is the service number identifying a specific application of a more
> 'generic' hardware implementation?
>
> The processor (68 pin PLCC) has the following designations:
>
> 185
>       16245295
>        1H42C
>      Y0EVM97328
>
> Is this an hc11?  The crystal is marked D8982  9719. The 9719 looks like a
> date code. Can anyone tell from the other number what it's frequency is?
>
> It's using an Intel 28F4008X flash chip.
>
> Does GM usually use HC11s in their newer products?  What frequencies are
> the other GM ECUs running at?
>
> Thanks in advance,
>
> bs
>
>