ECU

[Ross Myers]

>Hi, can some one point me to, or give me a sumarry of the various
>types of boxes that come under the banner GM ECU's.
>
>I know and have seen:
>
>uses 24 pin eproms C3 ECM
>
>uses 28 pin eproms with 2 black chips (limp res nets of sumpin) 2
connectors
>P4 ECM
>P4 derived PCM
>
>uses 32 pin eprom 3 connectors
>?????????
>
>
>
>uses eeprom or flash or sumpin
>???????


I'm guessing at the correct names here Wayne, but the P5's? were used on our
VR Commodores, same connectors as P4 808's etc, but did full trans control
as well, the PCB is probably double the size of an 808 and it uses a 27512
28pin ROM.

The P6?, was used in the VS & VT Commodores, it has 3 connectors and uses a
27010 32pin ROM, very different design to P5.

And finally, as usual Holden are way behind to the rest of the GM world so I
don't know about the latest Flash PCM's ;-)

Ross Myers