Early E38 vs. New E38.....

[Redline Motorsports]

Definately don't want to beat it to death but.................

As long as pin assignments where the same (which I really don't know if they are..) and you write to a 09 PCM why should anything be different if you switched PCM's?

Why shouldn't it be any different then replacing your computer at home as long as the OS matches the hardware?

I wonder if there are other modules that are effected by this.

[gmh308]

Definately don't want to beat it to death but.................

As long as pin assignments where the same (which I really don't know if they are..) and you write to a 09 PCM why should anything be different if you switched PCM's?

Why shouldn't it be any different then replacing your computer at home as long as the OS matches the hardware?

I wonder if there are other modules that are effected by this.

'09 OS into '09 hardware, and '08 into '08 hardware is fine. From schematics I have seen, the pinouts are identical across the years, unless some odd feature was added/turned on (or deleted) in a later OS. Cant think of one, apart from say an OS that saw AFM added for '09. But that seems to be there in the background on all whether it is used or not.

But...the word "hardware" is probably a little off track. My understanding is that all hardware is pretty well the same, with same hardware OS/bootloader (some '05/06's different on this), but they become an '08 or an '09 once the first vehicle OS is loaded. After that there is no turning back.

But if you are talking an '08 ECM & OS into an '09 car or vice versa, then thats more of a crap shoot. Have definately seen issues where if the OS does not line up with the rest of the modules in the car, odd things happen.

Then again, Chris White added '10 launch control to his '09 Vette, so all the stars lined up on that one, but then trying to add later features to an earlier G8 for example does not go so well.