Quote:
Originally Posted by WaltPA
While your concern is valid, I also tend to hope that engineers are lazy, and would not bother changing the communication protocol just for fun. So, I would think it is more likely that the new Nav system still uses ACP, than not.
Now, we just need to wait for some clues to become available, like an '08 wiring manual.
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Hey... I'm an engineer and I take offense at that lazy remark!!!
I'm sure it uses ACP.... but ACP is likely just an underlying protocol that says out a message is formatted but doesn't limit what messages can be sent. Otherwise it would be completely non-extendable and therefore pretty much obsolete when it went out the door (hey...no remarks about how the system WAS obsolete rolling out the door). The new PCM might send out some messages that our PCM doesn't... and the new head unit might use some of them to create the hybrid displays. If so it might not work even if it is using ACP.
Just saying its a risk.... backward and forward compatibility is a tricky subject and frankly the auto industry has never bothered to even try because its generally not in their interest... they don't want you to upgrade your current car... they want to sell you a new one!