Quote:
Originally Posted by Qmulus
I do believe there are differences in the firmware between the '01-'02 and '03+ 996 (and 986 for that matter) clusters, but I don't know what exactly they are. I have the tools to program the micro controller, but I haven't played with that part yet.
I have an '02 cluster in my '03, and one difference is that the '03 with MOST optical bus for the audio system uses the cluster to compare to the headunit for security. You do need to program the cluster for the headunit or you will end up having a locked up radio at some point, maybe eve immediately. BTDT.
I have gone through and read a bunch of various (turbo, Carrera 2, Carrera 4, Carrera 4s, Cabs, etc.) 996 clusters (I have the ability to read and write the EEPROM through the OBD2 port) and found you can do some weird things on these clusters, like enabling the boost pressure display from the 996 Turbo on a 986 cluster that has the dot matrix display. Not really useful, but kinda cool.. I have started to make a memory map of the different functions, but like everything, there is only so much time I can spend playing with stuff...
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I would not argue with you, there may be firmware differences. My experience is most if not all of the differences are software. My 03 boxster has MOST but that dropped out long ago when I took out the OEM radio and amp and installed a standard double din. MOST doesn't even show up as a fault in my car. I do not have much of a memory map, it was more expedient to get a .bat of a cluster that was coded to what I wanted and re-flash my replacement cluster. About all I know is that mileage is recorded in offset 300 and again in 500. The VIN is in the first two lines. Some 90 (no ops) show up when going from the 4wd to 2wd 996 gas tanks. A memory map would be most useful and I hope you will share it with me when you get there.