Carrera Gauge Swap

[Reebuck1]

Ok, here is what I am going to try.

I am going to take the used Mother board I got from the old 996 cluster I bought to make the swap with and re-assemble it with my original 986 analog gauges. Install it in the car and see if the car will run. If it does ( I believe it will) then I will take it to Porsche (to use their PIWIS) to TURN ON my volt and oil pressure gauges even though they will not be in the car. This should allow Porsches PIWIS to sink the 986 DME that thinks it is a 996 ROW DME with the cluster that thinks it is a 996 cluster because it now has the 996 mother board in it. Hopefully I can then bring the car home and put the 986 cluster with the 996 analog gauges in and all should work. I will have to recode the 986 mother board so that the two gauges read OPEN.
If anyone thinks I have lost my mind please let me know. I'll report back once I get it all done.
Keep your feed back coming it has helped a lot !!

[Chuck W.]

Originally Posted by Reebuck1

Ok, here is what I am going to try.....
!

You persistence and determination is admirable. Never give up, never say die..... and keep us posted.

[Reebuck1]

The learning point for me here was......I should have installed the gauges and cruise control BEFORE I put the 3.4 996 motor in the car and before I had the 986 DME flashed with a 996 ROW flash.!!!!!!!!!!!!!!!!!!!!!!!!!!

I have been told and I now believe my problem exists because…my new cluster is still recognized as a 986 while my DME is recognized as a 996.
So when Porsche did a control unit scan as a 986 model with the Porsche tester it failed as the DME did not recognize it as a 986. If the DME is scanned as a 996 the cluster will also fail because it is not recognized as a 996.

I.E. am doing what I posted below.


Anyone see anything incorrect with this logic please let me know.

Thanks to all, Reebuck1

[Reebuck1]

Just so you can all see there really are gauges in the car!!

[Reebuck1]

Took my 996 analog gauges with my 986mother board out of the car.
Remember car ran well and most gauges worked ( except volt & oil pres.)

Put my 986 analog gauges with the 996 mother board in the car.
...CAR STARTED and ran well.
...986 analog gauges did not work...I was not expecting that!!
...Maybe it is ok because the DME thinks it is a 996 ROW DME and still can not recognize or is not programmed for the 986 analog gauges.

Intend to now take car to Porsche to use PIWIS to turn on all gauges in the DME.
...should now work because DME that thinks it is a 996 ROW can now recognize
a 996 gauge cluster (996 mother board is now in car) as a 996.

Once above is complete I need to reinstall the 996 analog gauges with the 986 mother board back in the car and hopefully all will work. I believe it can only work if I recoded the control chip in the 986 mother board to "TURN ON" the volt gauge and the oil pressure gauge. I believe the PIWIS at this point may still not recognize the 986 mother board but I will not care because all the gauges should be working.

HELP !!!!! If anyone sees issues with this please let me know.
Thanks for every ones help.........

Mistake made......When I original installed the new gauge cluster in the car I made a mistake. I put the gauge cluster in first and then installed the heater vent that goes under the steering wheel and runs up to the dash vent next to the drivers side window. When doing it I incorrectly placed the wiring harness that runs to the "BLUE PLUG" on the back of the instrument cluster "underneath" the vent. So when I tried to pull out the cluster it would not slide out far enough for me to disconnect the BLUE PLUG from the back of the cluster. It took awhile for me to figure out what had happened. I had to remove the whole vent system on the drivers side of the car. I could then move the harness to the top side of the vent, reinstall the vent system and then was able to pull the cluster easily out far enough to remove the plug.