Carrera Gauge Swap

[idheaton]

I am guessing you already thought about this but since I did not see it mentioned I will throw it out there. Is it possible to swap he boxster lcd onto the carrera board?

[KevinH1990]

Originally Posted by idheaton

I am guessing you already thought about this but since I did not see it mentioned I will throw it out there. Is it possible to swap he boxster lcd onto the carrera board?

It will take someone with soldering skills/knowledge above my level. But, I'm planning to ask a speedometer shop in my area if they can do it. I don't want to have both units damaged so I'm not going to try it myself.

Thanks

[Reebuck1]

Thumper the reason I am having so much trouble ( I believe...not sure) is because I have 5.2.2 DME.

I think I have now successfully recoded the EPROM chip on my 986 mother board to "TURN ON" the volt gauge and oil pressure gauge.
Topradio, your suggestion to try different chip designators on the GQ-4X worked and I was able to read the chip.

I reinstalled the 986 mother board with the 996 gauges but volt and oil pres. still will not come on. Maybe because the 986 DME that thinks it is a 996 ROW will not recognize the 986 mother board??

Topradio, I am wondering if I need to also code the bits with the GQ-4x that identifies the gauge pack mother board as a 986. This is found on line 00000030 of the code as shown on post #15 and #13. ???? If I change that bit to indicate it as a 996 do you think it will work??

Does anyone know if there is a limit on the number of times you can try and reprogram one of these EPROM chips??

I still intend to put the 996 mother board back in car and take it to Porsche to turn on the cruise control.

[Reebuck1]

Guys, Hoping I can get answers from some tech savvy folks out there to my questions below.
Even if you are not sure give me your thoughts and they could be the answer. Thanks


I reinstalled the 986 mother board with the 996 gauges but volt and oil pres. still will not come on. Maybe because the 986 DME that thinks it is a 996 ROW will not recognize the 986 mother board??

I am wondering if I need to also code the bits (with the GQ-4x) that identifies the gauge pack mother board as a 996. This is found on line 00000030 of the code as shown on post #15 and #13. ???? If I change that bit to indicate it as a 996 do you think it will work??

Does anyone know if there is a limit on the number of times you can try and reprogram one of these EPROM chips??

[Reebuck1]

Here is a picture of the 986 digital gauges mounted on the 996 motherboard. You will note there are no digital gauges displayed. All you see are the lights normally behind the digital gauge faces. Reason.. the 996 digital gauges are defective and I removed them hopping I could attach good gauge faces later. But I was unable to find these digital face plates anywhere or get them repaired anywhere.


Next is the 996 analog gauges with the 986 motherboard and 986 analog gauges shown in their respective cluster half. Ready for assembly and installation in the car.


This picture shows the 986 motherboard but with a close up of the chip we have all been referring to 93c56B. It is located just to the left of center about 1/4 of an inch above the large square white digital gauge face. It is a small black chip with 4 small silver connections protruding out its top and bottom.


Last is the 986 motherboard cluster with the 996 analog gauges fully mounted in the car but the two outside gauges (volts & oil pres.) are not working.


I have been unable to get anyone to respond to my last questions on how to proceed so here are my next steps.

1) In the next few days I will try and recode the 986 motherboard so that it thinks
it is a 996 motherboard by changing the two places on the EPROM chip that allows you to select 996 or 986. If that works I'll post the exact bits and location needed to be changed. If the gauges still do not turn on I am lost as to what to do next.

2) Even if step 1 above does not work I will put the 996 motherboard back in the car and take it to the Porsche dealer to TURN ON the cruse control function with their PIWIS. I believe they should be able to do this because the 986 DME that thinks it is a 996 ROW DME should then allow the 996 motherboard to communicate with the 996 ROW flashed DME.

I HOPE !!!!!

If step one works I will still have to follow step 2.

Again if anyone sees something wrong here please let me know.