944 S3 aka 944 to 968 drivetrain engine conversion
#1
Burning Brakes
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944 S3 aka 944 to 968 drivetrain engine conversion
So if anyone wants a full pinout of the DME connector and all the gory details including the wire colors here you go:
944 S3 wiring change chart (PDF)
944 S3 wiring change chart (Excel)
I found a very important missing bit of info. It seems DME pin 27 requires Term 15 power aka switched +12V. This is provided via the 14 pin DME connector that is under the dash on the passenger side. It is used primarily to provide the diagnostic port access to the DME. However pin 7 of that connector goes to DME pin 27. The wire at pin 7 is black.
Without power to pin 27 the DME is only half awake and it will appear as though you have a bad DME relay. Then after jumping the relay, testing crank position sensor output all is good. So you check for switched ground at DME pin 36 (pin 85 DME relay) and it fails and the finger points at a bad DME.
I wasted a lot of time chasing that. I should have read all the pin definitions on the DME. Anyway it all works
Hopefully it will help you out and you won't go through what I went through. Story at 11 can be found here
Fronkenstein
944 S3 wiring change chart (PDF)
944 S3 wiring change chart (Excel)
I found a very important missing bit of info. It seems DME pin 27 requires Term 15 power aka switched +12V. This is provided via the 14 pin DME connector that is under the dash on the passenger side. It is used primarily to provide the diagnostic port access to the DME. However pin 7 of that connector goes to DME pin 27. The wire at pin 7 is black.
Without power to pin 27 the DME is only half awake and it will appear as though you have a bad DME relay. Then after jumping the relay, testing crank position sensor output all is good. So you check for switched ground at DME pin 36 (pin 85 DME relay) and it fails and the finger points at a bad DME.
I wasted a lot of time chasing that. I should have read all the pin definitions on the DME. Anyway it all works
Hopefully it will help you out and you won't go through what I went through. Story at 11 can be found here
Fronkenstein
Last edited by Fronkenstein; 04-11-2016 at 10:05 PM.
#3
Three Wheelin'
Thank you!! I hope i dont run into any weird LHD vs RHD differences!
#4
Burning Brakes
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#7
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provide the diagnostic port access to the DME
How can I add again a diagnostic port?
Thanks.
MN
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#8
Burning Brakes
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Apparently the setup is similar in 1988+ 928's, 964 and potentially other models.
Fronkenstein
#10
Burning Brakes
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Do you just want the connector or the entire harness with connectors? If its the latter Porsche probably doesn't have one and if they did it would probably be $10K
Fronkenstein
Fronkenstein
#12
Mines still going strong after 6 years now? My dad had it swapped when he owned the car but we had to tinker to get the AC to properly activate.
One of the venders printed me a "3" in the S2 font for the rear badge, i should really get that on the car.
One of the venders printed me a "3" in the S2 font for the rear badge, i should really get that on the car.
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#14
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I hope you drive that GTS the way it was meant to be driven