964 DME version coding
09-10-2002 | 10:25 PM
#1
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Joined: Nov 2001
Posts: 135
Likes: 2
From: Santa Barbara, CA
964 DME version coding
I was wondering if someone could educate me about the version coding plugs on a 964 DME beyond the scope of the Porsche workshop manual.
The workshop manual makes it look like the 2-Pin connector decides about Tiptronic vs. stick shift. The 3-Pin connector has three choices:
OPEN Cat ROW (not US+Jp)
+12Volts Cat US+Jp
GROUND no CAT
GROUND seems to disable closed loop operation. Does anyone know the difference between OPEN and +12 Volts in terms of what the DME does? Does it call up different fuel maps and/or ignition maps?
When you read out the chip you sure see multiple ignition maps and timing maps. It would be cool if someone could shed some light into this.
Ingo <img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />
The workshop manual makes it look like the 2-Pin connector decides about Tiptronic vs. stick shift. The 3-Pin connector has three choices:
OPEN Cat ROW (not US+Jp)
+12Volts Cat US+Jp
GROUND no CAT
GROUND seems to disable closed loop operation. Does anyone know the difference between OPEN and +12 Volts in terms of what the DME does? Does it call up different fuel maps and/or ignition maps?
When you read out the chip you sure see multiple ignition maps and timing maps. It would be cool if someone could shed some light into this.
Ingo <img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />
10-05-2002 | 03:28 PM
#2
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Joined: May 2002
Posts: 1,115
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From: CT & Florida
Pcar, I'm fairly new to this board, but having a '91-964-C2, your thread caught my eye- Have U tried on the 964 Area? There are several sharp guys that hang out & may point U in some direction
<img src="graemlins/wave.gif" border="0" alt="[byebye]" />
<img src="graemlins/wave.gif" border="0" alt="[byebye]" />
