Update:
The bad news first: I was trying to read the DME on the 964 3.6 in my Targa. This should have been a pretty straight forward task. Plug the 8-pin AMP connector that goes into the Hamer into the short Bosch adapter and that goes into the PST2. However, despite numerous tries the PST2 did not find the DME. What a bummer. I think I have to chase the signals and check if something is mis-wired. Wired, the Hammer still finds the DME just fine. Maybe it is not as demanding and does not need the L-line. We will see.
The good news: Out of sheer frustration I went ahead and hooked the KTS 500 cable up to the 996. And surprise surprise the PST2 found the DME. I knew at the time that the standard Bosch-OBD2 cable is different from the Porsche version. So with new-found inspiration I went ahead and converted the cable to Porsche specificatons. And that lead to full success. See for yourself.
First, the PST scans the vehicle and highlights all control units found in the car. For the C4 coupe it found the PSM and all other moduls expected. The "#" in front of a unit means there are stored fault codes:
Well, the faults are because the battery died on me. So the POSIP complained and so did the alarm unit if it can't lock/unlock the doors or move the windows. So I went ahead and erased the faults:
And voila, the next scan comes up clean. No more fault codes. So my first little job has been completed successfully:
Ingo