I have now managed to read the ME7.2, using my Bench harness, lab supply and Galletto cable, so here is a quick how to:
1. The Power supply should be able to provide a minimum of 13v.... I use a Lab supply, tuned to give 13.5v DC output.
2. The wiring harness I use has mini clips on the ends of each cable but I will make up a harness which uses salvage ECU connectors for the ME5.2.2, ME7.2 etc. so that plugging in is quicker and safer in the future.
I have created a photo of the pinouts here:
http://www.cyberfooks.com/Porsche/Porsche-ME7.2-Bench-Flash-Pinouts.JPG
3. Connect the +12v to pins 1/1,1/2,1/7,1/8 AND 1/9
4. Connect the -12v to pin 1/5 OR 1/6
5. Connect the K-Line to pin 1/3
6. Power up the lab supply
7. perform the initial actions in Galletto to "ECU Detect"
8. Click on "Read ECU"
9. When Galletto tells you to reboot the ECU with pin 24 grounded, use the following proceedure instead!!!
9a) switch off the lab supply
9b) hold a -12v lead on the main circuit board position shown.
9c) switch on the lab power supply.
9d) after about 5 seconds, pull the ground lead away from the circuit board.
9e) tap OK in Galletto
9f) It should now be in boot mode and you should see galletto download a 512K file.
