2002 996 (USA) OBD-II pins 1, 3, and 9

[wrljet]

For a 2002 US model 996, does anyone have documentation on what Porsche uses

pins #1, #3, and #9 for in the J1962 OBD-II connector?

(these pins are left undefined by the OBD-II spec, available for manufacturer use)

Thanks,

Bill

[Loren]

A1 (black/red wire) goes to Fuse B10

A3 (orange/blue) goes to all the cars controllers

A9 (violet green goes to the automatic Exhaust Gas Recirculation examination pin A6 (IN SIGNAL) and to pin D17 on the DME (IN SIGNAL)

[wrljet]

Does pin 3 (orange/blue) go to car's controllers other than the DME,

for the dealership diagnostic tools?

Is there any documentation (official, reverse-engineered, or whatever) available

on that interface?

Thanks,

Bill

[Loren]

You are correct A3 goes to all "other" controllers.

The only info I have seen describes the interface to the DME for "generic" scanners - not the other controllers.