I didn't see this in the archives and thought I would share it with my fellow e28 enthusiast.

Remove your data link connector cover and looking at the the center look for the pacman like its eating down. The pie shape is down. The locate pin 7 which is the outside pin at the 6 oclock position and pin 19 which is the inside pin at the 9 oclock position. Turn your key to on but do not start engine. Then ground the 2 pins with a paper clip for 9 seconds and your inspection light will reset. Make sure you identify pin 7 and pin 19. If you need a diagram I can email it to you.

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