Help, mystery green plug

[GreenLeggy]

Hello all, I was trying to solve my headlight problem today so I took the bottom part of the dash apart and while I was trying to figure out what was what, I saw a mysterious green plug, unplugged. When I plugged it in, and I started the car, the check engine light kept flashing. So, naturally, I disconnected it and went about my business, trying to fin other problems.

Now that I am here, I need you help trying to figure out what this plug is for...


http://i188.photobucket.com/albums/z269/Rd2002P5/IMG00033.jpg

http://i188.photobucket.com/albums/z269/Rd2002P5/IMG00035.jpg

Any ideas?

Thank you in advance to anyone trying to help.

[Plays_with_Toys]

It's a diagnostic plug. Don't plug it in.

[GreenLeggy]

so, i take it a diagnostic tool goes between both ends? :roll: :smt017

10-4 will not plug in...again. :smt018

Tx, btw...

[Huffer]

It's supposed to be disconnected. If you connect it the ECU goes into diagnostic mode.

Been discussed before, so I'm locking this one up for the archives...