Why is this green plug not connected? - Subaru Forester Owners Forum
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post #1 of 51 (permalink) Old 01-02-2008, 09:15 PM Thread Starter
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Question Why is this green plug not connected?

Does anyone know what this plug/connector is for and why it's disconnected?








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post #2 of 51 (permalink) Old 01-02-2008, 09:37 PM
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It's supposed to be disconnected. If you connect it the ECU goes into diagnostic mode.


~ Silke ~
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post #3 of 51 (permalink) Old 01-03-2008, 06:32 AM
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Also used when flashing your ECU with an AP.

Whatever you do, do it right.


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post #4 of 51 (permalink) Old 01-03-2008, 12:54 PM Thread Starter
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Quote:
Originally Posted by pleiad7 View Post
It's supposed to be disconnected. If you connect it the ECU goes into diagnostic mode.
Quote:
Originally Posted by abacall View Post
Also used when flashing your ECU with an AP.
ohhh..okay thanks for the inputs silke & abacall much greatly appreciated

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post #5 of 51 (permalink) Old 01-03-2008, 03:25 PM
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post #6 of 51 (permalink) Old 03-25-2008, 07:05 AM
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I connected it while I was installing my stereo. I thought I disconnected it somehow. When I turned on the car, I almost had a heart attack! lights blinking, fan turning on and off! Don't do it!
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post #7 of 51 (permalink) Old 12-12-2008, 09:01 AM
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LOL I was trying to figure out why the cruise control didn't work in my 99 when I found plugs like that under the dash and connected them. When I started the car a "disabled" alarm I didn't know was there started going crazy. That was the start of a big headache. I wound up installing a new alarm, which I wanted anyway, but still.
And no cruise. Nice to finally know what the green plugs are for though.

1999 Forester N/A 5MT
2000 Outback N/A 4AT
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post #8 of 51 (permalink) Old 01-03-2009, 09:31 PM
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lol, i just did it like 5 hrs ago and just randomly stumbled into this post, ha. i was like 'wth!!?" i assumed it was a cord that came unplugged cuz my roof clock stopped werking, i was ronnng
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post #9 of 51 (permalink) Old 01-07-2009, 10:42 AM
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I am all too familiar with those two little plugs...

DOM3 STi, Frontier CC Pro-4X
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post #10 of 51 (permalink) Old 05-22-2009, 11:36 PM
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on my jdm forester this green connectors is a "stand by" mode for check engine module (OBD2 or CAN bus), and black connectors for self-diagnostics.


FXT 07 EDM
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post #11 of 51 (permalink) Old 07-13-2009, 10:34 AM
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a green plug story

Quote:
Originally Posted by pleiad7 View Post
It's supposed to be disconnected. If you connect it the ECU goes into diagnostic mode.
And what is the purpose/why would one want to run diagnostic mode?

I found these little guys when I was looking for the cause of a CEL P0420 (catalytic converter). I had the cat tested, it was ok. I was looking around and saw these green plugs so I stuck them together. Now my CEL was blinking!? I go to get the code read again with this connected; I pulled eight (8!) different codes, none of which was the old P0420. The codes happened to be just 4 problems all of which had opposite, contradicting codes. I unplugged the green connection before I left the parts store and to my surprise everything was fine after that. (At least I hope so...)

'03 FX Subaru /size 11.5 Shoebaru
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post #12 of 51 (permalink) Old 09-15-2009, 03:38 AM
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post #13 of 51 (permalink) Old 09-21-2009, 06:11 PM
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WHERE IS THIS PLUG LOCATED, UNDER DASH OR UNDER THE HOOD?
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post #14 of 51 (permalink) Old 09-21-2009, 06:58 PM
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Quote:
Originally Posted by SPIKE304 View Post
WHERE IS THIS PLUG LOCATED, UNDER DASH OR UNDER THE HOOD?
under dash, IIRC drivers side next to steering column

04 FXT 5MT Stage 2

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post #15 of 51 (permalink) Old 10-07-2009, 10:26 AM
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Quote:
Originally Posted by ntech View Post
I connected it while I was installing my stereo. I thought I disconnected it somehow. When I turned on the car, I almost had a heart attack! lights blinking, fan turning on and off! Don't do it!
i can image how you felt something like this -
when i installed my first stereo, i was suspicious of everything being wrong :)

and when i lost my fuel needle behind disasambled dash, i also found those green plugs, thinking that the first two owners must have unplugged them

btw, its been a month and still no sign of my needle

06 XT, yes, in silver
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