LEDTech

As I was futzing around with my '02 WRX when I noticed a disconneted wire under my dash, behind the steering wheel. It has a lime green connector and was wrapped with blue e-tape. I think it had two leads in each connector and was of a super thin guage. T hought it was a relay coupled with a grounding wire. So I plugged it in. When I started the car the CHECK ENGINE LIGHT was going nuts. Has anybody else noticed this wire? And does anybody know what it does?

wrx10404

iTrader: (2)

It is one of the test connectors for the ECU. I would onplug it and leave it alone. If you leave it plugged in the CEL will stay on. It works in conjunction with the OBDII port. I am not sure what it really does. If you look closely there is also a little white connector there too. It also does something for the Ecu during diagnostic tests.

nachomc

iTrader: (7)

Get familiar with this thread here:

https://www.i-club.com/forums/subaru-general-30/subaru-secrets-some-might-impreza-only-59578/

LEDTech

Thanks for the info!

RoadSpike

It puts the ecu into a diagnostic mode which i think the Cobb access port uses to update the ecu info

Bagin,DVS

that is so funny when i got my car i was looking undethere to pass a wire through for my amp and saw it and did the same thing with the same results hahaha, that is funny. but i have an 02 rs, so it has to be the same shiit.