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Old 03-25-2021, 04:45 AM   #10
siete
Scooby Newbie
 
Member#: 499183
Join Date: Mar 2019
Chapter/Region: Tri-State
Location: NY
Vehicle:
2019 STI

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Quote:
Originally Posted by Savage388 View Post
They had to, I actually have up on the diagrams and just plugged it in and it worked...well sort of. There's a voltage offset issue I think front not having it grounded properly. I'm getting an afr of 15:1 at idle/cruise on the wideband where the front o2 reads 14.5-14.7. It's been calibrated per the aem chart as well so it's not that.
Not sure man, IIRC, looking at the back of the connector:
Top left (#1) will be the heater wire for the rear o2 sensor, which is plugged on iWire's connector.
Top right (#2) red wire 12v power.
Bottom left (#3) white wire 5v signal.
Bottom right (#4) brown wire signal ground.

Power ground is a separate wire terminated with a ring connector to chassis ground.
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