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02-18-2021, 10:01 PM | #1 |
Scooby Newbie
Member#: 488985
Join Date: Aug 2018
Chapter/Region:
MAIC
Location: pa
Vehicle:2009 wrx dgm |
Aem inline wideband help.
I bought what I thought was an aem x series wideband that was pnp through the rear o2 however it's pinned at the connector for 12v, 0-5v(+), sensor ground and ground. I'm horrible with wiring so after look at factory service manuals for my 09 wrx for a while it doesn't look like the rear o2 plug has an actual ground on it, just sensor ground. Will I need to run a separate ground from the aem unit or does the rear o2 ground somewhere I can't find?
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02-18-2021, 10:07 PM | #2 |
Scooby Guru
Member#: 50586
Join Date: Dec 2003
Chapter/Region:
BAIC
Location: Chiraq
Vehicle:64 Impala |
im not aware of any AEM wideband that's PNP....they are all used as a standalone sensor as far as I know
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02-18-2021, 10:12 PM | #3 |
Scooby Newbie
Member#: 488985
Join Date: Aug 2018
Chapter/Region:
MAIC
Location: pa
Vehicle:2009 wrx dgm |
They're not pnp from aem, I thought I was buying a used i-wire pnp aem wideband, I'm not sure if I can link it or not. Its the 30-0310 controller that outputs the canbus signal to the rear o2 harness so you can enable custom sensor input in the access port and get wbo2 readings. i-wire has there's grounded to the body which this one does not, I'm trying to figure out if there's a ground on the rear o2 harness or if I have to re wire it.
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02-18-2021, 10:13 PM | #4 |
Scooby Guru
Member#: 50586
Join Date: Dec 2003
Chapter/Region:
BAIC
Location: Chiraq
Vehicle:64 Impala |
i see it's just the sensor and controller without the gauge, are you trying to datalog through the AP?
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02-18-2021, 10:14 PM | #5 |
Scooby Newbie
Member#: 488985
Join Date: Aug 2018
Chapter/Region:
MAIC
Location: pa
Vehicle:2009 wrx dgm |
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02-18-2021, 10:50 PM | #6 |
Scooby Guru
Member#: 50586
Join Date: Dec 2003
Chapter/Region:
BAIC
Location: Chiraq
Vehicle:64 Impala |
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02-18-2021, 11:16 PM | #7 | |
Scooby Newbie
Member#: 488985
Join Date: Aug 2018
Chapter/Region:
MAIC
Location: pa
Vehicle:2009 wrx dgm |
Quote:
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03-25-2021, 04:26 AM | #8 | |
Scooby Newbie
Member#: 499183
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: NY
Vehicle:2019 STI |
Quote:
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03-25-2021, 04:30 AM | #9 |
Scooby Newbie
Member#: 488985
Join Date: Aug 2018
Chapter/Region:
MAIC
Location: pa
Vehicle:2009 wrx dgm |
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.
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03-25-2021, 04:45 AM | #10 | |
Scooby Newbie
Member#: 499183
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: NY
Vehicle:2019 STI |
Quote:
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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03-26-2021, 10:24 PM | #11 | |
Scooby Newbie
Member#: 488985
Join Date: Aug 2018
Chapter/Region:
MAIC
Location: pa
Vehicle:2009 wrx dgm |
Quote:
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