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AEM wideband wiring help....

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Old Jul 1, 2020 | 07:02 AM
  #1  
Matthew Blunk's Avatar
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AEM wideband wiring help....

Yes, I've searched, and seen the write ups.

I'm attempting to wire the Aem uego wideband sensor in the #2 O2 sensor slot for data logging and tuning on my accessport. This is NOT the aem X kit with the gauge, it's just the sensor.

It came with no pin out or diagram, for the connector on the sensor itself. I can find whatever wires I'll need on the car. But since I don't know what the pins on the sensor are, I don't know what the sensor needs, and what pins to connect.

There's multiple write ups that explain where to find the voltage and data wire on the car, and which 2 wires to tap into from the ecu....but not which pins they connect 2 on the sensor. And even so, that still leaves 3 more wires on the sensor....for the heater and whatever else, and I'm not sure what they need. (12V, ground, etc...)

I know people here have done this. If I haven't been clear enough in my explanation, please let me know.
Any info would really help. Thanks
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Old Jul 1, 2020 | 07:22 AM
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Unless the accessport can act as a controller, you have to have the gauge in order to get any data out of the sensor. It needs a controller.
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Old Jul 1, 2020 | 07:51 AM
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Matthew Blunk's Avatar
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Originally Posted by Project_Broke
Unless the accessport can act as a controller, you have to have the gauge in order to get any data out of the sensor. It needs a controller.
The AEM uego sensor has a controller in the wire. And the accessport has the software to run it. That's why they sell it like that. However the wiring is different then the Kit with the gauge.
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Old Jul 1, 2020 | 08:59 AM
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Originally Posted by Matthew Blunk
The AEM uego sensor has a controller in the wire. And the accessport has the software to run it. That's why they sell it like that. However the wiring is different then the Kit with the gauge.
To my knowledge, they are just a Bosch 4.2 or 4.9 sensor. I could be wrong, but I don't see a way to have a controller in the wiring.

Any way to link to where you got the sensor?
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Old Jul 1, 2020 | 10:24 AM
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Matthew Blunk's Avatar
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Originally Posted by Project_Broke
To my knowledge, they are just a Bosch 4.2 or 4.9 sensor. I could be wrong, but I don't see a way to have a controller in the wiring.

Any way to link to where you got the sensor?
idk...It's all becoming a little confusing at this point. Check this out. Read the description

https://www.maperformance.com/produc...go-kit-30-2002

I've seen write ups for Evo's and subbies , where people said they just used the sensor, but they don't have any real info other than tapping into the wire for the rear O2 sensor, and how to set up the access port for it. All that seems easy. I was looking for the pin info on the sensor side.
I emailed AEM, and they also said I need a controller. I called MAP today, but haven't heard back yet.

So idk what's the truth at this point. But I'm going to find out

Last edited by Matthew Blunk; Jul 1, 2020 at 10:25 AM. Reason: More info
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Old Jul 1, 2020 | 02:45 PM
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See if you can use the wiring the schematic from a standalone like an infinity, Link, Haltech,etc. Those units have the ability to accept an external sensor without the gauge. With the schematic you should be able to trace what wires you would need to tie into the ecu from the sensor itself I would think.
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Old Jul 2, 2020 | 05:11 AM
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Matthew Blunk's Avatar
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Originally Posted by ronaldo9
See if you can use the wiring the schematic from a standalone like an infinity, Link, Haltech,etc. Those units have the ability to accept an external sensor without the gauge. With the schematic you should be able to trace what wires you would need to tie into the ecu from the sensor itself I would think.
That​​​​​s exactly what aem gave me, lol. It tell sme the wire colors on the stand alone side, but not the sensor side. And they gave me a pin diagram for what they think is the sensor I have, but the diagram has 6 pins...mine has 5....and the wording might as well be Chinese. I could work with something that said for example...pin1: 12+ , pin 2: switched pos, etc.... But it says things like , pin 6: IP.... whatever that means. (I actually looked some of them up and know what IP is. But it's not all that helpful)
I'll see if I can figure out how to post them here. Maybe you can make better sence of it.
I've been working on vehicle electrical wiring for a long time. I can't believe how hard it is to get a pin diagram for an O2 sensor. Even from the company that makes it. Seems like something they'd have.

Last edited by Matthew Blunk; Jul 2, 2020 at 05:21 AM. Reason: Spelling
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Old Jul 2, 2020 | 07:18 AM
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Originally Posted by ronaldo9
See if you can use the wiring the schematic from a standalone like an infinity, Link, Haltech,etc. Those units have the ability to accept an external sensor without the gauge. With the schematic you should be able to trace what wires you would need to tie into the ecu from the sensor itself I would think.
So this is what AEM sent me. Which IS what I was asking for. My only issues are that I don't have any wire in pin#2 slot, I'm not sure what pin 4 needs (power /ground/ etc..), and I'm assuming pin#1 - UN - needs ground..?

looks like the last 2 are the sensor signal wires. Although IP is for air pump electric current...and I'm not sure what that means.
I was going to just wire it up using this pin out (after figuring out what pin 4 needs). But then AEM decided to tell me that wiring in this 5v sensor without a controller can fry my ecu. I doubt that's the case, but a little confirmation from MAP or AEM, or COBB , that this actually works as described , by wiring it directly and using the access port, would be nice.



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Old Jul 26, 2020 | 06:55 AM
  #9  
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I am having a nightmare of a time getting this to work.

All I want to do is log my wideband on the accesport.
First I bought just the sensor....and despite asking and talking to every manufacture of the parts involved, I was told I needed the guage/controller.
So I returned the sensor, and bought the kit with the gauge.

Wired it up, gauge works great. Wired it to work with the accesport......nothing.
And NOW I read that it's not set up to work with the X series!!? Can someone confirm this?
The X series dosent appear any different than the other AEM wideband (which I didn't even know existed before)

So am I screwed now, and have to buy a THIRD wideband, an older version???
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Old Jul 26, 2020 | 07:43 PM
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Does it not have the 0-5v and serial output wires on one of the harnesses? My 4110 does. From what I understand is the serial wire can be pinned to work with the Tactrix (stand-alone) only logger via a 2.5mm plug using the base as ground and the ring as serial input. The tip is not used.for the connection. Not sure about Cobb ,but if you have and ADC available with Accesport,you can run the 0-5v (white) to Pin 8 of the OBDII and then configure it with an ID and scaling.

Last edited by iceberg; Jul 27, 2020 at 02:21 PM. Reason: more info
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Old Jul 28, 2020 | 05:45 AM
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Originally Posted by iceberg
Does it not have the 0-5v and serial output wires on one of the harnesses? My 4110 does. From what I understand is the serial wire can be pinned to work with the Tactrix (stand-alone) only logger via a 2.5mm plug using the base as ground and the ring as serial input. The tip is not used.for the connection. Not sure about Cobb ,but if you have and ADC available with Accesport,you can run the 0-5v (white) to Pin 8 of the OBDII and then configure it with an ID and scaling.
hey thanks for ur reply. I actually FINALLY got this to work. I had to call AEM, who were very helpful, and got it all sorted.

Just for anyone else who runs into this problem. I kept getting referred to the write up by Brewed motorsports for this set up.
As it turned out, the pins in my rear O2 connector were not in the same locations, nor were they the same wire colors. I also pulled my own wiring diagram from alldata, and my car was different than that too.
On top of that being different. In addition to the white wire, I also had to ground an another wire from the guage/controller harness for it to read properly on the accesport.

Thanks for the help from anyone that posted here. Cars getting tuned tomorrow!!
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Old Jul 29, 2020 | 09:06 AM
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Good to hear you got it sorted out.

FYI, yesterday I wired my analog (0-5v) white wire of the 4110 into Pin 8 of the OBDII connector. I use Tactrix, so I just had to set that pin as an ADC and scale the voltage. It works great.
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