Wideband for logging in rear o2 position

[Agent_D]

I'm in the middle of getting some tuning done and I need to get a reading through the stock rear o2 sensor plug for ECUTek logging. I have a Zeitronix ZT-3 wideband setup plugged into the rear bung and I'm wondering if anyone can give me a bit of info. Running a catless header, and the tuner already set the rear o2 for logging the wideband.

If I'm looking at things correctly, I should be able to get separate power to the ZT-3 from +12v and a ground. The white wire on the data logger will send a wideband signal out. If I connected this white wire to the input for the stock rear o2, would this give me the readings I need for logging? I feel like it should work, but I'm not experienced enough with these things to know for sure.

Any information is extremely appreciated.

TIA!

[Agent_D]

Spent quite a bit of time with electric diagrams yesterday.

I'm using a Zeitronix ZT-3 wideband with just the data logger portion. It has a 6 prong plug that the wideband plugs into, a data logging rj11 port anda a plug that includes 4 wires, red/black/white/purple. Red = 12v, Black = ground, White = wideband signal out, Purple = programmable simulated narrowband out.

For anyone that needs this information in the future: (Note 1: This is on a 2013 BRZ Limited, wire color(s) may differ on FRS/86 or newer models) (Note 2: I am not installing this as a permanent fixture, so I did a temporary wiring solution)
I installed the wideband in the rear o2 sensor position on my catless header and the tuner set up the ECUTek custom map for logging from that sensor. I plugged in the Zeitronix wideband cable and ran it into the cabin through the firewall and plugged that into the proper 6 pin port for the wideband. I took the 4 prong harness that came with it, hooked up the red to a connector a quick connect that I use the positive battery terminal for power, hooked black to a chassis ground. The important wire for logging to ECUTek is the WHITE wideband out wire. Since this was being used to log the rear o2, and needed to be read by the ECUTek logging capability, it had to be connected to the rear o2 plug on the wiring harness to get that input to read. The wire on the rear o2 plug that receives this information is the bottom left as you are looking at the open face of the plug or the BLUE wire on that plug; once that was plugged in it read the wideband data through the custom mapped logging parameter as intended.

Please make sure you read the notes I posted. I was unable to find this information anywhere, so I felt like I'd post my experience to try and help someone in the future. Always make sure that you do some research before blindly following directions, as things can differ from car to car, year to year, model to model.

[steve99]

The other option is to just resacle the front 02 sensor its makes a pretty reasnoble wideband and can read well down to about 10 afr.

then you always have that reading available in logs and dont need to wire in special input/custom maps.

The 2017 ecu calibration does this

for older calibrations
http://www.ft86club.com/forums/showthread.php?t=82875

[BuffDriver]

@steve99

Was talking to a guy at the track today and he has a catless header and he was wanting to weld bungs on either side of the midpipe cat and relocate / extend the O2 sensor wires. I would think this would work? Yes/No

I told him I would check n get back to him.

I wonder if anyone makes an extension jumper with the right male n female plugs for this?

[steve99]

Originally Posted by BuffDriver

@steve99

Was talking to a guy at the track today and he has a catless header and he was wanting to weld bungs on either side of the midpipe cat and relocate / extend the O2 sensor wires. I would think this would work? Yes/No

I told him I would check n get back to him.

I wonder if anyone makes an extension jumper with the right male n female plugs for this?

Is he trying to stop cel code P0420 or put in a wideband ?


Easiest option will be to get a tactrix and disable P0420 and/or rescale the stock o2 sensor and flash a tune to car at same time.

[BuffDriver]

Actually I think his car is all stock except for the header and he just said he wanted to have the O2 sensors work for his remaining cat. {looked all stock when his hood was open to cool everything down}

He did not mention any code problems. I think he just wants it to 'work' / be monitored because right now there is nothing hooked up.

I however will be installing the new header n Phantom SC soon and will have to be using the O2 for that but the stock one should be within range as you told me earlier.

[churchx]

BuffDriver: Apexi cylinderback exhaust sys has such sensor relocation extender harness. No clue where to get it separately. But still, imho it makes little sense to stay on stock tune, and if it's customised ecu tune, then much simpler to disable P0420 in tune.

[BuffDriver]

Yah, I told him he needed a tune but he does not want to... told him the header was not going to give him much with a stock tune but he just not think that was right, to him it would. I will pass on the extender info, thanks

[gishpatrick]

Did you figure this out? I'm looking to do the same thing ):

I found this thread, but many of the images are gone. Maybe you will make more sense of it than me.

http://www.ft86club.com/forums/showthread.php?t=57902