Jump to content
SAU Community

Recommended Posts

Hi,

R33 GTS-T 1995

Which is the signal wire on the ECU side of the o2 sensor ?? Either at the O2 sensor (after the plug/converter) OR pinout at the ECU ???

Am installing a ricey A/F ratio guage and need to tap into the OS sensor signal wire.

Thanks in advance !

Link to comment
https://www.sau.com.au/forums/topic/5351-o2-sensor-signal-wire-r33/
Share on other sites

Attached is a ECU wiring diagram for R33 from S-AFC manual. Hope it's clear enough for you. Just be careful and count the right wires on your ECU.

BTW. What brand of A/F meter you're installing? What's it look like, cool gauges? Is it pretty accurate? I found the one on Apexi TT was not accurate.

Thanks !!

It's an Autometer (doesn't display actual ratios - but ranges - ie lean , rich, stoich). I too have heard that they are inaccurate - May be the O2 sensor tho - apparently there a a couple of types- one being more accurate than the other.

When I get it on, I'll compare to the lambda?? probe they shove up the zorst when it is on the dyno.

Cheers,

BTW - looks like pin 29 on the ECU connector OR the Centre (clear) cable off the O2 sensor itself is the signal cable.

Can anyone confirm ??

Yep, compare it and let us know what you find.

The A/F meter just reads voltage ranges. There was an article on autospeed about it when they built the jaycar kit.

To work out which wire is the signal wire on the O2 sensor I've been told you use a digital (not analogue) multimeter on the wire and whichever wire fluctuates is the wire you need to connect it to.

The S-AFC instructions list the air flow signal pin in drawing N-4A for an R33 with RB25DET made before 96. It does not list a pin number though.

S-AFC wiring diagram can be found at:

http://www.apexi-usa.com/productdocumentat...s_safc_wire.pdf

i think your ion ofr a bit of an expensive mistake, thats if your A/F meter cost much....

Most oxygen sensors put out around .2 to .8 of a volt, depending on if its running rich or lean.

From what i can see, and i tested this on an oscilliscope, the oxygen sensor on my r33 switches from 0 to battery voltage, around 14 volts. It has 3 wires, an earth, a voltage supply and a signal wire.

i would check this out before i wired the A/F meter up.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • I would paint match the whole thing to avoid unwanted attention  I had a similar bonnet, paint matched, on my old R33 GTST, but mine was a fibreglass jobbie made by Blitz in QLD, they work extremely well for radiator efficiency and under bonnet temps
    • Does anyone run this kit with factory plenum? Does the adapter and bosch tb fit under factory strut brace? I wanted to get this setup before going forward facing manifold. Thanks
    • small update time, after always wanting a "cool" looking bonnet for my car and always struggling to find one for the series 2 that i liked and wasn't an insane amount of money. Saw one i liked on RHDjapan from D-speed in Japan the price was very good for a carbon bonnet so good infact i was a little unsure how much i trusted it, decided to bite the bullet and with the help of jesse streeter in not long at all it was at my door. Once it was delivered i ran in from work and quickly unboxed it and to my surprise the quality was actually pretty good i quickly removed the old bonnet and placed on the new one to test it out and even the fitment wasnt too bad at all. Then decided to paint the little grille in the bonnet black to stop it sticking out so much.   I decided to not mess around with the hood latch and just install some aero catch hood pins, having never installed them before did some YouTube university classes and i was good to go. fair to say it is not a fun job at all from making brackets so the pins sit nicely and actually cutting through the bonnet but also being very scared of cutting the holes too big it took wayyyy longer than i would like to admit but finally got it there. Then it was time for a quick test drive to ensure the latches actually worked and thankfully the bonnet looked very stable. I still think paint matching the bonnet and leaving just the part that sticks up as carbon would help make it all look alot neater as im not sure how i feel about all that carbon on a very fridge white car but will leave it as is and see how i feel with time.  
    • I think it's bound to happen, you finally get it all perfect, and bam, something will happen. I took a while to get a Commodore rear quarter repaired where a P Plater clipped it. Two days after getting it back, Sarah wiped it out on a concrete pillar in an underground car park... This is why I take forever to repair them, it stretches how long until it gets bent again... 😛
    • Nah, not really responsible for that little fiasco, but I'm still pissed at myself for writing off my 86, or when I reversed my VX into a pole just before selling it, but, meh, 5hit happens to stuff, all it takes is a slight distraction, and life is full of distractions, and "dooh" moments   
×
×
  • Create New...