Jump to content
SAU Community

Recommended Posts

I have an O2 Sensor from a RB30, and there are 3 wires... here is the problem :

What are the wires for?

1x Yellow Wire

1x Black Wire

1x Red Wire

Black and red and not power wires are they... this is standard + / - stuff, but I wouldn't think that the sensor would require external power?

Is the Yellow wire the signal wire, and the other 2 heater wires?

What is the Yellow Wire for... any help would be V. handy !

Thanks guys... I await speedy reply's

Link to comment
https://www.sau.com.au/forums/topic/26467-o2-sensor-help/
Share on other sites

1) Get a multi meter

2) When you cross 2 of the wires you should get a reading of 10ohm or less... these are the heater wires

3) When you cross the 3rd wire with anything else... it should read 'open circuit'... this 3rd wire is the signal / sensor wire !

just F.Y.I ... Thanks Bozz !

Link to comment
https://www.sau.com.au/forums/topic/26467-o2-sensor-help/#findComment-560007
Share on other sites

red is power for the internal heater

black is ground (other end of heater)

yellow is interesting. aftermarket? the ones i've seen are white but would be the actual probe which returns 0-1v depending how much exhaust gas is passing past.

note that O2 sensors are matched to different ECUs and the stoich curves may be different (ie an RB30 O2 may have a more narrow curve than the RB25 ECU is programmed for)

Link to comment
https://www.sau.com.au/forums/topic/26467-o2-sensor-help/#findComment-560405
Share on other sites

I have the ca18det and the plug goes. black white red (left to right) on the other side of the plug the black goes to a blue, white to grey and the red goes to a grey with a white trace.

So what im trying to figure out is which one is the signal. the instructions say that its not polairty dependant for the heater wires. the replacement has 2 black and 1 blue. (universal 3 wire)

Link to comment
https://www.sau.com.au/forums/topic/26467-o2-sensor-help/#findComment-560492
Share on other sites

If you want to know the difference between the different types of O2 sensors, try this link: (about half way down the page)

http://www.ngkspark.com.au/tech_info_oxyge...nsors_index.htm

Also, the current NGK Spark plug & O2 sensor catalogue has detailed information on these including pics of the different plugs - great for matching up an alternative to that expensive OE Nissan sensor!

Link to comment
https://www.sau.com.au/forums/topic/26467-o2-sensor-help/#findComment-560617
Share on other sites

Originally posted by phorj

1) Get a multi meter

2) When you cross 2 of the wires you should get a reading of 10ohm or less... these are the heater wires

3) When you cross the 3rd wire with anything else... it should read 'open circuit'... this 3rd wire is the signal / sensor wire !

just F.Y.I ... Thanks Bozz !

Should'a just called me to begin with :rofl:

BTW can I borrow your car for a few hours one of these days, need to swap bits to find a fault...

:(

Link to comment
https://www.sau.com.au/forums/topic/26467-o2-sensor-help/#findComment-569116
Share on other sites

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

    • Have a look at that (shitty) pic I posted. You can see AN -4 braided line coming to a -4 to 1/8 BSPT adapter, into a 1/8 BSPT T piece. The Haltech pressure sender is screwed into the long arm of the sender and factory sender (pre your pic) into the T side. You can also see the cable tie holding the whole contraption in place. Is it better than mounting the sender direct to your engine fitting......yes because it removes that vibration as the engine revs out 50 times every lap and that factory sender is pretty big. Is it necessary for you......well I've got no idea, I just don't like something important failing twice so over-engineer it to the moon!
    • Yup. You can get creative and make a sort of "bracket" with cable ties. Put 2 around the sender with a third passing underneath them strapped down against the sender. Then that third one is able to be passed through some hole at right angles to the orientation of the sender. Or some variation on the theme. Yes.... ummm, with caveats? I mean, the sender is BSP and you would likely have AN stuff on the hose, so yes, there would be the adapter you mention. But the block end will either be 1/8 NPT if that thread is still OK in there, or you can drill and tap it out to 1/4 BSP or NPT and use appropriate adapter there. As it stands, your mention of 1/8 BSPT male seems... wrong for the 1/8 NPT female it has to go into. The hose will be better, because even with the bush, the mass of the sender will be "hanging" off a hard threaded connection and will add some stress/strain to that. It might fail in the future. The hose eliminates almost all such risk - but adds in several more threaded connections to leak from! It really should be tapered, but it looks very long in that photo with no taper visible. If you have it in hand you should be able to see if it tapered or not. There technically is no possibility of a mechanical seal with a parallel male in a parallel female, so it is hard to believe that it is parallel male, but weirder things have happened. Maybe it's meant to seat on some surface when screwed in on the original installation? Anyway, at that thread size, parallel in parallel, with tape and goop, will seal just fine.
    • How do you propose I cable tie this: To something securely? Is it really just a case of finding a couple of holes and ziptying it there so it never goes flying or starts dangling around, more or less? Then run a 1/8 BSP Female to [hose adapter of choice?/AN?] and then the opposing fitting at the bush-into-oil-block end? being the hose-into-realistically likely a 1/8 BSPT male) Is this going to provide any real benefit over using a stainless/steel 1/4 to 1/8 BSPT reducing bush? I am making the assumption the OEM sender is BSPT not BSPP/BSP
    • I fashioned a ramp out of a couple of pieces of 140x35 lumber, to get the bumper up slightly, and then one of these is what I use
    • I wouldn't worry about dissimilar metal corrosion, should you just buy/make a steel replacement. There will be thread tape and sealant compound between the metals. The few little spots where they touch each other will be deep inside the joint, unable to get wet. And the alloy block is much much larger than a small steel fitting, so there is plenty of "sacrificial" capacity there. Any bush you put in there will be dissimilar anyway. Either steel or brass. Maybe stainless. All of them are different to the other parts in the chain. But what I said above still applies.
×
×
  • Create New...