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O2 sensor wiring at C212 connector

 
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Old 10-14-2014, 03:04 PM
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O2 sensor wiring at C212 connector

Please help.



In this picture is C212 (is this C212) connector at sub frame at passenger side in Honda Prelude 1998, BB9, F20A4.

Can somebody to tell me - which 4 wires is for front O2 sensor? BB9 have only one O2 sensor, at exhaust header (4-1).

Connector have 8 pines, but only 7 pines are useable.

If you can see, white wire have red dot - this is signal from O2. I have tested other wires from O2 sensor to found wires on C212 connector, but I have found only one wire from heater of O2 sensor.

Other 2 wires from O2 sensor - O2 ground and second heater wire - is somewhere merged together.

So,

O2 sensor have 4 wires - O2 impulse, O2 ground, and two wires for heater.

C212 connector at top side have 4 wire, yellow-white/black-white-brown/black.

I found:

O2 impulse - white
One wire heater - brown/black
One wire heater+O2 ground - white/black.

Can this be true, that this two wires is merged?

I have this problem because somebody put O2 sensor before catalytic converter, and put wires from C212 connector to down to cat. (swap engine)

I broked O2 sensor, and now I put new sensor to exhaust header, where O2 sensor must be on this engine. But now is problem to connect O2 sensor to his connector, because connector is at catalytic converter. I want to cut connector and re-wiring wires to C212 connector.

Long story, I'm bad at English, just want help. Maybe somebody know's which wire goes to which places.

Last edited by Tomina; 10-18-2014 at 03:05 PM.
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Old 10-16-2014, 03:00 PM
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Re: O2 sensor wiring at C212 connector

I'll look in my electric troubleshoot manual when I get home.

In the meantime the service manual should help ya.
All Gen. Prelude Service Manuals
^^ either chapter 23 or 11 is a good place to begin.

Edit:
These are how the bb6 are wired...hope it helps ya.











Each has a connector with four pins.

I didn't see C212 mentioned anywhere in the electrical book. That must be one of those connectors us Americans ask each other "what the hell does that go too?"
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Last edited by bykfixer; 10-16-2014 at 06:18 PM.
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Old 10-18-2014, 02:59 PM
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Re: O2 sensor wiring at C212 connector

thanks a lot man, I think this will help my :)
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Old 10-18-2014, 07:15 PM
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Re: O2 sensor wiring at C212 connector

Cool!!!
Don't forget to have your wires above the heat shield. As in between the car and heat shield. Not between the heat shield and exhaust pipe.
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Originally Posted by ogsmakdade View Post
welcome to site Carl
...is a golden car fax kinda like a golden ticket? Sure hope willy wonka didn't put any snozberries in your motor.
Quote:
Originally Posted by elspectro29 View Post
Only seen the first one, 15 years ago in theaters. Plan on keeping it that way. Get off my lawn.
Quote:
Originally Posted by Lindso View Post
I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

God's Not Dead
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Old 10-20-2014, 04:24 AM
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Re: O2 sensor wiring at C212 connector

My car is BB9, but harness is same like BB6. I have only primary oxygen sensor.



Ok, o2 sensor is conected on C118 connector (o2 connector), and then harness goes to C143/C282 connector.

C282 side goes to ECU.

C143 side is harnes to O2 sensor.

In this picture shows that white and black/white wire from sensor goes to C143.
But other 2 wires from O2 sensor goes to something like "A" and "B".

What is A and B?? This is also on yours picture from manual.

Your manual is not same like this on link.

Do you have scaned 23-5 page from manual? Because there is that A and B.

Last edited by Tomina; 10-20-2014 at 04:27 AM.
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Old 10-20-2014, 09:04 PM
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Re: O2 sensor wiring at C212 connector

I'm using the 97/98 electrical troubleshoot manual to get these pix.

Best I can tell a & b are merged.












^^ 23-4&5
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Originally Posted by ogsmakdade View Post
welcome to site Carl
...is a golden car fax kinda like a golden ticket? Sure hope willy wonka didn't put any snozberries in your motor.
Quote:
Originally Posted by elspectro29 View Post
Only seen the first one, 15 years ago in theaters. Plan on keeping it that way. Get off my lawn.
Quote:
Originally Posted by Lindso View Post
I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

God's Not Dead

Last edited by bykfixer; 10-20-2014 at 09:08 PM.
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Old 10-21-2014, 01:44 AM
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Re: O2 sensor wiring at C212 connector

Uhh, maybe it is not a same harness from BB6 and BB9.

Because my C143/C282 connector is on my first picture. (if is it a this connector, I really don't know now :( )

Connector have 8 pin's, but only 7 pin's have wire, 1 pin is uselles.

But if A&B is merged, and it is ground - so in teory 2 wires from O2 sensor is merged, ground from O2 sensor and one wire from heater.

Third wire is O2 signal, and fourth wire is heater controll.

When I test a wires from O2 sensor to connector on my first picture - 2 wires from O2 sensor (ground and heater) is merged.

Ufff....
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Old 10-21-2014, 01:47 AM
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Re: O2 sensor wiring at C212 connector

I founded this manual online, i will downloaded it and try to find a problem.
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Old 10-21-2014, 09:05 AM
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Re: O2 sensor wiring at C212 connector

Ok, I found everything in electric manual ;)

So, from O2 sensor, we have 4 wires which goes to first connector C118. This is O2 connector, 4 pin, which comes when you buy O2 sensor - of course :) Color can be varius, depending on the manufacturer.

So, from C118, 2 wires go to C143 connector (right side of engine compartment, A/T Prelude have 14 pin, M/T Prelude have 8 pin like my).

White wire is O2 signal, and this is pin number 3 on C143.
Blc/wht wire is heater control and this is pin number 2 on C143.

This wires goes from C143 to ECM (pin number 3 to D7 on ECM; pin number 2 to A6 on ECM).
And this is story ends for two wires.

Rest two wires from O2 sensor is:

O2 ground - grn/blk
Heater ground - blk/yel

Grn/blk O2 ground wire goes to C117 junction connector (right of oil filter), 14 pin. Terminals 8-14.
C117 junction connector, terminals 8-14 goes to C140 connector, terminal 4, and from terminal 4 goes to ECM, terminal D11. Story end!

Blk/yel O2 groung wire goes to C117 junction connector (right of oil filter), 14 pin. Terminals 1-7.
C117 junction connector, terminals 1-7 goes to C454, terminal 10, and then goes to Fuse 14.! Story end!

Looks like ECM controls o2 heater from - (minus) pole, plus pole from heater is at fuse 14.

Now I will test what is mistake at my car, somebody have done wrong wiring O2.

Uh, realy heavy problem :)
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Old 10-21-2014, 09:14 AM
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Re: O2 sensor wiring at C212 connector

Sounds like you are well on your way to achieving your goal of having 2 o2 sensors.
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Quote:
Originally Posted by ogsmakdade View Post
welcome to site Carl
...is a golden car fax kinda like a golden ticket? Sure hope willy wonka didn't put any snozberries in your motor.
Quote:
Originally Posted by elspectro29 View Post
Only seen the first one, 15 years ago in theaters. Plan on keeping it that way. Get off my lawn.
Quote:
Originally Posted by Lindso View Post
I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

God's Not Dead
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