I need to know which pins on the ECU correspond to the secondary (after catalytic converter) o2 sensor.

This is for a 96-98 OBD2a Civic EX

A diagram would be most appreciated.

 

no diagram, but there are the O2 wires and where they go.

O2 wire color(harness wire color) - end location
white(white/red) - D14
black(black/white or black/yellow) - 12V ignition
green(green/white) - D13
black(black/white) - A5

 

And this is for the after cat sensor, not the one in the header, right?

 

yes

the harness wire colors will tell you if it's correct.

 

http://www.ek9.org/forum/attac...s.gif


CHA CHING!!!!

 

cool, thans.
both of these should help.

the only thing, in the diagram, it mentions VX a few times, which was only produced as OBD1 model. Will this still work for OBD2 EX?

looks like the diagram is for OBD1...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ifIexplode &raquo;</TD></TR><TR><TD CLASS="quote">http://www.ek9.org/forum/attac...s.gif


CHA CHING!!!!</TD></TR></TABLE>
that's for OBD1.

OBD2a - http://www.b18c5eg.com/obd2a.jpg

 

I think this is actually what I was looking for...



Now I just have to track down all the wires




Modified by d16rice at 5:43 PM 4/18/2008

 

^^^ better

 

ahh. I read it wrong, 12 hour days do have an effect on me. sorry.

 

it's all good.
I appreciate any and all help I can get.

Looks like I found most of the wires...

Secondary

D13 – SHO2/SG
Secondary Heated o2, Sensor ground
Wire color: red/yellow (d16y7)
Wire color: green/black (d16y8)

D14 – SHO2S
Secondary Heated o2, Sensor-2
Wire color: white/red

A5 – S02SHTC
Second o2 Sensor Heater Control
Wire color: black/white

Just one left, I think it might be D11, but I'm not sure.
I know you said it goes to 12V ignition, but if possible, I'd juch rather hook it up to the ECU than to something else.


Modified by d16rice at 5:53 PM 4/18/2008

 

any more input?
Just want to make sure I get it right

 

either of the IGPs will work. A11 or A24

 

Ok, I'll be wiring it in tomorrow... I hope it works

 

SUCCESS!!!!!!!!!!!!!

I finished rewiring it.
After sitting in the garage for 18months, having a 5-spd conversion, vtec conversion and a bunch of others stuff done to it, it fired up on the first try!!!!

No check engine lights yet or anything

I just have to get used to the light weight flywheel, short shifter and stiff engine mounts.