A/F Ratio install help ??? - Toyota Nation Forum : Toyota Car and Truck Forums

camrygt97 · 06-23-2003, 05:51 AM

How to install A/F Ratio for 97 camry got everything connected just can't find the rite o2 wire cause there is 4 of them

high c · 06-24-2003, 09:01 PM

ya, you got a heated o2. you should be able to chech the wires with a volt meeter
one wire is the power to heat it up (probly 12v, chech when first start up)
other wire ground
other wire o2 sensor out put (when the car is warmed up you should be able to find this wire with a volt meter, you will know if it the one by the volted changing at idle and when you give it gas/ the forth wire I am not shour about
sorry about spelling

BILLSHEA99 · 03-18-2004, 12:20 PM

can you be a little bit more specific with the info?

I ran into the same problem as camrygt97 with not being able to fugure out which on the 4 wires it might be,
so any pics would help a lot,

some people told me it would be better to run it from the ECU but the O2 sensor at the header is good enough for me!

***zoni*** · 03-18-2004, 06:03 PM

which o2 sensor are you working off of? 4cyl or v6 top o2 sensor or sub oxygen sensor, if there is one in the 4cyl... i dunno... let me know and i will look it up if i can...

BILLSHEA99 · 03-19-2004, 12:29 AM

i have the 4cyl camry, workin off the O2 sensor on the header where there's 1-blue wire 1- white wire 2-black ones then those lead up to another four near the engine hook on the block
1 green 1 orange 1 yellow 1 black
so confused on which one to tap for the AF to work.

any help would be much appreciated

Nick · 03-19-2004, 12:59 AM

from what i got in the haynes manual, the signal for the ecu is from the white wire on the main sensor

or the red and blue on the sub

***zoni*** · 03-19-2004, 01:23 AM

^ exactly right... nice job oldman

Nick · 03-19-2004, 01:24 AM

i'm super

BILLSHEA99 · 03-19-2004, 10:28 AM

Thanks a lot Oldman

i'll give that a try this weekend, can't wait to put my gauges!!

BILLSHEA99 · 03-28-2004, 08:09 PM

Oldman

Quote:

from what i got in the haynes manual, the signal for the ecu is from the white wire on the main sensor

i know you pretty muched answered my question but

wat's:

the main sensor? and what's a sub?
or if you can gimme more detail on which wire to tap...
really wana get this A/F in...

Nick · 03-28-2004, 08:13 PM

i don't know, you'd have to take a look at the wires coming out of each of the 02 sensors

Deep · 03-28-2004, 08:45 PM

Quote:

Originally posted by BILLSHEA99
Oldman i know you pretty muched answered my question but wat's:

the main sensor? and what's a sub?
or if you can gimme more detail on which wire to tap...
really wana get this A/F in...

The main sensor would be the one in the exhaust manifold, the sub is a little downstream. I'd use the primary one in the manifold.

Instead of running a wire all the way from the sensor, you could just tap into it using a Scotch lock connector under the dash where the wire meets the ecu. From Oldman and Zoni, it seems like you'd wanna tap the white wire.

BILLSHEA99 · 03-28-2004, 08:54 PM

which white wire??? is that the only white wire on the ECU??
Deep if you can .. please copy or scan the ECU map for me.. so i can see wat it is i need to tap

Deep · 03-29-2004, 06:43 AM

I don't have it, but Zoni has the BGB.

***zoni*** · 03-29-2004, 02:53 PM

Deep, I'll give you a BGB!!! haha, wtf is a BGB?

Here is a pic of the plug that you need to get the wire from... its the white wire, PIN 6 on the B connector to the ECU.
This is what the plug looks like... and it is as if you are looking at the plug where it plugs into the ecu. Its the one on the left in the pic, E12, B