TB123

I am working on wiring up my M300 wideband O2 sensor. After searching, I found that there seems to be many different ways to do this. I want to confirm that I have the right idea.

The Hondata website suggests wiring the red power wire into the fuse box and the black ground to a solid chassis ground. The PLX Devices website says to connect these wires (specifically the ground) as close to the ECU as possible to insure an accurate reading. I have also read a few threads where people suggest connecting these wires directly to the battery or into the ECU power source. What is the best way to wire the power and ground?

Hondata says that you can make an adapter for the grey narrowband output wire using the plug from an old OEM O2 sensor. They say that the reason for this is so that the ECU does not generate code 41. Instead of making an adapter, can I just disable the O2 heater using the Hondata software and then leave the grey wire unattached to anything? Do most people do this?

The PLX website also says that "noise filtering capacitors" must be used for the grey and white wires. The website says that the capacitors "filter out unwanted electrical noise produced from your vehicle’s ignition and other onboard systems. This provides added signal integrity for more accurate, reliable and consistent measurements." I have not heard about anyone using these capacitors. Do I need to add them?

Sorry for the long post, I am just unsure of how I am supposed to do this. Please help if you can.

civickiller

with the s300 and plx. i ground it right on the passenger side wall right by the ecu and get power from the fuse box. the white wire i tap into the stock o2 input. no capacitor. i dont have a problem with it

0mtber

iTrader: (2)

Just wire up your standard 12 volt switched ignition source to the wideband controller, ground it at the battery & run the 0-5 volt lamda output to an input such as ELD or an analog input (you must alter the ecu to use these methods). You can also disable the o2 heater & use the factory o2 input on the ecu.

TB123

Thanks for the replies. I still have a couple more questions. If I connect the white output wire to the ELD, what would I need to alter in the ecu? If I leave the gray narrowband wire disconnected and disable the O2 heater, will I get code 41? Will that be just as good as making an adapter, or are there benefits of making the adapter and leaving the heater enabled?

airwalk07143

i was trying to figure this same thing out the past couple weeks. we ended up just running the white wire to the eld(pin d10). unplugged the stock o2 sensor(happend to still be installed in dp). as far as the computer... we disabled the o2 heater. select the eld option. and played with the voltage offset. mine worked fine at -.36. No codes. hope this helps!

TB123

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by airwalk07143 &raquo;</TD></TR><TR><TD CLASS="quote">i was trying to figure this same thing out the past couple weeks. we ended up just running the white wire to the eld(pin d10). unplugged the stock o2 sensor(happend to still be installed in dp). as far as the computer... we disabled the o2 heater. select the eld option. and played with the voltage offset. mine worked fine at -.36. No codes. hope this helps! </TD></TR></TABLE>

So did you leave the gray wire disconnected?

BRN12345

My voltage offset was around -.36 before removing the resistors... i would recommened you cut the R136 and R138 resistors, once i cut those the offset was very close to 0. Also i did you the capacitors and have a resistor on the heater circuit for the origional O2 senor. Works great.. first time i use PLX and i am really impressed.

airwalk07143

yes i left the greywire undone. where r the resistors that u cut ?

BRN12345

Open up the ECU and look Honda labels all the components...

viskii420

I'm sorry if i jack thread but I'm the same boat.
Wanted to confirm my work so far.I cut the female plug and connected two black wires with resistor from the old O2 sensor. I tucked the green wire away.
The white wire is brought to cabin wich I'll connect to m300 grey wire.

Pics.



Any input?



Modified by viskii420 at 5:54 PM 9/1/2008

viskii420

After some reaserch i can confirm that the white wire is the right wire for narrow band signal.
diagram:




<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BRN12345 &raquo;</TD></TR><TR><TD CLASS="quote">My voltage offset was around -.36 before removing the resistors... i would recommened you cut the R136 and R138 resistors, once i cut those the offset was very close to 0. Also i did you the capacitors and have a resistor on the heater circuit for the origional O2 senor. Works great.. first time i use PLX and i am really impressed.</TD></TR></TABLE>

Sorry for being **** about this. I wanted to make this sh*t right.
Here is a pic of resistors. Just desolder them?




Modified by viskii420 at 7:01 PM 9/2/2008

0mtber

iTrader: (2)

Yes the white wire is the primary o2 narrowband.
You can use the ELD input for your 0-5 volt wideband lamda input. You will have to remove two resistors to get a proper signal per the hondata wideband instructions.

You can snip them out using a very small pair of cutters.

b16spaz

i did mine a using the ELD for wideband and wiring like plx said for power and ground and for the o2 heater i still have the stock 02 and plx in the dp so i just pulled the pins out of the connector in the stock primary signal and left the heater wires so it would still have the same resistances and i wouldent have to wire in resistors or anything and works fine. no codes w/ o2 heater enabled or disabled

blkb18

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mtber &raquo;</TD></TR><TR><TD CLASS="quote">Yes the white wire is the primary o2 narrowband.
You can use the ELD input for your 0-5 volt wideband lamda input. You will have to remove two resistors to get a proper signal per the hondata wideband instructions.

You can snip them out using a very small pair of cutters.</TD></TR></TABLE>On the hondata website it says "some ecu's require removal of the resistors". Are there certain ecu's that this needs to be done to? I am running a p28 with s300 and plx wideband. Also, does the ecu actually use the wideband signal, or is it just for the tuner to use? I am running the stock o2 sensor also. Vehicle runs great, no complaints, no cel. Thanks in advance.

sohctodohc

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blkb18 &raquo;</TD></TR><TR><TD CLASS="quote">On the hondata website it says "some ecu's require removal of the resistors". Are there certain ecu's that this needs to be done to? I am running a p28 with s300 and plx wideband. Also, does the ecu actually use the wideband signal, or is it just for the tuner to use? I am running the stock o2 sensor also. Vehicle runs great, no complaints, no cel. Thanks in advance. </TD></TR></TABLE>


i had the same question about a month ago. and from what i figured out, the resistors are only in usdm ecu's, the jdm ecu's dont have the resistors in them

viskii420

^^^ if resistors exists cut em?

sohctodohc

thats what it says to do right? some people do it and some people dont. its up to you

TB123

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by viskii420 &raquo;</TD></TR><TR><TD CLASS="quote">^^^ if resistors exists cut em?</TD></TR></TABLE>

I did not cut any resistors in my ecu.

whiteef8

question, would i get a reading through hondata using my stock sensor? i have a whole wideband setup w/ display box etc, and i might just use this, although it would be really nice to use my s300 to datalog A/f's

maybe i'll just man up and buy another sensor??

0mtber

iTrader: (2)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by whiteef8 &raquo;</TD></TR><TR><TD CLASS="quote">question, would i get a reading through hondata using my stock sensor? i have a whole wideband setup w/ display box etc, and i might just use this, although it would be really nice to use my s300 to datalog A/f's

maybe i'll just man up and buy another sensor??</TD></TR></TABLE>

You must run a 0-5 volt input from your wideband controller to the ecu on a supported input such as ELD. Read the smanager help file for more information.

portenio78

iTrader: (1)

Dont mean to thread jack but I want to try this from Hondata's site:

You can make an adapter (using the plug off a dead O2 sensor) that connects the 0-5V wideband output to the stock oxygen sensor plug. The adapter plug does two things. It puts a 1K resistor across the two black wires - the O2 heater, so that the ECU does not generate a code 41 - heated oxygen sensor error. Even if you do get this error the ECU functions normally.
The other two wires, typically green and white are ground and signal, only the signal wire (white) is used.

John(mtber) can you please break this down for me so I know where to exactly wire up my red, black, and white plx wires to an old plug. I wont be using the grey narrowband wire.

portenio78

iTrader: (1)

anyone?

viskii420

^^^ u just going to use the wideband?

portenio78

iTrader: (1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by viskii420 &raquo;</TD></TR><TR><TD CLASS="quote">^^^ u just going to use the wideband?</TD></TR></TABLE>

I want it to work with my s300

portenio78

iTrader: (1)

Doing some reading on using a dead 02 plug to make a harness...One of the two black wires is +12v and the other is a ground, then the white wire is the signal. Is this ok to wire it up this way? The green wire is also a ground, could this be substituted?


Modified by portenio78 at 10:59 AM 11/4/2008