Which ECU wires to connect wideband O2

[jbbauer]

I'm going to tune my car with an LM-1 wideband from Innovate Technologies and Hondata's Romulator and Romeditor.

I believe I'm supposed to wire in my wideband LM-1 outputs (3 wires) in place of the origonal primary O2 wires. Which wires (2 wires?) on my origonal harness are these. Color and pin numbers would be helpfull.

Can exhaust heat damage the unconnected narrow band O2 sensor?

I'd like to install a switch in the wiring that allows me to switch between wideband and narrowband. Any issues doing it this way?



THANKS FOR THE HELP

Car Facts:
Honda Civic SI 2000
JRSC 8.5lb pulley
RC440
Hondata S200 w/ RomEditor version 3.5.1.0
P28 ECU w/ OBD1 to OBD11 harness adapter

[turbosi92]

I'm going to tune my car with an LM-1 wideband from Innovate Technologies and Hondata's Romulator and Romeditor.

I believe I'm supposed to wire in my wideband LM-1 outputs (3 wires) in place of the origonal primary O2 wires. Which wires (2 wires?) on my origonal harness are these. Color and pin numbers would be helpfull.

Can exhaust heat damage the unconnected narrow band O2 sensor?

I'd like to install a switch in the wiring that allows me to switch between wideband and narrowband. Any issues doing it this way?



THANKS FOR THE HELP

Car Facts:
Honda Civic SI 2000
JRSC 8.5lb pulley
RC440
Hondata S200 w/ RomEditor version 3.5.1.0
P28 ECU w/ OBD1 to OBD11 harness adapter

First off, you won't hurt the stock O2 by leaving it in and not using it.

Second, you need to read this to get an Idea on how to hook it to the hondata. Next, you would need to find out which wires are what on your wideband and hook them to the Hondata (Stock O2 harness or wire them directly to the ECU harness).

http://www.hondata.com/techwidebandtuning.html

[jbbauer]

Thanks, but what wires in the origonal ECU harness are the O2 wires? Color / pin numbers?

[turbosi92]

Thanks, but what wires in the origonal ECU harness are the O2 wires? Color / pin numbers?

Here are the OBD1 wiring diagrams.
http://www.hondata.com/techwiringgsr.html

There are others out there on the net. Just do a search on Google. I can't remember off the top of my head.

[jbbauer]

that was for a 92-95 GSR, I have a 2000 Civic SI

I'll search google as well but if anyone knows off hand please let me know.. thanks

[DaX]

I could tell you pinouts for a 4 wire OBD-1...but I have no clue for an OBD-II car...perhaps look on http://www.honda-tech.com

[pills_PMD]

i think www.hondaswap.com has obd2 pinouts in the article section.

[turbosi92]

I could tell you pinouts for a 4 wire OBD-1...but I have no clue for an OBD-II car...perhaps look on http://www.honda-tech.com

I'm with him. I only know OBD1 as well.

[jag]

You can just get a NB o2 sensor connector (i just replaced my sensor and used the connector from the old one). Then when you are using the wideband you just unplug the narrowband and plug the wideband setup in in it's place.

-Jeremy

[jbbauer]

Hondata please help,

I was told on another forumn (honda-tech) that C15 and C17 are the O2 sensor wires in the orig OBD2 harness. This is the blue connector. C15 grn/blk and C17 wht. I measured about 0.9V across these wires at idle which is in the range of stock O2 so I assumed the post was correct, can you confirm? I did try to search google for this info but no luck.

I then connected my LM-1 WB O2 output in place of these wires and configured the RomEditor Lambda/Voltage conversion table to match the LM-1 output and downloaded the entire ROM to the ROMulator. At this point my car wouldn't start and the HondataLogger would not connect. What am I doing wrong or what else can I try?

Does the Lambda/Voltage conversion table get dowloaded to the S200?

[jbbauer]

Also .. Do I need to "Save as Base" .. or .. "Reboot ECU" after downloading entire ROM?

[turbosi92]

Hondata please help,

I was told on another forumn (honda-tech) that C15 and C17 are the O2 sensor wires in the orig OBD2 harness. This is the blue connector. C15 grn/blk and C17 wht. I measured about 0.9V across these wires at idle which is in the range of stock O2 so I assumed the post was correct, can you confirm? I did try to search google for this info but no luck.

I then connected my LM-1 WB O2 output in place of these wires and configured the RomEditor Lambda/Voltage conversion table to match the LM-1 output and downloaded the entire ROM to the ROMulator. At this point my car wouldn't start and the HondataLogger would not connect. What am I doing wrong or what else can I try?

Does the Lambda/Voltage conversion table get dowloaded to the S200?

If you download the ROM to the ECU, you must shut the ignition off then turn it back on. This allows the new ROM you just downloaded to be read.

See here. http://www.hondata.com/downloads/Romula ... ctions.doc

[jbbauer]

If you download the ROM to the ECU, you must shut the ignition off then turn it back on. This allows the new ROM you just downloaded to be read.

See here. http://www.hondata.com/downloads/Romula ... ctions.doc

Thanks turbosi92,
I'll try this.

Do you know if the Volt/AFR converstion table gets downloaded into the ROM? I think my car is not starting because the Wideband Voltage input is so far off from the narrowband voltage, and the ECU is not compensating for this with the coversion chart.

[jag]

Thanks turbosi92,
I'll try this.

Do you know if the Volt/AFR converstion table gets downloaded into the ROM? I think my car is not starting because the Wideband Voltage input is so far off from the narrowband voltage, and the ECU is not compensating for this with the coversion chart.

The ECU won't run in closed loop off of the wideband. The table is only for when you are datalogging with the rom editor (or logger). I usually turn off closed loop control when I am tuning with a wideband.

-Jeremy

[jbbauer]

thanks jag, that makes sense

Are there any issues using the emulator in place of the EPROM (closed loop, no laptop). I'm currently doing this until I get around to tuning it. HOWEVER, three times now my car has died and CEL'd on me with the emulator in place of the EPROM. I can restart it and it will run for a while. Should I go back to the EPROM or is there some other problem

BTW I will check error codes, if any, tonight and post.