jbbauer7

Which ECU wires to connect wideband O2

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

Chiovnidca

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jbbauer7 &raquo;</TD></TR><TR><TD CLASS="quote">Can exhaust heat damage the unconnected narrow band O2 sensor?


</TD></TR></TABLE>
Yes, don't run the engine without the wideband o2 heater powered up. It will screw up it's readings real fast.

jbbauer7

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chiovnidca &raquo;</TD></TR><TR><TD CLASS="quote">
Yes, don't run the engine without the wideband o2 heater powered up. It will screw up it's readings real fast.</TD></TR></TABLE>

Actually I'm asking about the origonal narrow band O2 sensor.. can an unconnected origonal O2 sensor left in the exhaust bung be damaged by the heat.

jbbauer7

anyone know what color wires are the primary O2 wires in the 2000 Civic SI ECU harness?

Chiovnidca

sensor ground pin c18 grn or grn/blk
input pin c16 wht

jbbauer7

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chiovnidca &raquo;</TD></TR><TR><TD CLASS="quote">sensor ground pin c18 grn or grn/blk
input pin c16 wht</TD></TR></TABLE>

I'm assuming the blue 31pin connector is Connector "C"?

Thanks, I think I found these wires. However the numbers were one off:
C15 is grn/blk and c17 is wht. Are these the O2's?

Thanks again

Chiovnidca

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jbbauer7 &raquo;</TD></TR><TR><TD CLASS="quote">

I'm assuming the blue 31pin connector is Connector "C"?

Thanks, I think I found these wires. However the numbers were one off:
C15 is grn/blk and c17 is wht. Are these the O2's?

Thanks again</TD></TR></TABLE>
Yea, those are them. Your just counting the wrong way. It helps when you have a schematic to look at.

jbbauer7

thanks Chiovnidca, I'm on it .. I'd be wide band tuning tomorrow if it wasn't for the snow storm (Denver)

jbbauer7

Hondata or wiring Help!

I measured about 0.9V across the grn/blk and white (mentioned above) at idle which is in the range of stock O2 so I assumed these were the O2 wires.

I then connected my LM-1 WideBand 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? (Logger and car work again after rewiring to orig)

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