S300, PLX M300 question

sm61 · Post by **sm61** » Tue Apr 29, 2008 7:28 pm

I am replacing the stock narrowband with a wideband. Have a obd2b socketed p28 with S300. Do I wire the white PLX M300 wire to the primary o2 sensor wire, ord to the ELD input wire? Thanks for any help.

gee031 · Post by **gee031** » Wed Apr 30, 2008 5:05 am

The grey wire will be the narrowband output, send this into the normal O2 input.

The white wire is the wideband output, wire that to the ELD or whichever input you want to use from the list in smanager

Dont forget to turn off the o2 heater.

hope that helps.

Post by **Spunkster** » Wed Apr 30, 2008 9:59 am

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

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

sm61 · Post by **sm61** » Thu May 01, 2008 3:52 pm

Ok thanks. What other input options in that list will I have? I dont have my laptop yet or I would look myself. Thanks.

MarkC · Post by **MarkC** » Wed May 07, 2008 7:24 pm

Is the "narrowband" output on the PLX a linear output? Can it be connected to the regular O2 sensor input on the ECu and still function as desired? But varying from 0-1v instead of 0-5v?

ITR 1102 · Post by **ITR 1102** » Wed May 07, 2008 10:15 pm

MarkC wrote:Is the "narrowband" output on the PLX a linear output? Can it be connected to the regular O2 sensor input on the ECu and still function as desired? But varying from 0-1v instead of 0-5v?

yes. just disable the o2 heater as stated above. Use the white wire going into the stock O2 input if you want to datalog while running in open loop, or wire in the gray wire to the stock O2 wire for narrowband. Read the install procedures on the link Spunkster provided as there are more options.
To view them all, download SManager and look at all the possible inputs for wideband signal.

Note: in my experience, I did not have to wire in the resistors that came with the PLX unit for the purpose of filtering. I don't know if anyone else has had issues with it or not.