Wideband ECMLink wiring help

[ErikTande]

http://www.plxdevices.com/support/manuals/SM-AFRGen2UsersGuide.pdf

My wideband has both 0-1v output and 0-5v output. Do I use one or both? I'm kind of confused there. And I assume I connect the wideband output to PIN 4 on my ECU via the white wire. Is that correct?

http://www.dsmlink.com/images/forums/1GECUPinout.pdf

Thanks!

 

[c2ypt1c]

the 1v signal is the wideband's internal narrowband simulation. However, ecmlink v3 can simulate narrowband using the 5v wideband signal. There are a couple different configurations, but the most common ways are to either:

- keep the factory fronto2 which is a narrowband signal(0-1v), install the wideband into a bung further down in the exhaust system, and wire the wideband (0-5v signal) to a separate input (like egr, pin 15 on 1g).
*OR*
- remove the factory fronto2, install wideband in fronto2 location, wire it (0-5v signal) to the fronto2 pin on the ecu (pin 4 on 1g), and simulate narrowband through Link.

either way, you're only dealing with the 5v signal.

I should also state that the narrowband signal, whether it's supplied by the factory o2 or simulated from the wideband, is used to control closedloop operation (idle/cruise), where the ecu uses this signal to adjust the amount of fuel being injected in order to maintain a stoichiometric air-fuel ratio (14.7:1 for gas).

 

[ErikTande]

OK, I think I got it. I installed my wideband 36 inches down from the turbo on my exhaust, so I will wire my 0-5v output to my EGR temp pin (number 15). Thanks! I'll do that tonight or tomorrow and mark this post resolved if it works.

 

[ErikTande]

Quick question, my boost gauge has a 0-5v out also, should I be wiring that into link as well?

 

[snowborder714]

What boost gauge do you have and why would you wire it into the ECU?

 

[ErikTande]

What boost gauge do you have and why would you wire it into the ECU?

A more accurate data log? I have no idea to be honest, I thought maybe ECMLink could use it. I guess not though. It's a PLX wideband / boost gauge.

I'm marking this thread solved, I have the wideband logging in ECMLink properly now, (wired into pin 15 (EGR Temp) thanks for the help!

 

[snowborder714]

The only true way to log boost is via a MAP sensor that plumbed right into the manifold's plenum. Anything else and you'll get a crappy resolution and/or delayed response.