I searched for a while and could not find the answer. Anyway I just purchased s300 and an aem wide band. the aem has 4 wires comin out of it, ground, power, sensor signal, and a blue one the says its ecu signal. What do i do with the blue one? Any help would be great! Thanks

Justin

 

since you listed a blue wire I'm guessing you have the 30-2300 not the 30-2301.

as it says in the instructions... http://www.aempower.com/images...r.pdf
(page 3)

black = ground
red = power
white = sensor #1 0-1V sensor signal
orange = sensor #1 0-5V signal
blue = sensor #2 0-5V sensor signal

if you're not using 2 O2 sensors connected to the unit then the blue wire should not be needed.

At least that's what the instructions say, there may some deviations in wire colors through the years that I don't' know about. I'm a PLX guy myself.


when I first read you're post my initial thought was this...
red = power
black = ground
sensor signal = 0-5V signal
blue = 0-1V signal
but again that's not what the instructions on AEM's site says.

 

Its a 30-4100 and its got
red power
black ground
white output 0-5v
blue serial
I did some more lookin around and i guess its the white on that I need the wire into the ecu or harness some how. The instructions are very helpfull if u have ems but i have hondata.