Originally Posted by
GVK.
If I understood his original post correctly...
He has an AEM wide-band set up displaying AFR, but he is also wanting to monitor the factory (narrow-band?) Lambda voltages and wishes to know the corresponding AFR from those outputs?
Possibly, I guess he is a little vague in that respect.
Factory NB setups will use an almost generic voltage output vs AFR. However....they are only deemed accurate at 14.7:1, so ther really isnt any point trying to compare voltages/AFR's obtained outside of that as they are nowhere near linear.
Some Toyotas do convert a NB signal to a 0-5v output, but it is still a NB, and doubtful it is linear.
But again, there is no generic answer that xyz brand WB outputs 123v for 567 AFR
They are all different.