Well, I got through wiring up the PLX to the s300 yesterday. The PLX display reads fine and when I hooked it up to the s300 it showed ELD voltage and a correct lambda value (when the display read 14.7 the value in the s300 was 1).
I went into the setting and set it to use ELD pin 10, and to display A/F instead of lambda but it won't display the A/F it just keeps showing the lambda.
I hooked the wideband up as per the instructions on the hondata tech section (Method #1) and since i'm getting a lambda value I would assume its working correctly and getting a signal.
How in the world do I get it to read the A/F so I have some small chance at understanding it during datalogs haha