Hondata

I'm currently doing a k20a2 swap in to my mr2 spyder, The instructions i have say that i use the vtech pressure switch (Honda ECU (B9)) reused to be the ac switch.
I've been through the provided K-pro setup 4-5 times, everything looks right and the ac still doesn't work/

If all of the settings are correct and as i understand it it's ground to activate, If i ground pin B9 should the revs of the engine increase ?

What ECU is being used?

37820-PRA-E12

Is the AC system properly charged?

Yes, It was working perfect before the swap a week ago.

As part of the swap i also have to use a muliplexer to convert from toyota to honda, so at the moment i'm just trying to fault find.

If i earth pin B9 should the revs go up ? I'm starting to think the multiplexer might not be switching to earth.