In the fuse box under the bonnett there are some relays im not exactly 100% if the correct one is there but there will be a relay controlling your lights, dash etc. its prolly burnt out. these are the big square plug on things under there. check that one of them doesnt look corroded. if it looks all burnt n stuffed find one the same. i think i used air con once before as its not as important and plug it in and see if it works. i think there is also some realays where the ecu is in the passenger footwell to the left near the door. open the panel and have a look also but i bet u its under the bonnet.
ill be able to check for you later today when i go to my garage down south to see if i can trace it for you. it wont be a fuse though. it will be a square thing n it will probably have written on it things like n.c, c, n.o and xxx amount of AMPS its rated to.
i think the biggest problem is that all descriptions are in japanese. maybe google it as well.
Callum