CA18 Gurus Help! Need to identify a valve

[Rustys14]

So I'm about to drop my ca18 in this weekend and am mostly done prepping the engine but I can't seem to figure out where this green valve on the block connects to. At first I thought it was part of the pcv system but after tracing the lines it seems that is not the case (although if the pcv system is as convoluted as the butterfly setup on this motor I could very well be missing something). Does anyone know what this valve is and where it connects too? I can't seem to find anything about it online and I have been unable to locate any reference to it in the fsm. I have a European fsm so I'm thinking it might be a Japan only thing since the European Ca engines have quite a few differences. Pics are below, any help would be greatly appreciated!







So you can get a idea of where its located in relation to the intake side of the motor


The hose that runs directly below the valve is part of the pcv system that is connected to the rear of the valve cover and runs to the oil filter housing. I don't see any place for it to T into the system or connect to the manifold, which has me thinking that it is not pcv related but as I said before I could be wrong...