If it's like our USA 1992+ (Gen II) models, the hubs are permanently "locked." There is a "center axle disconnect" that is vacuum operated, and actuates when you engage 4wd. It basically disconnects one of the CV axles from the center diff.

90 LWB Montero, 270k, 265/75R16, 16x8 ARE Bajas, Budget Lift, Towbar, Aux Brakes (towed with camper), Jotto Desk, remote oil filter
92 bone stock base model beater
Parting out 4 more