not sure on Gen 3 but on my Gen2 , if you take out the console & transfer lever then you have access to the switches.

As I say not sure on the gen 3 , but if it were me I would be cutting myself an access hole in the floor pan before I removed the transfer case, they are H U G E & weigh heaps, a real bugger of a job.

BTW I had the same code on my Gen3 & it went on for weeks (flashing CD light) but then it just fixed itself!! believe it or not, my next step was replacing the switches.

97 Exceed, 3.5l SOHC auto, 4.90 gears, ARB front locker,rear Harrop E-Locker, Magnum winch, dual transfer cases also 2008 NS swb Pajero, front bar & winch