Your issue with the Remote FNR Switch might be nothing more than a software configuration. I came across this info while looking for calibration information.
The Remote FNR Switch is an
OPTION and not all machine have it installed.
A "Type 1" switch is Part # 246-2642 and mounts on the top surface of the console in the case of machines with separate control levers for bucket raise & tilt.
A "Type 2" switch is Part # 303-9566 and mounts in the top of the joystick handle on machines equipped with joystick controls.
Illustrations of Type 1 & Type 2 switches are shown below. You have a Type 2 switch on your machine, HOWEVER according to the Parts system it appears as though it was originally built with a Type 1 switch because the bucket controls show two separate levers for bucket raise & tilt, not a joystick.
Type 1 (246-2642) Type 2 (303-9566)
So here's the deal. In the Machine Configuration screen there is a selectable parameter for the Remote FNR switch.
It can be set as "Not Installed", "Type 1", or "Type 2", depending how the machine is equipped.
Now if the system is correct and your machine was NOT originally built with a joystick the Remote FNR Switch would have been set at the factory to either "Not Installed" or "Type 1" - I have no idea which.
It needs ET to look at the Configuration screen and set that parameter to "Type 2". See illustration below.