Re: Red Light - Keyless
Your RT does have an icon to let you know your key fob battery needs replacing -- it's an icon of a key over a battery bar that's half-full, and displays in the area of your dash just to the right of your trip odometer. If it's the only icon showing, it will be the top icon in that panel. If you see the key icon with a "?" below it, it usually means you have started your bike, then moved the key out of range. When this icon appears, don't shut off the bike unless you know where your key fob is. Worst case -- you laid your key fob on top of the gas pump at that last fuel pump, then rode off with the key still there. Bike still runs, but won't restart (unless you have your emergency key and know how to use it). Can be a bad situation if you don't have enough gas to get back to where you left your key. (No, this hasn't happened to me -- yet!). I keep my key fob in my front pants pocket, and it only comes out if I need to lock my 28L topcase, which is not part of the central-locking system on the bike.
BTW, I've had that red light pop up when I've pushed the "Ignition" button and my key fob is either hidden by the gas tank and my tank bag, and is right at the limit of the 1m (3.3ft) range.
Hope you have the "right" manual (mine is dated -- on the back cover -- 09.2014, for my 2015 bike).
'12 Triumph Bonneville
'15 BMW R1200RT