wow, 2007 and 2012 in one blue box....
or open the glove box, extract operators guide,
read that page for that lamp, bingo the name and the cause and what to do. lost the manual they are free at honda. or here.
http://justgivemethedamnmanual.com/honda/honda-ridgeline-owners-manua/
page 70, read this.... I can RTM, sure can....
quote
VTM-4 lamp (your 4wd?)
This indicator normally comes on for
a few seconds when you turn the
ignition switch to the ON (II)
position. If it comes on at any other
time, there is a problem in the 4WD
system. Take the vehicle to your
dealer to have it checked.
If the indicator blinks while driving,
the VTM-4 fluid temperature is too
high. Pull to the side of the road
when it is safe, shift to Park, and let
the engine idle until the indicator
goes out.
Continuing to drive with the VTM-4
indicator blinking may cause serious
damage to the system. (end page70)
if really DIY guy?
the then the FSM elaborates this to no end.
buy the FSM and read that. (most things on most newer cars are anything but simple)