Adaptive Cruise Control (ACC) Indicator (Green)
WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
If the ACC system is normal, the indicator comes on when the MAIN switch is ON, and goes off when the MAIN switch is OFF. If the ACC system malfunctions, the indicator color changes from green to amber, and stays on.