July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Rear Window Defogger Timer Operation
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.
The rear MICU controls the rear window defogger timer based on inputs from each switch.