Entering the self-diagnostic function with the HDS
WARNING: This page is about a different car, the 2013 Honda Fit, 2012 Honda Fit, 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.
Using the HDS, select Body Electrical, Gauges, then Function Test and do the self-diagnostic function.