Sub Display
WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
This test checks the internal connection between the audio-navigation switch panel and the audio-HVAC subdisplay If NG is indicated, check the serial bus line between the audio-navigation switch panel and the audio-navigation unit