Unit Check (Quick Check): Aircon
WARNING: This page is about a different car, the 2011 Honda Pilot, 2010 Honda Pilot, and 2009 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic tests the climate bus connection (AC-SI and AC-SO) between the navigation unit and climate control unit. Make sure the engine is running for this test.
When the connection appears NG, go to NAVIGATION CANNOT CONTROL HVAC BY VOICE COMMAND .