Unit Check (Quick Check): Aircon
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 diagnostic tests the climate bus connection (AC-SI and AC-SO) between the audio-navigation unit and climate control unit This test does not check the system components, only the connections Make sure the engine is running for this test