Take the battery terminal's negative cable off before you begin work. Remove the center console. On Camry models you must carefully remove the center register with a trim tool by pry-pulling from each side of the instrument panel to disengage the clips. Remove the audio/navigation unit if equipped. Pull the metal clips on both sides that keep the audio/navigation unit attached. Move the audio/navigation unit with one hand while pulling out the A/C Switch on the side with the other hand, and let the release clips fall free. To install, repeat all the steps you did to take out the components. When the engine runs, confirm A/C works correctly.