ACTUATOR CHECK 1. ACTUATOR CHECK 
(a) Turn the ignition switch ON while pressing the A/C control AUTO switch and Recirculation / Fresh switch simultaneously. (b) Press the Recirculation / Fresh switch. 
(c) As each damper, motor and relay automatically operate the actuator check at 1 second intervals from step No. 1 to No. 10 continuously, check the temperature and airflow visually and by hand. HINT:
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Toyota Tundra Service Manual > Audio And Visual System: System Description
SYSTEM DESCRIPTION 1. TOUCH SWITCH OUTLINE (a) Touch switches are touch-sensitive (interactive) switches operated by touching the screen. When a switch is pressed, the outer film bends in to contact the inner glass at the pressed position. By doing this, the voltage ratio is measured and the pressed ...
