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 > Cruise Control System: Cruise Control Switch Circuit
DESCRIPTION The cruise control main switch is used to turn the cruise control system on and off, as well as operate 7 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP and CANCEL. The SET, TAP-DOWN and - (COAST) functions, and the RES (RESUME), TAP-UP and + (ACCEL) functions are o ...
