Toyota Tundra Service Manual: Actuator Check

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:

• If a slower display is desired, press the driver temperature up switch and change the display in the step operation. Each time the driver temperature up switch is pressed, the display changes by 1 step.
• The buzzer sounds when the displayed trouble code changes.
• Codes are displayed from smaller to larger numbers in order.
• To cancel the check mode, press the "OFF" switch.