DESCRIPTION The air mix damper servo motor (for passenger side) sends pulse signals to inform the air conditioning amplifier of the damper position. The air conditioning amplifier activates the motor (normal, reverse) based on the signals to move the air mix damper (for passenger side) to any position. As a result the amount of air that has passed through the evaporator and is now passing through the heater core is adjusted, and the temperature of the air blowing toward the passenger side is controlled.
WIRING DIAGRAM 
PROCEDURE
(a) Use the Data List to check if the servo motor is functioning properly. Air Conditioner
OK: The display is as specified in the normal condition. Result
(a) Temporarily replace the air mix servo motor with a new one (see page
HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new one and check that the condition returns to normal.
(a) Clear the DTC (see page (b) Check for DTC (see page OK: DTC is not output.
(a) Replace the air conditioning harness.
(a) Clear the DTC (see page (b) Check for DTC again (see page OK: DTC is not output.
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Toyota Tundra Service Manual > Rear View Monitor System(for Radio And Display Type): System Description
SYSTEM DESCRIPTION 1. GENERAL (a) This system has a television camera assembly mounted on the tail gate to assist the driver in parking the vehicle by displaying an image of the area behind the vehicle. The system displays the image on the radio and display receiver assembly. (b) This system consist ...
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