DESCRIPTION The No. 1 damper servo sub-assembly (air mix servo motor) 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 No. 1 damper servo sub-assembly (air mix servo motor) 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 driver side is controlled. HINT: Confirm that no mechanical problem is present because this diagnostic trouble code can be output when either a damper link or damper is mechanically locked.
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 No. 1 damper servo sub-assembly (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 > Power Window Control System(w/ Jam Protection Function): All Power Windows does not Operate with Door Key Cylinder
DESCRIPTION When the driver door key cylinder (key linked switch) is turned, the following occurs: 1) the door lock motor receives the signal; 2) the main body ECU (multiplex network body ECU) sends the signal to the power window regulator motors; and 3) the power window motors are activated. PROCED ...
).
