Toyota Sienna Service Manual: Air Outlet Damper Control Servo Motor Circuit
DESCRIPTION
This circuit turns the servo motor and changes each damper position by receiving the signals from the A/ C amplifier.
The air outlet damper servo motor switches the air outlet mode by rotating (normal, reverse) with electrical power from the A/C amplifier.
When the AUTO switch is on, the A/C amplifier changes the mode between "FACE",
"FACE/FOOT" and
"FOOT" according to the temperature setting.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the intelligent tester main switch on.
(c) Select the items below in the DATA LIST, and read the display on the intelligent tester.
DATA LIST / AIR CONDITIONER 
OK: When the target position is "FACE" (0%), the actual opening angle is 19.0% or less.
When the target position is "DEF" (100%), the actual opening angle is 81.0% or more.
Result 
2 PERFORM ACTIVE TEST BY INTELLIGENT TESTER
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the intelligent tester main switch on.
(c) Select the item below in the ACTIVE TEST and then check that the air flow position by hand.
ACTIVE TEST / AIR CONDITIONER 
OK: Air comes out from the selected air outlet.
Result 
3 PERFORM ACTUATOR CHECK
(a) Warm up the engine.
(b) Enter the actuator check mode (See page AC-15).
(c) Press the DEF switch and change to step operation.
(d) Press the DEF switch and check the air flow by hand.
OK: Air outlet mode changes in accordance with each display code.
Result 
4 INSPECT AIR OUTLET CONTROL SERVO MOTOR
(a) Remove the air outlet control servo motor.
(b) Disconnect the connector from the air outlet control servo motor.
(c) Connect the positive (+) lead from the battery to terminal 4 and the negative (-) lead to terminal 5, then check that the lever turns to the "DEF" position smoothly.
OK: Lever turns to "DEF" position smoothly.
(d) Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead to terminal 4, then check that the lever turn to the "FACE" position smoothly.
OK: Lever turns to "FACE" position smoothly.
5 CHECK HARNESS AND CONNECTOR (AIR OUTLET CONTROL SERVO MOTOR - A/C AMPLIFIER)
(a) Disconnect the connector from the A/C amplifier.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance 
REPLACE A/C AMPLIFIER
Air Inlet Damper Control Servo Motor Circuit
DESCRIPTION
The air inlet control servo motor is controlled by the A/C amplifier and
moved to the desired position.
The air inlet control servo motor switches the air inlet mode by rotating
(n ...
Air Mix Damper Control Servo Motor Circuit (Driver Side)
DESCRIPTION
The air mix control servo motor (air mix damper servo sub-assembly) is
controlled by the A/C amplifier.
The air mix control servo motor moves the air mix damper by rotating (normal, ...
Other materials:
Removal
1. REMOVE ENGINE AND TRANSAXLE
HINT:
(See page EM-26)
2. REMOVE AUTOMATIC TRANSMISSION WITH
TRANSFER
HINT:
(See page AX-164)
3. REMOVE TRANSFER ASSEMBLY
HINT:
(See page TF-8)
4. REMOVE CTR DIFFERENTIAL LOCK SLEEVE
HINT:
(See page TF-13)
5. REMOVE TRANSFER CASE OIL SEAL
(a) Using SS ...
Display does not Dim when Light Control Switch is Turned ON
INSPECTION PROCEDURE
1 CHECK IMAGE QUALITY SETTING
Enter the display adjustment screen by pressing the
"DISPLAY" switch.
Turn the light control switch to the TAIL position.
Check if "DAY MODE" on the display adjustment is ON.
OK:
"DAY MODE" ...
On-vehicle inspection
1. CHECK POWER REAR NO. 2 SEAT with STOWING FUNCTION
Check the basic functions.
Operate the fold seat switch and power rear
No.2 seat switch and check to make sure each
seat function works:
Folding-down operation
Stowing operation
Return operation
...
