2007 TOYOTA SIENNA wiring

AC–94AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
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, reverse) with electrical
power from the A/C amplifier.
This adjusts the mix ratio of the air that passes through the evaporator and heater core and controls the
air flow temperature. Air flow temperature changes when the air mix damper is moved to the target point.
The target point can be detected by the air mix damper position sensor.
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Connect the intelligent tester to the DLC3.
DTC B1441/41Air Mix Damper Control Servo Motor Circuit
(Passenger Side)
DTC No. DTC Detection Condition Trouble Area
B1441/41Air mix damper position sensor value does not change
even if A/C amplifier operates air mix control servo
motor.• Air mix control servo motor
• Harness or connector between air mix control servo
motor and A/C amplifier
• A/C amplifier
1READ VALUE OF INTELLIGENT TESTER
I036322E26

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–99
AC
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 (normal, reverse) with electrical
power from the A/C amplifier. This controls intake air and changes the mode between
"RECIRCULATION", "FRESH", and "HALF-RECIRCULATION".
WIRING DIAGRAM
INSPECTION PROCEDURE
(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.
DTC B1442/42 Air Inlet Damper Control Servo Motor Circuit
DTC No. DTC Detection Condition Trouble Area
B1442/42Air inlet damper position sensor value does not change
even if A/C amplifier operates air inlet control servo
motor.• Air inlet control servo motor
• Harness or connector between air inlet control
servo motor and A/C amplifier
• A/C amplifier
1READ VALUE OF INTELLIGENT TESTER
I036322E21

AC–104AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
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
(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.
DTC B1443/43 Air Outlet Damper Control Servo Motor Circuit
DTC No. DTC Detection Condition Trouble Area
B1443/43Air outlet damper position sensor value does not
change even if A/C amplifier operates air outlet control
servo motor.• Air outlet control servo motor
• Harness or connector between air outlet control
servo motor and A/C amplifier
• A/C amplifier
1READ VALUE OF INTELLIGENT TESTER
I036322E22

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–109
AC
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, reverse) with electrical
power from the A/C amplifier.
This adjusts the mix ratio of the air that passes through the evaporator and heater core and controls the
air flow temperature. Air flow temperature changes when moving the air mix damper to the target point.
The target point can be detected by the air mix damper position sensor.
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Connect the intelligent tester to the DLC3.
DTC B1446/46Air Mix Damper Control Servo Motor Circuit
(Driver Side)
DTC No. DTC Detection Condition Trouble Area
B1446/46Air mix damper position sensor value does not change
even if A/C amplifier operates air mix control servo
motor.• Air mix control servo motor
• Harness or connector between air mix control servo
motor and A/C amplifier
• A/C amplifier
1READ VALUE OF INTELLIGENT TESTER
I036322E23

AC–114AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
DESCRIPTION
The rear air mix control servo motor (water valve servo motor) is controlled by the A/C amplifier.
The rear air mix control servo motor moves the air mix damper by rotating (normal, reverse) with electrical
power from the A/C amplifier.
WIRING DIAGRAM
INSPECTION PROCEDURE
(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.
DTC B1447/47Rear Air Mix Damper Control Servo Motor Cir-
cuit
DTC No. DTC Detection Condition Trouble Area
B1447/47Rear air mix damper position sensor value does not
change even if A/C amplifier operates rear air mix
control servo motor.• Rear air mix control servo motor (water valve servo
motor)
• Harness or connector between rear air mix control
servo motor and A/C amplifier
• A/C amplifier
1READ VALUE OF INTELLIGENT TESTER
I036322E24

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–119
AC
DESCRIPTION
This circuit turns the servo motor and changes each damper position by receiving the signals from the A/
C amplifier.
The rear air outlet damper servo motor switches the air outlet mode by rotating (normal, reverse) with
electrical power from the A/C amplifier.
WIRING DIAGRAM
INSPECTION PROCEDURE
(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.
DTC B1449/49Rear Air Outlet Damper Control Servo Motor
Circuit
DTC No. DTC Detection Condition Trouble Area
B1449/49Rear air outlet damper position sensor value does not
change even if A/C amplifier operates rear air outlet
control servo motor.• Rear air outlet control servo motor
• Harness or connector between rear air outlet
control servo motor and A/C amplifier
• A/C amplifier
1READ VALUE OF INTELLIGENT TESTER
I036322E25

AC–124AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
DESCRIPTION
In this circuit, the compressor receives a refrigerant compression demand signal from the A/C amplifier.
Based on this signal, the compressor changes the amount of compressor output.
WIRING DIAGRAM
DTC B1451/51 Compressor Solenoid Circuit
DTC No. DTC Detection Condition Trouble Area
B1451/51Open or short in solenoid of externally changeable
compressor circuit• A/C compressor
• Harness or connector between A/C amplifier and
solenoid of externally changeable compressor
• A/C amplifier
E116880E08

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–129
AC
WIRING DIAGRAM
INSPECTION PROCEDURE
(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 DATA LIST, and read the
display on the intelligent tester.
DATA LIST / AIR CONDITIONER
OK:
The display is as specified in the normal condition
column.
NG
OK
(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.
1READ VALUE OF INTELLIGENT TESTER
C119463E03
Tester Display Measurement Item/Range Normal Condition Diagnostic Note
BLOWER LEVELBlower motor speed level / min.:
Level 0, max.: Level 31Changes depending on blower
level-
Go to step 2
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2PERFORM ACTIVE TEST BY INTELLIGENT TESTER