sensor TOYOTA SIENNA 2007 Service Repair Manual

AC–74AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
DESCRIPTION
This sensor detects the position of the air inlet control servo motor and sends the appropriate signals to
the A/C amplifier. The position sensor is built in the air inlet control servo motor.
The position sensor's resistance changes as the air inlet control servo motor arm moves.
It outputs voltage (5 V) that is input to terminal 1 and terminal 3 via the variable resistor, and then to the A/
C amplifier.
The A/C amplifier determines the arm position based on the input voltage from the position sensor.
DTC B1432/32 Air Inlet Damper Position Sensor Circuit
DTC No. DTC Detection Condition Trouble Area
B1432/32Open or short in power source circuit in air inlet damper
position sensor circuit• Air inlet control servo motor (air inlet damper
position sensor)
• Harness or connector between air inlet control
servo motor (air inlet damper position sensor) and
A/C amplifier
• A/C amplifier
E109300E25

AC–78AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
DESCRIPTION
This sensor detects the position of the air outlet control servo motor and sends the appropriate signals to
the A/C amplifier. The position sensor is built in the air outlet control servo motor. The position sensor's
resistance changes as the air outlet control servo motor arm moves.
It outputs voltage (5 V) that is input to terminal 2 and terminal 3 via the variable resistor, and then to the A/
C amplifier. The A/C amplifier determines the arm position based on the input voltage from the position
sensor.
DTC B1433/33 Air Outlet Damper Position Sensor Circuit
DTC No. DTC Detection Condition Trouble Area
B1433/33Open or short in power source circuit in air outlet
damper position sensor circuit.• Air outlet control servo motor (air outlet damper
position sensor)
• Harness or connector between air outlet control
servo motor (air outlet damper position sensor) and
A/C amplifier
• A/C amplifier
E109300E01

AC–82AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
DESCRIPTION
This sensor detects the position of the air mix control servo motor (air outlet damper) and sends the
appropriate signals to the A/C amplifier. The position sensor is built in the air mix control servo motor. The
position sensor resistance changes as the air mix control servo motor arm moves.
It outputs voltage (5 V) that is input to terminal 1 and terminal 3 via the variable resistor, and then to the A/
C amplifier. The A/C amplifier determines the arm position based on the input voltage from the position
sensor.
DTC B1436/36Air Mix Damper Position Sensor Circuit (Driver
Side)
DTC No. DTC Detection Condition Trouble Area
B1436/36Open or short in power source circuit in air mix damper
position sensor circuit.• Air mix control servo motor (air mix damper position
sensor)
• Harness or connector between air mix control servo
motor and A/C amplifier
• A/C amplifier
E109300E01

AC–86AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
DESCRIPTION
This sensor detects the position of the rear air mix control servo motor (water valve servo motor) and
sends the appropriate signals to the A/C amplifier. The position sensor is built in the rear air mix control
servo motor (water valve servo motor).
The position sensor's resistance changes as the rear air mix control servo motor valve moves.
It outputs voltage (5 V) that is input to terminal 2 and terminal 3 via the variable resistor, and then to the A/
C amplifier.
The A/C amplifier determines the valve position based on the input voltage from the position sensor.
DTC B1437/37 Rear Air Mix Damper Position Sensor Circuit
DTC No. DTC Detection Condition Trouble Area
B1437/37Open or short in power source circuit in rear air mix
damper position sensor circuit.• Rear air mix control servo motor (water valve servo
motor)
• Harness and connector between rear air mix
control servo motor (water valve servo motor) and
A/C amplifier
• A/C amplifier
E109300E26

AC–90AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
DESCRIPTION
This sensor detects the position of the rear air outlet control servo motor and sends the appropriate
signals to the A/C amplifier. The position sensor is built in the rear air outlet control servo motor.
The position sensor's resistance changes as the rear air outlet control servo motor arm moves.
It outputs voltage (5 V) that is input to terminal 2 and terminal 3 via the variable resister, and then to the A/
C amplifier.
The A/C amplifier determines the arm position based on the input voltage from the position sensor.
DTC B1439/39 Rear Air Outlet Damper Position Sensor Circuit
DTC No. DTC Detection Condition Trouble Area
B1439/39Open or short in power source circuit in rear air outlet
damper position sensor circuit• Rear air outlet control servo motor (rear air outlet
damper position sensor)
• Harness or connector between rear air outlet
control servo motor and A/C amplifier
• A/C amplifier
E109300E01

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