2007 TOYOTA SIENNA wiring diagram

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

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–135
AC
DESCRIPTION
When the A/C amplifier is turned on, a magnetic clutch ON signal is sent from the MGC terminal of the A/
C amplifier. Then, the MG CLT relay turns on to operate the magnetic clutch.
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Use the intelligent tester to check if the CAN
communication system is functioning normally.
Result
Air Conditioning Compressor Magnetic Clutch Circuit
1CHECK CAN COMMUNICATION SYSTEM
E124490E08
Result Proceed to
CAN DTC is not output A
CAN DTC is output B

AC–140AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
DESCRIPTION
This is the rear A/C system control signal circuit as well as the power supply circuit of the rear A/C control
assembly.
Pulse signals regarding rear A/C control panel switch operation are transmitted between the A/C amplifier
and rear A/C control assembly.
WIRING DIAGRAM
Rear Air Conditioning Control Panel Circuit
E147373E01

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–143
AC
DESCRIPTION
The RR A/C relay is switched on by signals from the A/C amplifier. It supplies power to the rear blower
motor.
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Remove the RR A/C relay from the No. 3 relay block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
Rear Air Conditioning Relay Circuit
1INSPECT RELAY (RR A/C)
E147374E01
E148195
Tester Connection Condition Specified Condition
3 - 4 Always Below 1
3 - 4When battery voltage
applied to terminals 1
and 210 k or higher
3 - 5 Always 10 k
or higher
3 - 5When battery voltage
applied to terminals 1
and 2Below 1
REPLACE RELAY (RR A/C)