TOYOTA SIENNA 2007 Service Repair Manual

AC–118AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
E141047E11
Tester Connection Condition Specified Condition
A10-3 (MHH) - W2-4 Always Below 1
A10-4 (MCH) - W2-5 Always Below 1
A10-3 (MHH) - Body
groundAlways 10 k or higher
A10-4 (MCH) - Body
groundAlways 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR
REPLACE A/C AMPLIFIER

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–120AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
(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 "FACE1" (0%), the
actual opening angle is 19.0% or less.
When the target position is "FOOT" (100%), the
actual opening angle is 81.0% or more.
Result
B
C
A
(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 the air flow position by hand.
ACTIVE TEST / AIR CONDITIONER
OK:
Air comes out from the selected air outlet.
Result
B
C
A
Tester Display Measurement Item/Range Normal Condition Diagnostic Note
A/O DAMP POS-RAir outlet mode damper position
(Rear) / min.: -14%, max.: 113.5%Damper is at "FACE1": 0%
Damper is at "FACE2": 16.5%
Damper is at "FACE/FOOT": 44%
Damper is at "FOOT": 100%Open in the circuit: 50.0%
A/O DAMP TARG-RAir outlet mode damper target
position (Rear) / min.: -14%,
max.: 113.5%
Result Proceed to
NGA
OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B
OK (When troubleshooting according to the DTC) C
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
REPLACE A/C AMPLIFIER
2PERFORM ACTIVE TEST BY INTELLIGENT TESTER
Tester Display Test Part Control Range Diagnostic Note
A/O MODE DAMP-R Air outlet damper position (Rear) min.: -14%, max.: 113.5% -
Result Proceed to
NGA
OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B
OK (When troubleshooting according to the DTC) C
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
REPLACE A/C AMPLIFIER

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–121
AC
(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
B
C
A
3PERFORM ACTUATOR CHECK
Display Code Air flow condition
0FACE1 (0%)
1FACE1 (0%)
2FACE1 (0%)
3 FACE2 (16.5%)
4 FACE/FOOT (44%)
5 FACE/FOOT (44%)
6 FACE/FOOT (44%)
7FOOT (100%)
8FOOT (100%)
9FOOT (100%)
Result Proceed to
NGA
OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B
OK (When troubleshooting according to the DTC) C
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
REPLACE A/C AMPLIFIER

AC–122AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
(a) Remove the rear air outlet control servo motor.
(b) Disconnect the connector from the rear 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 "FOOT" position smoothly.
OK:
Lever turns to "FOOT" 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.
NG
OK
(a) Disconnect the connector from the A/C amplifier.
4INSPECT REAR AIR OUTLET CONTROL SERVO MOTOR
E145190E02
REPLACE REAR AIR OUTLET CONTROL
SERVO MOTOR
5CHECK HARNESS AND CONNECTOR (REAR AIR OUTLET CONTROL SERVO MOTOR -
A/C AMPLIFIER)
E145121E14

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–123
AC
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
E141047E12
Tester Connection Condition Specified Condition
A10-2 (FACE) - A30-5 Always Below 1
A10-1 (FOOT) - A30-4 Always Below 1
A10-2 (FACE) - Body
groundAlways 10 k or higher
A10-1 (FOOT) - Body
groundAlways 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR
REPLACE A/C AMPLIFIER

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–125
AC
INSPECTION PROCEDURE
(a) Disconnect the A/C compressor connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
(a) Disconnect the A/C compressor connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
1INSPECT A/C COMPRESSOR
E116970E11
Tester Connection Condition Specified Condition
A32-2 (SOL+) - A32-1
(SOL-)20
C (68F) 10 to 11
REPLACE A/C COMPRESSOR
2CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR - BODY GROUND)
E116971E16
Tester Connection Condition Specified Condition
A32-1 (SOL-) - Body
groundAlways Below 1
REPAIR OR REPLACE HARNESS OR
CONNECTOR

AC–126AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
(a) Disconnect the A/C compressor connector.
(b) Disconnect the A/C amplifier connector.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance
Result
B
C
A
3CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR - A/C AMPLIFIER)
E116971E17
E143742E43
Tester Connection Condition Specified Condition
A9-4 (SOL+) - A32-2
(SOL+)Always Below 1
A9-4 (SOL+) - Body
groundAlways 10 k or higher
Result Proceed to
NG A
OK (When troubleshooting according to the
PROBLEM SYMPTOMS TABLE)B
OK (When troubleshooting according to the DTC) C
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
REPLACE A/C AMPLIFIER
REPAIR OR REPLACE HARNESS OR CONNECTOR

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–127
AC
DESCRIPTION
INSPECTION PROCEDURE
(a) Refer to the CAN communication system (See page CA-
7).
(b) If the CAN communication system is operating normally,
proceed to the next step.
NEXT
(a) Refer to the multiplex communication system (See page
MP-4).
NEXT
DTC B1499/99 Multiplex Communication Circuit
DTC No. DTC Detection Condition Trouble Area
B1499/99• Open in CAN communication circuit
• Open in multiplex communication system• CAN communication system
• Multiplex communication system
1GO TO CAN COMMUNICATION SYSTEM
2GO TO MULTIPLEX COMMUNICATION SYSTEM (BEAN)
END