TOYOTA SIENNA 2007 Service Repair Manual

AC–98AIR 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
E143742E50
Tester Connection Condition Specified Condition
A9-15 (AMPC) - A18-4 Always Below 1
A9-14 (AMPH) - A18-5 Always Below 1
A9-15 (AMPC) - Body
groundAlways 10 k or higher
A9-14 (AMPH) - 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–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–100AIR 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 "RECIRCULATION" (-
10%), the actual opening angle is 19.0% or less.
When the target position is "FRESH" (110%), the
actual opening angle is 81.0% or more.
Result
B
C
A
(a) Remove the glove box to see and check the recirculation
damper operation.
(b) Connect the intelligent tester to the DLC3.
(c) Turn the ignition switch to the ON position and turn the
intelligent tester main switch on.
(d) Select the item below in the ACTIVE TEST and then
check that the damper operates.
ACTIVE TEST / AIR CONDITIONER
OK:
Lever turns from "RECIRCULATION" side to
"FRESH" side smoothly.
Lever turns from "FRESH" side to
"RECIRCULATION" side smoothly.
Result
B
Tester Display Measurement Item/Range Normal Condition Diagnostic Note
A/I DAMP POSAir inlet damper position / min.: -
14%, max.: 113.5%Damper is at
"RECIRCULATION": -10%
Damper is at "HALF-
RECIRCULATION": 35 to 75%
Damper is at "FRESH": 110%Open in the circuit: 50.0%
A/I DAMP TARGAir inlet damper target position /
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/I DAMP-LINEAR Air inlet damper position (linear) 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

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–101
AC
C
A
(a) Remove the glove box to see and check the recirculation
damper operation.
(b) Enter the actuator check mode (See page AC-15).
(c) Press the DEF switch and check the operation of the
recirculation damper.
OK:
Recirculation damper position changes in
accordance with each display code.
Result
B
C
AREPLACE A/C AMPLIFIER
3PERFORM ACTUATOR CHECK
Display Code Recirculation Damper Position
0FRESH (110%)
1FRESH (110%)
2FRESH (110%)
3 R/F (50%)
4 RECIRCULATION (-10%)
5 RECIRCULATION (-10%)
6 RECIRCULATION (-10%)
7 RECIRCULATION (-10%)
8 RECIRCULATION (-10%)
9 RECIRCULATION (-10%)
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–102AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
(a) Remove the air inlet control servo motor.
(b) Disconnect the connector from the air inlet control servo
motor.
(c) Connect the positive (+) lead from the battery to terminal
5 and the negative (-) lead to terminal 4, then check that
the lever turns to the "FRESH" position smoothly.
OK:
Lever turns to "FRESH" position smoothly.
(d) 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 "RECIRCULATION" position
smoothly.
OK:
Lever turns to "RECIRCULATION" position
smoothly.
NG
OK
(a) Disconnect the connector from the A/C amplifier.
4INSPECT AIR INLET CONTROL SERVO MOTOR
E145188E02
REPLACE AIR INLET CONTROL SERVO
MOTOR
5CHECK HARNESS AND CONNECTOR (AIR INLET CONTROL SERVO MOTOR - A/C
AMPLIFIER)
E145121E10

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–103
AC
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
E143742E40
Tester Connection Condition Specified Condition
A9-17 (AIR) - A16-4 Always Below 1
A9-16 (AIF) - A16-5 Always Below 1
A9-17 (AIR) - Body
groundAlways 10 k or higher
A9-16 (AIF) - Body
groundAlways 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR
REPLACE A/C AMPLIFIER

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–105
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 "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
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 that the air flow position by hand.
ACTIVE TEST / AIR CONDITIONER
OK:
Air comes out from the selected air outlet.
Result
B
C
Tester Display Measurement Item/Range Normal Condition Diagnostic Note
A/O DAMP POSAir outlet damper position / min.: -
14%, max.: 113.5%Damper is at "FACE": 0%
Damper is at "FACE/FOOT":
33.5%
Damper is at "FOOT": 53.5%
Damper is at "FACE/DEF": 73.5%
Damper is at "DEF": 100%Open in the circuit: 50.0%
A/O DAMP TARGAir outlet damper target position /
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-DAir outlet damper position (Driver
side)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

AC–106AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
A
(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
0 FACE (0%)
1 FACE (0%)
2 FACE (0%)
3 FACE (0%)
4 FACE (0%)
5FACE/FOOT (33.5%)
6 FOOT (53.5%)
7 FOOT (53.5%)
8FACE/DEF (73.5%)
9 DEF (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

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–107
AC
(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.
NG
OK
(a) Disconnect the connector from the A/C amplifier.
4INSPECT AIR OUTLET CONTROL SERVO MOTOR
E147338E02
REPLACE AIR OUTLET CONTROL SERVO
MOTOR
5CHECK HARNESS AND CONNECTOR (AIR OUTLET CONTROL SERVO MOTOR - A/C
AMPLIFIER)
E145121E11