TOYOTA SIENNA 2007 Service Repair Manual

AIR CONDITIONING – COMPRESSOR AND MAGNETIC CLUTCHAC–231
AC
(b) Disconnect the connector from the magnetic clutch.
(c) Measure the resistance according to the value(s) in
the table below.
Standard resistance
If the resistance is not as specified, replace the
compressor and magnetic clutch.
4. INSPECT MAGNETIC CLUTCH
(a) Measure the resistance according to the value(s) in
the table below.
Standard resistance
(b) When connector terminal A1 is connected to the
positive (+) battery terminal, check that the following
occurs: 1) the magnetic clutch's operating sound
can be heard, and 2) the magnetic clutch's hub and
rotor lock.
If the result is not as specified, replace the magnetic
clutch.
REASSEMBLY
1. INSTALL MAGNETIC CLUTCH ASSEMBLY
(a) Install the magnetic clutch stator while aligning the
protrusion on the stator with the notch on the air
compressor assembly as shown in the illustration.
(b) Using a snap ring expander, install a new snap ring
with the chamfered side facing up.
NOTICE:
Take care not to damage the seal cover of the
bearing when installing the snap ring.
(c) Install the screw and connect the connector.
E124482E05
Tester Connection Condition Specified Condition
3 (MG+) - 1 Always Below 1
3 (MG+) - Body ground Always 10 k or higher
E147609E02
Tester Connection Condition Specified Condition
1 - Body ground Always 3.4 to 3.8
E145257
E145260E02

AC–232AIR CONDITIONING – COMPRESSOR AND MAGNETIC CLUTCH
AC
(d) Using a snap ring expander, install the magnetic
clutch rotor and a new snap ring with the chamfered
side facing up.
NOTICE:
• Do not expand the snap ring by more than
35.5 mm (1.39 in.) when installing it.
• Do not damage the seal cover of the bearing
when installing the snap ring.
(e) Install the magnet clutch washer and the magnet
clutch hub.
NOTICE:
Do not change the combination of the magnetic
clutch washers used before disassembly.
(f) Using vise pliers, hold the magnetic clutch hub and
install the bolt.
Torque: 18 N*m (183 kgf*cm, 13 ft.*lbf)
NOTICE:
Make sure that there is no foreign matter or oil
on the compressor shaft, bolt, and clutch hub.
INSTALLATION
1. INSTALL COMPRESSOR AND MAGNETIC CLUTCH
(a) Using a "TORX" socket wrench (E8), install the
compressor and magnetic clutch with the 2 stud
bolts.
Torque: 10 N*m (102 kgf*cm, 7.4 ft.*lbf)
HINT:
Tighten the stud bolts in the order shown in the
illustration.
(b) Install the compressor and magnetic clutch with the
2 bolts and the 2 nuts.
Torque: 25 N*m (255 kgf*cm, 18 ft.*lbf)
HINT:
Tighten the bolts and nuts in the order shown in the
illustration.
(c) Connect the 2 clamps and wire harness.
(d) Connect the connector.
2. INSTALL SUCTION HOSE SUB-ASSEMBLY
(a) Remove the attached vinyl tape from the hose.
(b) Apply sufficient compressor oil to a new O-ring and
the fitting surface of the compressor and magnetic
clutch.
Compressor oil:
ND-OIL 8 or equivalent
(c) Install the O-ring onto the suction hose sub-
assembly.
E145261E02
E145262
E146649E01
E146650E01

AIR CONDITIONING – COMPRESSOR AND MAGNETIC CLUTCHAC–233
AC
(d) Install the suction hose sub-assembly onto the
compressor and magnetic clutch with the bolt.
Torque: 5.4 N*m (55 kgf*cm, 48 in.*lbf)
3. INSTALL DISCHARGE HOSE SUB-ASSEMBLY
(a) Remove the attached vinyl tape from the hose.
(b) Apply sufficient compressor oil to a new O-ring and
the fitting surface of the compressor and magnetic
clutch.
Compressor oil:
ND-OIL 8 or equivalent
(c) Install the O-ring onto the discharge hose sub-
assembly.
(d) Install the discharge hose sub-assembly onto the
compressor and magnetic clutch with the bolt.
Torque: 5.4 N*m (55 kgf*cm, 48 in.*lbf)
4. INSTALL RADIATOR AND FAN ASSEMBLY
(See page CO-39)
5. INSTALL V-RIBBED BELT (See page EM-7)
6. INSTALL FRONT FENDER APRON SEAL RH (See
page EM-62)
7. INSTALL FRONT WHEEL RH
8. CHARGE WITH REFRIGERANT (See page AC-173)
9. WARM UP ENGINE
10. INSPECT FOR REFRIGERANT LEAK (See page AC-
173)
E145265
E145264

AC–244AIR CONDITIONING – EVAPORATOR TEMPERATURE SENSOR
AC
EVAPORATOR TEMPERATURE
SENSOR
ON-VEHICLE INSPECTION
1. INSPECT A/C EVAPORATOR TEMPERATURE
SENSOR
(a) Remove the A/C evaporator temperature sensor (A/
C thermistor).
(b) Disconnect the connector from the A/C evaporator
temperature sensor (A/C thermistor).
(c) Measure the resistance according to the value(s) in
the table below.
Standard resistance
NOTICE:
• Even slightly touching the sensor may
change the resistance value. Be sure to hold
the connector of the sensor.
• When measuring, the sensor temperature
must be the same as the ambient
temperature.
HINT:
As the temperature increases, the resistance
decreases (see the graph).
If the resistance is not as specified, replace the A/C
evaporator temperature sensor (A/C thermistor).
E148014E01
Tester connection Condition Specified condition
1 - 2 -10
C (14F) 7.30 to 9.10 k
1 - 2 -5C (23F) 5.65 to 6.95 k
1 - 2 0C (32F) 4.40 to 5.35 k
1 - 2 5C (41F) 3.40 to 4.15 k
1 - 2 10C (50F) 2.70 to 3.25 k
1 - 2 15C (59F) 2.14 to 2.58 k
1 - 2 20C (68F) 1.71 to 2.05 k
1 - 2 25C (77F) 1.38 to 1.64 k
1 - 2 30C (86F) 1.11 to 1.32 k

AIR CONDITIONING – AIR CONDITIONING PRESSURE SENSORAC–247
AC
AIR CONDITIONING PRESSURE
SENSOR
ON-VEHICLE INSPECTION
1. INSPECT A/C PRESSURE SENSOR
(a) Install the manifold gauge set.
(b) Disconnect the connector from the A/C pressure
sensor.
(c) Connect the three 1.5 V dry cell batteries' positive
(+) lead to terminal 3 and the negative (-) lead to
terminal 1.
(d) Connect the voltmeter's positive (+) lead to terminal
2 and the negative (-) lead to terminal 1.
(e) Measure the voltage according to the value(s) in
the table below.
Standard voltage
If the result is not as specified, replace the A/C
pressure sensor.
E107326E13
Tester Connection Condition Specified Condition
2 - 1Refrigerant pressure:
0.39 to 3.187 MPa (57 to
463 psi)1.0 to 4.8 V

AIR CONDITIONING – HEATER RELAYAC–249
AC
HEATER RELAY
ON-VEHICLE INSPECTION
1. INSPECT HEATER RELAY
(a) Remove the heater relay.
(b) Measure the resistance according to the value(s) in
the table below.
Standard resistance
If the resistance is not as specified, replace the
heater relay.
E032993
Tester Connection Condition Specified Condition
3 - 5Always 10 k
or higher
When battery voltage is
applied to terminals 1
and 2Below 1
3 - 4Always Below 1 When battery voltage is
applied to terminals 1
and 210 k
or higher

AC–250AIR CONDITIONING – HEATER RELAY (for Rear Air Conditioning System)
AC
HEATER RELAY (for Rear Air
Conditioning System)
ON-VEHICLE INSPECTION
1. INSPECT REAR HEATER RELAY
(a) Remove the rear heater relay.
(b) Measure the resistance according to the value(s) in
the table below.
Standard resistance
If the resistance is not as specified, replace the rear
heater relay.
E032993
Tester Connection Condition Specified Condition
3 - 5Always 10 k
or higher
Wh en ba ttery vo ltag e is
applied to terminals 1
and 2Below 1
3 - 4Always Below 1 Wh en ba ttery vo ltag e is
applied to terminals 1
and 210 k
or higher

AIR CONDITIONING – INTEGRATION CONTROL AND PANELAC–255
AC
REMOVAL
1. REMOVE INSTRUMENT CLUSTER FINISH PANEL
CENTER NO.1 (See page IP-8)
2. REMOVE INSTRUMENT CLUSTER FINISH PANEL
CENTER NO.2
3. REMOVE SHIFT LEVER KNOB SUB-ASSEMBLY
HINT:
(See page AX-146 for U151E, AX-146 for U151F)
4. REMOVE INSTRUMENT CLUSTER FINISH PANEL
ASSEMBLY CENTER (See page IP-9)
5. REMOVE INSTRUMENT CLUSTER FINISH PANEL
GARNISH (See page IP-9)
6. REMOVE RADIO RECEIVER ASSEMBLY WITH
BRACKET (w/o Navigation System) (See page AV-
169)
7. REMOVE RADIO RECEIVER ASSEMBLY WITH
BRACKET (w/ Navigation System)
8. REMOVE INTEGRATION CONTROL AND PANEL
ASSEMBLY
(a) Remove the 4 screws, and release the integration
control & panel assembly.
(b) Disconnect the connectors and remove the
integration control & panel assembly.
DISASSEMBLY
1. REMOVE CENTER CLUSTER MODULE KNOB NO.1
(for Manual Air Conditioning System)
(a) Remove the center cluster module knob No. 1.
2. REMOVE CENTER CLUSTER MODULE KNOB NO.2
(for Manual Air Conditioning System)
(a) Release the 2 claws fittings and remove the center
cluster module knob No. 2.
NOTICE:
Take care not to break the claws on the knob.
I035724
I035725
I035726E01

AC–256AIR CONDITIONING – INTEGRATION CONTROL AND PANEL
AC
3. REMOVE AIR CONDITIONER AMPLIFIER ASSEMBLY
(for Manual Air Conditioning System)
(a) Remove the plate.
(b) Release the lock of the connector and disconnect
the cable.
(c) Remove the 4 screws, and the heater control
housing.
(d) Remove the 4 screws, and the air conditioner
amplifier assembly.
4. REMOVE AIR CONDITIONER AMPLIFIER ASSEMBLY
(for Automatic Air Conditioning System)
(a) Release the 8 claw fittings and remove the 4 screws
and the heater control housing.
I035727
I035728
I035729
I035730
I035731E01

AIR CONDITIONING – INTEGRATION CONTROL AND PANELAC–257
AC
(b) Disconnect the 2 connectors.
(c) Remove the 5 screws and the air conditioner
amplifier assembly.
5. REMOVE INTEGRATION CONTROL AND PANEL
BULB (for Manual Air Conditioning System)
(a) Remove the integration control & panel bulb.
6. REMOVE HEATER BLOWER SWITCH (for Manual Air
Conditioning System)
(a) Remove the 3 nuts, and the 3 washers.
(b) Release the 6 claw fittings and remove the 5 screws
and printed wire integration board sub-assembly.
I035732
I035733
I035734
I035735
I035736E01