TOYOTA SIENNA 2007 Service Repair Manual

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–37
AC
(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.
Result
B
C
A
(a) Remove the rear evaporator temperature sensor.
(b) Measure the resistance according to the value(s) in the
table below.
Tester Display Measurement Item/Range Normal Condition Diagnostic Note
R-EVAP TEMP SEN
(Rear evaporator temperature
sensor)Rear evaporator temperature
sensor / min: -29.7
C (-21.46F),
max: 59.55
C (139.19F)Actual rear evaporator
temperature is displayed-
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
2INSPECT REAR EVAPORATOR TEMPERATURE SENSOR
E112577E07

AC–38AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
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 rear evaporator temperature.
HINT:
As the temperature increases, the resistance decreases
(see the graph).
NG
OK
I040629E04
Tester Connection Condition Specified Condition
A26-1 - A26-2 -10
C (14F) 7.40 to 9.20 k
A26-1 - A26-2 -5C (23F) 5.65 to 7.00 k
A26-1 - A26-2 0C (32F) 4.35 to 5.40 k
A26-1 - A26-2 5C (41F) 3.40 to 4.20 k
A26-1 - A26-2 10C (50F) 2.68 to 3.30 k
A26-1 - A26-2 15C (59F) 2.10 to 2.60 k
A26-1 - A26-2 20C (68F) 1.66 to 2.10 k
A26-1 - A26-2 25C (77F) 1.32 to 1.66 k
A26-1 - A26-2 30C (86F) 1.05 to 1.35 k
REPLACE REAR EVAPORATOR
TEMPERATURE SENSOR

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–39
AC
(a) Disconnect the rear evaporator temperature sensor
connector.
(b) Disconnect the A/C amplifier connector.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
3CHECK HARNESS AND CONNECTOR (REAR EVAPORATOR TEMPERATURE SENSOR -
A/C AMPLIFIER)
E124472E10
E141047E07
Tester Connection Condition Specified Condition
A26-2 - A10-17 (TEC) Always Below 1
A26-1 - A10-13 (SG) Always Below 1
A10-17 (TEC) - Body
groundAlways 10 k or higher
A10-13 (SG) - Body
groundAlways 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR
REPLACE A/C AMPLIFIER

AIR CONDITIONING – BLOWER MOTOR (for Rear Air Conditioning System)AC–211
AC
BLOWER MOTOR (for Rear Air
Conditioning System)
ON-VEHICLE INSPECTION
1. INSPECT COOLING UNIT MOTOR SUB-ASSEMBLY
WITH FAN
(a) Connect the positive (+) lead from the battery to
terminal 1 and negative (-) to terminal 2, then check
that the motor operates smoothly.
If operation is not as specified, replace the rear
blower motor.
E147480E02

AIR CONDITIONING – COMPRESSOR AND MAGNETIC CLUTCHAC–229
AC
DISASSEMBLY
1. REMOVE MAGNETIC CLUTCH ASSEMBLY
(a) Place the compressor and magnetic clutch in a vise.
(b) Using locking pliers, hold the magnetic clutch hub.
(c) Remove the bolt, magnetic clutch hub, and
magnetic clutch washers.
HINT:
There is no set number of magnetic clutch washers
because they are used for adjustment.
(d) Using a snap ring expander, remove the snap ring
and magnetic clutch rotor.
NOTICE:
Take care not to damage the seal cover of the
bearing when removing the snap ring.
(e) Remove the screw and disconnect the connector.
(f) Using a snap ring expander, remove the snap ring
and magnetic clutch stator.
INSPECTION
1. INSPECT MAGNETIC CLUTCH CLEARANCE
(a) Set the dial indicator to the magnetic clutch hub.
(b) Connect the battery positive lead to the terminal 1 of
the magnet clutch connector and the negative lead
to the earth wire. Turn on and off the magnetic
clutch and measure the clearance.
Standard clearance:
0.35 to 0.60 mm (0.013 to 0.023 in.)
If the measured value is not within the standard
range, remove the magnetic clutch hub and adjust it
with the magnetic clutch washers.
NOTICE:
Adjustment can be performed with 3 or less
magnetic clutch washers.
E145256
E145258
E145259
E145263

AC–230AIR CONDITIONING – COMPRESSOR AND MAGNETIC CLUTCH
AC
2. INSPECT COMPRESSOR OIL
(a) When replacing the compressor and magnetic
clutch with a new one, after gradually removing the
refrigerant gas from the service valve, drain the
following amount of oil from the new compressor
and magnetic clutch before installation.
Standard:
(Oil capacity inside new compressor and
magnetic clutch:
225 + 15 cc (7.6 + 0.5 fl.oz.)) - (Remaining oil
amount in the removed compressor and
magnetic clutch) = (Oil amount to be
removed when replacing)
NOTICE:
• When checking the compressor oil level,
observe the precautions on the cooler
removal / installation.
• Because compressor oil remains in the pipes
of the vehicle, if a new compressor and
magnetic clutch is installed without removing
some oil inside, the oil amount becomes
excessive, preventing heat exchange in the
refrigerant cycle and causing refrigerant
failure.
• If the remaining oil in the removed
compressor and magnetic clutch is too small
in volume, check for oil leakage.
• Be sure to use ND-OIL 8 for compressor oil.
3. INSPECT COMPRESSOR AND MAGNETIC CLUTCH
(a) Disconnect the connector from the compressor and
magnetic clutch.
E145186E03

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–212AIR CONDITIONING – BLOWER RESISTOR (for Manual Air Conditioning System)
AC
BLOWER RESISTOR (for Manual
Air Conditioning System)
ON-VEHICLE INSPECTION
1. INSPECT BLOWER RESISTOR (for Manual Air
Conditioning System)
(a) Measure resistance between terminals, as shown in
the table.
If resistance is not as specified, replace the blower
resistor.
E032877
Tester connection Specified condition
1 - 2 0.320 to 0.353
1 - 3 1.070 to 1.231
1 - 4 2.558 to 2.943