radiator TOYOTA SIENNA 2007 Service Manual PDF

U151F AUTOMATIC TRANSAXLE – TORQUE CONVERTER CLUTCH AND DRIVE PLATEAX–173
AX
(d) Clean and check the oil cooler and oil pipe line.
(1) If the torque converter clutch is inspected or the
ATF is exchanged, clean the oil cooler and oil
pipe line.
HINT:
• Spray compressed air of 196 kPa (2 kgf/cm
2, 28 psi) from the inlet hose.
• If plenty of fine powders are identified in the
ATF, add new ATF using a bucket pump and
clean it again.
(2) If the ATF is cloudy, inspect the oil cooler
(radiator).
(e) Prevent deformation of the torque converter clutch
and damage to the oil pump gear.
(1) When there is any damage on the end of the
bolt for the torque converter clutch and on the
bottom of the bolt hole, replace the bolt and the
torque converter clutch.
(2) All of the bolts must be same length.
(3) Bolts with washers must be used.
2. INSPECT DRIVE PLATE & RING GEAR SUB-
ASSEMBLY
(a) Set up a dial indicator with a roller instrument and
measure the drive plate runout.
(b) Check for damage of the ring gear.
Maximum runout:
0.20 mm (0.0079 in.)
If runout is not within specification or ring gear is
damaged, replace the drive plate.
C011090
D025368E08
C081014

AC–8AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
PROBLEM SYMPTOMS TABLE
Front A/C:
Symptom Suspected Area See page
Whole functions of the A/C system do not operateIG power source circuitAC-149
ACC power source circuitAC-152
A/C amplifierAC-253
Air Flow Control: No blower operationBlower motor circuitAC-127
A/C amplifierAC-253
Air Flow Control: No blower control Blower motor circuitAC-127
Air Flow Control: Insufficient air outBlower motor circuitAC-127
A/C amplifierAC-253
Temperature Control: Cool air does not come outVolume of refrigerantAC-168
Drive belt tension -
Refrigerant pressureAC-168
Compressor circuitAC-134
Pressure sensor circuitAC-51
Air mix control servo motor circuit (Passenger side)AC-93
Air mix control servo motor circuit (Driver side)AC-108
Air mix damper position sensor circuit (Passenger side)AC-69
Air mix damper position sensor circuit (Driver side)AC-81
Room temperature sensor circuitAC-25
Ambient temperature sensor circuitAC-28
A/C amplifierAC-253
Multiplex communication circuit (CAN)CA-7
Multiplex communication circuit (BEAN)MP-4
Temperature Control: Warm air does not come outAir mix control servo motor circuit (Passenger side)AC-93
Air mix control servo motor circuit (Driver side)AC-108
Air mix damper position sensor circuit (Passenger side)AC-69
Air mix damper position sensor circuit (Driver side)AC-81
Ambient temperature sensor circuitAC-28
Room temperature sensor circuitAC-25
Evaporator temperature sensor circuitAC-32
A/C amplifierAC-253
Heater radiatorAC-187
Multiplex communication circuit (CAN)CA-7
Multiplex communication circuit (BEAN)MP-4
Temperature Control: Output air is warmer or cooler
than the set temperature or response is slowRoom temperature sensor circuitAC-25
Ambient temperature sensor circuitAC-28
Solar sensor circuit (Passenger side)AC-42
Solar sensor circuit (Driver side)AC-64
Air mix damper position sensor circuit (Passenger side)AC-69
Air mix damper position sensor circuit (Driver side)AC-81
Air mix control servo motor circuit (Passenger side)AC-93
Air mix control servo motor circuit (Driver side)AC-108
A/C amplifierAC-253
Temperature Control: No temperature control (only
Max. cool or Max. warm)Air mix control servo motor circuit (Passenger side)AC-93
Air mix control servo motor circuit (Driver side)AC-108
Air mix damper position sensor circuit (Passenger side)
AC-69
Air mix damper position sensor circuit (Driver side)AC-81
A/C amplifierAC-253

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–9
AC
Rear A/C:
No air inlet controlAir inlet damper control servo motor circuitAC-98
Air inlet damper position sensor circuitAC-73
A/C amplifierAC-253
No air outlet controlAir outlet damper position sensor circuitAC-77
Air outlet control servo motor circuitAC-103
A/C amplifierAC-253
Engine idle up does not occur, or is continuousCompressor circuitAC-134
A/C amplifierAC-253
Displayed set temperature value does not match up
with operation of temperature control switchA/C amplifierAC-253
Brightness does not change when rheostat volume or
light control switch is turnedA/C amplifierAC-253
Unable to access the diagnosis mode A/C amplifierAC-253
DTC is not recorded. Set mode is cleared when IG
switch is turned offBack-up power source circuitAC-154
A/C amplifierAC-253
Symptom Suspected Area See page
Whole functions of the A/C system do not operateA/C amplifierAC-253
Rear air conditioning relay circuitAC-142
Rear air conditioning control panel circuitAC-139
Air Flow Control: No blower operationRear blower motor circuitAC-144
A/C amplifierAC-253
Air Flow Control: No blower controlRear blower motor circuitAC-144
A/C amplifierAC-253
Air Flow Control: Insufficient air outRear blower motor circuitAC-144
A/C amplifierAC-253
Temperature Control: Cool air does not come outVolume of refrigerantAC-168
Drive belt tension -
Refrigerant pressureAC-168
Compressor circuitAC-134
Pressure sensor circuitAC-51
Ambient temperature sensor circuitAC-28
Rear evaporator temperature sensor circuitAC-35
A/C amplifierAC-253
Temperature Control: Warm air does not come outRear air mix control servo motor circuitAC-113
Rear air mix damper position sensor circuitAC-85
Ambient temperature sensor circuitAC-28
Rear room temperature sensor circuitAC-39
Rear evaporator temperature sensor circuitAC-35
A/C amplifierAC-253
Heater radiatorAC-187
Temperature Control: Output air is warmer or cooler
than the set temperature or response is slowRear room temperature sensor circuitAC-39
Ambient temperature sensor circuitAC-28
Rear air mix damper position sensor circuitAC-85
Rear air mix control servo motor circuitAC-113
A/C amplifierAC-253
Temperature Control: No temperature control (only
Max. cool or Max. hot)Rear air mix control servo motor circuitAC-113
Rear air mix damper position sensor circuitAC-85
A/C amplifierAC-253 Symptom Suspected Area See page

AC–8AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
PROBLEM SYMPTOMS TABLE
Front A/C:
Symptom Suspected Area See page
Whole functions of the A/C system do not operateIG power source circuitAC-149
ACC power source circuitAC-152
A/C amplifierAC-253
Air Flow Control: No blower operationBlower motor circuitAC-127
A/C amplifierAC-253
Air Flow Control: No blower control Blower motor circuitAC-127
Air Flow Control: Insufficient air outBlower motor circuitAC-127
A/C amplifierAC-253
Temperature Control: Cool air does not come outVolume of refrigerantAC-168
Drive belt tension -
Refrigerant pressureAC-168
Compressor circuitAC-134
Pressure sensor circuitAC-51
Air mix control servo motor circuit (Passenger side)AC-93
Air mix control servo motor circuit (Driver side)AC-108
Air mix damper position sensor circuit (Passenger side)AC-69
Air mix damper position sensor circuit (Driver side)AC-81
Room temperature sensor circuitAC-25
Ambient temperature sensor circuitAC-28
A/C amplifierAC-253
Multiplex communication circuit (CAN)CA-7
Multiplex communication circuit (BEAN)MP-4
Temperature Control: Warm air does not come outAir mix control servo motor circuit (Passenger side)AC-93
Air mix control servo motor circuit (Driver side)AC-108
Air mix damper position sensor circuit (Passenger side)AC-69
Air mix damper position sensor circuit (Driver side)AC-81
Ambient temperature sensor circuitAC-28
Room temperature sensor circuitAC-25
Evaporator temperature sensor circuitAC-32
A/C amplifierAC-253
Heater radiatorAC-187
Multiplex communication circuit (CAN)CA-7
Multiplex communication circuit (BEAN)MP-4
Temperature Control: Output air is warmer or cooler
than the set temperature or response is slowRoom temperature sensor circuitAC-25
Ambient temperature sensor circuitAC-28
Solar sensor circuit (Passenger side)AC-42
Solar sensor circuit (Driver side)AC-64
Air mix damper position sensor circuit (Passenger side)AC-69
Air mix damper position sensor circuit (Driver side)AC-81
Air mix control servo motor circuit (Passenger side)AC-93
Air mix control servo motor circuit (Driver side)AC-108
A/C amplifierAC-253
Temperature Control: No temperature control (only
Max. cool or Max. warm)Air mix control servo motor circuit (Passenger side)AC-93
Air mix control servo motor circuit (Driver side)AC-108
Air mix damper position sensor circuit (Passenger side)
AC-69
Air mix damper position sensor circuit (Driver side)AC-81
A/C amplifierAC-253

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–9
AC
Rear A/C:
No air inlet controlAir inlet damper control servo motor circuitAC-98
Air inlet damper position sensor circuitAC-73
A/C amplifierAC-253
No air outlet controlAir outlet damper position sensor circuitAC-77
Air outlet control servo motor circuitAC-103
A/C amplifierAC-253
Engine idle up does not occur, or is continuousCompressor circuitAC-134
A/C amplifierAC-253
Displayed set temperature value does not match up
with operation of temperature control switchA/C amplifierAC-253
Brightness does not change when rheostat volume or
light control switch is turnedA/C amplifierAC-253
Unable to access the diagnosis mode A/C amplifierAC-253
DTC is not recorded. Set mode is cleared when IG
switch is turned offBack-up power source circuitAC-154
A/C amplifierAC-253
Symptom Suspected Area See page
Whole functions of the A/C system do not operateA/C amplifierAC-253
Rear air conditioning relay circuitAC-142
Rear air conditioning control panel circuitAC-139
Air Flow Control: No blower operationRear blower motor circuitAC-144
A/C amplifierAC-253
Air Flow Control: No blower controlRear blower motor circuitAC-144
A/C amplifierAC-253
Air Flow Control: Insufficient air outRear blower motor circuitAC-144
A/C amplifierAC-253
Temperature Control: Cool air does not come outVolume of refrigerantAC-168
Drive belt tension -
Refrigerant pressureAC-168
Compressor circuitAC-134
Pressure sensor circuitAC-51
Ambient temperature sensor circuitAC-28
Rear evaporator temperature sensor circuitAC-35
A/C amplifierAC-253
Temperature Control: Warm air does not come outRear air mix control servo motor circuitAC-113
Rear air mix damper position sensor circuitAC-85
Ambient temperature sensor circuitAC-28
Rear room temperature sensor circuitAC-39
Rear evaporator temperature sensor circuitAC-35
A/C amplifierAC-253
Heater radiatorAC-187
Temperature Control: Output air is warmer or cooler
than the set temperature or response is slowRear room temperature sensor circuitAC-39
Ambient temperature sensor circuitAC-28
Rear air mix damper position sensor circuitAC-85
Rear air mix control servo motor circuitAC-113
A/C amplifierAC-253
Temperature Control: No temperature control (only
Max. cool or Max. hot)Rear air mix control servo motor circuitAC-113
Rear air mix damper position sensor circuitAC-85
A/C amplifierAC-253 Symptom Suspected Area See page

AIR CONDITIONING – AIR CONDITIONING UNITAC–187
AC
4. REMOVE NO. 2 AIRMIX DAMPER SERVO SUB-
ASSEMBLY (for Automatic Air Conditioning System)
(a) Remove the 3 screws and the No. 2 airmix damper
servo sub-assembly.
5. REMOVE NO. 1 HEATER CLAMP
(a) Release the 4 claw fittings and remove the No. 1
heater clamp.
6. REMOVE NO. 3 AIR CONDITIONING RADIATOR
BRACKET
(a) Remove the screw and the No. 3 air conditioning
radiator bracket.
7. REMOVE HEATER RADIATOR UNIT SUB-ASSEMBLY
(a) Remove the heater radiator unit sub-assembly from
the air conditioning radiator assembly.
8. REMOVE AIR CONDITIONING TUBE ASSEMBLY
(a) Using a hexagon wrench 4.0 mm (0.15 in.), remove
the 2 hexagon bolts and the air conditioning tube
assembly.
(b) Remove the 2 O-rings from the air conditioning tube
assembly.
I035467
E145280
I035523
I035469
E146674

AC–188AIR CONDITIONING – AIR CONDITIONING UNIT
AC
9. REMOVE COOLER EXPANSION VALVE
(a) Remove the cooler expansion valve from the No. 1
cooler evaporator sub-assembly.
(b) Remove the 2 O-rings from the No. 1 cooler
evaporator sub-assembly.
10. REMOVE NO. 2 AIR CONDITIONING RADIATOR
BRACKET
(a) Remove the 2 screws and the No. 2 air conditioning
radiator bracket.
11. REMOVE NO. 1 AIR CONDITIONING RADIATOR
BRACKET
(a) Remove the 3 screws and the No .1 air conditioning
radiator bracket.
12. REMOVE NO. 4 AIR CONDITIONING RADIATOR
BRACKET
(a) Remove the No. 4 air conditioning radiator bracket.
I033483
I036016E01
I035521
I035845
I035524

AC–206AIR CONDITIONING – BLOWER UNIT (for Rear Air Conditioning System)
AC
DISASSEMBLY
1. REMOVE COOLER THERMISTOR NO.1 (for
Automatic Air Conditioning System)
(a) Disengage the 2 claw fittings and the clamp and
remove the cooler thermistor No. 1.
2. REMOVE COOLING UNIT MOTOR SUB-ASSEMBLY
WITH FAN
(a) Remove the 3 screws and the cooling unit motor
sub-assembly w/ fan.
3. REMOVE BLOWER RESISTOR TRANSISTOR
ASSEMBLY
(a) Remove the 2 screws and the blower resistor
transistor assembly.
4. REMOVE HEATER RADIATOR UNIT SUB-ASSEMBLY
(a) Disengage the claw fitting and remove the 3 screws
and blower case.
(b) Remove the 2 screws and the 2 clamps.
I035490E01
I044285
I035492
I035497E01
E055396

AIR CONDITIONING – BLOWER UNIT (for Rear Air Conditioning System)AC–207
AC
(c) Remove the 3 screws and the heater water valve
assembly.
(d) Remove the 2 O-rings from the heater water valve
assembly.
(e) Remove the heater radiator unit sub-assembly from
the air conditioning blower assembly.
REASSEMBLY
1. INSTALL HEATER RADIATOR UNIT SUB-ASSEMBLY
(a) Install the heater radiator unit sub-assembly to the
air conditioning blower assembly.
(b) Install the 2 O-rings to the heater water valve
assembly.
(c) Install the 3 screws and the heater water valve
assembly.
(d) Install the 2 screws and the 2 clamps.
E055397
E062465
E062465
E055397
E055396

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