2001 TOYOTA AVALON sensor

AC2G3-01
I12939
- +
To ºFRESHº
2
5
I12938
- +
To ºRECIRCº1
5
- AIR CONDITIONINGBLOWER UNIT
AC-39
1961 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION
1. Manual A/C:
INSPECT AIR INLET SERVOMOTOR
Inspect the servomotor operation.
(1) Connect the positive (+) lead from the battery to ter-
minal 5 and negative (-) lead to terminal 2.
(2) Check the motor arm rotates counterclockwise and
arm stops on the ºFRESHº position.
(3) Connect the positive (+) lead from the battery to ter-
minal 5 and negative (-) lead to terminal 1.
(4) Check the motor arm rotates counterclockwise and
arm stops on the ºRECIRCº position.
If operations are not as specified, replace the servomotor.
2. Auto A/C:
INSPECT AIR INLET DAMPER POSITION SENSOR
CIRCUIT (See page DI-790)
3. Auto A/C:
INSPECT AIR INLET CONTROL SERVOMOTOR CIR-
CUIT (See page DI-802)

AC2G4-01
I12297
12
I12298
3 AC-42
- AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
1964 Author
: Date
:
2001 AVALON (RM808U)
COMPRESSOR AND MAGNETIC
CLUTCH
ON-VEHICLE INSPECTION
1. INSPECT COMPRESSOR FOR METALLIC SOUND
Check there is abnormal metallic sound from the compressor
when the A/C switch is ON.
If abnormal metallic sound is heard, replace the compressor as-
sembly.
2. INSPECT REFRIGERANT PRESSURE
(See page AC-3)
3. INSPECT VISUALLY FOR LEAKAGE OF REFRIGER-
ANT
Using a gas leak detector, check for leakage of refrigerant.
If there is any leakage, replace the compressor assembly.
4. INSPECT COMPRESSOR LOCK SENSOR RESIS-
TANCE
(a) Disconnect the connector.
(b) Measure resistance between terminals 1 and 2.
Standard resistance: 65 - 125 W at 20 °C (68 °F)
If resistance is not as specified, replace the sensor.
5. CHECK FOR LEAKAGE OF GREASE FROM CLUTCH
BEARING
6. CHECK FOR SIGNS OF OIL ON PRESSURE PLATE OR
ROTOR
7. INSPECT MAGNETIC CLUTCH BEARING FOR NOISE
(a) Start engine.
(b) Check for abnormal noise from the compressor when the
A/C switch is OFF.
If abnormal noise is being emitted, replace the magnetic clutch.
8. INSPECT MAGNETIC CLUTCH OPERATION
(a) Disconnect the connector.
(b) Connect the positive (+) lead from the battery to terminal
4 and the negative (-) lead to the body ground.
(c) Check that the magnetic clutch energized.
If operation is not as specified, replace the magnetic clutch.

AC2GG-01
I12917
AC0175
Thermometer
Ice
Ohmmeter
Sensor
10 cm
(3.94 in.)
Z04352
5,000
500
0
0 4,500
4,000
3,500
3,000
2,500
2,000
1,500
1,000
51015 2025
32 41 50 59 68 77 (W)
(°C)
(°F)
AC-64
- AIR CONDITIONINGEVAPORATOR TEMPERATURE SENSOR
1986 Author
: Date
:
2001 AVALON (RM808U)
EVAPORATOR TEMPERATURE
SENSOR
INSPECTION
1. REMOVE EVAPORATOR TEMPERATURE SENSOR
(a) Remove the blower unit (See page AC-37).
(b) Remove evaporator temperature sensor.
(1) Disconnect the connector.
(2) Pull out the sensor.
2. INSPECT EVAPORATOR TEMPERATURE SENSOR
Inspect evaporator temperature sensor resistance.
(1) Place the sensor in cold water, and while changing
the temperature of the water, measure resistance at
the connector and at the same time, measure tem-
perature of the water with a thermometer.
(2) Compare the 2 readings on the chart.
If resistance value is not as specified, replace the sensor.
3. INSTALL EVAPORATOR TEMPERATURE SENSOR
(a) Install the evaporator temperature sensor.
(1) Install the sensor.
(2) Connect the connector.
(b) Install the blower unit. (See page AC-41)

AC2GE-01
I12305
AC-62
- AIR CONDITIONINGROOM TEMPERATURE SENSOR
1984 Author
: Date
:
2001 AVALON (RM808U)
ROOM TEMPERATURE SENSOR
INSPECTION
1. REMOVE ROOM TEMPERATURE SENSOR
(a) Remove the lower No. 1 panel (See page BO-90).
(b) Disconnect the connector.
(c) Remove the sensor from the aspirator hose.
2. INSPECT ROOM TEMPERATURE SENSOR CIRCUIT
(See page DI-763)
3. INSTALL ROOM TEMPERATURE SENSOR
(a) Install the sensor to the aspirator hose.
(b) Connect the connector.
(c) Install the lower No. 1 panel (See page BO-97).

I12304
AC2GD-01
- AIR CONDITIONINGSOLAR SENSOR
AC-61
1983 Author
: Date
:
2001 AVALON (RM808U)
SOLAR SENSOR
INSPECTION
1. REMOVE SOLAR SENSOR
Using a screwdriver, pull out the sensor, then disconnect
the connector.
HINT:
Tape the screwdriver tip before use.
2. INSPECT SOLAR SENSOR CIRCUIT
(See page DI-784, DI-775)
3. INSTALL SOLAR SENSOR
Install the solar sensor, then connect the connector.

AC2FV-01
- AIR CONDITIONINGTROUBLESHOOTING (Manual A/C)
AC-15
1937 Author
: Date
:
2001 AVALON (RM808U)
TROUBLESHOOTING (Manual A/C)
PROBLEM SYMPTOMS TABLE
Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely
cause of the problem. Check each part in order If necessary , replace these parts.
SymptomSuspect AreaSee page
No blower operation
2. HTR Fuse
3. Heater main relay
4. Blower motor
5. Blower resistor
6. Blower speed control switch
7. Wire harness-
AC-68
AC-56
AC-57
AC-83
-
No blower control
1. Blower motor
2. Blower resistor
3. Blower speed control switch
4. Wire harnessAC-56
AC-57
AC-83
-
No air temperature control1. Engine coolant volume
2. Heater control assembly-
AC-80
No compressor operation
1. Refrigerant volume
2. A.C Fuse
3. Magnetic clutch
4. Compressor lock sensor
5. Compressor
6. Pressure switch
7. Heater main relay
8. Blower speed control switch
9. A/C switch
10.A/C amplifier
11. Evaporator temp. sensor
12.Wire harnessAC-3
-
AC-42
AC-42
AC-42
AC-65
AC-68
AC-83
AC-83
AC-77
AC-64
-
No cool air comes out
1. Refrigerant volume
2. Refrigerant pressure
3. Drive belt
4. Magnetic clutch
5. Compressor lock sensor
6. Pressure switch
7. Evaporator temp. sensor
8. A/C switch
9. A/C amplifier
10.Heater control assembly
11. Wire harnessAC-3
AC-3
AC-17
AC-42
AC-42
AC-65
AC-64
AC-83
AC-77
AC-80
-
No engine idle-up when A/C switch ON
1. A/C amplifier
2. Idle control system
3. Wire harnessAC-77
DI-102
-
No air inlet control
1. Air inlet servomotor
2. Heater control assembly
3. Wire harnessAC-39
AC-80
-
No mode control
1. Air outlet servomotor
2. Heater control assembly
3. Wire harnessAC-60
AC-80
-

AC-16
- AIR CONDITIONINGTROUBLESHOOTING (Manual A/C)
1938 Author
: Date
:
2001 AVALON (RM808U) Blinking of A/C indicator
1. Compressor
2. Drive belt
3. Compressor lock sensor
4. A/C amplifierAC-42
AC-17
AC-42
AC-77
Brightness does not change when light control switch is turned1. Headlight and taillight system
2. Heater control assemblyBE-19
AC-80

AT3412
AX03Z-05
AX-42
- AUTOMATIC TRANSAXLEAUTOMATIC TRANSAXLE UNIT
1332 Author
: Date
:
2001 AVALON (RM808U)
INSTALLATION
1. CHECK TORQUE CONVERTER CLUTCH INSTALLA-
TION
Using a scale and a straight edge, measure the distance from
the installed surface to the transaxle housing.
Correct distance: 13.7 mm (0.539 in.) or more
2. TRANSAXLE INSTALLATION
Installation is in the reverse order of removal (See page
AX-35).
HINT:
After installation, check and inspect the following items.

Fill ATF and check fluid level (See page DI-160).

Check front wheel alignment (See page SA-4).

Do the road test (See page DI-160).

Adjust the hood (See page BO-6).
NOTICE:
w/ VSC:
After installation, perform the steering angle sensor zero
point calibration (See page DI-252).