2001 TOYOTA AVALON Service Repair Manual

- AIR CONDITIONINGAIR CONDITIONING UNIT
AC-31
1953 Author
: Date
:
2001 AVALON (RM808U)
11. REMOVE EVAPORATOR
(a) Remove the 10 screws and separate the A/C unit case.
(b) Pull out the evaporator.
HINT:
At the time of reassembly, please refer to the following item.
If evaporator is replaced, add compressor oil to evaporator.
Add 40 cc (1.4 fl.oz.)
Compressor oil: ND-OIL 8 or equivalent

AC2G0-01
I03338
Sensor
Ice
10 cm
(0.39 in.)
ThermistorOhmmeter
Z04352
(W)
0 500 1,000 1,500 2,000
2,500
3,000 3,500 4,000 4,500 5,000
0510152025(°C)
32 41 50 59 68 77 (°F)
AC-32
- AIR CONDITIONINGAIR CONDITIONING UNIT
1954 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION
1. CHECK EVAPORATOR FINS FOR BLOCKAGE
If the fins are clogged, clean them with compressed air.
NOTICE:
Never use water to clean the evaporator.
2. CHECK FITTINGS FOR CRACKS OR SCRATCHES
Repair as necessary.
3. INSPECT EVAPORATOR TEMPERATURE SENSOR
(a) Place the sensor in cold water, and while changing the
temperature of water, measure resistance at the connec-
tor and at the same time, measure temperature of water
with a thermometer.
(b) Compare the 2 readings on the chart.
If resistance is not as specified, replace the thermistor.

AC0YR-02
AC-34
- AIR CONDITIONINGAIR CONDITIONING UNIT
1956 Author
: Date
:
2001 AVALON (RM808U)
INSTALLATION
Installation is in the reverse order of removal (See page AC-28).

AC2FX-01
- AIR CONDITIONINGAIR CONDITIONING UNIT
AC-25
1947 Author
: Date
:
2001 AVALON (RM808U)
AIR CONDITIONING UNIT
ON-VEHICLE INSPECTION
INSPECT FOR LEAKAGE OF REFRIGERANT
(a) Remove the glove compartment door (See page BO-90).
(b) Remove the blower resister.
(c) Using a gas leak detector, check for leakage of refrigerant.
If there is leakage, check the tightening torque at the joints or check the evaporator.

AC2HI-01
- AIR CONDITIONINGAIR CONDITIONING UNIT
AC-33
1955 Author
: Date
:
2001 AVALON (RM808U)
REASSEMBLY
Reassembly is in the reverse order of disassembly (See page AC-30).

AC2KB-01
I12289
I03838
SST
I03839
SST
Push
SSTPull
Release
Lever AC-28
- AIR CONDITIONINGAIR CONDITIONING UNIT
1950 Author
: Date
:
2001 AVALON (RM808U)
REMOVAL
1. DISCHARGE REFRIGERANT FROM REFRIGERATION
SYSTEM
HINT:
At the time of installation, please refer to the following item.
Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of refrig-
erant.
Specified amount: 600 ± 50 g (21.16 ± 1.76 oz.)
2. DRAIN ENGINE COOLANT FROM RADIATOR
HINT:
It is not necessary to drain out all coolant.
3. DISCONNECT LIQUID AND SUCTION TUBES
(a) Using SST, remove the 2 piping clamps.
SST 09870-00015 (Suction tube)
09870-00025 (Liquid tube)
(1) Insert SST to piping clamp.
HINT:
Confirm the direction of the piping clamp claw and SST using
the illustration showing on the caution label.
(2) Push down SST and release the clamp lock.
NOTICE:
Be careful not to deform the tubes, when pushing SST.
(3) Pull SST slightly and push the release lever, then re-
move the piping clamp with SST.
(4) Remove the piping clamp from SST.
(b) Disconnect the both tubes.

I06919
Disconnect the tube
using hand
Screw
Driver
Tube
I12290
I12291Hose Clip
Second Ridge
Water Hose
Heater Radiator
PipeUpper
Lower LHRH
LHRH45 ± 10°
I12292
- AIR CONDITIONINGAIR CONDITIONING UNIT
AC-29
1951 Author
: Date
:
2001 AVALON (RM808U)
NOTICE:

Do not use tools like screwdriver to remove the tube.

Cap the open fittings immediately to keep moisture or
dirt out of the system.
4. REMOVE INSTRUMENT PANEL AND REINFORCE-
MENT (See page BO-90)
5. DISCONNECT WATER HOSES FROM HEATER RA-
DIATOR PIPES
(a) Using pliers, grip the claw of the hose clip and slide the
hose clip along the hose.
(b) Disconnect the water hoses.
HINT:
At the time of installation, please refer to the following item.
Push the water hose onto the heater radiator pipe as far as se-
cond ridge on the pipe and install the hose clip.
6. REMOVE BLOWER UNIT (See page AC-37)
7. REMOVE A/C UNIT
(a) Remove the duct.
(b) Disconnect the connectors.
(c) Remove the 2 nuts and A/C unit.

I12301
AC2GB-01
I12302
- AIR CONDITIONINGAIR MIX SERVOMOTOR (Auto A/C)
AC-59
1981 Author
: Date
:
2001 AVALON (RM808U)
AIR MIX SERVOMOTOR (Auto A/C)
INSPECTION
1. Drive side:
REMOVE AIR MIX SERVOMOTOR
(a) Remove the lower No. 1 panel.
(b) Remove the lower LH panel insert.
(c) Disconnect the connector.
(d) Remove the 3 screws and the servomotor.
2. INSPECT AIR MIX DAMPER POSITION SENSOR CIR-
CUIT (See page DI-796)
3. INSPECT AIR MIX CONTROL SERVOMOTOR CIRCUIT
(See page DI-799)
4. Passenger side:
REMOVE AIR MIX SERVOMOTOR
(a) Remove the blower unit (See page AC-37).
(b) Disconnect the connector.
(c) Remove the 3 screws and the servomotor.
5. INSPECT AIR MIX DAMPER POSITION SENSOR CIR-
CUIT (See page DI-787)
6. INSPECT AIR MIX CONTROL SERVOMOTOR CIRCUIT
(See page DI-799)
7. Driver side:
INSTALL AIR MIX SERVOMOTOR
(a) Install the servomotor with the 3 screws.
(b) Connect the connector.
(c) Install the lower LH panel insert.
(d) Install the lower No. 1 panel.
8. Passenger side:
INSTALL AIR MIX SERVOMOTOR
(a) Install the servomotor with the 3 screws.
(b) Connect the connector.
(c) Install the blower unit (See page AC-37).