2001 TOYOTA AVALON Service Repair Manual

I12940
1
23 4
AC100-03
Z13470
Magnetic clutch control
Low pressure side
ON (Continuity)
196 kpa
(2.0 kgf/cm
2, 28 psi)
OFF (No Continuity)High pressure side
3,140 kpa
(32.0 kgf/cm2, 455 psi)
OFF (No Continuity)
Z13471
Cooling fan control
ON1,520 kpa
(15.5 kgf/cm
2, 220 psi)
(No Continuity) (Continuity)
OFF
1,226 kpa
(12.5 kgf/cm
2, 178 psi)
- AIR CONDITIONINGPRESSURE SWITCH
AC-65
1987 Author
: Date
:
2001 AVALON (RM808U)
PRESSURE SWITCH
ON-VEHICLE INSPECTION
1. SET ON MANIFOLD GAUGE SET (See page AC-20)
2. DISCONNECT CONNECTOR FROM PRESSURE
SWITCH
3. RUN ENGINE AT APPROX. 1,500 RPM
4. Magnetic clutch control:
INSPECT PRESSURE SWITCH OPERATION
(a) Connect the positive (+) lead from the ohmmeter to termi-
nal 4 and the negative (-) lead to terminal 1.
(b) Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.
If operation is not as specified, replace the pressure switch.
5. Cooling fan control:
INSPECT PRESSURE SWITCH OPERATION
(a) Connect the positive (+) lead from the ohmmeter to termi-
nal 2 and the negative (-) lead to terminal 3.
(b) Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.
If operation is not as specified, replace the pressure switch.
6. STOP ENGINE AND SET OFF MANIFOLD GAUGE SET
7. CONNECT CONNECTOR TO PRESSURE SWITCH

AC101-03
I12941
AC-66
- AIR CONDITIONINGPRESSURE SWITCH
1988 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. REMOVE PRESSURE SWITCH FROM LIQUID TUBE
Disconnect the connector and remove the pressure switch.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
HINT:

Lock the switch mounted on the tube with an open end
wrench, being careful not to deform the tube and remove
the switch.

At the time of installation, please refer to the following
item.
Lubricate a new O-ring with the compressor oil and install
them to the switch.

AC102-02
- AIR CONDITIONINGPRESSURE SWITCH
AC-67
1989 Author
: Date
:
2001 AVALON (RM808U)
INSTALLATION
Installation is in the reverse order of removal (See page AC-66).

I12940
1
23 4
AC100-03
Z13470
Magnetic clutch control
Low pressure side
ON (Continuity)
196 kpa
(2.0 kgf/cm
2, 28 psi)
OFF (No Continuity)High pressure side
3,140 kpa
(32.0 kgf/cm2, 455 psi)
OFF (No Continuity)
Z13471
Cooling fan control
ON1,520 kpa
(15.5 kgf/cm
2, 220 psi)
(No Continuity) (Continuity)
OFF
1,226 kpa
(12.5 kgf/cm
2, 178 psi)
- AIR CONDITIONINGPRESSURE SWITCH
AC-65
1987 Author
: Date
:
2001 AVALON (RM808U)
PRESSURE SWITCH
ON-VEHICLE INSPECTION
1. SET ON MANIFOLD GAUGE SET (See page AC-20)
2. DISCONNECT CONNECTOR FROM PRESSURE
SWITCH
3. RUN ENGINE AT APPROX. 1,500 RPM
4. Magnetic clutch control:
INSPECT PRESSURE SWITCH OPERATION
(a) Connect the positive (+) lead from the ohmmeter to termi-
nal 4 and the negative (-) lead to terminal 1.
(b) Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.
If operation is not as specified, replace the pressure switch.
5. Cooling fan control:
INSPECT PRESSURE SWITCH OPERATION
(a) Connect the positive (+) lead from the ohmmeter to termi-
nal 2 and the negative (-) lead to terminal 3.
(b) Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.
If operation is not as specified, replace the pressure switch.
6. STOP ENGINE AND SET OFF MANIFOLD GAUGE SET
7. CONNECT CONNECTOR TO PRESSURE SWITCH

AC101-03
I12941
AC-66
- AIR CONDITIONINGPRESSURE SWITCH
1988 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. REMOVE PRESSURE SWITCH FROM LIQUID TUBE
Disconnect the connector and remove the pressure switch.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
HINT:

Lock the switch mounted on the tube with an open end
wrench, being careful not to deform the tube and remove
the switch.

At the time of installation, please refer to the following
item.
Lubricate a new O-ring with the compressor oil and install
them to the switch.

AC0YL-02
I12948
Liquid Tube
Suction Hose
Discharge Hose
10 (100, 7)
10 (100, 7)
5.4 (55, 48 in.´lbf)
5.4 (55, 48 in.´lbf)
N´m (kgf´cm, ft´lbf) : Specified torque
- AIR CONDITIONINGREFRIGERANT LINE
AC-23
1945 Author
: Date
:
2001 AVALON (RM808U)
LOCATION

AC0YK-01
AC-22
- AIR CONDITIONINGREFRIGERANT LINE
1944 Author
: Date
:
2001 AVALON (RM808U)
REFRIGERANT LINE
ON-VEHICLE INSPECTION
1. INSPECTION HOSE AND TUBE CONNECTIONS FOR LOOSENESS
2. INSPECT HOSES AND TUBES FOR LEAKAGE
Using a gas leak detector, check for leakage of refrigerant.

AC0YM-02
AC-24
- AIR CONDITIONINGREFRIGERANT LINE
1946 Author
: Date
:
2001 AVALON (RM808U)
REPLACEMENT
1. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM
2. REPLACE FAULTY TUBE OR HOSE
NOTICE:
Cap the open fittings immediately to keep moisture or dirt out of the system.
3. TIGHTEN JOINT OF BOLT OR NUT TO SPECIFIED TORQUE
NOTICE:
Connections should not be torqued tighter than the specified torqued.
Part tightenedN´mkgf´cmft´lbf
Condenser x Discharge hose5.45548 in.´lbf
Condenser x Liquid tube5.45548 in.´lbf
Compressor x Discharge hose101007
Compressor x Suction hose101007
Expansion valve x Evaporator5.45548 in.´lbf
Suction line (Block joint)101007
Liquid line (Block joint)101007
4. EVACUATE AIR IN REFRIGERATION SYSTEM AND CHARGE SYSTEM WITH REFRIGERANT
Specified amount: 600 ± 50g (21.16 ± 1.76 oz.)
5. INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak detector, check for leakage of refrigerant.
6. INSPECT A/C OPERATION