Page 50 of 1897
AC1N4-02
N20259
(A)
(B)
AC-50
- AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
1972 Author: Date:
2001 AVALON (RM808U)
INSTALLATION
1. INSTALL COMPRESSOR
(a) Install the compressor with 3 nuts.
Torque: 25 N´m (250 kgf´cm, 18 ft´lbf)
(b) Install the generator drive belt adjusting bar bracket with
2 bolts and a nut.
Torque:
Bolt (A): 18 N´m (185 kgf´cm, 13 ft´lbf)
Bolt (B): 25 N´m (250 kgf´cm, 18 ft´lbf)
Nut: 25 N´m (250 kgf´cm, 18 ft´lbf)
2. INSTALL GENERATOR
(a) Mount generator on the generator bracket with the pivot
bolt and adjusting lock bolt. Do not tighten the bolts yet.
(b) Connect the generator connector.
(c) Connect the generator wire with the nut.
3. CONNECT DISCHARGE AND SUCTION HOSES
Connect both hoses with the bolt and nut.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
NOTICE:
Hoses should be connected immediately after the caps
have been removed.
HINT:
Lubricate 2 new O-ring with compressor oil and install them to
the tube.
4. INSTALL AND CHECK DRIVE BELT
(See page AC-19, AC-17)
5. CONNECT NEGATIVE (-) TERMINAL CABLE TO BAT-
TERY
6. EVACUATE AIR FROM REFRIGERATION SYSTEM
AND CHARGE WITH REFRIGERANT
Specified amount: 600 ± 50 g (21.16 ± 1.76 oz.)
7. INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak detector, check for leakage of refrigerant.
If there is leakage, check the tightening torque at the joints.
8. INSPECT A/C OPERATION
Page 51 of 1897
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.
Page 53 of 1897
AC1N1-02
I12935
P19978
N20259
AC-44
- AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
1966 Author: Date:
2001 AVALON (RM808U)
REMOVAL
1. RUN ENGINE AT IDLE SPEED WITH A/C ON FOR
APPROX. 10 MINUTES
2. STOP ENGINE
3. DISCONNECT NEGATIVE (- ) TERMINAL CABLE
FROM BATTERY
4. DISCHARGE REFRIGERANT FROM REFRIGERATION
SYSTEM
5. REMOVE DRIVE BELT
(See page AC-18)
6. DISCONNECT DISCHARGE AND SUCTION HOSES
Remove the 2 nuts and disconnect the both hoses.
NOTICE:
Cap the open fittings immediately to keep moisture or dirt
out of the system.
7. REMOVE GENERATOR
(a) Disconnect the generator connector.
(b) Remove the nut, and disconnect the generator wire.
(c) Disconnect the wire harness from the clamp.
(d) Remove the pivot bolt, adjusting lock bolt and generator.
8. REMOVE COMPRESSOR
(a) Disconnect the connector.
(b) Disconnect the wire harness clamp.
(c) Remove the 2 bolts, nut and drive belt adjusting bar
bracket.
Page 55 of 1897
I12944
No. 2 Cooling
Fan Relay
AC20V-02
I12945
No. 3 Cooling
Fan Relay
N23635
35
4 1 2
I05027
5
12
3
1 3
2 5
AC-70
- AIR CONDITIONINGCOOLING FAN RELAY
1992 Author: Date:
2001 AVALON (RM808U)
COOLING FAN RELAY
INSPECTION
1. REMOVE NO. 2 COOLING FAN RELAY FROM RELAY
BLOCK NO. 8
2. REMOVE NO. 3 COOLING FAN RELAY FROM RELAY
BLOCK NO. 8
3. INSPECT NO. 2 COOLING FAN RELAY
(Marking: A.C FAN NO. 2) CONTINUITY
ConditionTester connectionSpecified condition
Constant1 - 2
3 - 4Continuity
Apply B+ between
terminals 1 and 2.3 - 5Continuity
If continuity is not as specified, replace the relay.
4. INSPECT NO. 3 COOLING FAN RELAY
(Marking: A.C FAN NO. 3) CONTINUITY
ConditionTester connectionSpecified condition
Constant1 - 2Continuity
Apply B+ between
terminals 1 and 2.3 - 5Continuity
If continuity is not as specified, replace the relay.
Page 58 of 1897
AC2G5-01
- AIR CONDITIONINGCONDENSER
AC-51
1973 Author: Date:
2001 AVALON (RM808U)
CONDENSER
ON-VEHICLE INSPECTION
1. INSPECT CONDENSER FINS FOR BLOCKAGE OR DAMAGE
If the fins are clogged, wash them with water and dry with compressed air.
NOTICE:
Be careful not to damage the fins.
If the fins are bent, straighten them with a screwdriver or pliers.
2. INSPECT CONDENSER AND FITTING FOR LEAKAGE
Using a gas leak detector, check for leakage.
If there is leakage, check the tightening torque at the joints.
Page 63 of 1897
AC2FW-01
P00763
Pivot Bolt
Adjusting Lock Bolt
- AIR CONDITIONINGDRIVE BELT
AC-19
1941 Author: Date:
2001 AVALON (RM808U)
INSTALLATION
INSTALL DRIVE BELT
(a) Install the drive belt.
(b) Apply drive belt tension by adjusting bolt.
Drive belt tension:
New belt: 165 ± 22 lbf
Used belt: 110 ± 22 lbf
(c) Tighten the adjusting lock bolt and pivot bolt.
Torque:
Pivot bolt: 56 N´m (570 kgf´cm, 41 ft´lbf)
Adjusting lock bolt: 18 N´m (185 kgf´cm, 13 ft´lbf)
Page 65 of 1897
AC0YG-03
P00763
Pivot Bolt
Adjusting Lock Bolt
AC-18
- AIR CONDITIONINGDRIVE BELT
1940 Author: Date:
2001 AVALON (RM808U)
REMOVAL
REMOVE DRIVE BELT
(a) Loosen the pivot bolt and adjusting lock nut.
(b) Loosen the drive belt tension by adjusting bolt and re-
move the drive belt.
Page 78 of 1897
AC0YJ-02
N06553
- AIR CONDITIONINGMANIFOLD GAUGE SET
AC-21
1943 Author: Date:
2001 AVALON (RM808U)
SET OFF
1. CLOSE BOTH HAND VALVES OF MANIFOLD GAUGE
SET
2. DISCONNECT QUICK DISCONNECT ADAPTERS
FROM SERVICE VALVES ON REFRIGERANT LINE
HINT:
Slide the sleeve of the quick disconnect adapter upward to un-
lock the adapter and remove it from the service valve.
3. INSTALL CAPS TO SERVICE VALVES ON REFRIGER-
ANT LINE
