Page 22 of 3115
I01390
Condition: Insufficient cooling
I01392
Condition: Insufficient cooling
NOTE : These gauge indica-
tions are shown when the
refrigeration system has
been opened and the refrig-
erant charged without vacu-
um purging.
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-7
2732 Author: Date:
2004 LAND CRUISER (RM1071U)
(6) Refrigerant overcharged or insufficient cooling of
condenser.
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
Pressure too high on both low
and high pressure sides
No air bubbles seen through the
sight glass even when the engine
rpm is lowered Unable to develop sufficient per-
formance due to excessive refrig-
eration system
Insufficient cooling of condenser Excessive refrigerant in
cycle " refrigerant over charged
Condenser cooling " condenser
fins clogged or cooling fan faulty
(1) Clean condenser
(2) Check cooling fan with fluid
coupling operation
(3) If (1) and (2) are in normal
state, check amount of refrigerant,
and charge proper amount of re-
frigerant
(7) Air present in refrigeration system.
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
Pressure too high on both low
and high pressure sides
The low pressure piping hot to
touch
Bubbles seen in sight glass
Air entered in refrigeration system
Air present in refrigeration sys-
tem
Insufficient vacuum purging
(1) Check compressor oil to see if
it is dirty or insufficient
(2) Evacuate air and charge new
refrigerant
Page 25 of 3115
AC2810
AC1HK-04
AC2811
N11084
Wrong Okay
HI LO HILO
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-1
2726 Author: Date:
2004 LAND CRUISER (RM1071U)
AIR CONDITIONING SYSTEM
PRECAUTION
1. DO NOT HANDLE REFRIGERANT IN AN ENCLOSED
AREA OR NEAR AN OPEN FLAME
2. ALWAYS WEAR SAFETY GLASSES FOR EYE
PROTECTION
3. AVOID YOUR EYES AND SKIN TO CONTACT WITH
LIQUID REFRIGERANT
If you get the liquid refrigerant in your eyes or on your skin:
(a) Wash out the area with lots of cold water.
CAUTION:
Do not rub your eyes or skin.
(b) Apply clean petroleum jelly to the skin.
(c) Go immediately to a physician or hospital for professional
treatment.
4. NEVER HEAT CONTAINER OR EXPOSE IT TO NAKED
FLAME
5. DO NOT DROP CONTAINER NOR APPLY PHYSICAL
SHOCKS TO IT.
6. DO NOT OPERATE COMPRESSOR WITHOUT
ENOUGH REFRIGERANT IN REFRIGERANT SYSTEM
If there is not enough refrigerant in the refrigerant system, oil lu-
brication will be insufficient and compressor burnout may occur.
To avoid this, always keep enough refrigerant in the refrigerant
system.
7. DO NOT OPEN HIGH PRESSURE MANIFOLD VALVE
WHILE COMPRESSOR IS OPERATING
If the high pressure valves opened, refrigerant flows in the re-
verse direction and could cause the charging cylinder to rup-
ture, so open and close the only low pressure valve.
8. DO NOT OVERCHARGE REFRIGERANT SYSTEM
WITH REFRIGERANT
If refrigerant is overcharged, it causes problems such as insuffi-
cient cooling, poor fuel economy, engine overheating etc.
Page 43 of 3115
AC1IP-04
I06811
I06808
- AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
AC-67
2792 Author: Date:
2004 LAND CRUISER (RM1071U)
INSTALLATION
1. INSTALL COMPRESSOR
(a) Install the compressor with 3 bolts.
Torque: 49 N´m (500 kgf´cm, 36 ft´lbf)
(b) Connect the connector.
2. INSTALL FRONT DRIVE SHAFT LH
(See page SA-33)
3. CONNECT DISCHARGE AND SUCTION HOSES
(a) Lubricate 2 new O-rings with compressor oil and install
them to the hoses.
(b) Connect the both hoses with 2 bolts.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
NOTICE:
Hose should be connected immediately after the caps have
been removed.
4. INSTALL AND CHECK DRIVE BELT
(See page AC-17 and AC-15)
5. CONNECT NEGATIVE (-) TERMINAL CABLE TO BAT-
TERY
6. EVACUATE AIR FROM REFRIGERATION SYSTEM
AND CHARGE SYSTEM WITH REFRIGERANT
Specified amount: 1,050 ± 50 g (37.03 ± 1.76 oz.)
7. INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak detector, check for leaks of the refrigerant.
If there is a leakage, check the tightening torque at the joints.
8. INSPECT A/C OPERATION
Page 44 of 3115
AC1IK-03
I068122
1
I06813
3
AC-60
- AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
2785 Author: Date:
2004 LAND CRUISER (RM1071U)
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 terminal 1 and 2.
Standard resistance:
570 - 1,050 W at 20°C (68 °F)
If resistance is not as specified, replace the compressor.
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 rotor of magnetic
clutch.
8. INSPECT MAGNETIC CLUTCH OPERATION
(a) Disconnect the connector.
(b) Connect the positive (+) lead from the battery to terminal
3 and the negative (-) lead to the body ground.
(c) Check that the magnetic clutch is energized.
If operation is not as specified, replace the magnetic clutch.
Page 47 of 3115
AC1IR-04
I24822
Radiator Grill
Engine Under Cover Condenser
Liquid Tube
O-Ring Upper Bracket
N´m (kgf´cm, ft´lbf): Specified torque
Non-reusable partLower Bracket
Center Bracket Discharge Hose
O-Ring
Engine Under Cover
10 (100, 7)
10 (100, 7)
22 (225, 16)
O-Ring
Discharge Hose
Center Bracket
Lower Bracket
A/T Oil Cooler
- AIR CONDITIONINGCONDENSER
AC-69
2794 Author: Date:
2004 LAND CRUISER (RM1071U)
COMPONENTS
Page 50 of 3115
AC1IS-04
I24817
I24818
AC-70
- AIR CONDITIONINGCONDENSER
2795 Author: Date:
2004 LAND CRUISER (RM1071U)
REMOVAL
1. DISCHARGE REFRIGERANT FROM REFRIGERATION
SYSTEM
HINT:
At the time of installation, refer to the following items evacuate
air from the refrigeration system and charge system with the re-
frigerant and inspect for leaks of the refrigerant.
Specified amount: 1,050 ± 50 g (37.03 ± 1.76 oz.)
2. REMOVE RADIATOR GRILL
3. REMOVE A/T AIR COOLED OIL COOLER
(See page AT-17)
4. REMOVE ENGINE UNDER COVER
5. REMOVE DISCHARGE TUBE
(a) Remove the bolt and disconnect the tube from the con-
denser.
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)
(b) Loosen the nut and remove the tube.
Torque: 22 N´m (225 kgf´cm, 16 ft´lbf)
NOTICE:
Cap the open fittings immediately to keep moisture or dirt
out of the system.
HINT:
At the time of installation, lubricate 2 new O-rings with com-
pressor oil and install them on the tube.
6. DISCONNECT LIQUID TUBE
Remove the bolt and disconnect the tube.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
NOTICE:
Cap the open fittings immediately to keep moisture or dirt
out of the system.
HINT:
At the time of installation, lubricate a new O-ring with compres-
sor oil and install them on the tube.
Page 51 of 3115
I24819
I06722
I24820
- AIR CONDITIONINGCONDENSER
AC-71
2796 Author: Date:
2004 LAND CRUISER (RM1071U)
7. REMOVE CONDENSER
(a) Remove the 4 bolts and the 2 upper bracket.
(b) Lift up condenser, then remove the 4 bolts and the 2 cen-
ter bracket.
(c) Remove the 2 bolts and the 2 center bracket.
(d) Remove the condenser.
HINT:
At the time of installation, please refer to the following item.
If condenser is replaced, add compressor oil to condenser.
Add: 40 - 50 cc (1.4 - 1.7 fl.oz.)
Compressor oil: ND-OIL 8 or equivalent
Page 57 of 3115
AC1LC-02
I06698
I06699
AC-76
- AIR CONDITIONINGFRONT A/C EVAPORATOR
2801 Author: Date:
2004 LAND CRUISER (RM1071U)
DISASSEMBLY
1. PULL OUT EVAPORATOR TEMPERATURE SENSOR
2. REMOVE EXPANSION VALVE
Using a hexagon wrench (5.0mm, 0.20 in.), remove the 2 bolts
and separate the expansion valve and the evaporator.
Torque: 3.4 N´m (35 kgf´cm, 30 in.´lbf)
NOTICE:
Cap the open fittings immediately to keep moisture or dirt
out of the system.
HINT:
At the time of reassembly, lubricate 4 new O-rings with com-
pressor oil and install them to the valve. If evaporator is re-
placed, add compressor oil to the evaporator.
Add: 40 cc (1.4 fl.oz.)
Compressor oil: ND-OIL8 or equivalent
