1986 TOYOTA CAMRY V20 charging

GENERAL INFORMATION
1. WHEN HANDLING REFRIGERANT (R±12),
FOLLOWING PRECAUTIONS MUST BE OBSERVED.
(a) Do not handle refrigerant in an enclosed area or near
an open flame.
(b) Always wear eye protection.
(e) Be careful that liquid refrigerant does not get in your
eyes or on your skin.
If liquid refrigerant gets in your eyes on your skin;
wDo not rub.
wWash the area with a lot of cool water
wApply clean petroleum jelly to the skin.
wGo immediately to a physician or hospital for
professional treatment.
wDo not attempt to treat yourself.
(d) Discharge refrigerant from the charging valve before
installing the new compressor.
If the refrigerant is not discharged first, compressor oil will
spray out with the refrigerant gas when the plug is r
moved.
(e) Do not use a burner for bending or lengthening opera-
tions on tubes.
If tubes are heated with a burner, a layer of oxidation forms
inside the tube, causing the same kind of trouble as an ac±
cumulation of dust.
3. WHEN TIGHTENING CONNECTING PARTS;
(a) Apply a few drops of compressor oil to O±ring fittings
for easy tightening and to prevent leaking of refriger-
ant gas.
(b) Tighten the nut using two wrenches to avoid twisting
the tube. 2. WHEN REPLACEiNG PARTS ON REFRIGERANT LINE;
(a) Discharge refrigerant slowly before replacement.
(b) Insert a plug immediately in disconnected parts to
prevent entry of moisture and dust.
(c) Do not leave a new condenser or receiver, etc., lying
around with the plug removed.
± AIR CONDITIONING SYSTEMGeneral InformationAC±2

(e) Tighten the O±ring fittings or the bolted type fittings to
the specified torque.
4. WHEN CONNECTING MANIFOLD GAUGE;
(a) Be sure to connect the charging hose end with a pin
to the compressor charging valve.
(b) The letter ºDº engraved near the compressor service
valve indicates the high pressure side, and ºSº indi-
cates the low pressure side. Pay careful attention
when connecting the hose.
(c) Tighten hose by hand.
(d) To prevent loosening of connected hose, do not apply
drops of compressor oil to the seat of connection.
HINT: After connecting the manifold gauge and the refrig±
erant container (service can), discharge any air in the
hoses.
5. WHEN EVACUATING;
Approx. 15 minutes after removal, check the system for
leaks, then take at least another 15 minutes to make sure
the air is fully removed.
6. WHEN HANDLING REFRIGERANT CONTAINER
(SERVICE CAN);
(a) Must never be heated.
(b) Must be kept below 4

°C (1 04°F).
(c) If warming service can with hot water, be careful that
the valve on top of the service can is never immersed
in the water, as the water may permeate into the refrig-
erant cycle.
(d) Empty service cans must never be re±used.
7. WHEN A/C IS ON AND REFRIGERANT GAS IS
BEING REPLENISHED;
(a) If there is not enough refrigerant gas in the refrigerant
cycle, oil lubrication becomes insufficient and com-
pressor burnout may occur, so take care to avoid this.
(b) If the valve on the high pressure side is opened, refrig-
erant flows in reverse and causes the service can to
rupture, so only open and close the vlave on the low
pressure side.
(c) If the service can is inverted and refrigerant is inserted
in a liquid state, the liquid is compressed and the com-
pressor brakes down, so the refrigerant must be in-
serted in a g¿¿seous state.
(d) Be careful not to insert too much refrigerant gas, as
this causes trouble such as inadequate cooling, poor
fuel economy, engine overheat, etc.
8. WHEN USING GAS±CYLINDER TYPE LEAK
DETECTION INSTRUMENT;
(a) As a naked flame is used, first make sure that there are
no flammable substances nearby before using it.
(b) Be careful, as poisonous gas is produced when
refrigerant gas comes in contact with heat parts.
± AIR CONDITIONING SYSTEMGenera! InformationAC±3

Discharging of Refrigeration System
Evacuating and Charging of
Refrigeration System
(See Air Conditioning Fundamentals and Repairs Pub. No.
36950E)
Condenser clogged
Drive belt slipping
Magnetic clutch faulty
Compressor faulty
Expansion valve faulty
Thermistor faulty
A/C amplifier faulty
Insufficient or too much refrigerant
Air or excessive compressor oil in
system
Receiver clogged
Water valve cable set faultyCheck condenser .
Check or replace drive belt
Check magnetic clutch
Check compressor
Check expansion valve
Check thermistor
Check amplifier
Check refrigerant volume
Evacuate and charge system
Evaporator clogged or frosted
Air leakage from cooling unit or air duct
Air inlet blocked
Blower motor faulty
A/C amplifier faulty
Drive belt slipping
Revolution detecting sensor faulty
(w/Power steering)
A/C amplifier faultyAC±33
AC±21
AC±23
AC±23
AC±39
AC±43
AC±45 to 47
AC±22
Repair as necessary
Replace blower motor
Check amplifierClean evaporator fins or filters
Repair as necessary
Check or replace drive belt
Check sensor
Check receiver
Reset water valve cable
A/C switch
indicator
flashingInsufficient
velocity of cool
airAC±41
AC±39 to 42 Insufficient
cooling
Check amplifier Possible cause
AC±21
AC±24AC±32
BE±79
AC±39 to 42
AC±45 to 47
AC±45 to 47 Remedy ProblemPage
± AIR CONDITIONING SYSTEMTroubleshooting Refrigeration SystemAC±17

COMPRESSOR
ON±VEHICLE INSPECTION
1. INSTALL MANIFOLD GAUGE SET
(See page AC±23)
2. RUN ENGINE AT APPROX. 1,500 RPM
3. CHECK COMPRESSOR FOR FOLLOWING:
(1) High pressure gauge reading is not lower and low
pressure gauge reading is not higher than normal.
(b) Metallic sound
(e) Leakage from shaft seal
If defects are found, repair the compressor.
4. CHECK MAGNETIC CLUTCH
(a) Inspect the pressure plate, and the rotor for signs of
oil.
(b) Check the clutch bearings for noise and grease leak-
age.
(e) Using an ohmmeter, measure the resistance of the
stator coil between the clutch lead wire and ground.
Standard resistance: 3.4 ± 3.8
at 20°C (68°F)
If resistance value is not as specified, replace the coil.
(d) Connect the positive (+) lead from the battery to ter-
minal 1, check that the magnetic clutch is energized.
If magnetic clutch is not energized, replace the coil.
NOTICE: Do not short positive (+) lead wire on the vehicle
by applying battery voltage.
Installation of Manifold Gauge Set
1. CLOSE BOTH HAND VALVES OF MANIFOLD GAUGE
SET
2. INSTALL CHARGING HOSES OF GAUGE SET TO
CHARGING VALVES
Connect the low pressure hose to the low pressure charg-
ing valve and the high ..pressure hose to the high pres-
sure charging valve. Tighten the hose nuts by hand.
HINT Do not apply compressor oil to the seat of the con-
nection.
± AIR CONDITIONING SYSTEMRefrigeration SystemAC±23

COMPRESSOR
ON±VEHICLE INSPECTION
1. INSTALL MANIFOLD GAUGE SET
(See page AC±23)
2. RUN ENGINE AT APPROX. 1,500 RPM
3. CHECK COMPRESSOR FOR FOLLOWING:
(1) High pressure gauge reading is not lower and low
pressure gauge reading is not higher than normal.
(b) Metallic sound
(e) Leakage from shaft seal
If defects are found, repair the compressor.
4. CHECK MAGNETIC CLUTCH
(a) Inspect the pressure plate, and the rotor for signs of
oil.
(b) Check the clutch bearings for noise and grease leak-
age.
(e) Using an ohmmeter, measure the resistance of the
stator coil between the clutch lead wire and ground.
Standard resistance: 3.4 ± 3.8
at 20°C (68°F)
If resistance value is not as specified, replace the coil.
(d) Connect the positive (+) lead from the battery to ter-
minal 1, check that the magnetic clutch is energized.
If magnetic clutch is not energized, replace the coil.
NOTICE: Do not short positive (+) lead wire on the vehicle
by applying battery voltage.
Installation of Manifold Gauge Set
1. CLOSE BOTH HAND VALVES OF MANIFOLD GAUGE
SET
2. INSTALL CHARGING HOSES OF GAUGE SET TO
CHARGING VALVES
Connect the low pressure hose to the low pressure charg-
ing valve and the high ..pressure hose to the high pres-
sure charging valve. Tighten the hose nuts by hand.
HINT Do not apply compressor oil to the seat of the con-
nection.
± AIR CONDITIONING SYSTEMCompressorAC±23

CHARGING SYSTEM
± CHARGING SYSTEMCH±1

PRECAUTIONS
1. Check that the battery cables are connected to the correct
terminals.
2. Disconnect the battery cables when the battery is given a
quick charge.
3. Do not perform tests with a high voltage insulation
resistance tester.
4. Never disconnect the battery when the engine is running.
TROUBLESHOOTING
Drive belt loose or worn
Battery cables loose, corroded or worm
Fuse blown
Fusible link blown
IC regulator or alternator faulty
Wiring faultyAdjust or replace drive belt
Repair or replace cables
Check ºENGINEº fuse
Replace fusible link
Check charging system
Repair wiring Check ºCHARGEº and ºIGNº
fuses
Replace light
Tighten loose connections
Replace IC regulator
Discharge warning
light does not go out
with engine running
(battery requires
frequent recharging) Discharge warning
light does not light
with ignition ON and
and engine not
runningLight burned out
Wiring connections loose
IC regulator faultyPossible cause
Fuse blownRemedy
Problem
CH±6
CH±4 CH±3 Page
± CHARGING SYSTEMPrecautionsCH±2

PRECAUTIONS
1. Check that the battery cables are connected to the correct
terminals.
2. Disconnect the battery cables when the battery is given a
quick charge.
3. Do not perform tests with a high voltage insulation
resistance tester.
4. Never disconnect the battery when the engine is running.
TROUBLESHOOTING
Drive belt loose or worn
Battery cables loose, corroded or worm
Fuse blown
Fusible link blown
IC regulator or alternator faulty
Wiring faultyAdjust or replace drive belt
Repair or replace cables
Check ºENGINEº fuse
Replace fusible link
Check charging system
Repair wiring Check ºCHARGEº and ºIGNº
fuses
Replace light
Tighten loose connections
Replace IC regulator
Discharge warning
light does not go out
with engine running
(battery requires
frequent recharging) Discharge warning
light does not light
with ignition ON and
and engine not
runningLight burned out
Wiring connections loose
IC regulator faultyPossible cause
Fuse blownRemedy
Problem
CH±6
CH±4 CH±3 Page
± CHARGING SYSTEMTroubleshootingCH±2