check engine TOYOTA CAMRY V20 1986 Service Information

(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

Checking of Refrigeration System with Manifold Gauge
This is a method in which the trouble is located by using a manifold gauge. Read the manifold gauge
pressure when the following conditions are established:
(a) Temperature at the air inlet is 30 ± 35
°C (86 ± 95°F)
(b) Engine running at 1,500 rpm
(e) Blower fan speed switch set at high speed
(d) Temperature control lever set at cool side
HINT: It should be noted that the gauge indications may vary slightly due to ambient temperature condi±
tions.
NORMALLY FUNCTIONING
REFRIGERATION SYSTEM
Gauge reading:
Low pressure side
1.5 ± 2.0 kg/cm
2
(21 ± 28 psi, 147 ± 196 kPa)
High pressure side
14.5 ± 15.0 kg /cm
2
(206 ± 213 psi, 1,422±1,471 kPa
Each pointer of manifold gauge
point to position A
Expansion valve improperly mounted, heat
sensing tube defective (opens too wide)
Does not coo! (cools from time to time in
some cases) Refrigerant overcharge or insufficient
cooling of condenserMoisture present in refrigeration system
Periodically cools and then fails to cool
Air present in refrigeration systemPoor circulation of refrigerant
Refrigerant does not circulateDoes not cool sufficiently
Does not cool sufficiently
Insufficient compressionInsufficient refrigerantPosition of Pointers
Insufficient cooling Insufficient cooling
Insufficient cooling
Low is D
High is OBetween A and B
Does not coolCondition Trouble
± AIR CONDITIONING SYSTEMTroubleshootingAC±18

HINT:
wºNew beltº refer to a belt which has been used less
than
5 minutes on a running engine.
wºUsed beltº refer to a belt which has been used on a
running engine for 5 minutes or more.
wAfter installing the drive belt, check that it fits properly
i n the ribbed grooves.
4. START ENGINE
5. TURN ON A/C SWITCH
Check that the A/C operates at each position of the blower
switch.
6. CHECK MAGNETIC CLUTCH OPERATION
If magnetic clutch does not engage, check the A/C fuse.
7. CHECK THAT IDLE INCREASES
When the magnetic clutch engages, engine revolution
should increase.
Standard idle±up rpm:
ON±VEHICLE INSPECTION
1. CHECK CONDENSER FINS FOR BLOCKAGE OR
DAMAGE
If the fins are clogged, clean them with pressurized water.
NOTICE: Be careful not to damage the fins.
2. MAKE SURE THAT DRIVE BELT IS INSTALLED
CORRECTLY
Check that the drive belt tits properly in the ribbed
grooves.
3. CHECK DRIVE BELT TENSION
Using a belt tension gauge, check the drive belt tension.
Belt tension gauge:
Nippondenso BTG±20 (95506±00020) or
Borroughs No. BT±33±73F
Drive belt tension
Standard idle±up rpm:Used Belt New Belt
Engine
Engine2¿¿±FE
2VZ±FE
3S±FE3S±FE
± AIR CONDITIONING SYSTEMOn±vehicle InspectionAC±21

8. CHECK CONDENSER FAN MOTOR ROTATES
9. CHECK AMOUNT OF REFRIGERANT
If you can see bubbles in the sight glass, additional refrig-
erant is needed.
(See page AC±22)
10. IF NO COOLING OR IT IS INSUFFICIENT, INSPECT
FOR LEAKAGE
Using a gas leak tester, inspect each component of the re-
frigeration system.
REFRIGERATION SYSTEM
Checking of Refrigerant Volume
1. RUN ENGINE AT APPROX. 1,500 RPM
2. OPERATE AIR CONDITIONER AT MAXIMUM
COOLING FOR A FEW MINUTES
3. CHECK AMOUNT OF REFRIGERANT
Observe the sight glass on the receiver.
Immediately after the air conditioner is
turned off, refrigerant in sight glass stays
clear
When the air conditioner is turned off,
refrigerant foams and then stays clearEvacuate and charge system.
Then check for leak with gas leak
detector
Temperature between compressor inlet
and outlet is noticeably different
Discharge the excess refrigerant to
specified amount No temperature difference between
compressor inlet and outletCheck for leak with gas leak
tester
No bubbles present in sight glassBubbles present in sight glass
Empty, proper or too much Empty, proper or too muchAmount of refrigerant
Empty or nearly empty
Refer to items 5 and 6
Refer to items 3 and 4Refer to items 3 and 4
Proper or too muchInsufficient Symptom
Too muchRemedy. Item
± AIR CONDITIONING SYSTEMOn±Vehicle InspectionAC±22

8. CHECK CONDENSER FAN MOTOR ROTATES
9. CHECK AMOUNT OF REFRIGERANT
If you can see bubbles in the sight glass, additional refrig-
erant is needed.
(See page AC±22)
10. IF NO COOLING OR IT IS INSUFFICIENT, INSPECT
FOR LEAKAGE
Using a gas leak tester, inspect each component of the re-
frigeration system.
REFRIGERATION SYSTEM
Checking of Refrigerant Volume
1. RUN ENGINE AT APPROX. 1,500 RPM
2. OPERATE AIR CONDITIONER AT MAXIMUM
COOLING FOR A FEW MINUTES
3. CHECK AMOUNT OF REFRIGERANT
Observe the sight glass on the receiver.
Immediately after the air conditioner is
turned off, refrigerant in sight glass stays
clear
When the air conditioner is turned off,
refrigerant foams and then stays clearEvacuate and charge system.
Then check for leak with gas leak
detector
Temperature between compressor inlet
and outlet is noticeably different
Discharge the excess refrigerant to
specified amount No temperature difference between
compressor inlet and outletCheck for leak with gas leak
tester
No bubbles present in sight glassBubbles present in sight glass
Empty, proper or too much Empty, proper or too muchAmount of refrigerant
Empty or nearly empty
Refer to items 5 and 6
Refer to items 3 and 4Refer to items 3 and 4
Proper or too muchInsufficient Symptom
Too muchRemedy. Item
± AIR CONDITIONING SYSTEMRefrigeration SystemAC±22

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

INSTALLATION OF COMPRESSOR
(See page AC±25)
1. INSTALL COMPRESSOR WITH FOUR MOUNTING
BOLTS
Torque:
3S±FE engine 280 kg±cm (20 ft±lb, 27 N±m)
2VZ±FE engine 250 kg±cm (18 ft±lb, 25 N±m)
2. INS TALL DRIV E BE LT(S e e ste ps 2 and 3 on pa ge
AC±21)
3. CONNECT TWO HOSES TO COMPRESSOR SERVICE
VALVES
Torque:
Discharge line 250 kg±cm (18 ft±lb, 25 N±m)
Suction line 250 kg±cm (18 ft±lb, 25 N±m)
4. CONNECT CLUTCH LEAD WIRE TO WIRING
HARNESS
5. (2VZ±FE ENGINE MODEL)
PLACE CONDENSER FAN, RADIATOR FAN AND
IGNITOR BRAKET
6. INSTALL BATTERY AND CONNECT NEGATIVE CABLE
TO BATTERY
7. EVACUATE AIR FROM AIR CONDITIONING SYSTEM
8. CHARGE AIR CONDITIONING SYSTEM WITH
REFRIGERANT AND CHECK FOR GAS LEAKAGE
Specified amount: 600 ± 750 g (1.3 ± 1.7 lb)
± AIR CONDITIONING SYSTEMCompressorAC±31

CONDENSER FAN MOTOR
INSPECTION ON FAN MOTORS
1. CHECK OPERATION OF FAN MOTOR
HINT: The fan motor operates at two speeds depending
on the water temperature and the A/C switch.
3S±FE Engine Model
90°C (194°F) or above or
the refrigerant pressure is
approx. 15.5 kg/cm
2
(220 psi, 1,520 kPa) or
greater 90°C (194°F) or below
90°C (194°F) or above
90°C (194°F) or below Water Temperature
Fan Motor
Speed Magnetic
Clutch A/C
Switch
High
HighLowOff
± AIR CONDITIONING SYSTEMCondenser Fan MotorAC±34

REMOVAL OF COOLING UNIT
1. DISCONNECT NEGATIVE CABLE FROM BATTERY
2. DISCHARGE REFRIGERATION SYSTEM
3. DISCONNECT SUCTION TUBE FROM COOLING UNIT
OUTLET FITTING
4. DISCONNECT LIQUID TUBE FROM COOLING UNIT
INLET FITTING
HINT: Cap the open fittings immediately to keep moisture
out of the system.
5. REMOVE GROMMETS FROM INLET AND OUTLET
FITTINGS
6. REMOVE GLOVE BOX
7. DISCONNECT CONNECTORS
8. REMOVE COOLING UNIT
Remove three nuts and four bolts.
COOLING UNIT
(See page AC±12)
ON±VEHICLE INSPECTION OF
EXPANSION VALVE
1. CHECK QUANTITY OF REFRIGERANT GAS DURING
REFRIGERATION CYCLE
2. INSTALL MANIFOLD GAUGE SET
(See page AC±23)
3. RUN ENGINE
Run the engine at 2.000 rpm at least 5 minutes.
4. CHECK EXPANSION VALVE
If the expansion valve is clogged,the low pressure reading
will drop to 0 kg/cm2 (0 psi, 0 kPa), otherwise it is OK.
± AIR CONDITIONING SYSTEMCooling UnitAC±39