TOYOTA CAMRY V20 1986 Service Information

WATER TEMPERATURE SWITCH
All±Trae/4WD Model
INSPECT SWITCH CONTINUITY
Inspect the switch continuity.
If detective, replace the water temperature
switch.If continuity is not as specified, replace the
relay. All±Trac/4WD Model
(A/C Cut Relay)
Apply battery voltage to
terminal 1 and 2Terminals
Condition
Constant
± AIR CONDITIONING SYSTEMRelaysAC±38

WATER TEMPERATURE SWITCH
All±Trae/4WD Model
INSPECT SWITCH CONTINUITY
Inspect the switch continuity.
If detective, replace the water temperature
switch.If continuity is not as specified, replace the
relay. All±Trac/4WD Model
(A/C Cut Relay)
Apply battery voltage to
terminal 1 and 2Terminals
Condition
Constant
± AIR CONDITIONING SYSTEMWater Temperature SwitchAC±38

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

1. REMOVEL LOWER AND UPPER UNIT CASES
(a) Discoonnect connectors
(b) Remove wire harness.
(c) Remove four clips.
(d) Remove five screws.
(e) Remove condenser fan control amplifier (2vZ±FE
E/G) or A/C cut amplifier (3S±FE E/G).
(f) Remove compressor control amplifier (2VZ±FE
E/G) or
A/C cut relay (All±Trac/4WD model).
(g) Remove upper unit case.
(h) Remove thermistor with thermistor holder.
(i) Remove lower unit case.
2. REMOVE EXPANSION VALVE
(a) Disconnect the liquid tube from the inlet fitting of the
expansion valve.
(b) Remove the packing and heat sensing tube from
suction tube of evaporator.
DISASSEMBLY OF COOLING UNIT
± AIR CONDITIONING SYSTEMCooling UnitAC±40

Evaporator
INSPECTION OF EVAPORATOR
1. CHECK EVAPORATOR FINS FOR BLOCKAGE
If the fins are clogged, clean them with compressed air.
NOTICE: Never use water to clean the evaporator.
2. CHECK FITTINGS FOR CRACKS OR SCRATCHES
Repair as necessary.
ASSEMBLY OF COOLING UNIT
INSTALL COMPONENTS ON EVAPORATOR
(a) Connect the expansion valve to the inlet fitting of the
evaporator. Torque the nut.
Torque: 230 kg±cm (16 ft±Ib, 22 N±m)
HINT: Be sure that the 0±ring are positioned on the tube
fitting.
(b) Install the holder to the suction tube with heat sensi-
tizing tube.
(c) Connect the liquid tube to the inlet fitting of the expan-
sion valve. Torque the nut.
Torque: 140 kg±cm (10 ft±Ib, 14 N±m)
(d) Install lower unit case to the evaporator.
(e) Install thermistor to the evaporator.
(f) Install upper unit case.
(g) Install four screws.
(h) Install four clips.
(i) Install wire harness.
(j) Install condenser fan control amplifier.
(k) Install compressor control amplifier.
(I) Connect connectors.
INSTALLATION OF COOLING UNIT
1. INSTALL COOLING UNIT
Install the cooling unit with three nuts and four bolts.
2. CONNECT CONNECTORS
3. INSTALL GLOVE BOX REINFORCEMENT(c) Remove the expansion valve.
± AIR CONDITIONING SYSTEMCooling UnitAC±41

Evaporator
INSPECTION OF EVAPORATOR
1. CHECK EVAPORATOR FINS FOR BLOCKAGE
If the fins are clogged, clean them with compressed air.
NOTICE: Never use water to clean the evaporator.
2. CHECK FITTINGS FOR CRACKS OR SCRATCHES
Repair as necessary.
ASSEMBLY OF COOLING UNIT
INSTALL COMPONENTS ON EVAPORATOR
(a) Connect the expansion valve to the inlet fitting of the
evaporator. Torque the nut.
Torque: 230 kg±cm (16 ft±Ib, 22 N±m)
HINT: Be sure that the 0±ring are positioned on the tube
fitting.
(b) Install the holder to the suction tube with heat sensi-
tizing tube.
(c) Connect the liquid tube to the inlet fitting of the expan-
sion valve. Torque the nut.
Torque: 140 kg±cm (10 ft±Ib, 14 N±m)
(d) Install lower unit case to the evaporator.
(e) Install thermistor to the evaporator.
(f) Install upper unit case.
(g) Install four screws.
(h) Install four clips.
(i) Install wire harness.
(j) Install condenser fan control amplifier.
(k) Install compressor control amplifier.
(I) Connect connectors.
INSTALLATION OF COOLING UNIT
1. INSTALL COOLING UNIT
Install the cooling unit with three nuts and four bolts.
2. CONNECT CONNECTORS
3. INSTALL GLOVE BOX REINFORCEMENT(c) Remove the expansion valve.
± AIR CONDITIONING SYSTEMCooling UnitAC±41

4. INSTALL GROMMETS ON INLET AND OUTLET
FITTINGS
5. CONNECT LIQUID TUBE TO COOLING UNIT INLET
FITTING
Torque the nut.
Torque: 140 kg±cm (10 ft±Ib, 14 N±m)
6. CONNECT SUCTION TUBE TO COOLING UNIT
OUTLET FITTING
Torque the nut.
Torque: 330 kg±cm (24 ft±ib, 32 N±m)
7. IF EVAPORATOR WAS REPLACED, ADD
COMPRESSOR OIL TO COMPRESSOR
Add 40 ± 50 cc (1.4 ± 1.7 fl.oz.)
Compressor oil: DENSOOIL 6,
SUNISO NO. 5GS or equivalent
8. CONNECT NEGATIVE CABLE TO BATTERY
9. EVACUATE AIR FROM AIR CONDITIONING SYSTEM
10. CHARGE AIR CONDITIONING SYSTEM WITH
REFRIGERANT AND CHECK FOR GAS LEAKAGE
Specified amount: 600 ± 700 g (1.3 ± 1.7 Ib)
REFRIGERANT LINES
(See page AC±12)
1. INSPECT HOSES AND TUBES FOR LEAKAGE
Use a gas leak detector. Replace, if necessary.
2. CHECK THAT HOSE AND TUBE CLAMPS ARE NOT
LOOSE
Tighten or replace as necessary.
REPLACEMENT OF REFRIGERANT
LINES
1. DISCHARGE REFRIGERATION SYSTEM
2. REPLACE FAULTY TUBE OR HOSE
HINT: Cap the open fitting immediately to keep moisture
out of the system.
3. TIGHTENING TORQUE FOR O±RING AND BOLTED
TYPE FITTINGS
(See page AC±12)
4. EVACUATE AIR FROM AIR CONDITIONING SYSTEM
5. CHARGE AIR CONDITIONING SYSTEM WITH
REFRIGERANT AND CHECK FOR GAS LEAKAGE
Specified amount: 600 ± 750 g (1.3 ± 1.7 Ib)
± AIR CONDITIONING SYSTEMCooling UnitAC±42

4. INSTALL GROMMETS ON INLET AND OUTLET
FITTINGS
5. CONNECT LIQUID TUBE TO COOLING UNIT INLET
FITTING
Torque the nut.
Torque: 140 kg±cm (10 ft±Ib, 14 N±m)
6. CONNECT SUCTION TUBE TO COOLING UNIT
OUTLET FITTING
Torque the nut.
Torque: 330 kg±cm (24 ft±lb, 32 N±m)
7. IF EVAPORATOR WAS REPLACED, ADD
COMPRESSOR OIL TO COMPRESSOR
Add 40 ± 50 cc (1.4 ± 1.7 fl.oz.)
Compressor oil: DENSOOIL 6,
SUNISO NO. 5GS or equivalent
8. CONNECT NEGATIVE CABLE TO BATTERY
9. EVACUATE AIR FROM AIR CONDITIONING SYSTEM
10. CHARGE AIR CONDITIONING SYSTEM WITH
REFRIGERANT AND CHECK FOR GAS LEAKAGE
Specified amount: 600 ± 700 g (1.3 ± 1.7 Ib)
REFRIGERANT LINES
(See page AC±12)
1. INSPECT HOSES AND TUBES FOR LEAKAGE
Use a gas leak detector. Replace, if necessary.
2. CHECK THAT HOSE AND TUBE CLAMPS ARE NOT
LOOSE
Tighten or replace as necessary.
REPLACEMENT OF REFRIGERANT
LINES
1. DISCHARGE REFRIGERATION SYSTEM
2. REPLACE FAULTY TUBE OR HOSE
HINT: Cap the open fitting immediately to keep moisture
out of the system.
3. TIGHTENING TORQUE FOR O±RING AND BOLTED
TYPE FITTINGS
(See page AC±12)
4. EVACUATE AIR FROM AIR CONDITIONING SYSTEM
5. CHARGE AIR CONDITIONING SYSTEM WITH
REFRIGERANT AND CHECK FOR GAS LEAKAGE
Specified amount: 600 ± 750 g (1.3 ± 1.7 Ib)
± AIR CONDITIONING SYSTEMRefrigerant LinesAC±42

THERMISTOR
(See page AC±40)
REMOVAL AND INSPECTION OF
THERMISTOR
1. DISCONNECT NEGATIVE CABLE FROM BATTERY
2. REMOVE GLOVE BOX AND UNDER COVER
3. CHECK THERMISTOR INSTALLED OPERATION
Using an ohmmeter, measure the resistance at the con-
nector.
Resistance: 1,500
at 25°C (77°F)
If resistance value is not as speci¿¿ed, replace the
thermistor.
4. REMOVE THERMISTOR
(a) Disconnect the connector.
(b) Remove the screw and thermistor from the cooling
unit.
5. CHECK THERMISTOR OPERATION
(a) Place the thermistor in cold water. While varying the
temperature of the water, measure the resistance at
the connector and at the same time, measure the tem-
perature of the water with a thermometer.
(b) Compare the two readings on the chart.
If the intersection is not between the two lines, replace the
thermistor.
INSTALLATION OF THERMISTOR
1. INSTALL THERMISTOR
(a) Install the thermistor with the screw.
(b) Connect the connector.
2. INSTALL GLOVE BOX AND UNDER COVER
3. CONNECT NEGATIVE CABLE TO BATTERY
± AIR CONDITIONING SYSTEMThermistorAC±43

HINT: When checking for continuity in circuits which
contain an LED, please observe the following in-
structions.
(a) Use a tester with a power source of 3V or greater to
overcome the circuit resistance.
(b) If a suitable tester is not available, apply battery volt-
age and check that the LED lights up.
If there is no continuity as specified, replace the A/C
switch.
4. INSTALL A/C SWITCH
5. CONNECT NEGATIVE CABLE TO BATTERY
A/C SWITCH (Push Type)
1. DISCONNECT NEGATIVE CABLE FROM BATTERY
2. REMOVE HEATER CONTROL ASSEMBLY
3. DISCONNECT HEATER CONTROL CONNECTOR
4. CHECK A/C SWITCH CONTINUITY
Using an ohmmeter, check continuity between the termi-
nals for each switch position as shown in the table.
AC SWITCH (Lever Type)
(See page AC±12)
ON±VEHICLE INSPECTION
1. DISCONNECT NEGATIVE CABLE FROM BATTERY
2. REMOVE A/C SWITCH
3. CHECK A/C SWITCH FOR CONTINUITY
Using an ohmmeter, check continuity between the termi-
nals for each switch position as shown in the table.
If there in no continuity as specified, replace the A/C
switch.
5. CONNECT HEATER CONTROL CONNECTOR
6. INSTALL HEATER CONTROL ASSEMBLY
7. CONNECT NEGATIVE CABLE TO BATTERYSwitch position
Switch positionIllumination
Terminal
Terminal
A/C
A/C
OFFOFF
± AIR CONDITIONING SYSTEMA C SwitchAC±44