1995 TOYOTA SUPRA Service Repair Manual

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Page 73 of 2543

TOYOTA SUPRA 1995 Service Repair Manual 4. POOR CIRCULATION OF REFRIGERANT
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
Pressure low on both
low and high pressure
sides
Frost on tubes from
receiver to unitRefrigeran

Page 74 of 2543

TOYOTA SUPRA 1995 Service Repair Manual 6. REFRIGERANT OVERCHARGE OR INSUFFICIENT COOLING OF CONDENSER
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
(1) Clean condenser
(2) Check fan motor
operation
(3) If (1) and (2)

Page 75 of 2543

TOYOTA SUPRA 1995 Service Repair Manual 8. EXPANSION VALVE IMPROPERLY
MOUNTED/HEAT SENSING TUBE DEFECTIVE
(OPENS TOO WIDE)
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
(1) Check heat sensing tube
installed condition
(2)

Page 76 of 2543

TOYOTA SUPRA 1995 Service Repair Manual REFRIGERANT VOLUME
REFRIGERANT VOLUME INSPECTION
1. RUN ENGINE AT APPROX. 1,500 RPM
2. SET TEMPERATURE CONTROL AT MAX. COOL
3. SET BLOWER SWITCH AT ºHIº
4. SET AIR INLET CONTROL AT ºRECIRCº
5.

REFRIGERANT VOLUME
REFRIGERANT VOLUME INSPECTION
1. RUN ENGINE AT APPROX. 1,500 RPM
2. SET TEMPERATURE CONTROL AT MAX. COOL
3. SET BLOWER SWITCH AT ºHIº
4. SET AIR INLET CONTROL AT ºRECIRCº
5. TURN A/C SWITCH ON
6. FULLY OPEN DOORS
7. INSPECT AMOUNT OF REFRIGERANT
Observe the sight glass on the liquid tube.
Item Symptom Amount of refrigerant Remedy

1

Bubbles present in sight glass

Insufficient*

(1) Check for gas leakage with gas leak
tester and repair if necessary
(2) Add refrigerant until bubbles dis±
appear

2

No bubbles present in sight glass

None, sufficient or too
much
Refer to items 3 and 4

3

No temperature difference between
compressor inlet and outlet

Empty or nearly empty

(1) Check for gas leakage with gas leak
tester and repair if necessary
(2) Add refrigerant until bubbles disap-
pear

4

Temperature between compressor
inlet and outlet is noticeably different
Correct or too much
Refer to items 5 and 6

5

Immediately after air conditioning is
turned off, refrigerant in sight glass
stays clear

Too much

(1) Discharge refrigerant
(2) Evacuate air and charge proper
amount of purified refrigerant

6

When air conditioning is turned off,
refrigerant foams and then stays
clear

Correct

±±
* Bubbles in the sight glass with ambient temperatures higher
than usual can be considered normal if cooling is sufficient.
REFRIGERANT CHARGE VOLUME
Specified amount:
700 + 50 g (24.96 + 1.76 oz.)
AC±76± AIR CONDITIONING SYSTEMREFRIGERANT VOLUME

Page 77 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DRIVE BELT TENSION
DRIVE BELT TENSION INSPECTION
1. INSPECT DRIVE BELTS INSTALLATION CONDITION
Check that drive belt fits properly in the ribbed grooves.
2. INSPECT DRIVE BELT TENSION
Check that th

Page 78 of 2543

TOYOTA SUPRA 1995 Service Repair Manual REFRIGERANT LINES
TIGHTENING TORQUE OF REFRIGERATION LINES
ON±VEHICLE INSPECTION
1. INSPECT HOSES AND TUBES FOR LEAKAGE
Using a gas leak tester, check for leakage of refrigerant.
2. INSPECT HOSE AN

Page 79 of 2543

TOYOTA SUPRA 1995 Service Repair Manual REFRIGERANT LINES REPLACEMENT
1. DISCHARGE REFRIGERANT IN REFRIGERATION
SYSTEM
2. REPLACE FAULTY TUBE OR HOSE
NOTICE: To prevent the intrusion of moisture or dirt,
caps should be placed on hose or tu

Page 80 of 2543

TOYOTA SUPRA 1995 Service Repair Manual AIR CONDITIONING UNIT
AIR CONDITIONING UNIT REMOVAL
1. DISCHARGE REFRIGERANT IN REFRIGERATION
SYSTEM
INSTALLATION HINT: Evacuate air from refrigeration sys-
tem.
Charge system with the refrigerant and

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