{"model":"mk4","model_name":"MK4 Supra","vehicle":"Toyota Supra A80 (1993–2002, 2JZ-GE / 2JZ-GTE)","document":"Repair Manual","section":"AC","section_name":"Air Conditioning","page":73,"pages_in_section":111,"title":"Poor Circulation of Refrigerant","section_header":"Air Conditioning System — Troubleshooting","ocr_text":"AC–73\n\nAIR CONDITIONING SYSTEM – TROUBLESHOOTING\n\n4. POOR CIRCULATION OF REFRIGERANT\n\nCondition: insufficient cooling\n\nN04150\n\nSymptom seen in refrigeration system | Probable cause | Diagnosis | Remedy\n• Pressure low on both low and high pressure sides\n• Frost on tubes from receiver to unit\n| • Refrigerant flow obstructed by dirt in receiver | • Receiver clogged | • Replace receiver\n\n5. REFRIGERANT DOES NOT CIRCULATE\n\nCondition: Does not cool (Cools from time to time in some cases)\n\nN04160\n\nSymptom seen in refrigeration system | Probable cause | Diagnosis | Remedy\n• Vacuum indicated on low pressure side, very low pressure indicted on high pressure side\n• Frost or dew seen on piping before and after receiver/drier or expansion valve\n| • Refrigerant flow obstructed by moisture or dirt in refrigeration system\n• Refrigerant flow ob–structed by gas leakage from expansion valve heat sensing tube\n| • Refrigerant does not circulate\n| (1) Check heat sensing tube, expansion valve and ERP\n(2) Clean out dirt inexpan–sion valve by blowing with air\n If not able to remove dirt, replace expansion valve\n(3) Replace receiver\n(4) Evacuate air and charge new refrigerant to proper amount.\n for gas leakage from heat sensing tube, re place expansion 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