{"model":"mk2","model_name":"MK2 Supra","vehicle":"Toyota Supra A60 (1982–1986, 5M-GE)","document":"Repair Manual","section":"AC","section_name":"Air Conditioning System","page":4,"pages_in_section":42,"title":"Checking of Refrigeration System with Manifold Gauge","section_header":"Air Conditioning System — Troubleshooting","ocr_text":"Checking of Refrigeration System\nwith Manifold Gauge\n\nThis is a method in which the trouble is located by using a\nmanifold gauge.\nRead the manifold gauge pressure with the following\nestablished conditions:\n(a) Temperature at the air inlet is 30 — 35°C (86 — 95°F)\n(b) Engine running at 2,000 rpm\n(c) Blower speed set at high\n(d) A/C switch ON\n(e) Temperature control lever set at cool\nNOTE: It should be noted that the gauge indications may\nvary slightly due to ambient temperature conditions.\n\n1. NORMALLY FUNCTIONING REFRIGERATION\nSYSTEM\nGauge reading:\nLow pressure side 1.5 — 2.0 kg/cm²\n(21 — 28 psi, 147 — 196 kPa)\nHigh pressure side 14.5 — 15.0 kg/cm²\n(206 — 213 psi, 1,422 — 1,471 kPa)\n\n2. MOISTURE PRESENT IN REFRIGERATION SYSTEM\nCondition: Periodically cools and then fails to cool\n\nSymptom seen in\nrefrigeration system | Probable cause | Diagnosis | Remedy\n\nDuring operation, pressure\nat low pressure side some-\ntimes becomes a vacuum\nand sometimes normal | Moisture entered in refrig-\neration system freezes at\nexpansion valve orifice and\ntemporarily stops cycle, but\nnormal state is restored after\na time when the ice melts | Drier in oversaturated state\n↓\nMoisture in refrigeration\nsystem freezes at expansion\nvalve orifice and blocks\ncirculation of refrigerant | (1) Replace receiver and\ndrier\n(2) Remove moisture in\ncycle through repeated\nvacuum purging\n(3) Charge new refrigerant to\nproper amount","image":"https://tsrm.sasquatchvc.com/images/mk2/AC/AC_004.png","url":"https://tsrm.sasquatchvc.com/mk2/tsrm/AC/4","prev":{"page":3,"url":"https://tsrm.sasquatchvc.com/mk2/tsrm/AC/3","api":"https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/3"},"next":{"page":5,"url":"https://tsrm.sasquatchvc.com/mk2/tsrm/AC/5","api":"https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/5"},"section_url":"https://tsrm.sasquatchvc.com/mk2/tsrm/AC","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/1","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/2","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/3","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/4","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/5","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/6","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/7","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/8","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/9","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/10","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/11","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/12","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/13","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/14","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/15","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/16","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/17","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/18","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/19","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/20","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/21","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/22","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/23","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/24","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/25","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/26","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/27","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/28","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/29","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/30","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/31","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/32","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/33","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/34","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/35","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/36","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/37","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/38","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/39","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/40","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/41","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/AC/42"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}