{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Repair Manual","section":"AC","section_name":"Air Conditioning System","page":17,"pages_in_section":46,"title":"Checking of Refrigeration System with Manifold Gauge","section_header":"Air Conditioning System — Troubleshooting","ocr_text":"Checking of Refrigeration System with Manifold Gauge\n\nThis is a method in which the trouble is located by using a manifold gauge. Read the manifold gauge pressure with the following conditions are established:\n(a) Temperature at the air inlet is 30 — 35°C (86 — 95°F)\n(b) Engine running at 1,500 rpm\n(c) Blower fan speed switch set at high speed\n(d) Temperature control lever set at cool side\nHINT: It should be noted that the gauge indications may vary slightly due to ambient temperature conditions.\n\nNORMALLY FUNCTIONING\nREFRIGERATION SYSTEM\nGauge reading:\nLow pressure side\n1.5 — 2.0 kg/cm²\n(21 — 28 psi, 147 — 196 kPa)\nHigh pressure side\n14.5 — 15.0 kg/cm²\n(206 — 213 psi, 1,422 — 1,471 kPa)\nEach pointer of manifold gauge\npoint to position A\n\nNo. | Trouble | Condition | Position of Pointers\n1 | Moisture present in refrigeration system | Periodically cools and then fails to cool | Between A and B\n2 | Insufficient refrigerant | Insufficient cooling | C\n3 | Poor circulation of refrigerant | Insufficient cooling | C\n4 | Refrigerant overcharge or insufficient cooling of condenser | Does not cool sufficiently | D\n5 | Expansion valve improperly mounted, heat sensing tube defective (opened too wide) | Insufficient cooling | D\n6 | Air present in refrigeration system | Does not cool sufficiently | Low in D High in D'\n7 | Refrigerant does not circulate | Does not cool (Cools from time to time in some case) | E\n8 | Insufficient compression | Does not cool | F","image":"https://tsrm.sasquatchvc.com/images/mk3/AC/AC_017.png","url":"https://tsrm.sasquatchvc.com/mk3/tsrm/AC/17","prev":{"page":16,"url":"https://tsrm.sasquatchvc.com/mk3/tsrm/AC/16","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/16"},"next":{"page":18,"url":"https://tsrm.sasquatchvc.com/mk3/tsrm/AC/18","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/18"},"section_url":"https://tsrm.sasquatchvc.com/mk3/tsrm/AC","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/1","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/2","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/3","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/4","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/5","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/6","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/7","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/8","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/9","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/10","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/11","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/12","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/13","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/14","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/15","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/16","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/17","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/18","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/19","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/20","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/21","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/22","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/23","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/24","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/25","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/26","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/27","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/28","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/29","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/30","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/31","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/32","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/33","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/34","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/35","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/36","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/37","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/38","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/39","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/40","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/41","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/42","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/43","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/44","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/45","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/AC/46"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}