{"model":"mk4","model_name":"MK4 Supra","vehicle":"Toyota Supra A80 (1993–2002, 2JZ-GE / 2JZ-GTE)","document":"Repair Manual","section":"IN","section_name":"Introduction","page":33,"pages_in_section":44,"title":"Open Circuit Check","section_header":"Introduction — How to Troubleshoot ECU Controlled Systems","ocr_text":"IN–32\n\nINTRODUCTION – HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS\n\nActual examples of the inspection method for open circuit and short circuit are explained below.\n1. OPEN CIRCUIT CHECK\nFor the open circuit in the wire harness in Fig. 1, perform \"(a) Continuity Check\" or \"(b) Voltage Check\" to locate the section.\n\nFig. 1.\nSensor C OPEN B A ECU\n1 1 1 1\n2 2 2 2\nBE4063\n\n(a) Continuity Check\n(1) Disconnect connectors (A) and (C) and measure the resistance between them.\nIn the case of Fig. 2,\nBetween terminal 1 of connector (A) and terminal 1 of connector (C) → No continuity (open)\nBetween terminal 2 of connector (A) and terminal 2 of connector (C) → Continuity\nTherefore, it is found out that there is an open circuit between terminal 1 of connector (A) and terminal 1 of connector (C).\n\nFig. 2\nSensor C B A ECU\n1 1 1\n2 2 2\nBE4064\n\n(2) Disconnect connector (B) and measure the resistance between connectors (A) and (B), (B) and (C).\nIn the case of Fig. 3,\nBetween terminal 1 of connector (A) and terminal 1 of connector (B) → Continuity\nBetween terminal 1 of connector (B) and terminal 1 of connector (C) → No Continuity (open)\nTherefore, it is found out that there is an open circuit between terminal 1 of connector (B) and terminal 1 of connector (C).\n\nFig. 3\nSensor C B B A ECU\n1 1 1\n2 2 2 2\nBE4065","image":"https://tsrm.sasquatchvc.com/images/mk4/IN/IN_033.png","url":"https://tsrm.sasquatchvc.com/mk4/tsrm/IN/33","prev":{"page":32,"url":"https://tsrm.sasquatchvc.com/mk4/tsrm/IN/32","api":"https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/32"},"next":{"page":34,"url":"https://tsrm.sasquatchvc.com/mk4/tsrm/IN/34","api":"https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/34"},"section_url":"https://tsrm.sasquatchvc.com/mk4/tsrm/IN","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/1","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/2","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/3","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/4","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/5","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/6","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/7","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/8","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/9","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/10","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/11","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/12","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/13","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/14","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/15","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/16","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/17","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/18","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/19","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/20","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/21","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/22","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/23","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/24","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/25","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/26","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/27","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/28","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/29","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/30","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/31","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/32","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/33","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/34","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/35","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/36","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/37","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/38","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/39","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/40","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/41","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/42","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/43","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/44"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}