{"model":"mk2","model_name":"MK2 Supra","vehicle":"Toyota Supra A60 (1982–1986, 5M-GE)","document":"Repair Manual","section":"FI","section_name":"EFI System","page":43,"pages_in_section":80,"title":"EFI System","section_header":"EFI System — Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter","ocr_text":"EFI SYSTEM — Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter    FI-43\n\nNo.    Terminal    Trouble    Condition    STD Voltage\n8    ISC₁ – ISC₄ — E₁    No voltage    Ignition switch ON    9 — 14V\n\n[CIRCUIT DIAGRAM showing Battery, Fusible Link, Fuse, No. 1 Main Relay, ISC Valve, ECU with terminals ISC₁, ISC₂, ISC₃, ISC₄, +IG S/W, +B, M-REL, E₁]\n\n[DIAGRAM 1] \nVoltmeter connected between ISC₁ (ECU) and E₁, showing ISC₂, ISC₃, ISC₄\nFI070\n\n① There is no voltage between ECU terminals ISC₁ — ISC₄ and E₁. (IG S/W ON)\n\n[DIAGRAM 2]\nVoltmeter connected to ECU terminal +B\nFI076\n\n② Check that there is voltage between ECU terminal +B and body ground. (IG S/W ON)\nNO    OK\n↓    ↓\nCheck wiring between computer terminal E₁ and body ground.\nOK    BAD\n↓    ↓\nTry another ECU.    Repair or replace\n↓\nRefer to No. 1.    NO → Repair or replace\nOK\n↓\nCheck wiring between NO. 1 main relay and battery.    BAD → Repair or replace\nOK\n↓\n③ Check ISC valve.\n\n[DIAGRAM 3]\nDrawing of ISC valve showing terminals S₁, S₂, S₃, S₄, B₁, B₂ connected to battery\nFI077","image":"https://tsrm.sasquatchvc.com/images/mk2/FI/FI_043.png","url":"https://tsrm.sasquatchvc.com/mk2/tsrm/FI/43","prev":{"page":42,"url":"https://tsrm.sasquatchvc.com/mk2/tsrm/FI/42","api":"https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/42"},"next":{"page":44,"url":"https://tsrm.sasquatchvc.com/mk2/tsrm/FI/44","api":"https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/44"},"section_url":"https://tsrm.sasquatchvc.com/mk2/tsrm/FI","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/1","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/2","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/3","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/4","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/5","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/6","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/7","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/8","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/9","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/10","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/11","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/12","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/13","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/14","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/15","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/16","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/17","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/18","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/19","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/20","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/21","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/22","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/23","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/24","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/25","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/26","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/27","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/28","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/29","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/30","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/31","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/32","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/33","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/34","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/35","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/36","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/37","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/38","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/39","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/40","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/41","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/42","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/43","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/44","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/45","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/46","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/47","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/48","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/49","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/50","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/51","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/52","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/53","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/54","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/55","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/56","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/57","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/58","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/59","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/60","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/61","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/62","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/63","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/64","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/65","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/66","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/67","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/68","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/69","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/70","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/71","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/72","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/73","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/74","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/75","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/76","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/77","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/78","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/79","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/FI/80"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}