{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Repair Manual","section":"FI","section_name":"EFI System","page":50,"pages_in_section":126,"title":"EFI System Check Procedure","section_header":"EFI System — Troubleshooting with Volt/Ohmmeter (7M-GTE)","ocr_text":"FI-50\n\nEFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GTE)\n\n[DIAGRAM: Lock sections A and B with ECU illustration]\n\nEFI SYSTEM CHECK PROCEDURE\n\nPREPARATION\n\n(a) Disconnect the connectors from the ECU.\n\n(b) Remove the locks as shown in the illustration so that the tester probe(s) can easily come in.\n\nNOTICE: Pay attention to sections \"A\" and \"B\" in the illustration which can be easily broken.\n\n(c) Reconnect the connectors to the ECU.\n\nHINT:\n• Perform all voltage measurements with the connectors connected.\n• Verify that the battery voltage is 11 V or more when the ignition switch is in \"ON\" position.\n\nUsing a voltmeter with high impedance (10 kΩ/V minimum), measure the voltage at each terminal of the wiring connectors.\n\nTerminals of ECU\n\n[TABLE: ECU Terminal Connections]\nSymbol | Terminal Name | Symbol | Terminal Name | Symbol | Terminal Name\nE01 | POWER GROUND | G2 | CAM POSITION SENSOR | A/C | A/C COMPRESSOR\nE02 | POWER GROUND | G1 | CAM POSITION SENSOR | *2 L/P | HEADLIGHT RELAY\nNo. 10 | INJECTOR (No. 1 and 6) | NE | CAM POSITION SENSOR | SPD | SPEED SENSOR\nNo. 30 | INJECTOR (No. 4 and 5) | E1 | COMPUTER GROUND | **ECT | ECT COMPUTER\nNo. 20 | INJECTOR (No. 2 and 3) | *1 | CHECK CONNECTOR | **DFG | DEFOGER RELAY\nST1 | COLD START INJECTOR | G(-) | CAM POSITION SENSOR | L1 | TEMS COMPUTER\nHTI | WATER SENSOR HEATER | OIL | OIL PRESSURE SWITCH | FC | CIRCUIT OPENING RELAY\n- | - | TE1 | CHECK CONNECTOR | L2 | TEMS COMPUTER\nVSV2 | VSV (FPU) | OX | OXYGEN SENSOR | FP | FUEL PUMP RELAY\n- | - | - | - | L3 | TEMS COMPUTER\nEGR | VSV (EGR) | KNK1 | KNOCK SENSOR | W | WARNING LIGHT\n- | - | KNK2 | KNOCK SENSOR | TIL | TURBO INDICATOR\nISC1 | ISC MOTOR NO. 1 COIL | THW | WATER TEMP. SENSOR | MREL | EFI MAIN RELAY (COIL)\nIGT | IGNITER | IDL | THROTTLE POSITION SENSOR | - | -\nISC2 | ISC MOTOR NO. 2 COIL | THA | AIR TEMP. SENSOR | - | -\nIGDA | IGNITER | VTA | THROTTLE POSITION SENSOR | - | -\nISC3 | ISC MOTOR NO. 3 COIL | KS | AIR FLOW METER | IG SW | IGNITION SWITCH\nIGDB | IGNITER | - | - | +B1 | EFI MAIN RELAY\nISC4 | ISC MOTOR NO. 4 COIL | VC | AIR FLOW METER THROTTLE POSITION SENSOR | BATT | BATTERY\n- | - | E2 | SENSOR GROUND | +B | EFI MAIN RELAY\nIGF | IGNITER | STA | STARTER SWITCH | *1 California vehicles only\n**THG | EGR GAS TEMP. SENSOR | N/C (NSW) | CLUTCH SWITCH (M/T) NEUTRAL START SWITCH (A/T) | *2 M/T only **A/T only\n\nECU Terminals\n\n[DIAGRAM: ECU terminal layout showing pin configuration]","image":"https://tsrm.sasquatchvc.com/images/mk3/FI/FI_050.png","url":"https://tsrm.sasquatchvc.com/mk3/tsrm/FI/50","prev":{"page":49,"url":"https://tsrm.sasquatchvc.com/mk3/tsrm/FI/49","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/49"},"next":{"page":51,"url":"https://tsrm.sasquatchvc.com/mk3/tsrm/FI/51","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/51"},"section_url":"https://tsrm.sasquatchvc.com/mk3/tsrm/FI","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/1","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/2","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/3","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/4","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/5","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/6","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/7","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/8","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/9","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/10","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/11","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/12","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/13","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/14","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/15","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/16","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/17","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/18","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/19","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/20","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/21","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/22","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/23","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/24","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/25","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/26","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/27","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/28","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/29","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/30","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/31","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/32","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/33","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/34","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/35","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/36","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/37","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/38","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/39","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/40","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/41","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/42","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/43","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/44","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/45","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/46","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/47","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/48","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/49","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/50","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/51","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/52","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/53","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/54","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/55","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/56","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/57","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/58","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/59","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/60","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/61","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/62","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/63","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/64","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/65","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/66","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/67","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/68","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/69","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/70","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/71","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/72","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/73","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/74","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/75","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/76","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/77","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/78","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/79","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/80","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/81","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/82","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/83","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/84","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/85","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/86","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/87","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/88","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/89","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/90","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/91","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/92","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/93","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/94","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/95","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/96","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/97","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/98","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/99","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/100","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/101","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/102","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/103","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/104","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/105","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/106","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/107","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/108","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/109","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/110","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/111","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/112","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/113","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/114","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/115","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/116","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/117","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/118","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/119","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/120","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/121","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/122","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/123","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/124","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/125","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/FI/126"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}