{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Electrical Wiring Diagram","section":"S3","section_name":"EFI System","page":4,"pages_in_section":12,"title":"EFI Main Relay and Component Resistance Specifications","section_header":"EFI Components and Resistance Values","ocr_text":"3-1\n\nEFI MAIN RELAY\nCLOSED WITH IGNITION S/W AT IG OR ST POSITION\n③ EFI RESISTOR\n1-2:2-3:2-4: EACH 2Ω\n⑤ INJECTOR\n1-2: EACH 1.5-3.0Ω\n④ STARTER RELAY\n2-4: CLOSED WITH CLUTCH PEDAL FULLY DEPRESSED\nAND IGNITION S/W AT ST POSITION\n⑤ CIRCUIT OPENING RELAY\n1-2: CLOSED WITH STARTER RUNNING OR\nMEASURING PLATE (AIR FLOW METER) OPEN\n⑥ FUEL PUMP RESISTOR\n1-2: APPROX. 0.7Ω\n⑦ AIR FLOW METER\n1-2: 10-20KΩ (-20°C.-4°F)\n4-7KΩ (0°C.32°F)\n2-3KΩ (20°C.68°F)\n0.8-1.3KΩ (40°C.104°F)\n0.4-0.7KΩ (80°C.140°F)\n⑧ THROTTLE POSITION SENSOR\n2-4: 0.3-6.3KΩ WITH CLEARANCE BETWEEN\nLEVER AND STOP SCREW OHM (DIN.)\n3-4: LESS THAN 2.3KΩ WITH CLEARANCE BETWEEN\nLEVER AND STOP SCREW 0.40MM (0.0157IN)\n∞Ω WITH 0.75HM (0.0295IN)\n2-4: 3.5-10.3KΩ WITH THROTTLE VALVE FULLY OPEN\n1-4: 4.25-8.25KΩ\n⑨ ISC VALVE\n2-1.3: EACH 10-30Ω\n1-2.4: EACH 10-30Ω\n⑩ WATER THERMO SENSOR\n1-2: APPROX.6KΩ (0°C.32°F)\nAPPROX.1.5KΩ (40°C.104°F)\nAPPROX.0.5KΩ (80°C.176°F)\n\nTCCS ECU (ELECTRONIC CONTROLLED UNIT)\nVOLTAGE AT ECU CONNECTORS\n⑥ 2-⑩ 7: 10-14 VOLTS\n⑥ 13.⑥ 14-⑩ 7: 10-14 VOLTS (IGNITION S/W ON)\n⑥ 1-⑩ 7: 10-14 VOLTS (IGNITION S/W ON)\n⑥ 9-⑩ 7: 10-14 VOLTS (IGNITION S/W ON)\n⑦ 13-⑥ 24: 4-6 VOLTS (IGNITION S/W ON.\nTHROTTLE VALVE OPEN)\n⑦ 14-⑥ 24: 0.1-5 VOLTS (IGNITION S/W ON.\nTHROTTLE VALVE CLOSED TO OPEN)\n⑦ 3-⑥ 24: 4-6 VOLTS (IGNITION S/W ON)\n⑦ 4-⑥ 24: 4-5 VOLTS (IGNITION S/W ON.\nMEASURING PLATE FULLY CLOSED)\n0.02-0.08 VOLTS (IGNITION S/W ON.\nMEASURING PLATE FULLY OPEN)\n2.3-4.0 VOLTS (IDLING)\n0.3-1.0 VOLTS (3000 RPM)\n⑥ 5-⑥ 24: 1.0-3.0 VOLTS (IGNITION S/W ON.\nINTAKE AIR TEMP.20°C (68°F)\n⑦ 1-⑥ 24: 0.1-1.0 VOLT (IGNITION S/W ON.\nCOOLANT TEMP.80°C(176°F)\n\n⑩ 3-⑩ 7 : 8-14 VOLTS\n(IGNITION S/W AT ST POSITION)\n⑩ 4.⑩ 8.⑩ 9-⑩ 7 : 8-14 VOLTS (IGNITION S/W ON)\n⑦ 3-⑩ 7 : 0.7-1.0 VOLTS (IDLING)\n⑦ 8.⑦ 9.⑦ 17.⑦ 18-⑩ 7: 8-14 VOLTS (IGNITION S/W ON)\n8-14 VOLTS\n(2-3 SECONDS AFTER ENGINE OFF)\n⑦ 1-⑩ 7 : 0 VOLT WITH IGNITION S/W ON.\nSHIFT POSITION P OR N RANGE\n10-14 VOLTS WITH IGNITION S/W ON.\nSHIFT POSITION EXCEPT P OR N RANGE\n0 VOLT WITH IGNITION S/W ON.\nCLUTCH PEDAL NOT DEPRESSED\n10-14 VOLTS WITH IGNITION S/W ON.\nCLUCH PEDAL DEPRESSED\n8-11 VOLTS WITH CRANKING\n⑪ 15-⑩ 7 : 4-6 VOLTS WITH IGNITION S/W ON.\nCHECK CONNECTOR T-E1 NOT SHORT\n0 VOLT WITH IGNITION S/W ON.\nCHECK CONNECTOR T-E1 SHORT\n⑪ 20-⑩ 7 : 10-14 VOLTS WITH IGNITION S/W ON\nA/C S/W ON\n0 VOLT WITH IGNITION S/W ON\nA/C S/W OFF\n⑦ 18-⑩ 7 : 0.4-5 VOLTS WITH ENGINE START\n(THROTTLE VALVE OPEN)\n⑪ 19-⑩ 7 : 0 VOLT WITH IGNITION S/W ON\n: 10-13 VOLTS WITH ENGINE START\n⑪ 18-⑩ 7 : 10-14 VOLTS WITH IGNITION S/W ON\nDEFOGGER S/W OFF\n0 VOLT WITH IGNITION S/W ON\nDEFOGGER S/W ON\n⑥ 16-⑩ 7 : 10-14 VOLTS WITH HEADLIGHT S/W OFF\n0 VOLT WITH HEADLIGHT S/W ON\n\nRESISTANCE AT ECU CONNECTOR\n(DISCONNECT WIRING CONNECTOR FROM ECU)\n⑦ 13-⑥ 24: ∞Ω (THROTTLE VALVE FULLY OPEN)\nLESS THAN 2.3KΩ (THROTTLE VALVE FULLY CLOSED)\n⑦ 14-⑥ 24: 3500-10300Ω (THROTTLE VALVE FULLY OPEN)\n300-6500Ω (THROTTLE VALVE FULLY CLOSED)\n⑪ 3-⑥ 24: 200-400Ω\n⑪ 4-⑥ 24: 20-800Ω (MEASURING PLATE FULLY CLOSED)\n20-3000Ω (MEASURING PLATE FULLY OPEN)\n⑪ 5-⑥ 24: 2000-3000Ω (INTAKE AIR TEMP.20°C.68°F)\n⑦ 5.⑦ 6.⑦ 4-⑦ 7: 140-180Ω\n⑦ 8.⑦ 9.⑦ 17.⑦ 18-⑥ 14: 10-30Ω","image":"https://tsrm.sasquatchvc.com/images/mk3-ewd/S3/S3_004.png","url":"https://tsrm.sasquatchvc.com/mk3/ewd/S3/4","prev":{"page":3,"url":"https://tsrm.sasquatchvc.com/mk3/ewd/S3/3","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/3"},"next":{"page":5,"url":"https://tsrm.sasquatchvc.com/mk3/ewd/S3/5","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/5"},"section_url":"https://tsrm.sasquatchvc.com/mk3/ewd/S3","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/1","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/2","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/3","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/4","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/5","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/6","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/7","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/8","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/9","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/10","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/11","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S3/12"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}