{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Electrical Wiring Diagram","section":"S21","section_name":"ECT System","page":2,"pages_in_section":4,"title":"ECT System","section_header":"","ocr_text":"21\n\n⑧ A/T INDICATOR S/W\n2-GROUND: 12 VOLTS WITH IGNITION S/W ON\n⑩ ECT ECU\nVOLTAGE AT ECT ECU\n10-GROUND: ALWAYS CONTINUITY\n2-GROUND: 5→0→5→0→5 VOLTS } (SLOWLY DEPRESS THE ACCEL PEDAL)\n3-GROUND: 5→0→5 VOLTS\n4-GROUND: 5→0 VOLT\n1-19 + 0 VOLT WITH THROTTLE VALVE FULLY CLOSED\n4 VOLTS WITH THROTTLE VALVE OPENING ABOVE 1.5°\n16-19 + 12 VOLTS OR 0 VOLT WITH STANDING STILL\n8 VOLTS WITH ENGINE RUNNING, VEHICLE MOVING\n22-19 + 12 VOLTS WITH BRAKE PEDAL DEPRESSED\n0 VOLT WITH BRAKE PEDAL NOT DEPRESSED\n21-19 + 9 TO 16 VOLTS WITH SHIFT LEVER AT 2 POSITION\n0 TO 2 VOLTS WITH SHIFT LEVER AT EXCEPT 2 POSITION\n20-19 + 9 TO 16 VOLTS WITH SHIFT LEVER AT L POSITION\n0 TO 2 VOLTS WITH SHIFT LEVER AT EXCEPT L POSITION\n12-19 + 12 VOLTS\n10,11-19 + 0 VOLT\n5-19 + 12 VOLTS WITH O/D MAIN S/W ON\n0 VOLT WITH O/D MAIN S/W OFF\n24-19 + 12 VOLTS WITH STANDING STILL\n15-19 + 5(12) VOLTS WITH STANDING STILL\n4(10) VOLTS WITH ENGINE RUNNING\n8-19 + 12 VOLTS WITH PATTERN SELECT S/W AT PWR POSITION\n1 VOLT WITH PATTERN SELECT S/W AT NORM POSITION\n23-19 + 12 VOLTS\n17-GROUND: 0 VOLT WITH COOLANT TEMP.35-80°C(95-140°F)\n5 VOLTS WITH COOLANT TEMP.MORE THAN 70°C(158°F)\n(1: AISIN COMPUTER\n⑥ ECT SOLENOID\n1,2,3-GROUND: EACH 11-15Ω\n⑦ SPEED SENSOR (COMB.METER)\n0-5: REVOLVE METER SHAFT AND CHECK THAT METER\nNEEDLE REPEATEDLY DEFLECTS FROM 0Ω TO ∞Ω\n⑧ O/D MAIN S/W\n1-3: CLOSED WITH O/D MAIN S/W OFF\nOPEN WITH O/D MAIN S/W ON\n\n13 SB\nR-G R-G\nG-O G-O\n2 E4 1 E4\nP-G P-G R-G\n8 10 9 8\nPWR NORM D/D OFF\nP\n⑩ ECT ECU\nSP1 DG 0/D2\n16 13 5\nP-G P-G\n4 ZD\n15 ZA\nP-G\n13 E1 14 B2\nY-R Y-B\nJ/B NO.3\nP-G\n5 6 17 ECT\nL SPEED SENSOR (COMB.METER)\nE1 3\nN DATA LINK CONNECTOR\nBR BR\nFLOOR CENTER INTAKE MANIFOLD J/B NO.1 SBF BOLT RADIO LEFT\n3 CF\nP-G\n1 O/D MAIN S/W\n3\nH-B H-B P-G H-B\nW-B P-G\nA/T INDICATOR\nY","image":"https://tsrm.sasquatchvc.com/images/mk3-ewd/S21/S21_002.png","url":"https://tsrm.sasquatchvc.com/mk3/ewd/S21/2","prev":{"page":1,"url":"https://tsrm.sasquatchvc.com/mk3/ewd/S21/1","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S21/1"},"next":{"page":3,"url":"https://tsrm.sasquatchvc.com/mk3/ewd/S21/3","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S21/3"},"section_url":"https://tsrm.sasquatchvc.com/mk3/ewd/S21","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S21/1","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S21/2","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S21/3","https://tsrm.sasquatchvc.com/api/pages/mk3/ewd/S21/4"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}