{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Repair Manual","section":"EC","section_name":"Emission Control Systems","page":20,"pages_in_section":22,"title":"Three-Way Catalyst (TWC) System","section_header":"Emission Control Systems — Three Way Catalyst (TWC) System","ocr_text":"THREE-WAY CATALYST (TWC) SYSTEM\n\n7M-GE (Federal and Canada)\nNOx, CO, HC\nThree-Way Catalyst\n(Monolithic)\nCO₂, N₂, H₂O\n\n7M-GE (California)\nNOx, CO, HC\nThree-Way Catalyst\n(Monolithic)\nThree-Way Catalyst\n(Monolithic)\nCO₂, N₂, H₂O\n\n7M-GTE\nNOx,\nCO, HC\nThree-Way Catalyst\n(Monolithic)\nThree-Way Catalyst\n(Monolithic)\nCO₂, N₂, H₂O\nEC-1422\nFigure\nEC-20-1\n\nTo reduce HC, CO and NOx emission, they are oxidized, reduced and converted to nitrogen (N₂), carbon dioxide (CO₂)\nand water (H₂O) by the catalyst.\n\nExhaust Port\nHC, CO, AND NOx\n\nTWC\nOXIDATION AND\nREDUCTION\n\nExhaust Gas\nCO₂\nH₂O\nN₂","image":"https://tsrm.sasquatchvc.com/images/mk3/EC/EC_020.png","url":"https://tsrm.sasquatchvc.com/mk3/tsrm/EC/20","prev":{"page":19,"url":"https://tsrm.sasquatchvc.com/mk3/tsrm/EC/19","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/19"},"next":{"page":21,"url":"https://tsrm.sasquatchvc.com/mk3/tsrm/EC/21","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/21"},"section_url":"https://tsrm.sasquatchvc.com/mk3/tsrm/EC","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/1","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/2","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/3","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/4","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/5","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/6","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/7","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/8","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/9","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/10","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/11","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/12","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/13","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/14","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/15","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/16","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/17","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/18","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/19","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/20","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/21","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/EC/22"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}