{"model":"mk2","model_name":"MK2 Supra","vehicle":"Toyota Supra A60 (1982–1986, 5M-GE)","document":"Repair Manual","section":"EC","section_name":"Emission Control Systems","page":15,"pages_in_section":16,"title":"Three-Way Catalyst (TWC) System","section_header":"Emission Control Systems — Three-Way Catalyst (TWC) System","ocr_text":"EMISSION CONTROL SYSTEMS — Three-Way Catalyst (TWC) System                EC-15\n\nTHREE-WAY CATALYST (TWC) SYSTEM\n\n[DIAGRAM showing exhaust system with components labeled: NOx CO HC flowing through Three-way Catalyst (Monolithic) to CO2, N2, H2O]\n\nTo reduce HC, CO and NOx emissions, they are oxidized, reduced and converted to nitrogen (N2), carbon dioxide (CO2) and water (H2O) by the catalyst.\n\nExhaust port                                TWC                           Exhaust Gas\nHC,CO, AND NOx  ------->  OXIDATION AND  ------->  CO2\n                          REDUCTION                 H2O\n                                                    N2\n\nINSPECTION OF EXHAUST PIPE ASSEMBLY\n\n1. CHECK CONNECTIONS FOR LOOSENESS OR DAMAGE\n\n2. CHECK CLAMPS FOR WEAKNESS, CRACKS OR DAMAGE\n\nINSPECTION OF CATALYTIC CONVERTER\n\nCHECK FOR DENTS OR DAMAGE\n\nIf any part of protector is damaged or dented to the extent that it contacts the catalyst, repair or replace.\n\n[DIAGRAM showing catalytic converter with arrow pointing to inspection area]","image":"https://tsrm.sasquatchvc.com/images/mk2/EC/EC_015.png","url":"https://tsrm.sasquatchvc.com/mk2/tsrm/EC/15","prev":{"page":14,"url":"https://tsrm.sasquatchvc.com/mk2/tsrm/EC/14","api":"https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/14"},"next":{"page":16,"url":"https://tsrm.sasquatchvc.com/mk2/tsrm/EC/16","api":"https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/16"},"section_url":"https://tsrm.sasquatchvc.com/mk2/tsrm/EC","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/1","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/2","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/3","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/4","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/5","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/6","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/7","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/8","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/9","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/10","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/11","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/12","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/13","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/14","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/15","https://tsrm.sasquatchvc.com/api/pages/mk2/tsrm/EC/16"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}