{"model":"mk4","model_name":"MK4 Supra","vehicle":"Toyota Supra A80 (1993–2002, 2JZ-GE / 2JZ-GTE)","document":"Repair Manual","section":"IN","section_name":"Introduction","page":29,"pages_in_section":44,"title":"Circuit Inspection","section_header":"Introduction — How to Troubleshoot ECU Controlled Systems","ocr_text":"IN–28\n\nINTRODUCTION – HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS\n\n6 CIRCUIT INSPECTION\n\nHow to read and use each page is shown below.\n\n• Diagnostic Trouble Code No.\nand Detection Item\n\n• Circuit Description\nThe major role and operation, etc. of the\ncircuit and its component parts are explained.\n\nDTC    24    Intake Air Temp. Sensor Circuit\n\n• Indicates the diagnostic\ntrouble code, diagnostic\ntrouble code set parameter\nand suspect area of the\nproblem.\n\nCIRCUIT DESCRIPTION\n\nThe intake air temp. sensor is built into the volume air flow meter and senses the intake air temperature.\nThe structure of the sensor and connection to the ECM is the same as in the engine coolant temp. sensor shown on page EG-424.\nIf the ECM detects the diagnostic trouble code \"24\", it operates the fail safe function in which the intake air temperature is assumed to be 20°C(68°F).\n\nDTC No. | Diagnostic Trouble Code Detecting Condition | Trouble Area\n24 | Open or short in intake air temp. sensor circuit for 0.5 sec. or more | • Open or short in intake air temp. sensor circuit\n• Intake air temp. sensor\n• ECM\n\nWIRING DIAGRAM\n\nIntake Air Temp. Sensor\n(Inside Volume Air Flow Meter)\n\n2    P-L\n\n1    BR-B\n\nEngine Control Module\n\n⊕ 5V\n45 THA\nE3 +WA-\n\n66 E2\nE3\nE1\n\nF4648\n\n• Wiring Diagram\nThis shows a wiring diagram of the circuit. Use this\ndiagram together with ELECTRICAL WIRING DIA-\nGRAM to thoroughly understand the circuit.","image":"https://tsrm.sasquatchvc.com/images/mk4/IN/IN_029.png","url":"https://tsrm.sasquatchvc.com/mk4/tsrm/IN/29","prev":{"page":28,"url":"https://tsrm.sasquatchvc.com/mk4/tsrm/IN/28","api":"https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/28"},"next":{"page":30,"url":"https://tsrm.sasquatchvc.com/mk4/tsrm/IN/30","api":"https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/30"},"section_url":"https://tsrm.sasquatchvc.com/mk4/tsrm/IN","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/1","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/2","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/3","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/4","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/5","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/6","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/7","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/8","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/9","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/10","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/11","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/12","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/13","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/14","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/15","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/16","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/17","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/18","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/19","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/20","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/21","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/22","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/23","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/24","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/25","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/26","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/27","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/28","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/29","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/30","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/31","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/32","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/33","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/34","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/35","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/36","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/37","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/38","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/39","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/40","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/41","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/42","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/43","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/IN/44"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}