{"model":"mk4","model_name":"MK4 Supra","vehicle":"Toyota Supra A80 (1993–2002, 2JZ-GE / 2JZ-GTE)","document":"Repair Manual","section":"TGE","section_name":"Troubleshooting 2JZ-GE","page":44,"pages_in_section":105,"title":"Dtc 22 Engine Coolant Temp. Sensor Circuit","section_header":"Engine — 2JZ-GE Engine Troubleshooting","ocr_text":"EG–424\n\nENGINE – 2JZ–GE ENGINE TROUBLESHOOTING\n\nDTC 22 Engine Coolant Temp. Sensor Circuit\n\nCIRCUIT DESCRIPTION\n\nThe engine coolant temperature sensor senses the coolant temperature. A thermistor built in the sensor changes its resistance value according to the coolant temperature. The lower the coolant temperature, the greater the thermistor resistance value, and the higher the coolant temperature, the lower thermistor resistance value (See Fig. 1.).\nThe engine coolant temperature sensor is connected to the ECM (See wiring diagram). The 5 V power source voltage in the ECM is applied to the engine coolant temperature sensor from the terminal THW via a resistor R. That is, the resistor R an the engine coolant temperature sensor are connected in series. When the resistance value of the engine coolant temperature sensor changes in accordance with the changes in the coolant temperature the potential at the terminal THW also changes. Based on this signal, the ECM increases the fuel injection volume to improve driveability during cold engine operation. If the ECM detects the diagnostic trouble code 22, it operates the fail safe function in which the engine coolant temperature is assumed to be 80°C (176°F).\n\n(fig-1)\n\nResistance kΩ\n30\n20\n10\n5\n3\n2\n1\n0.5\n0.3\n0.2\n0.1\n\nAcceptable\n\n–20  0  20  40  60  80  100\n(–4) (32)(68)(104)(140)(176)(212)\nTemperature °C (°F)\n\nFI4741\n\nReference\n\nEngine Coolant Temp.\n°C (°F) | Resistance (kΩ) | Voltage (V)\n\n–20 (–4) | 16.2 | 4.3\n0 (32) | 5.9 | 3.4\n20 (68) | 2.5 | 2.4\n40 (104) | 1.1 | 1.4\n60 (140) | 0.6 | 0.9\n80 (176) | 0.3 | 0.5\n100 (212) | 0.2 | 0.3\n\nDTC No. | Diagnostic Trouble Code Detecting Condition | Trouble Area\n\n22 | Open or short in engine coolant temp. sensor circuit for 0.5 sec. or more | • Open or short in engine coolant temp. sensor circuit\n• Engine coolant temp. sensor\n• ECM\n\nWIRING DIAGRAM\n\nEngine Coolant Temp. Sensor\n\n2    L-Y\n\n1    BR-B\n\nEngine Control Module\n\n44\nTHW  R\n⊕5V\n\n65  E2\nE1\n\nFI8448","image":"https://tsrm.sasquatchvc.com/images/mk4/TGE/TGE_044.png","url":"https://tsrm.sasquatchvc.com/mk4/tsrm/TGE/44","prev":{"page":43,"url":"https://tsrm.sasquatchvc.com/mk4/tsrm/TGE/43","api":"https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/43"},"next":{"page":45,"url":"https://tsrm.sasquatchvc.com/mk4/tsrm/TGE/45","api":"https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/45"},"section_url":"https://tsrm.sasquatchvc.com/mk4/tsrm/TGE","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/1","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/2","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/3","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/4","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/5","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/6","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/7","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/8","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/9","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/10","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/11","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/12","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/13","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/14","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/15","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/16","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/17","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/18","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/19","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/20","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/21","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/22","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/23","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/24","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/25","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/26","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/27","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/28","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/29","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/30","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/31","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/32","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/33","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/34","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/35","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/36","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/37","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/38","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/39","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/40","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/41","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/42","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/43","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/44","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/45","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/46","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/47","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/48","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/49","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/50","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/51","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/52","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/53","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/54","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/55","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/56","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/57","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/58","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/59","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/60","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/61","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/62","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/63","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/64","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/65","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/66","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/67","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/68","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/69","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/70","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/71","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/72","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/73","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/74","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/75","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/76","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/77","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/78","https://tsrm.sasquatchvc.com/api/pages/mk4/tsrm/TGE/79","https://tsrm.sasqua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transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}