{"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":42,"pages_in_section":105,"title":"Inspection Procedure (Only for California specification vehicles)","section_header":"Engine — 2JZ-GE Engine Troubleshooting","ocr_text":"EG–422\n\nENGINE – 2JZ-GE ENGINE TROUBLESHOOTING\n\nINSPECTION PROCEDURE (Only for California specification vehicles)\n\nHINT: If diagnostic trouble code \"21\" is output, check the main heated oxygen sensor (Fr) circuit.\n        If diagnostic trouble code \"28\" is output, check the main heated oxygen sensor (Rr) circuit.\n\n1  Check voltage between terminals HT1, HT2 of engine control module connector and body ground.\n\nON\n\nSST\nECM\n\nB 73, 72\n\nHT1  HT2\n\nBE6653\nFI6890\n\nP  Connect SST (check harness \"A\").\n     See page EG–404)\n     SST 09990–01000\n\nC  Measure voltage between terminals HT1, HT2 of engine control module connector and body ground.\n\nOK  Voltage:  9 — 14 V\n\nNG                                    OK  Go to step  3  .\n\n2  Check main heated oxygen sensor heater.\n\nP11484\n\n2\n1\n\nP  Disconnect main heated oxygen sensor connector.\n\nC  Measure resistance between terminals 1 and 2 of main heated oxygen sensor connector.\n\nOK  Resistance:   11 — 16 Ω at 20˚C (68˚F)\n\nOK                                    NG  Replace main heated oxygen sensor.\n\nCheck and repair harness or connector between main relay and main heated oxygen sensor, main heated oxygen sensor and engine control 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