EG-543 ENGINE — 2JZ-GTE ENGINE TROUBLESHOOTING 2 Check sub heated oxyten sensor heater. P Disconnect sub heated oxygen sensor connector. (See page EG-321) C Measure resistance between terminals 1 and 2 of sub heated oxygen sensor connector. OK Resistance: 11 — 16 at 20°C (68°F) P11483 OK NG Replace sub heated oxygen sensor. 3 Check for open and short in harness and connector between EFI main replay and engine control module (See page IN-30). OK NG Repair or replace harness or connector. Check and replace engine control module. 4 Check voltage between terminal HT2 of engine control module connector and body ground. SST ECM B 72 HT2 FI6948 P Warm up engine to normal operating temperature. C Measure voltage between terminal HT2 of engine control module connector and body ground, when engine is idling and racing at 3,500 rpm. OK Voltage Idling 0 V Racing at 3,500 rpm 9 — 14 V NG OK Replace sub heated oxygen sensor.* *: It is probable the oxygen sensor has dete- riorated. Usually, this cannot be confirmed by visual inspection. Check and replace engine control module.