EG–538 ENGINE – 2JZ–GTE ENGINE TROUBLESHOOTING 3 Check for open and short in harness and connector between engine control module and main heated oxygen sensor, engine control module and data link connector 1 (See page IN–30). OK NG Repair or replace harness or connector. 4 Check each item found to be a possible cause of problem. Check each circuit found to be a possible cause of trouble according to the results of the check in 1 or 2 . The numbers int he table below show the order in which the checks should be done. Main heater oxygen sensor signal continues at 0 V Possible Cause See page 1 Faulty sensor installation – 2 Air leakage EG–261 3 Misfire IG–21 4 Fuel system EG–568 5 Injector circuit EG–583 6 Characteristics deviation in engine coolant temp. sensor EG–530 7 Characteristics deviation in intake air temp. sensor EG–532 8 Characteristics deviation in mass air flow meter EG–544 9 Valve timing EG–33 OK NG Repair or replace. 5 Check compression (See page EG–9). OK NG Repair or replace. 6 Does malfunction disappear when a good main heated oxygen sensor is installed? NG YES Replace main heated oxygen sensor. Check and replace engine control module.