EG–497 ENGINE – 2JZ–GTE ENGINE TROUBLESHOOTING Trouble Area | Malfunction Indicator Lamp*1 | Memory*2 | See page Normal Mode | Test Mode • Open or short in heater circuit of main heated oxygen sensor • Main heated oxygen sensor heater • ECM ON | N.A. • Main heated oxygen sensor circuit • Main heated oxygen sensor ON | ON | ○ | EG–525 • Open or short in engine coolant temp. sensor circuit • Engine coolant temp. sensor • ECM ON | ON | ○ | EG–530 • Open or short in intake air temp. sensor circuit • Intake air temp. sensor • ECM ON | ON | ○ | EG–532 • Open or short in Main heated oxygen sensor circuit • Main heated oxygen sensor • Ignition system • ECM • Onen or short in injector circuit • Fuel line pressure (injector leak, blockage) • Mechanical system malfunction (skipping teeth of timing belt) • Ignition system • Compression pressure (foreign object caught in valve) • Mass air flow meter (air intake) • ECM ON | ON | ○ | EG–534 *1, 2: See page EG–502