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6 CHECK IGNITION SPARK 1. Disconnect ignition coil assembly from rocker cover. SEF575Q OK or NG OK © GO TO 7. NG © Check ignition coil, power transistor and their circuits. Refer to EC-QG-323. 7 CHECK INJECTOR 1. Turn ignition switch “OFF”. Keep fuel hose and all injectors connected to injector gallery. 3. Disconnect camshaft position sensor harness connector. Make sure fuel does not drip from injector. OK or NG OK (Does not drip) © GO TO 8. NG (Drips) © Replace the injector(s) from which fuel is dripping. 8 CHECK INTERMITTENT INCIDENT Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-QG-102. Trouble is fixed © INSPECTION END Trouble is not fixed © Replace three way catalyst. DTC P0420 THREE WAY CATALYST FUNCTION QG16 I 18DE Diagnostic Procedure (Cont’d) EC-261 |