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EC-874 < COMPONENT DIAGNOSIS > [MR18DE] P0420 THREE WAY CATALYST FUNCTION NO >> Check ignition coil, power transistor and their circuits. Refer to . 8. CHECK SPARK PLUG Check the initial spark plug for fouling, etc. Is the inspection result normal? YES >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to EM-145, "Removal and Installa- . NO >> Repair or clean spark plug. Then GO TO 9. 9. CHECK FUNCTION OF IGNITION COIL-III 1. Reconnect the initial spark plugs. 2. Crank engine for about three seconds, and recheck whether spark is generated between the spark plug Is the inspection result normal? YES >> INSPECTION END NO >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to . 10. CHECK FUEL INJECTOR 1. Turn ignition switch OFF. 2. Remove fuel injector assembly. EM-162, "Removal and Installation" Keep fuel hose and all fuel injectors connected to fuel tube. 3. Disconnect all ignition coil harness connectors. 4. Reconnect all fuel injector harness connectors disconnected. 5. Turn ignition switch ON. Does fuel drip from fuel injector? YES >> GO TO 11. NO >> Replace the fuel injector(s) from which fuel is dripping. 11. CHECK INTERMITTENT INCIDENT GI-55, "Intermittent Incident" Is the trouble fixed? YES >> INSPECTION END NO >> Replace three way catalyst assembly. SEF156I Spark should be generated. |