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FUEL INJECTOR ECM-373 < DTC/CIRCUIT DIAGNOSIS > [MR20DD] C D E F G H I J K L M A ECM N P O 4. Also check harness for short to power. Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace malfunctioning part. 3. CHECK FUEL INJECTOR DRIVER POWER SUPPLY 1. Disconnect ECM harness connector. 2. Turn ignition switch ON. 3. Check the continuity between ECM harness connector and ground. Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-41, "Intermittent Incident" . NO >> GO TO 4. 4. CHECK FUEL INJECTOR DRIVER POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Disconnect fuel injector relay harness connector. 4. Check the continuity between ECM harness connector and fuel injector relay harness connector. 5. Also check harness for short to power. Is the inspection result normal? YES >> GO TO 5. NO >> Repair or replace malfunctioning part. 5. CHECK FUEL INJECTOR RELAY POWER SUPPLY (CONTACT SIDE) Check the voltage between fuel injector relay harness connector and ground. + − Continuity Fuel injector ECM Cylinder Connector Terminal Connector Terminal 1 F29 1 F15 1 Existed 2 F30 1 2 3 F31 1 3 4 F32 1 4 + − Voltage ECM Connector Terminal F16 49 Ground Battery voltage 53 + − Continuity ECM Fuel injector relay Connector Terminal Connector Terminal F16 49 F49 5 Existed 53 7 + − Voltage Fuel injector relay Connector Terminal F49 3 Ground Battery voltage 6 |