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P0172, P0175 FUEL INJECTION SYSTEM FUNCTION EC-711 < DTC/CIRCUIT DIAGNOSIS > [VQ40DE FOR USA AND CANADA] C D E F G H I J K L M A EC N P O 1. Start engine. 2. Listen to fuel injectors No.2, No.4, No.6 operating sound. OK or NG OK >> GO TO 12. NG >> Perform trouble diagnosis for FUEL INJECTOR, refer to EC-928, "Component Description" . 12. CHECK FUEL INJECTOR 1. Remove fuel injector assembly. Refer to EM-162, "Removal and Installation" . Keep fuel hose and all fuel injectors connected to fuel tube. 2. Confirm that the engine is cooled down and there are no fire hazards near the vehicle. 3. Disconnect all fuel injector harness connectors. 4. Disconnect all ignition coil harness connectors. 5. Prepare pans or saucers under each fuel injector. 6. Crank engine for about 3 seconds. Make that sure fuel does not drip from fuel injector. OK or NG OK (Does not drip.)>>GO TO 13. NG (Drips.)>>Replace the fuel injectors from which fuel is dripping. Always replace O-ring with new one. 13. CHECK INTERMITTENT INCIDENT . >> INSPECTION END Clicking noise should exist. PBIB1986E |