9. Check Injector

1. Turn ignition switch OFF.
2. Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
3. Disconnect all injector harness connectors.
4. Remove injector gallery assembly. Refer to FUEL INJECTOR AND FUEL TUBE . Keep fuel hose and all injectors connected to injector gallery.
5. For DTC P0171, reconnect injector harness connectors on bank 1. For DTC P0174, reconnect injector harness connectors on bank 2.
6. Disconnect all ignition coil harness connectors.
7. Prepare pans or saucers under each injector.
8. Crank engine for about 3 seconds.

   For DTC P0171, make sure that fuel sprays out from injectors on bank 1.

   For DTC P0174, make sure that fuel sprays out from injectors on bank 2.

   Fuel should be sprayed evenly for each injector. 

   Fig 1: Checking Fuel Sprays Out From Injectors

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO 10.
2. NG: Replace injectors from which fuel does not spray out. Always replace O-ring with new ones.