Component Function Check

The fuel injector is a small, precise solenoid valve. When the ECM supplies a ground to the fuel injector circuit, the coil in the fuel injector is energized. The energized coil pulls the ball valve back and allows fuel to flow through the fuel injector into the intake manifold. The amount of fuel injected depends upon the injection pulse duration. Pulse duration is the length of time the fuel injector remains open. The ECM controls the injection pulse duration based on engine fuel needs.

1. INSPECTION START 

   Turn ignition switch to START.

   Are any cylinders ignited?

   YES

   GO TO 2.

   NO

   Refer to Diagnosis Procedure .

2. CHECK FUEL INJECTOR FUNCTION 

   With CONSULT

   1. Start engine.
   2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT.
   3. Make sure that each circuit produces a momentary engine speed drop.

   Without CONSULT

   1. Start engine.
   2. Listen to each fuel injector operating sound.

      Courtesy of NISSAN NORTH AMERICA, INC.

      Clicking sound should be heard.

   Is the inspection result normal?

   YES

   INSPECTION END

   NO

   Refer to Diagnosis Procedure .