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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (4 Of 4) >> DTC/Circuit Diagnosis >> Direct Fuel Injector >> Component Function Check
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Component Function Check

  1. INSPECTION START 

    Turn ignition switch to START.

    Are any cylinders ignited?

    >>

    GO TO 2.

    >>

    Proceed to Diagnosis Procedure .

  2. CHECK DIRECT FUEL INJECTOR FUNCTION 

    SYMBOL With CONSULT

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

    SYMBOL Without CONSULT

    1. Start engine and let it idle.
    2. Listen to each direct fuel injector operating sound.
      GNSDB111189Courtesy of NISSAN NORTH AMERICA, INC.
      Clicking sound should be heard.

    Is the inspection result normal?

    >>

    INSPECTION END

    >>

    Proceed to Diagnosis Procedure .

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