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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Control System (DTC/Circuit Diagnosis) (5.6L) (4 Of 6)) >> DTC/Circuit Diagnosis >> DTC P0507: ISC System >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC PRIORITY 

    If DTC P0507 is displayed with other DTC, first perform the trouble diagnosis for other DTC.

    Is applicable DTC detected?

    YES

    Perform diagnosis of applicable. Refer to DTC Index .

    NO

    GO TO 2.

  2. CHECK PCV HOSE CONNECTION 

    Confirm that PCV hose is connected correctly.

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace malfunctioning part.

  3. CHECK INTAKE AIR LEAKAGE 
    1. Start engine and let it idle.
    2. Listen for an intake air leakage after the mass air flow sensor.

    Is intake air leakage detected?

    YES

    Discover air leakage location and repair.

    NO

    GO TO 4.

  4. REPLACE ECM 
    1. Stop engine.
    2. Replace ECM.
    3. Perform additional service when replacing ECM. Refer to Description .

    INSPECTION END

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