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Home >> Infiniti >> 2019 >> Q60 Pure, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (6 Of 13) >> DTC/Circuit Diagnosis >> DTC P0507: ISC System >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK DTC PRIORITY 

    If DTC P0507 is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

    Is applicable DTC detected?

    YES

    Perform diagnosis of applicable. Refer to DTC Index (For turbo high pressure model) or DTC Index (For turbo low pressure model).

    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.

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

    Is intake air leak detected?

    YES

    Discover air leak location and repair.

    NO

    GO TO 4.

  4. REPLACE ECM 
    1. Stop engine.
    2. Replace ECM. refer to Removal and Installation .
    3. Proceed to Description .

    INSPECTION END

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