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Home >> Infiniti >> 2013 >> M56 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0190 To P1084 >> DTC P0507: ISC System >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK PCV HOSE CONNECTION 

    Confirm that PCV hose is connected correctly.

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Repair or replace malfunctioning part.

  2. 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 3.

  3. REPLACE ECM 
    1. Stop engine.
    2. Replace ECM. Refer to "REMOVAL AND INSTALLATION ".
    3. Perform additional service when replacing ECM. Refer to "WORK PROCEDURE ".

      : INSPECTION END

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