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Home › Infiniti › 2014 › Q50 Base, AWD › Repair and Diagnosis › Engine Performance › System › Engine Control System - DTCS P0500 To P2101 (Except Hybrid) › DTC P0507: ISC System › Diagnosis Procedure

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 ".

    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.
    3. Go to "WORK PROCEDURE ".

      : INSPECTION END

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