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Home >> Infiniti >> 2017 >> QX80 Base, RWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> DTC/Circuit Diagnosis >> DTC P0506: ISC System >> Diagnosis Procedure >> Diagnostic Test
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Diagnostic Test

  1. 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 STEP 2  .

  2. REPLACE ECM

    1. Stop engine.
    2. Replace ECM.
    3. Perform additional service when replacing ECM. Refer to DESCRIPTION .

    INSPECTION END

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