LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2017 >> QX80 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> DTC/Circuit Diagnosis >> DTC P0507: ISC System >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

  1. CHECK PCV HOSE CONNECTION

    Confirm that PCV hose is connected correctly.

    Is the inspection result normal?

    YES 

    GO TO STEP 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 STEP 3  .

  3. REPLACE ECM

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

    INSPECTION END

scientia non olet · About LEMON Manuals