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Home >> Nissan-Datsun >> 2017 >> Maxima SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> DTC/Circuit Diagnosis >> DTC P0506: ISC System >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

  1. CHECK DTC PRIORITY

    If DTC P0506 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.

    Is applicable DTC detected?

    YES 

    Perform diagnosis of applicable. Refer to DTC INDEX .

    NO 

    GO TO STEP 2  .

  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 

    Replace ECM. Refer to REMOVAL AND INSTALLATION .

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