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Home › Infiniti › 2021 › Q50 Signature Edition, AWD › Repair and Diagnosis › Engine Performance › System › Engine Control System (DTCS) (4 Of 6) › Engine (ECM) › DTC P05EC: Cold Start Control › DTC Diagnosis Procedure › VR30DDTT engine

VR30DDTT engine

  1. CHECK DTC PRIORITY 

    If DTC P05EC is displayed with other DTC, first perform the trouble diagnosis for other DTC.

    Is applicable DTC detected?

    YES

    Perform diagnosis of applicable. Refer to DTC Index .

    NO

    GO TO 2.

  2. INSPECTION START 
    1. Turn ignition switch ON.
    2. Erase DTC.
    3. Perform DTC confirmation procedure. Refer to DTC Description .
    4. Check 1st trip DTC.

    Is the 1st trip DTC P05EC displayed again?

    YES

    Replace ECM. Refer to ECM : Removal & Installation .

    NO

    INSPECTION END

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