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Home >> Infiniti >> 2021 >> Q50 Pure, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 6) >> Engine (ECM) >> P050A Cold Start Control >> Confirmation Procedure >> VR30DDTT engine
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VR30DDTT engine

  1. CHECK DTC PRIORITY 

    If DTC P050A 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. PRECONDITIONING 

    If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Turn ignition switch ON.
    3. Turn ignition switch OFF and wait at least 10 seconds.

    TESTING CONDITION:

    Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

    GO TO 3.

  3. PERFORM DTC CONFIRMATION PROCEDURE-I 

    SYMBOL With CONSULT

    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Turn ignition switch ON.
    3. Select "DATA MONITOR" mode with CONSULT.
    4. Check the indication of "COOLAN TEMP/S".

    SYMBOL With GST

    Follow the procedure "With CONSULT" above.

    Is the value of "COOLAN TEMP/S" between 5 deg. C (41 deg. F) and 36 deg. C (97 deg. F)?

    YES

    GO TO 4.

    NO

    Warm up the engine until the value of "COOLAN TEMP/S" reaches 4 deg. C (39 deg. F) or more. Retry from step 1.

    NO

    Cool engine down to less than 36 deg. C (97 deg. F). Retry from step 1.

  4. PERFORM DTC CONFIRMATION PROCEDURE-II 

    SYMBOL With CONSULT

    1. Set the select lever in N range.
    2. Start the engine and warm up in idle with the value of "COOLAN TEMP/S" between 5 deg. C (41 deg. F) and 40 deg. C (104 deg. F) for more than 15 seconds.
    3. Check 1st trip DTC.

    SYMBOL With GST

    Follow the procedure "With CONSULT" above.

    Is 1st trip DTC detected?

    YES

    Refer to DTC Diagnosis Procedure .

    NO

    To check malfunction symptom before repair: Refer to Inspection .

    NO

    Confirmation after repair: INSPECTION END