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Home >> Infiniti >> 2021 >> Q50 Pure, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 6) >> Engine (ECM) >> P0234 TC System >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK DTC PRIORITY 

    If DTC P0234 is displayed with DTC P0237 or P0238, first perform the trouble diagnosis for DTC P0237 or P0238.

    Is applicable DTC detected?

    YES

    Perform diagnosis of applicable DTC. Refer to DTC Description .

    NO

    GO TO 2.

  2. CHECK TURBOCHARGER BOOST SENSOR 

    Perform diagnosis procedure for turbocharger boost sensor. Refer to DTC Diagnosis Procedure .

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace error-detected parts.

  3. CHECK ELECTRIC WASTEGATE CONTROL ACTUATOR 

    Perform trouble diagnosis for electric wastegate control actuator. Refer to DTC Diagnosis Procedure .

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace error-detected parts.

  4. PERFORM ELECTRIC WASTEGATE CONTROL ACTUATOR INITIALIZATION 
    1. Perform electric wastegate control actuator initialization. Refer to Work Procedure .
    2. Perform drive test.
    3. Check DTC.

    Is DTC P0234 detected again?

    YES

    Replace ECM. Refer to ECM : Removal & Installation .

    NO

    INSPECTION END