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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 341 (Engine Control System (DTC/Circuit Diagnosis) (1 Of 17)) >> DTC/Circuit Diagnosis >> DTC U042F: Engine Communication >> DTC Confirmation Procedure

DTC Confirmation Procedure

WARNING: This page is about a different car, the 2019 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC PRIORITY 

    If DTC U042F is displayed with DTC U1000, first perform the confirmation procedure (trouble diagnosis) for DTC U1000.

    Is DTC U1000 detected?

    YES

    Perform diagnosis for U1000. Refer to DTC Description .

    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 when ignition switch ON.

    GO TO 3.

  3. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Start the engine and wait at least 1 second.
    2. Check 1st trip DTC.

    Is DTC U042F detected?

    YES

    Proceed to Diagnosis Procedure .

    NO

    To check malfunction symptom before repair: Refer to Intermittent Incident .

    NO

    Confirmation after repair: INSPECTION END

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