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Home >> Infiniti >> 2023 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (5 Of 5) >> Engine (ECM) >> DTC U1003: Can Comm Circuit >> Confirmation Procedure
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Confirmation Procedure

  1. CHECK DTC PRIORITY 

    If DTC U1003 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607.

    Is applicable DTC detected?

    YES

    Perform the diagnosis of the applicable. Refer to DTC Description .

    NO

    GO TO 2.

  2. PRECONDITIONING 

    TESTING CONDITION:

    Before performing the following procedure, confirm that battery voltage is 10 V or more at idle.

    GO TO 3.

  3. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Turn ignition switch ON and wait at least 3 seconds.
    2. Check DTC.

    Is DTC detected?

    YES

    Refer to DTC Diagnosis Procedure .

    NO

    To check malfunction symptom before repair: Refer to Inspection .

    NO

    Confirmation after repair: INSPECTION END