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Home >> Infiniti >> 2024 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (4 Of 4) >> Engine (ECM) >> DTC U1040: Eng Comm Circuit >> Confirmation Procedure

Confirmation Procedure

  1. PRECONDITIONING 

    If another DTC Confirmation Procedure is conducted just before this procedure, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

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  2. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Turn ignition switch ON and wait at least 10 seconds.
    2. Check 1st trip DTC.

    Is DTC U1040 detected?

    YES>>

    Refer to DTC Diagnosis Procedure .

    NO-1>>

    To check malfunction symptom before repair: Refer to Inspection .

    NO-2>>

    Confirmation after repair: INSPECTION END

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