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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 42 (Driver Assistance System (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC U0401: ECM Can 1 >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC PRIORITY 

    If DTC "U0401" is displayed with DTC "U1000", first diagnose the DTC "U1000".

    Is applicable DTC detected?

    YES

    Perform diagnosis of applicable. Refer to DTC Description .

    NO

    GO TO 2 .

  2. CHECK ECM SELF DIAGNOSTIC RESULT 

    Check if any DTC is detected in "Self Diagnostic Result" mode of "ENGINE".

    Is any DTC detected?

    YES

    Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to DTC Index .

    NO

    Replace the ADAS control unit. Refer to Removal and Installation .

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