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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 394 (ADAS Control Unit (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC C1B56: Sonar Circuit >> Diagnosis Procedure

Diagnosis 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 SELF-DIAGNOSIS RESULTS 

    Check if "U1000" is detected other than "C1B56" in "Self Diagnostic Result" of "ICC/ADAS".

    Is "U1000" detected?

    YES

    Perform the CAN communication system inspection. Repair or replace the malfunctioning parts. Refer to DTC Logic .

    NO

    GO TO 2.

  2. CHECK SELF-DIAGNOSIS RESULTS 

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

    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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