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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 49 (Can System) >> Can >> DTC/Circuit Diagnosis >> ICC Branch Line Circuit (Its Communication Circuit) >> 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 CONNECTOR 
    1. Turn the ignition switch OFF.
    2. Disconnect the battery cable from the negative terminal.
    3. Check the terminals and connectors of ADAS control unit for damage, bend and loose connection (unit side and connector side).

    Is the inspection result normal?

    YES

    GO TO 2 .

    NO

    Repair the terminal and connector.

  2. CHECK HARNESS FOR OPEN CIRCUIT 
    1. Disconnect the connector of ADAS control unit.
    2. Check the resistance between the ADAS control unit harness connector terminals.

      ADAS control unit harness connector

      Resistance (Ω)

      Connector No.

      Terminal No.

      B89

      2

      5

      Approx. 108 - 132

    Is the measurement value within the specification?

    YES

    GO TO 3 .

    NO

    Repair the ADAS control unit branch line.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT 

    Check the power supply and the ground circuit of the ADAS control unit. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES

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

    YES

    Error was detected in the ADAS control unit branch line.

    NO

    Repair the power supply and the ground circuit.

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