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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 >> CCM Branch Line Circuit (Can 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 the chassis control module connector 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 chassis control module.
    2. Check the resistance between the chassis control module harness connector terminals.

      Chassis control module harness connector

      Resistance (Ω)

      Connector No.

      Terminal No.

      M181

      4

      3

      Approx. 54 - 66

    Is the measurement value within the specification?

    YES

    GO TO 3 .

    NO

    Repair the chassis control module branch line.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT 

    Check the power supply and the ground circuit of the chassis control module. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES

    Replace the chassis control module. Refer to Removal and Installation .

    YES

    Error was detected in the chassis control module branch line.

    NO

    Repair the power supply and the ground circuit.