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Nissan Sentra B18 (2020-2025) Service Manual: Dlc Branch Line Circuit

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK CONNECTOR

    1. Turn the ignition switch OFF.

    2. Disconnect the battery cable from the negative terminal.

    3. Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).

      • 8CH CAN gateway

      • Data link connector

    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 8CH CAN gateway.

    2. Check the resistance between the 8CH CAN gateway harness connector terminals.

      8CH CAN gateway harness connector

      Continuity

      Connector No.

      Terminal No.

      M37

      13

      29

      Existed

      14

      30

      Existed

    Is the measurement value within the specification?

    YES >>

    GO TO 3.

    NO >>

    Repair the harness and repair the root cause (Diagnostic CAN communication circuit side).

  3. CHECK HARNESS FOR OPEN CIRCUIT

    1. Connect the connector of 8CH CAN gateway.

    2. Check the resistance between the data link connector terminals.

      Data link connector

      Resistance (Ω)

      Connector No.

      Terminal No.

      M22

      6

      14

      Approx. 54 – 66

    Is the measurement value within the specification?

    YES (Present error) >>

    Check CAN system type decision again.

    YES (Past error) >>

    Error was detected in the data link connector branch line circuit.

    NO >>

    Repair the data link connector branch line.

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