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Nissan Sentra B18 (2020-2025) Service Manual: Power Supply and Ground Circuit. Diagnosis Procedure

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE

    1. Check that the following fuse is not blown:

      Terminal No.

      Signal name

      Fuse No.

      Capacity

      12

      Ignition power supply

      49

      10 A

    Is the fuse blown?

    YES>>

    Replace the blown fuse after repairing the affected circuit.

    NO>>

    GO TO 2.

  2. CHECK POWER SUPPLY CIRCUIT

      1. Ignition switch OFF.

      2. Disconnect sonar control unit connector.

      3. Check voltage between sonar control unit connector and ground.

        (+)

        (–)

        Condition

        Voltage

        (Approx.)

        Sonar control unit

        Connector

        Terminal

        B87

        12

        Ground

        Ignition switch: ON

        Battery voltage

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    Repair or replace harness or connectors.

  3. CHECK GROUND CIRCUIT

      1. Ignition switch OFF.

      2. Check continuity between sonar control unit connector and ground.

        Sonar control unit

        —

        Continuity

        Connector

        Terminal

        B87

        15

        Ground

        Yes

    Is the inspection result normal?

    YES>>

    Inspection End.

    NO>>

    Repair or replace harness or connectors.

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