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

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE

    1. Check that the following fuses are not blown:

      Terminal No.

      Signal name

      Fuse No.

      Capacity

      1

      Battery power supply

      35

      10 A

      10

      Ignition signal

      48

      10 A

    Are the fuses 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 TCU connector .

      3. Check voltage between TCU connector and ground.

        (+)

        (-)

        Condition

        Voltage

        (Approx.)

        TCU

        Connector

        Terminal

        M160

        1

        Ground

        Ignition switch: OFF

        Battery voltage

        10

        Ignition switch: ON

    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 TCU connector and ground.

        TCU

        —

        Continuity

        Connector

        Terminal

        M160

        28

        Ground

        Yes

        29

    Is the inspection result normal?

    YES>>

    Inspection End.

    NO>>

    Repair or replace harness or connectors.

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