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

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSES

    1. Check that the following fuses are not blown:

      Terminal No.

      Signal name

      Fuse No.

      Capacity

      7

      Battery power supply

      41

      5 A

      133

      32

      10 A

      135

      Battery power supply (door lock 1)

      28

      10 A

      136

      Battery power supply (turn signal lamp)

      30

      15 A

      138

      Battery power supply (rear wiper)

      21

      10 A

      139

      Battery power supply (stop lamp)

      34

      10 A

      144

      Battery power supply (door lock 2)

      29

      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. Disconnect BCM connector.

      2. Check voltage between BCM harness connector and ground.

        +

        Voltage

        (Approx.)

        BCM

        Connector

        Terminal

        M84

        7

        Ground

        Battery voltage

        M20

        133

        135

        136

        138

        139

        144

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    Repair harness or connector.

  3. CHECK GROUND CIRCUIT

    1. Check continuity between BCM harness connector and ground.

      BCM

      Ground

      Continuity

      Connector

      Terminal

      M20

      137

      Yes

      129

    Is the inspection result normal?

    YES>>

    Inspection End.

    NO>>

    Repair harness or connector.

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