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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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