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Nissan Sentra B18 (2020-2025) Service Manual: Accessory Relay-1

Nissan Sentra B18 (2020-2025) Service Manual / Electrical & Power Control / Power Control System :: Power Distribution System / Dtc/circuit Diagnosis / Accessory Relay-1

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK ACCESSORY RELAY-1 POWER

      1. Disconnect accessory relay-1 connector.

      2. Check voltage between accessory relay-1 harness connector and ground.

        Accessory relay-1

        —

        Voltage

        (Approx.)

        Connector

        Terminal

        J-5

        2

        Ground

        Battery voltage

        5

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Repair or replace harness or connectors.

  2. CHECK ACCESSORY RELAY-1 CONTROL SIGNAL VOLTAGE

      1. Connect accessory relay-1 connector.

      2. Check voltage between BCM harness connector and ground.

        +

        —

        Condition

        Voltage

        (Approx.)

        BCM

        Connector

        Terminal

        M84

        34

        Ground

        Ignition switch

        OFF

        Battery voltage

        ON

        0 V

    Is the inspection result normal?

    YES >>

    GO TO 4

    NO >>

    GO TO 3.

  3. CHECK ACCESSORY RELAY-1 CONTROL SIGNAL CIRCUIT

      1. Ignition switch OFF.

      2. Disconnect BCM connector and accessory relay-1 connector.

      3. Check continuity between BCM harness connector and accessory relay-1 harness connector.

        BCM

        Accessory relay-1

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M84

        34

        J-5

        1

        Yes

      4. Check continuity between BCM harness connector and ground.

        BCM

        Ground

        Continuity

        Connector

        Terminal

        M84

        34

        No

    Is the inspection result normal?

    YES >>

    Replace BCM. Refer to Removal and Installation.

    NO >>

    Repair or replace harness or connectors.

  4. CHECK ACCESSORY RELAY-1

    1. Check accessory relay-1. Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    Refer to Intermittent Incident.

    NO >>

    Replace accessory relay-1.

Component Inspection

Component Inspection

  1. CHECK ACCESSORY RELAY-1

      1. Ignition switch OFF.

      2. Disconnect accessory relay-1 connector.

      3. Check continuity between accessory relay-1 terminals.

      Accessory relay-1

      Condition

      Continuity

      Terminals

      12 V direct current supply between terminals and .

      Yes

      No current supply

      No

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Replace accessory relay-1.

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