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Nissan Sentra B18 (2020-2025) Service Manual: Hazard Switch Circuit

Component Function Check

Component Function Check

  1. CHECK HAZARD SWITCH SIGNAL

    1. CONSULT

      1. Ignition switch ON.

      2. Select “HAZARD SW” in “Data Monitor” mode of “BCM(FLASHER)”.

      3. With operating the hazard switch, check the monitor status.

        Monitor item

        Condition

        Monitor status

        HAZARD SW

        Hazard switch

        ON

        On

        OFF

        Off

    Is the inspection result normal?

    YES >>

    Hazard switch circuit is normal.

    NO >>

    Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK HAZARD SWITCH SIGNAL

      1. Ignition switch OFF.

      2. Disconnect hazard switch connector.

      3. Check voltage between hazard switch harness connector and ground.

        +

        -

        Voltage

        (Approx.)

        Hazard switch

        Connector

        Terminal

        M102

        2

        Ground

        Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    GO TO 2.

  2. CHECK HAZARD SWITCH SIGNAL CIRCUIT (OPEN)

      1. Disconnect BCM connector.

      2. Check continuity between hazard switch harness connector and BCM harness connector.

        Hazard switch

        BCM

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M102

        2

        M84

        13

        Yes

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair or replace harness.

  3. CHECK HAZARD SWITCH SIGNAL CIRCUIT (SHORT)

    1. Check continuity between hazard switch harness connector and ground.

      Hazard switch

      —

      Continuity

      Connector

      Terminal

      M102

      2

      Ground

      No

    Is the inspection result normal?

    YES >>

    Replace BCM. Refer to Removal and Installation.

    NO >>

    Repair or replace harness.

  4. CHECK HAZARD SWITCH GROUND CIRCUIT

    1. Check continuity between hazard switch harness connector and ground.

      Hazard switch

      —

      Continuity

      Connector

      Terminal

      M102

      3

      Ground

      Yes

    Is the inspection result normal?

    YES >>

    GO TO 5.

    NO >>

    Repair or replace harness.

  5. CHECK HAZARD SWITCH

    1. Check hazard switch. Refer to Component Inspection.

    Is the inspection result normal?

    YES>>

    Inspection End.

    NO>>

    Replace hazard switch. Refer to Removal and Installation.

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