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Nissan Sentra B18 (2020-2025) Service Manual: Driver Assistance Buzzer Circuit

Component Function Check

Component Function Check

  1. CHECK DRIVER ASSISTANCE BUZZER

    CONSULT

    1. Select “ADAS buzzer 2” in “Active Test” mode of “ICC/ADAS 2”.

    2. Check that the function operates normally.

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK DRIVER ASSISTANCE BUZZER POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.

    2. Disconnect the driver assistance buzzer harness connector.

    3. Turn ignition switch ON.

    4. Check voltage between the driver assistance buzzer harness connector and ground.

      Terminal

      Voltage

      (Approx.)

      (+)

      (−)

      Driver assistance buzzer

      Ground

      Connector

      Terminal

      M149

      1

      Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Repair the driver assistance buzzer power supply circuit.

  2. CHECK DRIVER ASSISTANCE BUZZER CONTROL CIRCUIT

    1. Turn ignition switch OFF.

    2. Disconnect the ADAS control unit 2 harness connector.

    3. Check continuity between the ADAS control unit 2 harness connector and driver assistance buzzer harness connector.

      ADAS control unit 2

      Driver assistance buzzer

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M148

      1

      M149

      1

      Yes

    4. Check continuity between the ADAS control unit 2 harness connector and ground.

      ADAS control unit 2

      Ground

      Continuity

      Connector

      Terminal

      M148

      13

      No

    Is the inspection result normal?

    YES >>

    Replace the driver assistance buzzer. Refer to Removal and Installation.

    NO >>

    Repair the harness or connector.

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