S Nissan Sentra Manuals Library
Factory-style information for owners and repair work

Nissan Sentra techinfo

Find Nissan Sentra owner information, maintenance instructions, technical references, service procedures and useful repair pages in one clean online library.

Quick access Sentra Docs
B18 Owner's 2020-2025 Sentra owner information B18 Service 2020-2025 Sentra Workshop manual B17 Owner's 2013-2019 Sentra owner documentation B17 Service 2013-2019 Sentra service information

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.

    Right/left Switching Signal Circuit
    Diagnosis Procedure Diagnosis Procedure CHECK CONNECTOR Turn the ignition switch OFF. Check the terminals and connectors of the side radar RH for damage, bend and short (unit si...

    Other materials:

    Power Window Lock Switch
    Description Description Ground circuit of main power window and door lock/unlock switch shuts off if power window lock switch of main power window and door lock/unlock switch is operated. This inhibits all operation, except for the main switch. Component Function Check Component Funct ...

    LATCH (Lower Anchors and Tethers for CHildren) system
    LATCH system lower anchor locations Your Nissan Sentra is equipped with dedicated anchor points designed for use with LATCH system–compatible child restraints. This system may also be referred to as ISOFIX or ISOFIX-compatible. When using the LATCH system, a vehicle seat belt is not req ...

    Diagnostic Can Communication Circuit
    Diagnosis Procedure Diagnosis Procedure CONNECTOR INSPECTION Turn the ignition switch OFF. Disconnect the battery cable from the negative terminal. Check the following terminals and ...