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: System

System Description

System Description

SYSTEM DIAGRAM

Component

Function

ADAS control unit 2

ADAS Control Unit 2

ECM

Component Description

TCM

TCM

Steering angle sensor

Steering Angle Sensor

Combination meter

Combination Meter(4.2 inch Information Display) or Combination Meter(7 inch Information Display)

ABS actuator and electric unit (control unit)

ABS Actuator and Electric Unit (Control Unit)

Stop lamp switch

Stop Lamp Switch

Driver assistance buzzer

Driver Assistance Buzzer

Sonar control unit

Sonar Control Unit

ADAS CONTROL UNIT 2 INPUT/OUTPUT SIGNAL ITEM

Input Signal Item

Transmit unit

Signal name

Description

ECM

CAN communication

Closed throttle position signal

Receives idle position state (ON/OFF)

Accelerator pedal position signal

Receives accelerator pedal position (angle)

Engine speed signal

Receives engine speed

Stop lamp switch signal

Receives an operational state of the brake pedal

TCM*

CAN communication

Input speed signal

Receives the number of revolutions of input shaft

Current gear position signal

Receives a current gear position

Shift position signal

Receives a selector lever position

Output shaft revolution signal

Receives the number of revolutions of output shaft

ABS actuator and electric unit (control unit)

CAN communication

ABS malfunction signal

Receives a malfunction state of ABS

TCS malfunction signal

Receives a malfunction state of TCS

VDC malfunction signal

Receives a malfunction state of VDC

Nissan Sentra Vehicle speed signal (ABS)

Receives wheel speeds of four wheels

Brake fluid pressure signal

Receives brake fluid pressure

Steering angle sensor

CAN communication

Steering angle sensor signal

Receives the number of revolutions, turning direction of the steering wheel

Combination meter

CAN communication

System selection signal

Receives a selection state of each item in “Emergency Brake” selected with the combination meter

Sonar control unit

CAN communication

Sonar sensor signal

Receives obstacle information (existence & distance)

*: CVT models

Output Signal Item

Reception unit

Signal name

Description

ECM

CAN communication

Torque down request signal

Transmits a signal to control the engine torque.

Stop lamp request signal

Transmits a signal to activates the stop lamp.

ABS actuator and electric unit (control unit)

CAN communication

Brake fluid pressure control signal

Transmits a brake fluid pressure control signal to activates the brake

Combination meter

CAN communication

Meter display signal

Transmits a signal to display a state of the system on the information display

RAB warning lamp signal

  • Transmits a signal to illuminate RAB warning lamp

  • Transmits an ON/OFF state of the RAB

Driver assistance buzzer

Driver assistance buzzer signal

Transmits a driver assistance buzzer signal to active the buzzer

FUNCTION DESCRIPTION

  • The Rear Automatic Braking system can assist the driver when the Nissan Sentra vehicle is backing up and approaching objects directly behind the vehicle.

  • When the shift lever is in the R (Reverse) position and the Nissan Sentra vehicle speed is less than approximately 15 km/h (7 MPH), the RAB system operates.

  • The RAB system detects obstacles behind the Nissan Sentra vehicle using the sonar sensors.

  • If a risk of a collision with an obstacle is detected when own Nissan Sentra vehicle is backing up, the RAB system warning indicator will flash in the vehicle information display, and the system will chime three times.

  • The system will then automatically apply the brakes.

    Note:

    • After the automatic brake application, the driver must depress the brake pedal to maintain brake pressure.

    • Driver can temporarily cancel the sonar function in the Nissan Sentra vehicle, but the RAB system will continue to operate.

OPERATION DESCRIPTION

  • Sonar detects a object approaching, and transmits the object detection signal to ADAS control unit 2 via CAN communication.

  • The ADAS control unit 2 performs the following operations according to the degree of possibility of a collision.

    • Transmits the driver assistance buzzer signal to the ADAS control unit 2 and sounds the warning system buzzer.

    • Transmits the meter display signal to the combination meter and displays the RAB system warning indicator.

    • Transmits the brake fluid pressure control signal to the ABS actuator and electric unit (control unit) via chassis control module and performs the brake control.

    • Transmits the stop lamp request signal to ECM and turn ON the stop lamp.

Note:

  • ON/OFF of RAB system is performed with the combination meter.

  • The RAB system will be automatically turned ON when the engine is restarted.

Operation Condition

ADAS control unit 2 performs the control when the following conditions are satisfied.

  • When the RAB system setting on the combination meter is ON.

  • When the Nissan Sentra vehicle speed is below approximately 15 km/h (9 MPH).

  • There is a possibility of a collision with the object backward.

No Operation Condition

The ADAS control unit 2 is not operate when the system is under the conditions of the no operation condition.

  • When the RAB system setting on the combination meter is OFF.

  • When the Nissan Sentra vehicle speed is above approximately 15 km/h (9 MPH).

  • When the object backward is not detected

Operation Cancellation Condition

The ADAS control unit 2 cancels the operation when the system is under any conditions of the operation cancellation condition.

  • When the system judges that the Nissan Sentra vehicle comes to a standstill by the system control.

  • When the system malfunction occurs.

  • When the sonar area of the rear bumper is dirty and the measurement of the distance between the object becomes difficult.

Fail-Safe (adas Control Unit 2)

Fail-safe (ADAS Control Unit 2)

Refer to Fail-safe (ADAS Control Unit 2).

Warning Lamp/indicator Lamp

Warning Lamp/Indicator Lamp

Warning Lamp/Indicator Lamp

Name

Design

Function

RAB warning lamp

  • The RAB warning lamp warns the driver that RAB system is OFF.

  • The RAB warning lamp warns the driver of a malfunction in the RAB system.

  • For layout, Refer to Design(4.2 inch Information Display) or Design(7 inch Information Display)
    Component Parts
    Rear Automatic Braking System Component Parts Location Component Parts Location A. Right side of instrument panel (view with glove box assembly removed) B. RH side of engine com...
    Operation
    4.2 Inch Information Display Operation Operation SWITCH NAME AND FUNCTION No. Switch name Description Steering switch Using the steering switch, select the [Settings] menu in th...

    Other materials:

    Clutch. Removal and Installation
    Clutch Pedal Exploded View Exploded View 1. Clutch pedal 2. Clutch master cylinder     ...

    Secondary Pressure Solenoid Valve Circuit
    Diagnosis Procedure Diagnosis Procedure CHECK HARNESS CONNECTOR Ignition switch OFF. Check the mating condition of TCM harness connector and CVT unit harness connector. Is the inspect ...

    Interior Lighting System. Symptom Diagnosis. Interior Lighting System Symptoms. Symptom Table
    Interior Lighting System Symptoms. Symptom Table Symptom Table Symptom Table Note: Perform the self-diagnosis with CONSULT before the symptom diagnosis. Perform the trouble diagnosis if any DTC is detected. Symptom ...