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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

  • Chassis control to integrally control the driving system was adopted.

  • Chassis control module (with built in steering angle sensor) inputs the necessary information for control from CAN communication and each switch and integrally controls each system. Refer to the following table for systems controlled and input output signals.

Function

Reference page

Intelligent trace control function

System Description

Intelligent engine brake function

System Description

Active ride control function

System Description

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication lines is shown in the following table.

Component parts

Signal description

ECM

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • Accelerator pedal position signal

  • Engine speed signal

  • Estimate drive torque signal

  • Request drive torque signal

  • Request drive torque status signal

ABS actuator and electric unit (control unit)

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • ABS operation signal

  • Brake fluid pressure signal

  • Decel G sensor signal

  • Front LH wheel speed signal

  • Front RH wheel speed signal

  • Rear LH wheel speed signal

  • Rear RH wheel speed signal

  • Side G sensor signal

  • TCS operation signal

  • VDC accept permission signal

  • VDC operation signal

  • VDC OFF signal

  • Nissan Sentra Vehicle speed signal

  • Steering angle sensor signal

  • Stop lamp switch signal

Mainly receives the following signals from chassis control module (with built in steering angle sensor) via CAN communication.

  • Intelligent trace control signal

  • Active ride control signal

TCM

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • Current gear position signal

  • CVT accept permission signal

Mainly receives the following signals from chassis control module (with built in steering angle sensor) via CAN communication.

  • Intelligent engine brake signal

BCM

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • Stop lamp switch signal

IPDM E/R

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • Ignition switch ON signal

Combination meter

Mainly receives the following signals from chassis control module (with built in steering angle sensor) via CAN communication.

  • Meter display signal

Fail-Safe [chassis Control Module (with Built in Steering Angle Sensor)]

Fail-Safe [Chassis Control Module (With Built In Steering Angle Sensor)]

DTC

Fail-safe condition

C1B80-54

The following functions are suspended.

  • Intelligent trace control function

  • Intelligent engine brake function

  • Active ride control function

C1B92-82

The following functions are suspended.

  • Intelligent trace control function

  • Active ride control function

C1B96-82

Normal control

C1BB4-44

The following functions are suspended.

  • Intelligent trace control function

  • Intelligent engine brake function

  • Active ride control function

C1BB4-46

C1BB4-47

C1BB4-49

C1BB4-52

C1BB5-1C

U0076-00

U0078-00

U1A4A-87

U2140-87

U2141-87

U2148-83

U2148-87

U214E-87

Normal control

U214F-87

U215B-87

U2252-83

Intelligent Trace Control Function

System Description

System Description

  • The steering operation condition by the driver and the information from multiple sensors are computed by the chassis control module (with built in steering angle sensor), and a command is transmitted to the ABS actuator and electric unit (control unit).

  • The ABS actuator and electric unit (control unit) controls the brake based on the command from the chassis control module (with built in steering angle sensor).

  • When cornering, driver operation is reduced and Nissan Sentra vehicle behavior is smoothened.

  • When the VDC function is turned OFF, the intelligent trace control function is also completely turned OFF.

  • When a malfunction occurs in intelligent trace control function, the master warning lamp illuminates and the information display in the combination meter informs the driver.

Note:

  • Intelligent trace control function may not be effective in all driving environments (traction conditions, etc.).

  • When intelligent trace control function operates, vibration may be transmitted to the brake pedal, an operation sound may be heard, and a feeling of deceleration may be felt. These are not symptoms of malfunctions and indicate normal operating conditions.

OPERATION CHARACTERISTICS

  • This performs assistance when switching from deceleration (brake operation) to acceleration (accelerator operation) when driving on a curve. It operates the brake automatically to stabilize cornering and smoothens acceleration in the longitudinal and lateral directions.
    • The brake is controlled according to the steering operation condition of the driver and the cornering condition of the Nissan Sentra vehicle.
  • For the purpose of improving responsiveness during excessive steering operation, such as emergency avoidance steering, etc., the brake is applied to the inside wheel of the steering direction and causes turning momentum to be generated.
    • The brake is controlled according to the steering operation condition of the driver.
  • When driving on a curve, change of the steering operation angle is controlled, Nissan Sentra vehicle movement is smoothened and cornering with a stable feeling is realized simultaneously by controlling the brake on the inner wheel, according to accelerator operation.
    • The brake is controlled according to the steering operation condition of the driver and the cornering condition of the Nissan Sentra vehicle.
  • When performing quick lane changes and other excessive steering operations, the brake is operated automatically, and erratic Nissan Sentra vehicle behavior due to steering operation is reduced.
    • The brake is controlled according to the steering operation condition of the driver and the cornering condition of the Nissan Sentra vehicle.

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication lines is shown in the following table.

Component parts

Signal description

ECM

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • Accelerator pedal position signal

  • Engine speed signal

  • Estimate drive torque signal

  • Request drive torque signal

  • Request drive torque status signal

ABS actuator and electric unit (control unit)

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • Brake fluid pressure signal

  • Front LH wheel speed signal

  • Front RH wheel speed signal

  • Rear LH wheel speed signal

  • Rear RH wheel speed signal

  • Side G sensor signal

  • TCS operation signal

  • VDC accept permission signal

  • VDC OFF signal

  • VDC operation signal

  • Steering angle sensor signal

Mainly receives the following signals from chassis control module (with built in steering angle sensor) via CAN communication.

  • Intelligent trace control signal

TCM

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • Current gear position signal

BCM

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • Stop lamp switch signal

Combination meter

Mainly receives the following signals from chassis control module (with built in steering angle sensor) via CAN communication.

  • Meter display signal

Intelligent Engine Brake Function

System Description

System Description

  • The steering operation condition by the driver and the information from multiple sensors are computed by the chassis control module (with built in steering angle sensor), and a command is transmitted to the TCM.

  • Based on the command from the chassis control module (with built in steering angle sensor), TCM shifts the gear ratio of the transaxle to the low side and applies the engine brake.

  • When the VDC function is turned OFF, the intelligent engine brake function is also completely turned OFF.

  • When a malfunction occurs in intelligent engine brake function, the master warning lamp illuminates and the information display in the combination meter informs the driver.

Note:

  • Intelligent engine brake function may not be effective in all driving environments (traction conditions, etc.).

  • When intelligent engine brake function operates, the needle of the tachometer will rise up, you may hear an engine noise and sense slight deceleration. These are not symptoms of malfunctions and indicate normal operating conditions.

CORNERING CONTROL

  • For the purpose of reducing the operation of switching to depress the brake pedal during cornering, the operation information of the driver is computed by the chassis control module (with built in steering angle sensor) and a command is transmitted to TCM.

  • Based on the command from the chassis control module (with built in steering angle sensor) , TCM shifts the gear ratio of the transaxle to the low side and applies the engine brake.
    • The transaxle is controlled according to the steering operation of the driver, as well as the accelerator pedal condition and cornering condition of the Nissan Sentra vehicle.

BRAKING CONTROL

  • For the purpose of improving the feeling of effectiveness of the brake when decelerating, the brake operation amount of the driver is computed by the chassis control module (with built in steering angle sensor) and a command is transmitted to TCM.

  • Based on the command from the chassis control module (with built in steering angle sensor), TCM shifts the gear ratio of the transaxle to the low side and applies the engine brake.
    • The transaxle is controlled according to the brake condition.

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication lines is shown in the following table.

Component parts

Signal description

ECM

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • Accelerator pedal position signal

ABS actuator and electric unit (control unit)

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • Brake fluid pressure signal

  • Front LH wheel speed signal

  • Front RH wheel speed signal

  • Rear LH wheel speed signal

  • Rear RH wheel speed signal

  • Side G sensor signal

  • VDC accept permission signal

  • VDC operation signal

  • Steering angle sensor signal

  • ABS operation signal

  • Stop lamp switch signal

TCM

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • CVT accept permission signal

Mainly receives the following signals from chassis control module (with built in steering angle sensor) via CAN communication.

  • Intelligent engine brake signal

BCM

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • Stop lamp switch signal

Combination meter

Mainly receives the following signals from chassis control module (with built in steering angle sensor) via CAN communication.

  • Meter display signal

Active Ride Control Function

System Description

System Description

  • The driving condition and the information from multiple sensors are computed by the chassis control module (with built in steering angle sensor), and a command is transmitted to the ABS actuator and electric unit (control unit).

  • The ABS actuator and electric unit (control unit) control the brake based on the command from the chassis control module (with built in steering angle sensor).

  • When the VDC function is turned OFF, the active ride control function is also completely turned OFF.

  • When a malfunction occurs in active ride control function, the master warning lamp illuminates and the information display in the combination meter informs the driver.

    Note:

    • Active ride control function may not be effective in all driving environments (traction conditions, etc.).

    • When active ride control function operates, vibration may be transmitted to the brake pedal, an operation sound may be heard, and a feeling of deceleration may be felt. These are not symptoms of malfunctions and indicate normal operating conditions.

OPERATION CHARACTERISTICS

  • When driving on an uneven road surface, mainly the rotation speed information of each wheel is computed by the chassis control module (with built in steering angle sensor) to estimate vertical G, and a command is transmitted to the ABS actuator and electric unit (control unit).

  • The ABS actuator and electric unit (control unit) control brake fluid pressure (brake force) according to the command from the chassis control module (with built in steering angle sensor).

  • By controlling the brake fluid pressure (brake force), behavior of the Nissan Sentra vehicle in the vertical direction decreases, and riding comfort is improved.
    • Brake fluid pressure (brake force) is controlled according to driving conditions.

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication lines is shown in the following table.

Component parts

Signal description

ECM

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • Accelerator pedal position signal

ABS actuator and electric unit (control unit)

Mainly transmits the following signals to chassis control module (with built in steering angle sensor) via CAN communication.

  • ABS operation signal

  • Brake fluid pressure signal

  • Decel G sensor signal

  • Front LH wheel speed signal

  • Front RH wheel speed signal

  • Rear LH wheel speed signal

  • Rear RH wheel speed signal

  • TCS operation signal

  • VDC accept permission signal

  • VDC operation signal

  • Nissan Sentra Vehicle speed signal

Mainly receives the following signals from chassis control module (with built in steering angle sensor) via CAN communication.

  • Active ride control signal

Combination meter

Mainly receives the following signals from chassis control module (with built in steering angle sensor) via CAN communication.

  • Meter display signal

Information Display (combination Meter)

Chassis Control Display

Chassis Control Display

DESIGN/PURPOSE

The warning message is displayed on the information display when “Chassis Control” detected the system malfunction.

Warning Message

Design

Warning message

—

Chassis Control

System Error

See Owner’s Manual

SYNCHRONIZATION WITH MASTER WARNING LAMP

Applicable

SYNCHRONIZATION WITH WARNING CHIME

Not applicable

SYSTEM DIAGRAM

SIGNAL PATH

  • The chassis control module (with built in steering angle sensor) transmits the meter display signal to the combination meter via CAN communication.

  • The combination meter shows the chassis control warning on the information display, according to the signal.

WARNING MESSAGE DISPLAY CONDITION

When all of the following conditions are satisfied.

  • Ignition switch ON

  • Chassis control system malfunction is detected. Refer to DTC Index.

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