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Nissan Pathfinder Owners & Service Manuals

Nissan Pathfinder: System Description - System ++

Nissan Pathfinder (R53) 2022-2025 Service Manual / Cruise Control & Driver Assistance :: Driver Assistance System / Chassis Control :: System Description / System ++

System Description

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

  • Chassis control module 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
Active ride control function (if equipped) System Description
Automatic brake hold function System Description
Drive mode selector function System Description (2WD Models), System Description (4WD Models).

SYSTEM DIAGRAM

 

NOTE:

4WD control unit is applied to 4WD models.

 

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 via CAN communication.

  • Accelerator pedal position signal

  • Engine torque signal

  • Brake torque request signal

Mainly receives the following signals from chassis control module via CAN communication.

  • Drive mode signal
ABS actuator and electric unit (control unit)

Mainly transmits the following signals to chassis control module via CAN communication.

  • ABS operation signal

  • ABS malfunction signal

  • Brake hold status signal

  • Brake fluid pressure signal

  • Decel G sensor signal

  • Driver brake signal

  • Electric parking brake malfunction signal

  • Electric parking brake operation signal (switch)

  • Electric parking brake status 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

  • Steering angle sensor signal

  • TCS operation signal

  • TCS malfunction signal

  • VDC status signal

  • VDC malfunction signal

  • VDC OFF signal

  • VDC operation signal

  • Nissan Pathfinder Vehicle speed signal

Mainly receives the following signals from chassis control module via CAN communication.

  • Brake torque request signal

  • Yaw moment request signal

  • Drive mode signal
BCM

Mainly transmits the following signals to chassis control module via CAN communication.

  • Ignition ON signal

  • Brake pedal status signal

  • Seat belt buckle switch (driver side) signal

  • Drive mode select switch signal
TCM

Mainly transmits the following signals to chassis control module via CAN communication.

  • Current gear position signal
Combination meter

Mainly receives the following signals from chassis control module via CAN communication.

  • Automatic brake hold indicator lamp signal

  • Meter display signal

  • Drive mode signal
4WD control unit*

Mainly receives the following signals from chassis control module via CAN communication.

  • Drive mode signal
ADAS control unit 2

Mainly transmits the following signals to chassis control module via CAN communication.

  • Brake torque request signal

  • Yaw moment request signal

Mainly receives the following signals from chassis control module via CAN communication.

  • Drive mode signal
EPS control unit

Mainly receives the following signals from chassis control module via CAN communication.

  • Drive mode signal

  • Steering angle request signal

*: 4WD models

MAC (MESSAGE AUTHENTICATION CODE)

MAC (Message Authentication Code) is a function that prevents unauthorized communication from other than the ECU with MAC function by secure authentication communication. Chassis control module can write a MAC key required for communication between the ECUs and perform MAC diagnosis.

Fail-safe

When a malfunction occurs in the chassis control module, the master warning lamp turns ON and an interrupt is displayed on the information display of the combination meter.

DTC Fail-safe condition
C1B80-54

The following functions are suspended.

  • Intelligent trace control function

  • Active ride control function

  • Automatic brake hold function

  • Drive mode selector function
C1B81-55
C1B8F-82

The following functions are suspended.

  • Automatic brake hold function
C1B92-82

The following functions are suspended.

  • Intelligent trace control function

  • Active ride control function

  • Automatic brake hold function
C1B93-82

The following functions are suspended.

  • Intelligent trace control function

  • Active ride control function

  • Automatic brake hold function
C1B94-82

The following functions are suspended.

  • Automatic brake hold function
C1B96-82

The following functions are suspended.

  • Drive mode selector function
C1B97-82

The following functions are suspended.

  • Automatic brake hold function
C1BB4-44

The following functions are suspended.

  • Intelligent trace control function

  • Active ride control function

  • Automatic brake hold function

  • Drive mode selector function
C1BB4-45

The following functions are suspended.*

  • Intelligent trace control function

  • Active ride control function

  • Automatic brake hold function

  • Drive mode selector function
C1BB4-46
C1BB4-49

The following functions are suspended.

  • Intelligent trace control function

  • Active ride control function

  • Automatic brake hold function

  • Drive mode selector function
U0076-00

The following functions are suspended.*

  • Intelligent trace control function

  • Active ride control function

  • Automatic brake hold function

  • Drive mode selector function
U007A-00
U1327-52
U1327-54
U2140-57 -
U2140-83

The following functions are suspended.

  • Intelligent trace control function

  • Active ride control function

  • Automatic brake hold function
U2140-87
U214F-57 -
U214F-83

The following functions are suspended.

  • Automatic brake hold function
U214F-87

The following functions are suspended.

  • Automatic brake hold function

  • Drive mode selector function
U2152-57 -
U2152-83 Normal control
U2152-87

The following functions are suspended.

  • Drive mode selector function
U215B-83

The following functions are suspended.

  • Automatic brake hold function
U215B-87
U2165-57 -
U2248-83

The following functions are suspended.

  • Intelligent trace control function

  • Active ride control function

  • Automatic brake hold function
U2248-87
U2448-87

The following functions are suspended.

  • Intelligent trace control function

  • Active ride control function

  • Automatic brake hold function

  • Drive mode selector function
U2541-83

The following functions are suspended.

  • Automatic brake hold function
U2541-87
U2A03-88

The following functions are suspended.*

  • Intelligent trace control function

  • Active ride control function

  • Automatic brake hold function

  • Drive mode selector function
U2A0B-88
U2A0E-88

*: Depends on the DTC detection status

Intelligent Trace Control Function

System Description

  • This function senses driving based on the driver’s steering and acceleration/braking patterns, and controls brake pressure at individual wheels to aid tracing at corners and help smooth Nissan Pathfinder vehicle response.

  • Amount of brake control is changed based on drive mode select switch.

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

  • When intelligent trace control function is not functioning properly, the master warning lamp illuminates, and Warning message will also appear on information display.

    NOTE:

      • Intelligent trace control function is not always activated in any driving conditions.

      • When the intelligent trace control function is activated, the driver may feel some vibration on the brake pedal, hear operating sound, or have feel of the deceleration. This is not a malfunction because it is caused by intelligent trace control function that is normally operated.

     

OPERATION CHARACTERISTICS

  • Transient steering input - Reduces lag of yaw rate against steering operation.

    • The brake is controlled according to the steering operation condition of the driver and the cornering condition of the Nissan Pathfinder vehicle.

  • Acceleration at corners - Restrains understeer by applying the necessary amount of brake pressure to the inner wheels.

    • The brake is controlled according to the steering operation condition of the driver and the cornering condition of the Nissan Pathfinder vehicle.

  • Quick lane change - achieves stable Nissan Pathfinder vehicle behavior at quick steering operation by applying the necessary amount of brake pressure to the appropriate wheels.

    • The brake is controlled according to the steering operation condition of the driver and the cornering condition of the Nissan Pathfinder 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 via CAN communication.

  • Accelerator pedal position signal

  • Engine torque signal

  • Brake torque request signal
ABS actuator and electric unit (control unit)

Mainly transmits the following signals to chassis control module via CAN communication.

  • Front LH wheel speed signal

  • Front RH wheel speed signal

  • Rear LH wheel speed signal

  • Rear RH wheel speed signal

  • TCS operation signal

  • VDC operation signal

  • Side G sensor signal

  • VDC OFF signal

  • Brake fluid pressure signal

  • Steering angle sensor signal

  • VDC status signal

  • Driver brake signal

  • ABS malfunction signal

  • TCS malfunction signal

  • VDC malfunction signal

  • Nissan Pathfinder Vehicle speed signal

Mainly receives the following signals from chassis control module via CAN communication.

  • Brake torque request signal

  • Yaw moment request signal
Combination meter

Mainly receives the following signals from chassis control module via CAN communication.

  • Meter display signal
ADAS control unit 2

Mainly transmits the following signals to chassis control module via CAN communication.

  • Brake torque request signal

  • Yaw moment request signal

Active Ride Control Function (if Equipped)

System Description

  • Active ride control function senses upper body motion and controls four wheel brake pressure. This will enhance ride comfort in effort to restrain uncomfortable upper body movement when passing over undulated road surfaces.

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

  • When active ride control function is not functioning properly, the master warning lamp illuminates, and Warning message will also appear on information display.

    NOTE:

      • Active ride control function is not always activated in any driving conditions.

      • When the active ride control function is activated, the driver may feel some vibration on the brake pedal, hear operating sound, or have feel of the deceleration. This is not a malfunction because it is caused by active ride control function that is normally operated.

     

BRAKING CONTROL

  • Brake control - Enhances ride comfort by restraining upper body movement with small amount of brake control when driving on bumpy roads.

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 via CAN communication.

  • Accelerator pedal position signal
ABS actuator and electric unit (control unit)

Mainly transmits the following signals to chassis control module via CAN communication.

  • Front LH wheel speed signal

  • Front RH wheel speed signal

  • Rear LH wheel speed signal

  • Rear RH wheel speed signal

  • ABS operation signal

  • TCS operation signal

  • VDC operation signal

  • Nissan Pathfinder Vehicle speed signal

  • Decel G sensor signal

  • VDC OFF signal

  • Brake fluid pressure signal

  • VDC status signal

  • ABS malfunction signal

  • TCS malfunction signal

  • VDC malfunction signal

Mainly receives the following signals from chassis control module via CAN communication.

  • Brake torque request signal
Combination meter

Mainly receives the following signals from chassis control module via CAN communication.

  • Meter display signal

Information Display (combination Meter)

Chassis Control Warning

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 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 is ON

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

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Nissan Pathfinder (R53) 2022-2025 Service Manual

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