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 vehicle response.
• Amount of brake control is changed based on drive mode select switch.
• When the turn OFF the VDC function, active trace control function is also turned OFF.
• When active trace control function is not functioning properly, the master warning lamp illuminates, and Warning message will also appear on information display.
  NOTE:

  • Always drive carefully and attentively.
  • Active trace control function is not always activated in any driving conditions.
  • When the active 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 active trace control function that is normally operated.

OPERATION CHARACTERISTICS 

Active trace control helps enhance the transition from braking into and then accelerating out of corners. Active trace control utilizes the vehicle's ABS actuator and electric unit (control unit) system to help improve cornering feel by automatically applying brakes. Furthermore, active trace control will apply selective braking to help create increased steering response in S-turns. For example, if driving through an S-turn that starts with steering to the right, the right-side brakes are engaged to create a yaw moment and help turn the vehicle.

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

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

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

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

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

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

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SYSTEM DIAGRAM 

NOTE: AWD control unit is applied to AWD models.

Courtesy of NISSAN

INPUT SIGNAL AND OUTPUT SIGNAL 

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

*: AWD models