Brake Assist Function

SYSTEM

BRAKE ASSIST FUNCTION : System Description

- When the driver brakes hard in an emergency, the stopping distance is reduced by increasing brake fluid pressure.
- Fail-safe function is adopted. When a malfunction occurs in brake assist function, the control is suspended for VDC function, TCS function, brake limited slip differential (BLSD) function and brake assist function. The vehicle status becomes the same as models without VDC function, TCS function, brake limited slip differential (BLSD) function and brake assist function. However, ABS function and EBD function are operated normally. Refer to "Fail-safe" ABS Actuator And Electric Unit (Control Unit).

SYSTEM DIAGRAM







INPUT SIGNAL AND OUTPUT SIGNAL

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










*1: Communication line between yaw rate/side/decel G sensor and ABS actuator and electric unit (control unit)
*2: Communication line between electrically-driven intelligent brake unit and ABS actuator and electric unit (control unit)