Antilock Brakes / Traction Control Systems: Description and Operation

GENERAL INFORMATION
Active Stability Control System (ASC) has been installed.
^ ASC is the system which has the function to ensure the stability at the limit of steering with TCL function as well as ABS (Anti-skid Brake System) and EBD (Electronic Brake-force Distribution). To realize that, the suction valve, cut valve and the pressure sensor have been added.
^ When TCL detects the slip of the driving wheel (ex. during start-up on low friction road), it automatically applies the brakes to the slipping driving wheel. At the same time, TCL reduces the engine output and prevents the wheel spin when it determines that the engine torque is too high for the road surface friction.
^ When the ASC-ECU determines that the vehicle is in a dangerous condition, it reduces the engine output and applies brake force to four wheels independently to control the vehicle behavior, avoiding the critical state.
^ ASC has been added to the transmission [twin clutch sport shift transmission (TC-SST)*1] and active center differential (ACD)*2 control, and the controls are integrated to improve the vehicle stability [Vehicles with AWD].
^ Hill Start Assist (HSA) function has been adopted to hold and prevent the roll back of the vehicle when the vehicle is on a slope and the foot is transferred from the brake pedal to the accelerator pedal [Vehicles with HSA].
^ By the integrated control with the anti-skid brake system (ABS), the system stabilizes the vehicle attitude and at the same time secures the driving force.

NOTE:
^ *1: For the details on twin clutch sport shift transmission (TC-SST), refer to Twin Clutch Sport Shift Transmission (TC-SST).
^ *2: For the details on active center differential (ACD), refer to Active Center Differential (ACD).

CONSTRUCTION DIAGRAM





MAIN COMPONENTS AND FUNCTIONS








SCHEMATIC DIAGRAM





ASC ELECTRICAL DIAGRAM

FWD





AWD