GENERAL INFORMATION




  • When TCL detects the slip of the driving wheel (ex. during startup on low µ road), it automatically applies the brakes to the slipping driving wheel. At the same time, TCL reduces the electric motor unit output and prevents the wheel spin when it determines that the electric motor unit torque is too high for the road surface µ.
  • When the ASC determines that the vehicle is in a dangerous condition, it reduces the electric motor unit output and applies brake force to four wheels independently to control the vehicle behaviour, avoiding the critical state.
note By the integrated control with the anti-lock brake system (ABS), the system stabilises the vehicle attitude and at the same time secures the driving force.

CONSTRUCTION DIAGRAM





MAIN COMPONENTS AND FUNCTIONS
Name of part
 Number
 Functional description
Sensor
 Wheel speed sensor
 1
 Outputs the frequency signal in proportion to the rotation speed of each wheel to ASC-ECU.
Magnetic encoder for wheel speed detection
 2
 The wheel speed sensor is a pulse generator. When the magnetic encoder for wheel speed detection (a plate on which north and south pole sides of the magnets are arranged alternately) rotates, it outputs frequency pulse signal in proportion to each wheel speed.
Stop lamp switch
 3
 Outputs the signal indicating whether the brake pedal is depressed or not to ASC-ECU.
G and yaw rate sensor
 4
 Detects and lateral acceleration of a vehicle, and outputs signal to ASC-ECU via the CAN line.
Steering wheel sensor
 5
 Detects the steering angle of the steering wheel, and outputs signal to ASC-ECU via the CAN bus line.
ASC OFF switch
 6
 Outputs the ON/OFF signal for ASC to ASC-ECU.
Brake fluid pressure sensor
 7
 Integrated into the hydraulic unit, and outputs the signal for the brake fluid pressure in the master cylinder to ASC-ECU.
Actuator
 Hydraulic unit
 8
 Drives the solenoid valve using the signal from ASC-ECU, and controls the brake fluid pressure for each wheel.
ABS warning lamp
 9
 Informs the driver of the system status by illuminating, flashing, or turning off the ABS warning lamp according to the signal from ASC-ECU.
Brake warning lamp
 10
 Used as the brake warning lamp for the parking brake, brake fluid level, and EBD control. Informs the driver of the system status by illuminating or turning off the brake warning lamp according to the signal from ASC-ECU.
ASC indicator lamp
 11
 Informs the driver of the system status by flashing when the system operates according to the signal from ASC-ECU.
ASC OFF lamp
 12
 Informs the driver of the system shutdown by illuminating by the signal from ASC-ECU.
Diagnosis connector
 13
 Sets the diagnosis code and establishes the communication with M.U.T.-III.

    EV-ECU

 14
 Controls the electric motor unit output based on the signal from ASC-ECU.
ASC control unit (ASC-ECU)
 15
 Controls the actuators (hydraulic unit) based on the signals sent from sensors.
Controls the self-diagnostic function and fail-safe function.
Controls diagnostic function (Compatible with M.U.T.-III).

SYSTEM CONFIGURATION




note
    Dashed lines indicate the CAN bus communication lines.

ASC ELECTRICAL DIAGRAM