TCS Function

SYSTEM

TCS FUNCTION : System Description






- Wheel spin status of drive wheel is detected by wheel sensor of 4
wheels. Engine/traction motor output and transmission shift status is controlled so that slip rate of drive wheels is in appropriate level.
When wheel spin occurs on drive wheel, ABS actuator and electric unit (control unit) perform brake force control of LH and RH drive wheels (apply brake force by increasing brake fluid pressure of drive wheel) and decrease engine /traction motor torque by engine/traction motor torque control. Wheel spin amount decreases. Engine/traction motor torque is controlled to appropriate level.
- TCS function can be switched to non-operational status (OFF) by operating VDC OFF switch. In this case, VDC OFF indicator lamp turns ON.
- VDC warning lamp blinks while TCS function is in operation and indicates to the driver that the function is in operation.
- CONSULT can be used to diagnose the system diagnosis.
- Fail-safe function is adopted. When a malfunction occurs in TCS
function, the control is suspended for VDC function, TCS function, brake limited slip differential (BLSD) function, brake assist function and Brake force distribution function. The vehicle status becomes the same as models without VDC function, TCS function, brake limited slip differential (BLSD) function, brake assist function and
Brake force distribution function. However, ABS function and EBD
function are operated normally. Fail Safe.

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)