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Home › Kia › 2016 › Forte LX, Automatic Trans › Repair and Diagnosis › Brakes › Traction Control › Electronic Stability Control (ESC) System › Description And Operation › Description Of ESC › ESC Operation Mode

ESC Operation Mode

  1. STEP 1

    The ESC analyzes the intention of the driver.

    Fig 1: ESC Operation Mode Procedure Chart (STEP 1)
    G11795805Courtesy of KIA MOTORS AMERICA, INC.
  2. STEP 2

    It analyzes the movement of the ESC vehicle.

    Fig 2: ESC Operation Mode Procedure Chart (STEP 2)
    G11795806Courtesy of KIA MOTORS AMERICA, INC.
  3. STEP 3

    The HECU calculates the required strategy, then actuates the appropriate valves and sents torque control requests via CAN to maintain vehicle stability.



  1. ESC Non-operation-Normal braking.
      Inlet valve(IV) Outlet valve(OV) Traction Control Valve (TCV) High pressure switch valve(HSV) Return pump
    Normal braking Open Close Open Close OFF
    Fig 1: ESC Operation Mode Communication Diagram (ESC Non-Operation-Normal Braking)
    G11795807Courtesy of KIA MOTORS AMERICA, INC.
    NOTE: IV: Inlet Valve
    OV: Outlet Valve
    RL: Rear left wheel
    FR: Front right wheel
    FL: Front left wheel
    RR: Rear right wheel
    RP: Return pump
    TCV: Traction Control Valve
    HSV: High pressure Switch Valve
  2. ESC Increase Mode
      Inlet valve(IV) Outlet valve(OV) Traction Control Valve (TCV) High pressure switch valve(HSV) Return pump
    Normal braking Open Close Close(Partial) Open ON(Motor speed control)
    Fig 2: ESC Operation Mode Communication Diagram (Hold Mode; FR Only Controlled)
    G11795808Courtesy of KIA MOTORS AMERICA, INC.
    NOTE: IV: Inlet Valve
    OV: Outlet Valve
    RL: Rear left wheel
    FR: Front right wheel
    FL: Front left wheel
    RR: Rear right wheel
    RP: Return pump
    TCV: Traction Control Valve
    HSV: High pressure Switch Valve
  3. ESC Hold Mode (FR is only controlled.)
      Inlet valve(IV) Outlet valve(OV) Traction Control Valve (TCV) High pressure switch valve(HSV) Return pump
    Normal braking Close Close Close(Partial) Open OFF
    Fig 3: ESC Operation Mode Communication Diagram (Decrease Mode; FR Only Controlled)
    G11795809Courtesy of KIA MOTORS AMERICA, INC.
    NOTE: IV: Inlet Valve
    OV: Outlet Valve
    RL: Rear left wheel
    FR: Front right wheel
    FL: Front left wheel
    RR: Rear right wheel
    RP: Return pump
    TCV: Traction Control Valve
    HSV: High pressure Switch Valve
  4. ESC Decrease Mode (FR is only controlled)
      Inlet valve(IV) Outlet valve(OV) Traction Control Valve (TCV) High pressure switch valve(HSV) Return pump
    Normal braking Close Open Close(Partial) Open ON(Motor speed low control)
    Fig 4: ESC Operation Mode Communication Diagram
    G11795810Courtesy of KIA MOTORS AMERICA, INC.
    NOTE: IV: Inlet Valve
    OV: Outlet Valve
    RL: Rear left wheel
    FR: Front right wheel
    FL: Front left wheel
    RR: Rear right wheel
    RP: Return pump
    TCV: Traction Control Valve
    HSV: High pressure Switch Valve
    Fig 5: ABS Warning Lamp
    G11795811Courtesy of KIA MOTORS AMERICA, INC.
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