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Home >> Kia >> 2018 >> Optima EX >> Repair and Diagnosis (Single Page) >> Body & Frame >> Ignition Switch/Steering Lock >> Button Engine Start System (Except HEV) >> Description And Operation >> Description >> Operation For Each Function Of Button Starting
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Operation For Each Function Of Button Starting

  1. Electric power ON/Ignition ON
    • The electric power is changed through OFF → ACC→IGN→OFF by pressing the button without stepping on the brake (Or with stepping on the brake) inside the car with FOB key (However, repeat ACC↔IGN when it is not in P. Converting to OFF is impossible.)
    • The starting is ignited when the button is pressed with stepping on the brake at P/N position with FOB key.
    Fig 1: Button Starting Function Chart - Electric Power ON And Ignition ON
    G12143086Courtesy of KIA MOTORS AMERICA, INC.
  2. Electric power OFF/Ignition OFF
    • The ignition OFF is possible in the state of vehicle stop. (Ignition OFF is possible in any position of ATM lever.)
    • The lever shall be shifted for parking in gear N by pressing the ATM lever release button after electric power off in P.
    Fig 2: Button Starting Function Chart - Electric Power OFF And Ignition OFF
    G12143087Courtesy of KIA MOTORS AMERICA, INC.
  3. How to off the ignition forcibly and to restart while driving
    • Method to stop engine forcibly if vehicle has emergency (e.g. Fuel leaking or Unintended acceleration).
    • The engine is turned off and returns to ACC state if the button is long pressed for 2 seconds or pressed 3 times consecutively within 3 seconds while driving. For the next 30 seconds, restarting is possible regardless of the presence of FOB key inside the vehicle, and pressing the button without stepping on the brake (or with stepping on the brake) with FOB key inside the vehicle will change the electric power through OFF → ACC → IGN → OFF. (However, if gear is not in P, ACC ↔ AGN will be repeated. The conversion to OFF is impossible.)
    Fig 3: Button Starting Function Chart - Ignition Forcibly And Restart While Driving
    G12143088Courtesy of KIA MOTORS AMERICA, INC.
  4. 0.5 seconds delay function of brake switch input

    Engine can be started if the brake pedal is depressed within 0.5 seconds after pressing the start button in engine "OFF" state.

  5. State of start button indicator (LED) ON depending on the electric power state.
    • Electric power OFF: LED OFF
    • Electric power ACC state: Amber LED ON
    • Electric power ON: Blue LED ON
    • While cranking: Maintain the previous LED ON state before cranking
    • Starting ON state: LED OFF