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Home >> Kia >> 2009 >> Optima EX, 2.7 4 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - 2.7L >> Electronic Throttle Control (Etc) System >> Troubleshooting >> Fail Safe Mode
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Fail Safe Mode

FAIL SAFE CHART

Mode Symptom Possible Cause
[MODE 1] FORCED ENGINE SHUTDOWN
  • Engine stop
  • ETC system can't proceed reliable algorithm procedure
    • Fatal ECM internal programming error
    • Faulty intake system or throttle body
[MODE 2] FORCED IDLE & POWER MANAGEMENT
  • Forced idle state controlled by fuel quantity regulation and ignition timing adjustment
  • ETC system can't control engine power via throttle device
  • Disabled throttle control or broken throttle position information
[MODE 3] FORCED IDLE
  • No response for accelerator activation
  • Forced idle state
  • No information about the accelerator position
    • Broken APS 1 and 2, faulty A/D converter or internal controller
[MODE 4] LIMIT PERFORMANCE & POWER MANAGEMENT
  • Engine power is determined by accelerator position and idle power requirement (Limited vehicle running)
  • ETC system can't securely control engine power
[MODE 5] LIMIT PERFORMANCE
  • Engine power varies with accelerator position
  • Driver perceives lack of engine power.
  • MIL ON (Normal vehicle running)
  • Not reliable accelerator position signal or bad maximum power generation
    • Faulty APS, ignition voltage or internal controller
[MODE 6] NORMAL
  • Normal