Fail-Safe Mode

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 (Normalvehicle running)

●

Not reliable accelerator position signal or bad maximum power generation

-

Faulty APS, ignition voltage or internal controller

[Mode 6] Normal

●

Normal

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