P0519

DTC P0519 - IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE)

OUTLINE OF DIAGNOSIS
- Detect the malfunction of engine speed increase at idling.
- Judge NG when the engine speed is higher than and too far from the target engine speed.




ENABLE CONDITION

GENERAL DRIVE CYCLE
Always perform the diagnosis continuously at idle speed.

DIAGNOSTIC METHOD




- Abnormality Judgment
Judge NG when the cumulative time until completing the malfunction criteria becomes more than the time needed for diagnosis.




- Normality Judgment
Judge OK when one of the malfunction criteria is completed.

DTC CLEAR CONDITION
- When the OK idling cycle is completed 40 times in a row
- When "Clear Memory" was performed

MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle was completed 3 times in a row
- When "Clear Memory" was performed

FAIL SAFE
Cut the fuel of all cylinders, #1 cylinder or #1, #2 cylinder according to throttle position, engine speed, vehicle speed.

ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)