P0506

DTC P0506 - IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED

OUTLINE OF DIAGNOSIS
Detect the malfunction that the engine speed does not approach to the target engine speed at idling.
Judge NG when the engine speed is lower than target engine speed and does not increase to target engine speed even though idle air control solenoid valve is opened.




COMPONENT DESCRIPTION




ENABLE CONDITION

GENERAL DRIVE CYCLE
Perform the diagnosis continuously at idling after warming up engine.

DIAGNOSTIC METHOD




- Abnormality Judgment
Judge NG when the continuous time until completing all the malfunction criteria becomes more than the time (10 seconds) needed for diagnosis.




- Normality Judgment
Judge OK when the continuous time until completing the malfunction criteria becomes more than time needed for diagnosis (2 seconds).

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
None

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