P0506

DTC P0506 - IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED

1. OUTLINE OF DIAGNOSIS
Detect the malfunction that actual engine speed is not close to target engine speed during idling.
Judge NG when actual engine speed is not close to target engine speed during idling.




2. ENABLE CONDITION

3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously during idling, 10 seconds after starting and warming up.

4. DIAGNOSTIC METHOD




- Abnormality Judgment
Judge NG when the cumulative time of completing the malfunction criterion becomes more than the time needed for diagnosis (10 seconds * 3 times).




- Normality Judgment
Judge OK and clear NG when the continuous time of completing the malfunction criterion becomes more than the time needed for diagnosis (10 seconds).

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

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

7. FAIL SAFE
Judgment of heavy fuel: Not allowed to make the judgment of heavy fuel.
Knock compensation:
- Knock compensation final retard/advance value: Knock compensation value + Total learning compensation value + Partial learning compensation value
- AT normal: Knock compensation value equal to Fixed on 0 degree CA
- AT abnormal: Knock compensation value not equal to Fixed on 0 degree CA (Maximum 12 degree CA retard on knocking)
- Not allowed to refresh learning compensation coefficient
- Not allowed to calculate partial learning zone compensation value

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