P0483

DTC P0483 COOLING FAN RATIONALITY CHECK

1. OUTLINE OF DIAGNOSIS
Detect the function abnormality of the radiator fan.
Judge NG when the engine coolant temperature slowly decreases even when the radiator fan is rotating




2. ENABLE CONDITION
Diagnostic enable condition is completed if the radiator fan changes from OFF to ON when all of the conditions are completed. When one of the conditions is not completed, the diagnostic enable condition is not completed.

3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously when the radiator fan changes from OFF to ON when idling.

4. DIAGNOSTIC METHOD




- Abnormality Judgment
Judge NG when the continuous time of completing the malfunction criteria becomes more than 5 minutes.




- Normality Judgment
Judge OK and clear NG when the malfunction criteria are completed.

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
None

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