P0126

DTC P0126 INSUFFICIENT ENGINE COOLANT TEMPERATURE FOR STABLE OPERATION

1. OUTLINE OF DIAGNOSIS
Detect the malfunction of engine coolant temperature sensor property.
The engine coolant temperature and fuel temperature are memorized when stopping the engine at the previous time. Judge NG when the engine coolant temperature does not decrease in the case the engine coolant temperature seems to decrease after starting the engine this time.




2. COMPONENT DESCRIPTION




3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE
Perform the diagnosis once after starting the engine.

5. DIAGNOSTIC METHOD




- Abnormality Judgment
Judge NG when the cumulative time of completing the malfunction criteria below becomes more than 2.5 seconds.




- Normality Judgment
Judge OK when the malfunction criteria below are completed.

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

7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK idling cycle was completed 40 times in a row
- When "Clear Memory" was performed

8. FAIL SAFE
None

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