P1446

DTC P1446 FUEL TANK SENSOR CONTROL VALVE CIRCUIT LOW

1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of fuel tank sensor control valve.
Judge NG when the ECM output level is different from actual terminal level.




2. COMPONENT DESCRIPTION




3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously

5. DIAGNOSTIC METHOD




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




- Normality Judgment
Judge OK when the malfunction criteria 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 driving cycle is completed 3 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)