P1420

DTC P1420 - FUEL TANK PRESSURE CONTROL SOL. VALVE CIRCUIT HIGH

OUTLINE OF DIAGNOSIS
Detect open or short circuit of pressure control solenoid valve.
Judge NG when ECM output level is different from actual terminal level.




COMPONENT DESCRIPTION




ENABLE CONDITION

GENERAL DRIVING CYCLE
Always perform the diagnosis after starting the engine.

DIAGNOSTIC METHOD




Judge NG when the continuous time of completing the malfunction criteria becomes more than time needed for diagnosis (2.5 seconds). Judge OK and clear the NG when the malfunction criteria are not completed.

DTC CLEAR CONDITION
- When the OK idling cycle was 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 OPERATING AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)