Subaru IMPREZA GD 2007 Series Manual page 2211

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Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BK:DTC P0447 EVAPORATIVE EMISSION CONTROL SYSTEM VENT CONTROL
CIRCUIT OPEN
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of the drain valve.
Judge as NG when the ECM output level differs from the actual terminal level.
2. COMPONENT DESCRIPTION
(1) Magnetic plate
(2) Yoke
(3) gasket
(4) Spring
3. ENABLE CONDITION
Secondary Parameters
None
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(1)
(2)
(3)
(10)
(9)
(5) Valve seat
(6) Valve
(7) Plate
Enable Conditions
GD(STI)-144
(4)
(5)
(6)
(7)
(8)
(8) Retainer
(9) Movable core
(10) Bobbin
EN-01730