Subaru 2009 IMPREZA Service Manual page 1769

Diagnostic Trouble Code (DTC) Detecting Criteria
CT:DTC P1443 VENT CONTROL SOLENOID VALVE FUNCTION PROBLEM
1. OUTLINE OF DIAGNOSIS
Detect the abnormal function (stuck closed) of the drain valve.
Judge as NG when fuel tank pressure is low.
2. COMPONENT DESCRIPTION
(19)
(1) Bobbin
(2) Coil
(3) Diode
(4) Stator core
(5) End plate
(6) Body
(7) Yoke
3. ENABLE CONDITIONS
Secondary Parameters
Drain valve
Battery voltage
Barometric pressure
Tank pressure when starter is OFF
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(14) (15) (16)
(9) (10) (11) (12)
(8) Magnetic plate
(9) Shaft
(10) Plate
(11) Valve
(12) Housing
(13) Filter
Enable Condition
Open
10.9 V
75 kPa (563 mmHg,
22.2 inHg)
ON –0.7 kPa
(–5 mmHg, –0.2 inHg)
and
1.4 kPa (10.7 mmHg,
0.4 inHg)
GD(H4DOTC)-181
(8) (7) (4) (5)
(13) (17) (2) (1)
GENERAL DESCRIPTION
(19) (18)
(6)
(3)
(14) Retainer
(15) Diaphragm
(16) Movable core
(17) Spring
(18) Cover
(19) O-ring
EN-02294