Subaru 2009 IMPREZA Service Manual page 888

Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CM:DTC P1420 FUEL TANK PRESSURE CONTROL SOL. VALVE CIRCUIT HIGH
1. OUTLINE OF DIAGNOSIS
Detect the open/short circuit of pressure control solenoid valve.
Judge as NG when ECM output level is different from actual terminal level.
2. COMPONENT DESCRIPTION
(B)
(A) Barometric pressure
(1) Filter
(2) Coil
3. ENABLE CONDITIONS
Secondary Parameters
None
4. GENERAL DRIVING CYCLE
Always perform the diagnosis after starting the engine.
(A)
(4)
(B) Shut-off valve
(3) Connector terminal
(4) Diaphragm
Enable Condition
GD(H4SO)-164
(1)
(2)
(3)
(5)
(C) To fuel tank
(5) Valve
(C)
EN-01759