Subaru IMPREZA GD 2007 Series Manual page 2195

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Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BJ:DTC P0442 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED
(SMALL LEAK)
1. OUTLINE OF DIAGNOSIS
Check if there is a leakage in fuel system or not, and perform the function diagnosis of valve.
(1)
(23)
(22)
(21)
(20)
(1) Purge control solenoid valve 1
(2) Purge control solenoid valve 2
(3) Pressure regulator
(4) Throttle body
(5) Fuel filter
(6) Intake manifold
(7) Engine control module (ECM)
(8) Canister
(9) Pressure control solenoid valve
In this system diagnosis, check for leakage and valve function is conducted by changing the fuel tank pres-
sure and monitoring the pressure change using the fuel tank pressure sensor. When in 0.04 inch diagnosis,
perform in the order of mode A → mode B → mode C → mode D; When in 0.02 inch diagnosis, perform in the
order of mode Y → mode A → mode B → mode C → mode D.
(3)
(2)
(24)
(13)
(19)
(18) (17) (16) (15) (14)
(10) Drain valve
(11) Drain filter
(12) Shut-off valve
(13) Vent valve
(14) Fuel temperature sensor
(15) Fuel level sensor
(16) Fuel pump
(17) Jet pump
(18) Fuel cut valve
GD(STI)-128
: A
: B
(4)
(5)
(6)
(7)
(9)
(12)
(11) (10)
(19) Fuel sub level sensor
(20) Fuel tank
(21) Fuel tank pressure sensor
(22) Fuel gauge
(23) Combination meter
(24) Fuel injector
(A) Fuel line
(B) Evaporative fuel line
(8)
EN-04899