Subaru IMPREZA 2002 Service Manual page 529

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
~~ ~
Step
1
CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK FUEL FILLER CAP.
1)Turn the ignition switch to
OFF.
2)Open the fuel flap.
3
CHECK PRESSURENACUUM LINE.
NOTE:
Check the following items.
*Disconnection, leakage and clogging of the
vacuum hoses and pipes between fuel tank
pressure sensor and fuel tank
*Disconnection, leakage and clogging of air
ventilation hoses and pipes between fuel filler
pipe and fuel tank
Check
s there any DTC on display?
s the fuel filler cap tightened
,ecu rely?
s
there a fault in pressurehac-
ium line?
Yes
Inspect the rele-
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
List of Diagnostic
Trouble Code
(DTC) .>
Go to step 3.
EN(S0HC)-77,
Repair or replace
the hoses and
pipes.
No
Go to step 2.
Tighten fuel filler
cap securely.
Replace the fuel
tank pressure sen
sor. <Ref. to
Fuel Tank Pres-
sure Sensor.>
EC(S0HC)-IO,
EN(S0HC)-205