Subaru IMPREZA 2002 Service Manual page 513

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step
CHECK ANY OTHER DTC ON DISPLAY.
CHECK FUEL FILLER CAP.
1)Turn the ignition switch to OFF.
2)Check the fuel filler cap.
NOTE:
The DTC code is stored in memory if fuel filler
cap is or was loose or if the cap chain was
caught while tightening.
CHECK FUEL FILLER PIPE PACKING.
CHECK DRAIN VALVE.
1)Connect the test mode connector.
2)Turn the ignition switch to ON.
3)Operate the drain valve.
NOTE:
Drain valve operation can also be executed us-
ing Subaru Select Monitor. For the procedure,
refer to "Compulsory Valve Operation Check
Mode". <Ref. to EN(S0HC)-44, Compulsory
Valve Operation Check Mode.>
CHECK PURGE CONTROL SOLENOID
VALVE.
Operate the purge control solenoid valve.
NOTE:
Purge control solenoid valve operation can also
be executed using Subaru Select Monitor. For
the procedure, refer to "Compulsory Valve Op-
eration Check Mode". <Ref. to EN(S0HC)-44,
Compulsory Valve Operation Check Mode.>
CHECK PRESSURE CONTROL SOLENOID
VALVE.
Operate the pressure control solenoid valve.
NOTE:
Pressure control solenoid valve operation can
also be executed using Subaru Select Monitor.
For the procedure, refer to "Compulsory Valve
Operation Check Mode". <Ref. to EN(S0HC)-
44, Compulsory Valve Operation Check
Mode.>
TROL SYSTEM LINE.
Turn the ignition switch to OFF.
. CHECK EVAPORATIVE EMISSION CON-
Check
s there any other DTC on dis-
day?
s
the fuel filler cap tightened
securely?
Is there any damage to the
seal between fuel filler cap and
bel filler pipe?
Does the drain valve produce
Dperating sound?
Does the purge control sole-
noid valve produce operating
sound?
Does the pressure control
solenoid valve produce operat-
ing sound?
IS there a hole of more than 1 .O
mm (0.04 in) dia. on fuel line?
Yes
nspect the rele-
rant DTC using
List of Diagnostic
rrouble Code
DTC)". <Ref. to
i s t of Diagnostic
rrouble Code
DTC) .
>
30 to step 3 .
iN(SOHC)-77,
3epair or replace
he fuel filler cap
md fuel filler pipe.
:Ref. to
%el Filler Pipe.>
30 to step
5.
W(SOHC)-54,
30 to step 6.
30 to step 7.
3epair or replace
he fuel line. <Ref.
%el Delivery,
3eturn and Evapo
ation Lines.>
o FU(S0HC)-68,
No
Go to step 2.
Tighten fuel filler
cap securely.
Go to step 4.
Replace the drain
valve. <Ref. to
Drain Valve.>
EC(S0HC)-16,
Replace the purge
control solenoid
valve. <Ref. to
Purge Control
Solenoid Valve.>
EC(SOHC)B,
Replace the pres-
sure control sole-
noid valve. <Ref.
Pressure Control
Solenoid Valve.>
to EC(S0HC)-11,
Go to step 8.
EN(S0HC)-189