Subaru 2002 Impreza - Page 425

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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(D0HC TURBO)-50, Com-
pulsory Valve Operation Check Mode.>
CHECK PURGE CONTROL SOLENOID
VALVE.
Operate the purge control solenoid valve.
NOTE:
Purge control solenoid valve operation can alsc
be executed using Subaru Select Monitor. Foi
the procedure, refer to “Compulsory Valve Op.
eration Check Mode”. <Ref. to EN(D0HC TUR-
BO)-50, Compulsory Valve Operation Check
Mode.>
CHECK PRESSURE CONTROL SOLENOID
VALVE.
Operate the pressure control solenoid valve.
NOTE:
Pressure control solenoid valve operation car
also be executed using Subaru Select Monitor
For the procedure, refer to “Compulsory Valve
Operation Check Mode”. <Ref. to EN(D0HC
TURBO)-50, Compulsory Valve Operatior
Check Mode.>
TROL SYSTEM LINE.
Turn the ignition switch to OFF.
CHECK EVAPORATIVE EMISSION CON-
Check
IS there any other DTC on dis-
,lay?
Is the fuel filler cap tightened
securely?
Is there any damage to the
seal between fuel filler cap and
fuel filler pipe?
Does the drain valve produce
operating 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-
/ant DTC using
‘List of Diagnostic
rrouble Code
DTC)”. <Ref. to
IN(D0HC
rURBO)-80, List
if Diagnostic Trou.
ile Code (DTC).>
30 to step 3.
3epair or replace
he fuel filler cap
md fuel filler pipe.
:Ref.
to FU(D0HC
TURBO)-55, Fuel
-iller Pipe.>
30 to step 5.
-.
So to step 6.
Go to step 7.
Repair or replace
the fuel line. <Ref.
to FU(D0HC
TURBO)-68, Fuel
Delivery, Return
and Evaporation
Lines.>
No
30 to step 2.
Tighten fuel filler
cap securely.
Go to step 4.
Replace the drain
valve. <Ref. to
EC(D0HC
TURBO)-17, Drair
Valve.>
Replace the purge
control solenoid
valve. <Ref. to
EC(D0HC
TURBO)-7, Purge
Control Solenoid
Valve.>
Replace the pres-
sure control sole-
noid valve. <Ref.
to EC(D0HC
TURBO)-I 2, Pres
sure Control Sole-
noid Valve.>
Go to step 8.
EN (DOH C TU R BO)-201