Subaru 2009 IMPREZA, Service Manual

Page: 1456 / 3619

EN(H4DOTC)(diag)-235
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step Check Yes No
1 CHECK FUEL FILLER CAP.
1) Turn the ignition switch to OFF.
2) Check the fuel filler cap.
NOTE:
The DTC is stored in memory if fuel filler cap is
or was loose or if the cap chain has caught while
tightening.
Is the fuel filler cap tightened
securely? Go to step 2 . Tighten fuel filler
cap securely.
2 CHECK FUEL FILLER CAP. Is the fuel filler cap genuine? Go to step 3 . Replace with a
genuine fuel filler
cap.
3 CHECK FUEL FILLER PIPE GASKET. Is there any damage to the seal
between fuel filler cap and fuel
filler pipe? Repair or replace
the fuel filler cap
and fuel filler pipe.
<Ref. to
FU(H4DOTC)-69,
Fuel Filler Pipe.> Go to step 4 .
4 CHECK DRAIN VALVE.
1) Connect the delivery (test) mode connector.
2) Turn the ignition switch to ON.
3) Operate the drain valve using the Subaru
Select Monitor.
NOTE:
Drain valve can be operated using the Subaru
Select Monitor. For the procedures, refer to
“Compulsory Valve Operation Check Mode”.
<Ref. to EN(H4DOTC)(diag)-55, Compulsory
Valve Operation Check Mode.>
Does the drain valve operate? Go to step 5 . Replace the drain
valve. <Ref. to
EC(H4DOTC)-22,
Drain Valve.>
5 CHECK PURGE CONTROL SOLENOID
VALVE.
Operate the purge control solenoid valve using
the Subaru Select Monitor.
NOTE:
Purge control solenoid valve operation can be
executed using Subaru Select Monitor. For the
procedures, refer to “Compulsory Valve Opera-
tion Check Mode”. <Ref. to EN(H4DOTC)(di-
ag)-55, Compulsory Valve Operation Check
Mode.>
Does the purge control sole-
noid valve operate? Go to step 6 . Replace the purge
control solenoid
valve. <Ref. to
EC(H4DOTC)-11,
Purge Control
Solenoid Valve.>
6 CHECK PRESSURE CONTROL SOLENOID
VALVE.
Operate the pressure control solenoid valve
using the Subaru Select Monitor.
NOTE:
The pressure control solenoid valve operation
can be executed using the Subaru Select Mon-
itor. For the procedures, refer to “Compulsory
Valve Operation Check Mode”. <Ref. to
EN(H4DOTC)(diag)-55, Compulsory Valve Op-
eration Check Mode.>
Does the pressure control sole-
noid valve operate? Go to step 7 . Replace the pres-
sure control sole-
noid valve. <Ref. to
EC(H4DOTC)-19,
Pressure Control
Solenoid Valve.>
7 CHECK EVAPORATIVE EMISSION CON-
TROL SYSTEM LINE.
1) Turn the ignition switch to OFF.
2) Disconnect the delivery (test) mode connec-
tor.
Is there any disconnection,
damage or clogging on the
evaporation line? Repair or replace
the evaporation
line. <Ref. to
FU(H4DOTC)-84,
Fuel Delivery,
Return and Evapo-
ration Lines.> Go to step 8 .