Subaru IMPREZA GD 2007 Series Manual page 366

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
2 CHECK DRAIN HOSE.
Check the drain hose for clogging.
3 CHECK DRAIN VALVE OPERATION.
1) Turn the ignition switch to OFF.
2) Connect the test mode connector at the
lower portion of instrument panel (on the
driver's side).
3) Turn the ignition switch to ON.
4) Operate the drain valve.
NOTE:
Drain valve operation can be executed using
the Subaru Select Monitor. Regarding the pro-
cedures, refer to "Compulsory Valve Operation
Check Mode". <Ref. to EN(H4SO)(diag)-48,
Compulsory Valve Operation Check Mode.>
Check
Is there clogging in the drain
hose?
Does the drain valve operate? Repair poor con-
EN(H4SO)(diag)-257
ENGINE (DIAGNOSTICS)
Yes No
Check the appro- Go to step 2.
priate DTC using
the "List of Diag-
nostic Trouble
Code (DTC)".
<Ref. to
EN(H4SO)(diag)-
72, List of Diagnos-
tic Trouble Code
(DTC).>
Replace the drain Go to step 3.
hose.
Replace the drain
tact of the ECM valve. <Ref. to
connector. EC(H4SO)-16,
Drain Valve.>