Subaru Legacy 2003 Service Manual page 2056

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
7 CHECK VACUUM HOSES OF DIFFEREN-
TIAL PRESSURE SENSOR.
Are there cracks, stuck or improper routing on
vacuum hose?
8 CHECK VACUUM HOSES OF PRIMARY
TURBOCHARGER WASTEGATE CONTROL
VALVE.
Are there cracks, stuck or improper routing on
vacuum hose?
9 CHECK VACUUM HOSES BETWEEN SOLE-
NOID BOX AND SURGE TANK.
Are there cracks, stuck or improper routing on
vacuum hose?
10 CHECK PRIMARY TURBOCHARGER
WASTEGATE VALVE.
Is there a fault on the primary turbocharger
wastegate valve?
11 CHECK LH AND RH INTAKE DUCT.
Are there cracks or stuck on the LH and RH
intake duct?
Value
There is no problem.
There is no problem.
There is no problem.
There is no problem.
There is no problem.
EN(H4DOSTC)-217
ENGINE (DIAGNOSTICS)
Yes
Go to step 8. Repair or replace
the vacuum hoses.
Go to step 9. Repair or replace
the vacuum hoses.
Go to step 10. Repair or replace
the vacuum hoses.
Go to step 11. Replace the pri-
mary turbo-
charger. <Ref. to
IN(H4DOSTC)-15,
Turbocharger.>
Replace the ECM. Replace the air
<Ref. to intake duct. <Ref.
FU(H4DOSTC)- to IN(H4DOSTC)-
40, Engine Con- 12, Intake Duct.>
trol Module.>
No