Subaru FORESTER 2001 Service Manual page 322

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK EXHAUST SYSTEM.
Check exhaust system parts.
NOTE:
Check the following items.
¼ Loose installation of exhaust manifold
¼ Cracks or hole of exhaust manifold
¼ Loose installation of front oxygen (A/F) sen-
sor
Step
Does the Subaru Select
Monitor or OBD-II general
scan tool indicate DTC
P0335, P0336, P0340,
P0341, P0545, P0546,
P1312, P0102, P0103,
P0101, P1141, P0301,
P0302, P0303, P0304,
P1301, P0171, P0133,
P1134, P0131, P0132,
P1130, P1131, P1139,
P0031, P0032, P0139,
P0136, P0039 or P0037?
Is there a fault in exhaust
system?
EN(DOHC TURBO)-321
Check Yes
Inspect DTC
P0335, P0336,
P0340, P0341,
P0545, P0546,
P1312, P0102,
P0103, P0101,
P1141, P0301,
P0302, P0303,
P0304, P1301,
P0171, P0133,
P1134, P0131,
P0132, P1130,
P1131, P1139,
P0031, P0032,
P0139, P0136,
P0039 or P0037
using List of Diag-
nostic Trouble
Code (DTC).
<Ref. to
EN(DOHC
TURBO)-82, List
of Diagnostic
Trouble Code
(DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
P1544.
Repair or replace
failure, then
replace precata-
lytic converter.
Engine (Diagnostics)
No
Go to step 2.
Contact your
Subaru distributor.
NOTE:
Inspection by
DTM is required,
because probable
cause is deterio-
ration of multiple
parts.