DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Check Step
6 CHECK MISFIRE SYMPTOM.
1)Turn the ignition switch
to
ON.
2)Read the diagnostic trouble code (DTC).
*Subaru Select Monitor
<Ref.
to
EN(D0HC TURBO)-38, Subaru
Select Monitor.>
*OBD-II general scan tool
For detailed operation procedures, refer
to
the
OBD-ll General Scan Tool Operation Manual.
NOTE:
Perform diagnosis according to the items listec
below.
(DTC) ON DISPLAY.
7
CHECK DIAGNOSTIC TROUBLE CODE
Yes
8 CHECK DIAGNOSTIC TROUBLE CODE
(DTC) ON DISPLAY.
Does the Subaru Select Moni-
tor
or OBD-ll general scan tool
indicate DTC PO301 and
P0302?
Does the Subaru Select Moni-
tor or OBD-II general scan
tool
indicate DTC PO303 and
P0304?
Does the Subaru Select Moni-
tor or OBD-ll general scan
tool
indicate DTC PO301 and
P0303?
Does the Subaru Select Moni-
tor or OBD-I1 general scan tool
indicate DTC PO302 and
P0304?
Is
there a fault in that cylinder?
9 CHECK DIAGNOSTIC TROUBLE CODE
(DTC) ON DISPLAY.
Go
to step
22.
Go
to
step
23.
Go to step
24.
Go
to step
25.
Repair or replace
faulty parts.
NOTE:
Check the follow-
ing items.
Spark plug
Spark plug cord
Fuel injector
Compression
ratio
0
CHECK DIAGNOSTIC TROUBLE CODE
(DTC) ON DISPLAY.
1
ONLY ONE CYLINDER
tor or OBD-ll general scan tool
indicate only one DTC?
No
30
to step
17.
30
to step
18.
30
to step
19.
20
to
step
20.
30
to step
26.
30
to DTC PO171
md P0172. <Ref.
o
EN(D0HC
rURBO)-152,
ITC PO171
-
'UEL TRIM MAL-
UNCTION
(NF
Iiagnostic Proce-
lure with Diagnos
ic Trouble Code
DTC).>
'00
LEAN)
-,
EN(D0HC TURBO)-178
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