Subaru Legacy 2003 Service Manual page 1841

ENGINE (DIAGNOSTICS)
1. Basic Diagnostic Procedure
A: PROCEDURE
1. ENGINE
1 CHECK ENGINE START FAILURE.
1) Ask the customer when and how the trou-
ble occurred using the interview check list.
<Ref. to EN(H4DOSTC)-4, CHECK, Check
List for Interview.>
2) Start the engine.
Does the engine start?
2 CHECK ILLUMINATION OF CHECK ENGINE
MALFUNCTION INDICATOR LAMP (MI).
Does the CHECK ENGINE malfunction indica-
tor lamp illuminate?
3 CHECK INDICATION OF DTC ON DISPLAY.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor or the
OBD-II general scan tool to data link con-
nector.
3) Turn the ignition switch to ON and the
Subaru Select Monitor or OBD-II general
scan tool switch to ON.
4) Read the DTC on the Subaru Select Moni-
tor.
Does the Subaru Select Monitor indicate
DTC?
4 PERFORM THE DIAGNOSIS.
1) Perform the clear memory mode. <Ref. to
EN(H4DOSTC)-35, Clear Memory Mode.>
2) Perform the inspection mode. <Ref. to
EN(H4DOSTC)-33, Inspection Mode.>
Does the Subaru Select Monitor indicate
DTC?
BASIC DIAGNOSTIC PROCEDURE
Step
EN(H4DOSTC)-2
Value
Engine starts.
Indicator lamp illuminates.
DTC is indicated.
DTC is indicated.
Yes
Go to step 2. Inspection using
"Diagnostics for
Engine Start Fail-
ure". <Ref. to
EN(H4DOSTC)-
66, Diagnostic
Procedure with
Diagnostic Trou-
ble Code (DTC).>
Go to step 3. Inspection using
"General Diagnos-
tics Table". <Ref.
to EN(H4DOSTC)-
246, General
Diagnostic Table.>
Record the DTC. Repair the related
Repair the trouble parts.
cause. <Ref. to
NOTE:
EN(H4DOSTC)-
If DTC
62, List of Diag-
shown on display
nostic Trouble
although the MI il-
Code (DTC).> Go
luminates,
to step 4.
form diagnostics of
MI (CHECK EN-
GINE malfunction
indicator lamp) cir-
cuit or combination
meter.
EN(H4DOSTC)-
38, Engine Mal-
function Indicator
Lamp (MI).>
Inspect using Complete the
"Diagnostics Pro- diagnosis.
cedure with Diag-
nostic Trouble
Code (DTC)".
<Ref. to
EN(H4DOSTC)-
66, Diagnostic
Procedure with
Diagnostic Trou-
ble Code (DTC).>
No
is not
per-
<Ref. to