Subaru Legacy III (2000-2003 year). Manual - part 458
EN(H4DOSTC)-2
ENGINE (DIAGNOSTICS)
BASIC DIAGNOSTIC PROCEDURE
1. Basic Diagnostic Procedure
A: PROCEDURE
1. ENGINE
Step
Value
Yes
No
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?
Engine starts.
Inspection using
“Diagnostics for
Engine Start Fail-
ure”. <Ref. to
EN(H4DOSTC)-
66, Diagnostic
Procedure with
Diagnostic Trou-
ble Code (DTC).>
2
CHECK ILLUMINATION OF CHECK ENGINE
MALFUNCTION INDICATOR LAMP (MI).
Does the CHECK ENGINE malfunction indica-
tor lamp illuminate?
Indicator lamp illuminates.
Inspection using
“General Diagnos-
tics Table”. <Ref.
to EN(H4DOSTC)-
246, General
Diagnostic Table.>
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?
DTC is indicated.
Record the DTC.
Repair the trouble
cause. <Ref. to
EN(H4DOSTC)-
62, List of Diag-
nostic Trouble
Code (DTC).> Go
to step 4.
Repair the related
parts.
NOTE:
If DTC is not
shown on display
although the MI il-
luminates, per-
form diagnostics of
MI (CHECK EN-
GINE malfunction
indicator lamp) cir-
cuit or combination
meter. <Ref. to
EN(H4DOSTC)-
38, Engine Mal-
function Indicator
Lamp (MI).>
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?
DTC is indicated.
Inspect using
“Diagnostics Pro-
cedure with Diag-
nostic Trouble
Code (DTC)”.
<Ref. to
EN(H4DOSTC)-
66, Diagnostic
Procedure with
Diagnostic Trou-
ble Code (DTC).>
Complete the
diagnosis.