Subaru LEGACY 2003 Service Manual page 5

2. WITHOUT SUBARU SELECT MONITOR
CAUTION:
• Check the connector while it is connected un-
less specified otherwise.
1 CHECK ENGINE START FAILURE.
1) Ask the customer when and how the trou-
ble occurred using the interview check list.
<Ref. to EN(H4SOw/oOBD)-4, CHECK,
Check List for Interview.>
2) Start the engine.
Does the engine start?
2 CHECK ILLUMINATION OF CHECK ENGINE
MALFUNCTION INDICATOR LAMP (MIL).
<Ref. to EN(H4SOw/oOBD)-30, ACTIVATION
OF CHECK ENGINE MALFUNCTION INDICA-
TOR LAMP (MIL), Engine Malfunction Indica-
tor Lamp (MIL).>
Does MIL illuminate?
3 CHECK INDICATION OF DTC ON MIL.
1) Perform the read diagnostic trouble code
(read memory mode).<Ref. to EN(H4SOw/
oOBD)-24, WITHOUT SUBARU SELECT
MONITOR, OPERATION, Read Diagnos-
tic Trouble Code (DTC).>
2) Read DTC on MIL.
Does the MIL indicate DTC? <Ref. to
EN(H4SOw/oOBD)-57, LIST, List of Diag-
nostic Trouble Code (DTC).>
4 PERFORM THE DIAGNOSIS.
1) Perform the clear memory mode. <Ref. to
EN(H4SOw/oOBD)-28, OPERATION,
Clear Memory Mode.>
2) Perform the inspection mode. <Ref. to
EN(H4SOw/oOBD)-26, OPERATION,
Inspection Mode.>
Does the MIL indicate DTC? <Ref. to
EN(H4SOw/oOBD)-67, DTC 21 ENGINE
COOLANT TEMPERATURE SENSOR,
Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
BASIC DIAGNOSTIC PROCEDURE
Step
EN(H4SOw/oOBD)-3
• Be sure to check again from the beginning in
order to prevent secondary trouble caused by
repair work.
Value
Engine starts.
MIL illuminates.
DTC is displayed on MIL.
DTC is displayed on MIL.
ENGINE (DIAGNOSTICS)
Yes
Go to step 2. Inspection using
"Diagnostics for
Engine Starting
Failure". <Ref. to
EN(H4SOw/
oOBD)-39, Diag-
nostics for Engine
Starting Failure.>
Go to step 3. Inspection using
"9. General Diag-
nostic Table".
<Ref. to
EN(H4SOw/
oOBD)-102,
INSPECTION,
General Diagnos-
tic Table.>
Repair the trouble Repair the related
cause. Go to step parts.
4.
NOTE:
If DTC
shown on MIL al-
though the MIL illu-
minates,
diagnostics of MIL
(CHECK ENGINE
malfunction indica-
tor lamp) circuit or
combination
meter.<Ref.
EN(H4SOw/
oOBD)-30, Engine
Malfunction Indica-
tor Lamp (MIL).>
Repair the trouble Complete the
cause. Go to step diagnosis.
4.
No
is not
perform
to