Subaru Legacy 2004 Service Manual page 1291

ENGINE (DIAGNOSTICS)
1. Basic Diagnostic Procedure
A: PROCEDURE
1. ENGINE
Step
1 CHECK ENGINE START FAILURE.
1) Ask the customer when and how the trou-
ble occurred using the interview check list.
<Ref. to EN(H4DOTC)(diag)-3, CHECK, Check
List for Interview.>
2) Start the engine.
2 CHECK ILLUMINATION OF MALFUNCTION
INDICATOR LIGHT.
3 CHECK INDICATION OF DTC ON SCREEN.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data
link connector.
3) Turn the ignition switch to ON, and the Sub-
aru Select Monitor switch to ON.
4) Read DTC on Subaru Select Monitor.
4 PERFORM THE DIAGNOSIS.
1) Perform clear memory mode. <Ref. to
EN(H4DOTC)(diag)-30, Clear Memory Mode.>
2) Perform the inspection mode. <Ref. to
EN(H4DOTC)(diag)-28, Inspection Mode.>
Basic Diagnostic Procedure
Does the engine start?
Does malfunction indicator
light illuminate?
Is DTC displayed on the Sub-
aru Select Monitor?
Is DTC displayed on the Sub-
aru Select Monitor?
EN(H4DOTC)(diag)-2
Check Yes
Go to step 2.
Go to step 3.
Record the DTC.
Repair the trouble
cause. <Ref. to
EN(H4DOTC)(diag
)-55, List of Diag-
nostic Trouble
Code (DTC).> Go
to step 4.
Check on "Diag-
nostic Chart with
Diagnostic Trou-
ble Code (DTC)"
<Ref. to
EN(H4DOTC)(diag
)-60, Diagnostic
Procedure with
Diagnostic Trou-
ble Code (DTC).>
No
Inspection using
"Diagnostics for
Engine Starting
Failure". <Ref. to
EN(H4DOTC)(diag
)-42, Diagnostics
for Engine Start-
ing Failure.>
Inspection using
"General Diagnos-
tic Table". <Ref. to
EN(H4DOTC)(diag
)-202, General
Diagnostic Table.>
Repair the related
parts.
NOTE:
If DTC is not
shown on display
although the mal-
function indicator
light illuminates,
perform the diag-
nostics for mal-
function indicator
light circuit or com-
bination meter.
<Ref. to
EN(H4DOTC)(di-
ag)-33, Malfunc-
tion Indicator
Light.>
Finish the diagno-
sis.