Subaru Legacy 2004 Service Manual page 758

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(H4SO 2.5)(diag)-3, CHECK,
Check List for Interview.>
2) Start the engine.
2 CHECK ILLUMINATION OF MALFUNCTION
INDICATOR LIGHT.
3 CHECK INDICATION OF DTC ON DISPLAY.
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 DIAGNOSIS.
1) Perform the clear memory mode. <Ref. to
EN(H4SO 2.5)(diag)-41, Clear Memory
Mode.>
2) Perform the inspection mode. <Ref. to
EN(H4SO 2.5)(diag)-34, Inspection Mode.>
Basic Diagnostic Procedure
Does the engine start?
Does the malfunction indicator
light illuminate?
Is DTC displayed on the Sub-
aru Select Monitor?
Is DTC displayed on the Sub-
aru Select Monitor?
EN(H4SO 2.5)(diag)-2
Check Yes
Go to step 2.
Go to step 3.
Record the DTC.
Repair the trouble
cause. <Ref. to
EN(H4SO
2.5)(diag)-70, List
of Diagnostic Trou-
ble Code (DTC).>
Go to step 4.
Check on "Diag-
nostic Chart with
Diagnostic Trou-
ble Code (DTC)"
<Ref. to EN(H4SO
2.5)(diag)-80,
Diagnostic Proce-
dure with Diagnos-
tic Trouble Code
(DTC).>
No
Inspection using
"Diagnostics for
Engine Starting
Failure". <Ref. to
EN(H4SO
2.5)(diag)-54,
Diagnostics for
Engine Starting
Failure.>
Inspection using
"General Diagnos-
tic Table". <Ref. to
EN(H4SO
2.5)(diag)-261,
INSPECTION,
General Diagnos-
tic Table.>
Repair the related
parts.
NOTE:
If DTC is not
shown on display
although the en-
gine warning light
illuminates, per-
form the diagnos-
tics of malfunction
indicator light cir-
cuit or combination
meter. <Ref. to
EN(H4SO 2.5)(di-
ag)-44, Malfunc-
tion Indicator
Light.>
Finish the diagno-
sis.