EN(H4SO)(diag)-2
ENGINE (DIAGNOSTICS)
Basic Diagnostic Procedure
1. Basic Diagnostic Procedure
A: PROCEDURE
1. ENGINE
Step Check Yes No
1 CHECK ENGINE START FAILURE.
1)Ask the customer when and how the trouble
occurred using the check list for interview.
<Ref. to EN(H4SO)(diag)-4, CHECK, Check
List for Interview.>
2)Start the engine.
Does the engine start? Go to step 2. Inspection using
“Diagnostics for
Engine Start Fail-
ure”. <Ref. to
EN(H4SO)(diag)-
59, Diagnostics for
Engine Starting
Failure.>
2 CHECK ILLUMINATION OF MALFUNCTION
INDICATOR LIGHT.
Does malfunction indicator
light illuminate?
Go to step 3. Inspection using
“General Diagnos-
tics Table”. <Ref.
to
EN(H4SO)(diag)-
260, INSPEC-
TION, 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 connec-
tor.
3)Turn the ignition switch to ON and the Sub-
aru Select Monitor or OBD-II general scan tool
switch to ON.
4)Read the DTC on the Subaru Select Monitor
or OBD-II general scan tool.
Does the Subaru Select Moni-
tor or OBD-II general scan tool
indicate DTC?
Record the DTC.
Repair the trouble
cause. <Ref. to
EN(H4SO)(diag)-
74, List of Diag-
nostic Trouble
Code (DTC).> Go
to step 4.
Repair the related
parts.
N
TE:
If DTC is not
shown on display
although the mal-
function indicator
light illuminates,
perform diagnos-
tics of malfunction
indicator light cir-
cuit or combination
meter. <Ref. to
EN(H4SO)(diag)-
50, Malfunction In-
dicator Light.>
4 PERFORM THE DIAGNOSIS.
1)Perform the clear memory mode. <Ref. to
EN(H4SO)(diag)-47, Clear Memory Mode.>
2)Perform the inspection mode. <Ref. to
EN(H4SO)(diag)-40, Inspection Mode.>
Does the Subaru Select Moni-
tor or OBD-II general scan tool
indicate DTC?
Inspect using
“Diagnostics Pro-
cedure with Diag-
nostic Trouble
Code (DTC)”.
<Ref. to
EN(H4SO)(diag)-
80, Diagnostic
Procedure with
Diagnostic Trou-
ble Code (DTC).>
Complete the
diagnosis.
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