Basic Diagnostic Procedure - Subaru FORESTER 2001 Service Manual

Engine (Diagnostics)

1. Basic Diagnostic Procedure

S088501
A: PROCEDURE
1. ENGINE
S088501E4501
No.
1 CHECK ENGINE START FAILURE.
1) Ask the customer when and how the
trouble occurred using the interview check list.
<Ref. to EN(DOHC TURBO)-4, CHECK,
Check List for Interview.>
2) Start the engine.
2 CHECK ILLUMINATION OF CHECK ENGINE
MALFUNCTION INDICATOR LAMP (MIL).
3 CHECK INDICATION OF DTC ON DISPLAY.
1) Turn ignition switch to OFF.
2) Connect the Subaru Select Monitor or the
OBD-II general scan tool to data link connec-
tor.
3) Turn ignition switch to ON and the Subaru
Select Monitor or OBD-II general scan tool
switch to ON.
4) Read DTC on the Subaru Select Monitor or
OBD-II general scan tool.
4 PERFORM THE DIAGNOSIS.
1) Perform the clear memory mode. <Ref. to
EN(DOHC TURBO)-47, Clear Memory
Mode.>
2) Perform the inspection mode. <Ref. to
EN(DOHC TURBO)-44, Inspection Mode.>
BASIC DIAGNOSTIC PROCEDURE
S088501E45
Step
EN(DOHC TURBO)-2
Check
Does the engine start?
Does CHECK ENGINE
malfunction indicator lamp
illuminate?
Does the Subaru Select
Monitor or OBD-II general
scan tool indicate DTC?
Does the Subaru Select
Monitor or OBD-II general
scan tool indicate DTC?
Yes
Go to step 2. Inspection using
"Diagnostics for
Engine Start Fail-
ure". <Ref. to
EN(DOHC
TURBO)-63, Diag-
nostics for Engine
Starting Failure.>
Go to step 3. Inspection using
"General Diagnos-
tics Table". <Ref.
to EN(DOHC
TURBO)-344,
General Diagnos-
tic Table.>
Record diagnostic Repair the related
trouble code. parts.
Repair the trouble NOTE:
cause. <Ref. to If DTC is not
EN(DOHC shown on display
TURBO)-82, List although the MIL
of Diagnostic illuminates, per-
Trouble Code form diagnostics
(DTC).> Go to of MIL (CHECK
step 4. ENGINE malfunc-
tion indicator
lamp) circuit or
combination
meter. <Ref. to
EN(DOHC
TURBO)-50,
Engine Malfunc-
tion Indicator
Lamp (MIL).>
Inspect using Complete the
"Diagnostics Pro- diagnosis.
cedure with Diag-
nostic Trouble
Code (DTC)".
<Ref. to
EN(DOHC
TURBO)-90, Diag-
nostic Procedure
with Diagnostic
Trouble Code
(DTC).>
No