Subaru 2001 Forester User manual

This service manual has been prepared
to provide SUBARU service personnel
with the necessary information and data
for the correct maintenance and repair of
SUBARU vehicles.
This manual includes the procedures for
maintenance, disassembling, reassem-
bling, inspection and adjustment of com-
ponents and diagnostics for guidance of
experienced mechanics.
Please peruse and utilize this manual
fully to ensure complete repair work for
satisfying our customers by keeping their
vehicle in optimum condition. When
replacement of parts during repair work is
needed, be sure to use SUBARU genu-
ine parts.
All information, illustration and specifica-
tions contained in this manual are based
on the latest product information avail-
able at the time of publication approval.
FUJI HEAVY INDUSTRIES LTD.
2001 FORESTER SERVICE MANUAL QUICK REFERENCE INDEX
BODY SECTION
G8050GE6

IMMOBILIZER (DIAGNOSTICS) IM
Page
1. Basic Diagnostic Procedure........................................................................2
2. General Description.....................................................................................3
3. Electrical Components Location..................................................................5
4. Immobilizer Control Module I/O Signal.......................................................6
5. Subaru Select Monitor...............................................................................14
6. Read Diagnostic Trouble Code.................................................................16
7. Clear Memory Mode..................................................................................18
8. Diagnostics Chart for Immobilizer Indicator Light.....................................19
9. List of Diagnostic Trouble Code................................................................25
10. Diagnostics Chart with Trouble Code .......................................................26

1. Basic Diagnostic Procedure
S009501
A: PROCEDURE S009501E45
No. Step Check Yes No
1 CHECK ILLUMINATION OF IMMOBILIZER
INDICATOR LIGHT.
Turn ignition switch ON.
Does immobilizer indicator
light illuminate? Go to step 2. Go to step 3.
2 CHECK ENGINE START.
Turn ignition switch to START position. Is the engine hard to start? Go to step 5. Go to step 3.
3 CHECK ILLUMINATION OF IMMOBILIZER
INDICATOR LIGHT.
1) Turn ignition switch to OFF or ACC posi-
tion.
2) Wait at least 60 seconds.
Does immobilizer indicator
light blink? Go to step 4. Check immobilizer indicator light cir-
cuit. <Ref. to
IM-19, CHECK
IMMOBILIZER
INDICATOR
CIRCUIT,
INSPECTION,
Diagnostics Chart
for Immobilizer
Indicator Light.>
4 CHECK ILLUMINATION OF IMMOBILIZER
INDICATOR LIGHT.
Remove key from ignition switch.
Does immobilizer indicator
light begin to blink 5 sec-
onds after the key is
removed?
The immobilizer
system is OK. Check key switch circuit. <Ref. to
IM-22, CHECK
KEY SWITCH
CIRCUIT,
INSPECTION,
Diagnostics Chart
for Immobilizer
Indicator Light.>
5 CHECK INDICATION OF DTC ON DISPLAY.
1) Turn ignition switch OFF.
2) Connect the Subaru Select Monitor to data
link connector. <Ref. to IM-14, OPERATION,
Subaru Select Monitor.>
3) Turn ignition switch and Subaru Select
Monitor switch ON.
4) Read DTC on the display.
Is trouble code indicated on
display? Go to step 6. Repair the related parts.
6 PERFORM THE DIAGNOSIS.
1) Inspect using “Diagnostics Chart with
Trouble Code”. <Ref. to IM-26, Diagnostics
Chart with Trouble Code.>
2) Repair the trouble cause.
3) Perform clear memory mode.
4) Read DTC again.
Is trouble code indicated on
display? Inspect using “Diagnostic Chart
with Trouble
Code”. <Ref. to
IM-26, Diagnos-
tics Chart with
Trouble Code.>
Finish the diag-
nostics.
IM-2
BASIC DIAGNOSTIC PROCEDURE
Immobilizer (Diagnostics)

2. General Description S009001
A: CAUTION S009001A03
CAUTION:
쐌Airbag system wiring harness is routed near
the immobilizer control module. All airbag sys-
tem wiring harness and connectors are colored
yellow. Do not use electrical test equipment on
these circuits.
쐌Be careful not to damage airbag system wir-
ing harness when servicing the immobilizer
control module.
쐌While diagnostic items are being checked,
do not operate radios, portable telephones, etc.
which emit electromagnetic waves near or
inside the vehicle.
B6M0616
쐌When ignition switch is being turned ON or
OFF while diagnostic items are being checked,
do not allow keys with different ID codes close
to the ignition switch. If ignition key is in a key
holder, remove it from holder before carrying
out diagnoses.
B6M0617
쐌When repeatedly turning ignition ON or OFF
while diagnostic items are being checked, it
should be switched in cycles of “ON”for at
least 5 seconds →“OFF”for at least 8 sec-
onds.
B6M0618A
쐌If engine fails to start with a registered igni-
tion key, detach ignition key from ignition
switch and wait for approximately 1 second
until immobilizer indicator light begins to flash.
Start engine again.
쐌Before checking diagnostic items, obtain all
keys for vehicle to be checked possessed by
owner.
IM-3
GENERAL DESCRIPTION Immobilizer (Diagnostics)

B: PREPARATION TOOL S009001A17
1. SPECIAL TOOLS S009001A1701
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
B2M3876
24082AA150
(Newly adopted tool) CARTRIDGE Troubleshooting for electrical systems.
B2M3877
22771AA030 SELECT MONITOR
KIT Troubleshooting for electrical systems. 쐌English:
22771AA030 (Without printer)
쐌German:
22771AA070 (Without printer)
쐌French:
22771AA080 (Without printer)
쐌Spanish:
22771AA090 (Without printer)
2. GENERAL TOOLS S009001A1702
TOOL NAME REMARKS
Circuit Tester Used for measuring resistance, voltage and ampere.
IM-4
GENERAL DESCRIPTION
Immobilizer (Diagnostics)

3. Electrical Components
Location S009507
A: LOCATION S009507A13
S6M0413A
(1) Antenna
(2) Immobilizer indicator light (LED
bulb)
(3) Immobilizer control module (IMM
ECM)
(4) Transponder
NOTE:
IMM ECM location for RHD model is symmetrically
opposite.
IM-5
ELECTRICAL COMPONENTS LOCATION Immobilizer (Diagnostics)

4. Immobilizer Control Module I/O Signal S009517
A: SCHEMATIC S009517A21
1. IMMOBILIZER LHD WITH OBD MODEL S009517A2103
SL91-20A
IM-6
IMMOBILIZER CONTROL MODULE I/O SIGNAL
Immobilizer (Diagnostics)

SL91-20B
IM-7
IMMOBILIZER CONTROL MODULE I/O SIGNAL
Immobilizer (Diagnostics)

2. IMMOBILIZER LHD WITHOUT OBD
MODEL S009517A2104
SL91-21A
IM-8
IMMOBILIZER CONTROL MODULE I/O SIGNAL
Immobilizer (Diagnostics)

SL91-21B
IM-9
IMMOBILIZER CONTROL MODULE I/O SIGNAL
Immobilizer (Diagnostics)

3. IMMOBILIZER RHD WITH OBD MODEL
S009517A2105
SR91-20A
IM-10
IMMOBILIZER CONTROL MODULE I/O SIGNAL
Immobilizer (Diagnostics)

SR91-20B
IM-11
IMMOBILIZER CONTROL MODULE I/O SIGNAL
Immobilizer (Diagnostics)

4. IMMOBILIZER RHD WITHOUT OBD
MODEL S009517A2106
SR91-21A
IM-12
IMMOBILIZER CONTROL MODULE I/O SIGNAL
Immobilizer (Diagnostics)

SR91-21B
IM-13
IMMOBILIZER CONTROL MODULE I/O SIGNAL
Immobilizer (Diagnostics)

5. Subaru Select Monitor S009503
A: OPERATION S009503A16
1. HOW TO USE SUBARU SELECT
MONITOR S009503A1605
1) Prepare Subaru Select Monitor kit.
S2M0285
2) Connect diagnosis cable to Subaru Select
Monitor.
3) Insert cartridge into Subaru Select Monitor.
<Ref. to IM-4, SPECIAL TOOLS, PREPARATION
TOOL, General Description.>
S2M0286A
4) Connect Subaru Select Monitor to data link
connector.
(1) Data link connector located in the lower por-
tion of the instrument panel (on the driver’s
side).
S2M2157
(2) Connect diagnosis cable to data link con-
nector.
CAUTION:
Do not connect scan tools except for Subaru
Select Monitor.
5) Turn ignition switch to ON (engine OFF) and
Subaru Select Monitor switch to ON.
S2M0288A
6) Using Subaru Select Monitor, call up diagnostic
trouble code(s) and various data, then record
them.
2. READ DIAGNOSTIC TROUBLE CODE
(DTC) FOR ENGINE. S009503A1606
Refer to Read Diagnostic Trouble Code for infor-
mation about how to indicate DTC. <Ref. to IM-16,
Read Diagnostic Trouble Code.>
3. INTERFACE CHECK S009503A1604
NOTE:
Communication line between ECM and IMM ECM
can be checked in ⰆSystem Operation Check
ModeⰇ. This is referred to as “interface check”.
1) Connect select monitor.
2) Set the ⰆSystem Operation Check ModeⰇ
menu display screen then select ⰆImmobilizer
SystemⰇ.
3) Screen indicates as shown.
S6M0210
IM-14
SUBARU SELECT MONITOR
Immobilizer (Diagnostics)

4) Start interface check.
5) Does “Communication Line not Shorted”
appear on screen?
If “YES”. Go to step 6).
If “NO”. Go to step 7).
S6M0211
6) After diagnostic results, it is determined that
short circuit is not a diagnostic item. This com-
pletes interface check.
7) If a problem is detected, repair. <Ref. to IM-27,
DTC P1572 —IMM CIRCUIT FAILURE (EXCEPT
ANTENNA CIRCUIT) —, Diagnostics Chart with
Trouble Code.>
IM-15
SUBARU SELECT MONITOR Immobilizer (Diagnostics)

6. Read Diagnostic Trouble Code S009508
A: OPERATION S009508A16
1. WITH SUBARU SELECT MONITOR S009508A1601
1) On the ⰆMain MenuⰇdisplay screen, select the {Each System Check} and press the [YES] key.
2) On the ⰆSystem Selection MenuⰇdisplay screen, select the {Engine Control System} and press the
[YES] key.
3) Press the [YES] key after displayed the information of engine type.
4) On the ⰆEngine DiagnosisⰇdisplay screen, select the {Diagnostic Code(s) Display} and press the [YES]
key.
5) On the ⰆDiagnostic Code(s) DisplayⰇdisplay screen, select the {Current Diagnostic Code(s)} or {His-
tory Diagnostic Code(s)} and press the [YES] key.
NOTE:
쐌For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL.
쐌For detailed concerning diagnostic trouble codes, refer to the List of Diagnostic Trouble Code (DTC).
<Ref. to IM-25, LIST, List of Diagnostic Trouble Code.>
2. WITHOUT SUBARU SELECT MONITOR S009508A1602
No. Step Check Yes No
1 CHECK STATUS OF CHECK ENGINE MAL-
FUNCTION INDICATOR LAMP (MIL).
1) Turn ignition switch to OFF.
2) Connect read memory connector. <Ref. to
EN(SOHCw/oOBD)-10, LOCATION, Electrical
Components Location.>
3) Turn ignition switch to ON.
Does the MIL come on? Go to step 2. Check the follow-
ing and repair if
necessary.
NOTE:
쐌Open or short
circuit in engine
control module
power supply or
ground line
쐌Open or short
circuit in CHECK
ENGINE malfunc-
tion indicator lamp
2 CHECK DIAGNOSTIC TROUBLE CODE
(DTC). Does the MIL indicate diag- nostic trouble code (DTC)? Record diagnostic trouble code
(DTC). Then turn
ignition switch to
OFF, disconnect
read memory con-
nector.
Complete read
diagnostic trouble
code. Turn ignition
switch to OFF and
disconnect read
memory connec-
tor.
IM-16
READ DIAGNOSTIC TROUBLE CODE
Immobilizer (Diagnostics)

The CHECK ENGINE malfunction indicator lamp (MIL) flashes the code corresponding to the faulty parts.
The long segment (1.3 seconds ON) indicates a “ten”, and the short segment (0.2 seconds ON) signifies
“one”. And middle segment (0.5 seconds ON) means OK code.
NOTE:
쐌For detailed concerning diagnostic trouble codes, refer to the List of Diagnostic Trouble Code (DTC).
<Ref. to IM-25, LIST, List of Diagnostic Trouble Code.>
S2M1768A
IM-17
READ DIAGNOSTIC TROUBLE CODE Immobilizer (Diagnostics)

7. Clear Memory Mode S009513
A: OPERATION S009513A16
1. WITH SUBARU SELECT MONITOR
S009513A1601
1) On the ⰆMain MenuⰇdisplay screen, select
the {2. Each System Check} and press the [YES]
key.
2) On the ⰆSystem Selection MenuⰇdisplay
screen, select the {Engine Control System} and
press the [YES] key.
3) Press the [YES] key after displayed the infor-
mation of engine type.
4) On the ⰆEngine DiagnosisⰇdisplay screen,
select the {Clear Memory} and press the [YES]
key.
5) When the ‘Done’ and ‘Turn Ignition Switch OFF’
are shown on the display screen, turn the Subaru
Select Monitor and ignition switch to OFF.
NOTE:
쐌After the memory has been cleared, the ISC
must be initialized. To do this, turn the ignition
switch to the ON position. Wait 3 seconds before
starting the engine.
쐌For detailed operation procedure, refer to the
SUBARU SELECT MONITOR OPERATION
MANUAL.
2. WITHOUT SUBARU SELECT MONITOR S009513A1602
No. Step Check Yes No
1 CHECK STATUS OF CHECK ENGINE MAL-
FUNCTION INDICATOR LAMP (MIL).
1) Turn ignition switch to OFF.
2) Set shift lever to neutral position (MT
vehicles), or set selector lever to “P” position
(AT vehicles).
3) Connect test mode connector and read
memory connector.
4) Turn ignition switch to ON.
Does the MIL come on? Go to step 2. Check the follow-
ing and repair if
necessary.
NOTE:
쐌Open or short
circuit in engine
control module
power supply or
ground line
쐌Open or short
circuit in CHECK
ENGINE malfunc-
tion indicator lamp
2 CHECK DIAGNOSTIC TROUBLE CODE
(DTC).
1) Set selector lever “N” position, and then set
selector lever to “P” position again (AT
vehicles only).
2) Start the engine.
3) Drive vehicle at speed greater than 11
km/h (7 MPH) for at least one minute.
4) Warm-up engine above 2,000 rpm.
Does the MIL indicate diag-
nostic trouble code (DTC)?
<Ref. to IM-25, LIST, List of
Diagnostic Trouble Code.>
Record diagnostic
trouble code.
Repair the trouble
cause.
Turn ignition
switch to OFF,
Disconnect read
memory connec-
tor and test mode
connector. Com-
plete clear
memory mode.
IM-18
CLEAR MEMORY MODE
Immobilizer (Diagnostics)

8. Diagnostics Chart for Immobilizer Indicator Light S009641
A: INSPECTION S009641A10
1. CHECK IMMOBILIZER INDICATOR CIRCUIT S009641A1001
WIRING DIAGRAM (WITH OBD MODEL):
S6M0513
IM-19
DIAGNOSTICS CHART FOR IMMOBILIZER INDICATOR LIGHT
Immobilizer (Diagnostics)