immobilizer SUBARU FORESTER 2004 Service Owner's Guide

IM-3
IMMOBILIZER (DIAGNOSTIC)
General Description
2. General Description
A: CAUTION
CAUTION:
 The airbag system wiring harnesses rout-
ed near the immobilizer control module. All
airbag system wiring harness and connec-
tors are colored yellow. Do not use electrical
test equipment on these circuits.
 Be careful not to damage the airbag system
wiring harness when servicing the immobilizer
control module.
 While diagnostic items are being checked, do
not operate radios, portable telephones, etc.
which emit electromagnetic waves near or
inside the vehicle.
 When the 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 the ignition key is in a key
holder, remove it from the holder before carrying
out diagnoses. When repeatedly turning the ignition switch
to 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 seconds.
 If the engine fails to start with a registered
ignition key, detach the ignition key from ignition
switch and wait for approx. 1 second until immobi-
lizer warning light begins to flash. Start the engine
again.
 Before checking the diagnostic items, obtain
all keys for the vehicle to be checked possessed
by owner.
IM-00001
IM-00002
(1) Ignitions witch position
(2) Sec.
IM-00003
ON
OFF
58
(2) (1)

IM-4
IMMOBILIZER (DIAGNOSTIC)
General Description
B: PREPARATION TOOL
1. SPECIAL TOOL
2. GENERAL TOOL
ILLUSTRATION TOOLNUMBER DESCRIPTION REMARKS
24082AA230
(Newly adopted tool)CARTRIDGE Troubleshooting for electrical systems.
22771AA030 SUBARUSELECT
MONITOR KITTroubleshooting for electrical systems.
English:
22771AA030 (Without printer)
German:
22771AA070 (Without printer)
 French:
22771AA080 (Without printer)
 Spanish:
22771AA090 (Without printer)
TOOLNAME REMARKS
Circuit tester Used for measuring resistance, voltage and ampere.
ST24082AA230
ST22771AA030

IM-5
IMMOBILIZER (DIAGNOSTIC)
Electrical Components Location
3. Electrical Components Location
A: LOCATION
NOTE:
IMM ECM location for RHD model is symmetrically
opposite.
(1) Antenna (3) Immobilizer control module (IMM
ECM)(4) Transponder
(2) Immobilizer warning light (LED)
IM-00004
(1)
(2)
(3)(4)

IM-6
IMMOBILIZER (DIAGNOSTIC)
Immobilizer Control Module I/O Signal
4. Immobilizer Control Module I/O
Signal
A: WIRING DIAGRAM
1. IMMOBILIZER
System.>

IM-7
IMMOBILIZER (DIAGNOSTIC)
Subaru Select Monitor
5. Subaru Select Monitor
A: OPERATION
1. HOW TO USE SUBARU SELECT MONI-
TOR
1) Prepare the Subaru Select Monitor kit.
2) Connect the diagnosis cable to Subaru Select
Monitor.
3) Insert the cartridge into Subaru Select Monitor.
4) Connect the Subaru Select Monitor to data link
connector.
(1) Data link connector is located in the lower
portion of the instrument panel (on driver’s side).
(2) Connect the diagnosis cable to data link
connector.
CAUTION:
Do not connect the scan tools except for Suba-
ru Select Monitor.5) Turn the ignition switch to ON (engine OFF), and
then Subaru Select Monitor switch to ON.
6) Using the Subaru Select Monitor, call up any
DTCs and various data, and then record them.
2. READ DIAGNOSTIC TROUBLE CODE
(DTC) FOR ENGINE.
Refer to Read Diagnostic Trouble Code for informa-
tion about how to indicate DTC. Diagnostic Trouble Code (DTC).>
3. COMMUNICATION LINE CHECK
NOTE:
The communication line between ECM and IMM
ECM can be checked in «System Operation Check
Mode». This is referred to as “communication line
check”.
1) Connect the Subaru Select Monitor.
2) Set the «System Operation Check Mode» menu
display screen, and then select {Immobilizer Sys-
tem}.
3) Start the communication line check.
4) Does “Communication Line not Shorted” appear
on screen?
If “YES”. Go to step 5).
If “NO”. Go to step 6).
5) After diagnostic results, it is determined that the
short circuit is not a diagnostic item. This completes
communication line check.
6) If a problem is detected, repair. DTC P1572 IMM CIRCUIT FAILURE (EXCEPT
ANTENNA CIRCUIT), Diagnostics Procedure with
Diagnostic Trouble Code (DTC).>
CC-00028
CC-00029
ME-00325
(1) Power switch
CC-00045
(1)

IM-8
IMMOBILIZER (DIAGNOSTIC)
Read Diagnostic Trouble Code (DTC)
6. Read Diagnostic Trouble
Code (DTC)
A: OPERATION
1) On the «Main Menu» display screen, select the
{Each System Check}, and then press the [YES] key.
2) On the «System Selection Menu» display screen,
select the {Engine Control System}, and then press
the [YES] key.
3) Press the [YES] key after displayed information
of engine type.
4) On the «Engine Diagnosis» display screen, se-
lect the {Diagnostic Code(s) Display}, and then
press the [YES] key.
5) On the «Diagnostic Code(s) Display» display
screen, select the {Current Diagnostic Code(s)} or
{History Diagnostic Code(s)}, and then press the
[YES] key.
NOTE:
 For detailed operation procedure, refer to the
SUBARU SELECT MONITOR OPERATION MAN-
UAL.
 For detailed concerning diagnostic trouble codes,
refer to the List of Diagnostic Trouble Code (DTC).
Code (DTC).>

IM-9
IMMOBILIZER (DIAGNOSTIC)
Clear Memory Mode
7. Clear Memory Mode
A: OPERATION
1) On the «Main Menu» display screen, select the
{Each System Check}, and then press the [YES] key.
2) On the «System Selection Menu» display screen,
select the {Engine Control System}, and then press the
[YES] key.
3) Press the [YES] key after displayed information
of engine type.
4) On the «Engine Diagnosis» display screen, se-
lect the {Clear Memory}, and then press the [YES]
key.
5) When the `Done’ is shown on the display screen,
turn the Subaru Select Monitor and ignition switch
to OFF.
NOTE:
 After the memory has been cleared, the ISC must be
initialized.To do this, turn the ignition switch to ON po-
sition. Wait 3 seconds before starting the engine.
 For detailed operation procedure, refer to the SUB-
ARUSELECT MONITOR OPERATION MANUAL.

IM-10
IMMOBILIZER (DIAGNOSTIC)
Diagnostics Chart for Immobilizer Warning Light
8. Diagnostics Chart for Immobilizer Warning Light
A: INSPECTION
1. CHECK IMMOBILIZER WARNING CIRCUIT
WIRING DIAGRAM:
IM-00081
F60
B21
RHD
SBF-1
SBF-5SBF-4
BATTERY
IMMOBILIZER
WARNING
LIGHT COMBINATION METER
B141IMM ECM
B37
i2
i2
B37
i12
B37
i2
LHD
RHDLHD
6
RHD
M/B No.2
F/B No.11
IGNITION
SWITCH
91211102
B8
3: RHD MODEL
1: Non-turbo AT MODEL: 14
: MT MODEL AND
TURBO AT MODEL:4
i12B141
34 12
89
10 11125
67
219
32
B38
1234 5610 11 12 13 14 15716
23 3019 20
22 26 27 28 29817
24 3118
25
123456789101112131415161718192021222324252627282930
LHDB37
34 12 89
10 11
12 13 14 15 16 17 18 19 20 21 22 23 24567
i10
1
23456789
10
B:
E
A:i10 B:
i11C:
: LHD TURBO MODELLT
: EXCEPT LHD TURBO MODEL
XL
34 12 8910
1112 13 14 15 161718
19 20 21 22567
i2RHD
F2LHD
LHD
LHD
7
F44B61
RHD
RHD
LHD
: LHD MODEL
1
2
i11 C:
LHD
LHD
18
i3
B38
RHD
RHD
3
XL
LT
XL
LT9
1616
F2B100
B21
E2
F60
E3
LHD
RHD
2: LHD MODEL: A4
: RHD MODEL: C5
3: Non-turbo AT MODEL: 22
: MT MODEL AND
TURBO AT MODEL: 18
A:
:
AT:
23 1789 1011121314 15
16 1718456
i2RHDMT:
1234 5678910 11 12 13 14 15 16 17 18 19 20123
4
56
78
9
1011 12
1314 15 16
1234568791011121314
F44
12345678

IM-11
IMMOBILIZER (DIAGNOSTIC)
Diagnostics Chart for Immobilizer Warning Light
Step Check Yes No
1 CHECK IMMOBILIZER WARNING LIGHT.
1) Turn the ignition switch to OFF.
2) Disconnect the harness connector from
IMM ECM.
3) Connect a resistor (750 Ω) between IMM
ECM harness connector terminal No. 9 and
chassis ground.Does the immobilizer warning
light illuminate?Go to step 2.Go to step 5.
2 CHECK IMM ECM GROUND CIRCUIT.
Measure the resistance between IMM ECM
harness connector terminal and chassis
ground.
Connector & terminal
(B141) No. 2, No. 3 — Chassis ground:Is the resistance less than 10
Ω?Go to step 3.Repair the open
circuit of IMMECM
ground circuit.
3 CHECK IMM ECM IGNITION CIRCUIT.
1) Turn the ignition switch to ON. (engine
OFF.)
2) Measure the voltage between IMM ECM
harness connector terminal and chassis
ground.
Connector & terminal
(B141) No. 12 (+) — Chassis ground(
−):Is the voltage more than 10 V? Go to step 4.Check the harness
for open or short
between IMM
ECM and ignition
switch.
4 CHECK IMM ECM POWER SUPPLY CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Measure the voltage between IMM ECM
harness connector terminal and chassis
ground.
Connector & terminal
(B141) No. 10, No. 11 (+) — Chassis
ground(
−):Is the voltage more than 10 V? Replace the IMM
ECM 37, Immobilizer
Control Module.>
and then replace
all ignition keys
(including the tran-
sponder). Then
perform teaching
operation. Refer to
teaching opera-
tion manual (Pub.
No. S0820GZ).Check the harness
for open or short
between IMM
ECM and fuse.
5 CHECK COMBINATION METER CIRCUIT.
1) Remove the combination meter. IDI-10, Combination Meter Assembly.>
2) Measure the voltage between combination
meter harness connector terminal and chassis
ground.
Connector & terminal
(i10) No. 8 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 6.Check the harness
for open or short
between combina-
tion meter and
fuse.
6 CHECK COMBINATION METER CIRCUIT.
Measure the resistance between IMM ECM
harness connector terminal and combination
meter harness connector terminal.
Connector & terminal
LHD model
(B141) No. 9 — (i12) No. 4:
RHD model
(B141) No. 9 — (i11) No. 5:Is the resistance less than 10
Ω?Faulty LED.
Replace the com-
bination meter
printed circuit.
DISASSEMBLY,
Combination
Meter Assembly.>Repair the har-
ness or connector.

IM-12
IMMOBILIZER (DIAGNOSTIC)
Diagnostics Chart for Immobilizer Warning Light
2. CHECK KEY WARNING SWITCH CIRCUIT
WIRING DIAGRAM:
IM-00006
B74
B61
F44
KEY WARNING
SWITCH
B141IMM ECM
LHD
RHDLHD
RHD
BATTERYM/B No.6
4
12
4
B74
1
2
B141
34 12
89
10 11125
67
F44
3
1
56
78
LHD: LHD MODEL
: RHD MODEL
RHD
2
4