Subaru 2003 Legacy User manual

FUJI HEAVY INDUSTRIES LTD. G2300GE7
2003 LEGACY SERVICE MANUAL QUICK REFERENCE INDEX
BODY SECTION
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, reas-
sembling, inspection and adjustment of
components and diagnostics for guid-
ance 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 genuine parts.
All information, illustration and specifi-
cations contained in this manual are
based on the latest product information
available at the time of publication
approval.
HVAC SYSTEM
(HEATER, VENTILATOR AND A/C) AC
HVAC SYSTEM (DIAGNOSTICS) AC
AIRBAG SYSTEM AB
AIRBAG SYSTEM (DIAGNOSTICS) AB
SEAT BELT SYSTEM SB
LIGHTING SYSTEM LI
WIPER AND WASHER SYSTEMS WW
ENTERTAINMENT ET
COMMUNICATION SYSTEM COM
GLASS/WINDOWS/MIRRORS GW
BODY STRUCTURE BS
INSTRUMENTATION/DRIVER INFO IDI
SEATS SE
SECURITY AND LOCKS SL
SUNROOF/T-TOP/CONVERTIBLE TOP
(SUNROOF) SR
EXTERIOR/INTERIOR TRIM EI
EXTERIOR BODY PANELS EB
EXTERIOR/INTERIOR TRIM EI

2003 LEGACY SERVICE MANUAL QUICK REFERENCE INDEX
BODY SECTION
G2300GE7
CRUISE CONTROL SYSTEM CC
CRUISE CONTROL SYSTEM
(DIAGNOSTICS) CC
IMMOBILIZER (DIAGNOSTICS) IM

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.................................................................................7
6. Read Diagnostic Trouble Code (DTC)........................................................8
7. Clear Memory Mode....................................................................................9
8. Diagnostic Procedure for Immobilizer Indicator Light................................10
9. List of Diagnostic Trouble Code (DTC).....................................................16
10. Diagnostic Procedure with Trouble Code (DTC).......................................17

IM-2
IMMOBILIZER (DIAGNOSTICS) BASIC DIAGNOSTIC PROCEDURE
1. Basic Diagnostic Procedure
A: PROCEDURE
Step Value Yes No
1 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?
Immobilizer indicator light
blinks. Go to step 2. Check immobi- lizer indicator light
circuit.<Ref. to IM-
10, CHECK
IMMOBILIZER
INDICATOR CIR-
CUIT, INSPEC-
TION, Diagnostic
Procedure for
Immobilizer Indica-
tor Light.>
2 CHECK ILLUMINATION OF IMMOBILIZER
INDICATOR LIGHT.
Remove key from ignition switch.
Does immobilizer indicator light begin to blink 1
second after the key is removed?
Immobilizer indicator light
begins to blink. Go to step 3. Check key switch circuit. <Ref. to IM-
14, CHECK KEY
SWITCH CIR-
CUIT, INSPEC-
TION, Diagnostic
Procedure for
Immobilizer Indica-
tor Light.>
3 CHECK ENGINE START.
Turn ignition switch to START position.
Is the engine hard to start?
The engine starts. Go to step 4. Go to step 5.
4 CHECK ILLUMINATION OF IMMOBILIZER
INDICATOR LIGHT.
Turn ignition switch ON.
Does immobilizer indicator light illuminate?
Immobilizer indicator light illu-
minates. Check immobi- lizer indicator light
circuit.<Ref. to IM-
10, CHECK
IMMOBILIZER
INDICATOR CIR-
CUIT, INSPEC-
TION, Diagnostic
Procedure for
Immobilizer Indica-
tor Light.>
Immobilizer sys-
tem is normal.
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-7, HOW TO
USE SUBARU SELECT MONITOR,
OPERATION, Subaru Select Monitor.>
3) Turn ignition switch and Subaru Select
Monitor switch ON.
4) Read DTC on the display.
Is DTC indicated on display?
DTC is indicated on display. Check DTC. <Ref.
to IM-16, List of
Diagnostic Trou-
ble Code (DTC).>
Go to step 6.
Check engine
starting failure.
6 PERFORM THE DIAGNOSIS.
1) Inspect using “Diagnostic Procedure with
Trouble Code (DTC)”.<Ref. to IM-17, Diag-
nostic Procedure with Trouble Code
(DTC).>
2) Repair the trouble cause.
3) Perform clear memory mode.
4) Read DTC again.
Is DTC indicated on display?
DTC is indicated on display. Inspect using
“Diagnostic Proce-
dure with Trouble
Code”. <Ref. to
IM-17, Diagnostic
Procedure with
Trouble Code
(DTC).>
Finish the diag-
nostics.

IM-3
IMMOBILIZER (DIAGNOSTICS)
GENERAL DESCRIPTION
2. General Description
A: CAUTION
CAUTION:
•Airbag 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.
•Be careful not to damage airbag system wir-
ing 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 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.
•When 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 seconds.
•If engine fails to start with a registered
ignition key, detach ignition key from ignition
switch and wait for approximately 1 second
until immobilizer indicator light begins to flash.
Start engine again.
•Before checking diagnostic items, obtain all
keys for vehicle to be checked possessed by
owner.
IM-00037
IM-00038
(1) Ignition switch position
(2) SEC.
IM-00039
ON
OFF
58
( 1 )
( 2 )

IM-4
IMMOBILIZER (DIAGNOSTICS) GENERAL DESCRIPTION
B: PREPARATION TOOL
1. SPECIAL TOOLS
2. GENERAL TOOLS
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
24082AA210
(Newly adopted tool) CARTRIDGE Troubleshooting for electrical systems.
22771AA030 SELECT MONITOR
KIT Troubleshooting for electrical systems. •English:
22771AA030 (Without printer)
•German:
22771AA070 (Without printer)
•French:
22771AA080 (Without printer)
•Spanish:
22771AA090 (Without printer)
TOOL NAME REMARKS
Circuit Tester Used for measuring resistance, voltage and ampere.
ST24082AA210
ST22771AA030

IM-5
IMMOBILIZER (DIAGNOSTICS)
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)
(2) Immobilizer indicator light (LED
bulb) (4) Transponder
IM-00040
( 1 ) ( 2 )
( 3 )
( 4 )

IM-6
IMMOBILIZER (DIAGNOSTICS)
IMMOBILIZER CONTROL MODULE I/O SIGNAL
4. Immobilizer Control Module I/O Signal
A: SCHEMATIC
<Ref. to WI-236, SCHEMATIC, Immobilizer System.>

IM-7
IMMOBILIZER (DIAGNOSTICS)
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 (A) 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
Subaru 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 infor-
mation about how to indicate DTC.<Ref. to IM-8,
Read Diagnostic Trouble Code (DTC).>
3. INTERFACE CHECK
NOTE:
The communication line between ECM and IMM
ECM can be checked in «System Operation Check
Mode». This is referred to as “interface 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 interface 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
shortcircuitis not adiagnostic item.This completes
interface check.
6) If a problem is detected, repair. <Ref. to IM-18,
DTC P1572 IMM CIRCUIT FAILURE (EXCEPT
ANTENNA CIRCUIT), Diagnostic Procedure with
Trouble Code (DTC).>
CC-00028
ST
CC-00029
CC-00076
( A )
(1) Power switch
CC-00045
( 1 )

IM-8
IMMOBILIZER (DIAGNOSTICS)
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). <Ref. to IM-16, List of Diagnostic Trouble
Code (DTC).>