Subaru 2004 LEGACY User manual

FUJI HEAVY INDUSTRIES LTD. G2320GE7
2004 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 (AUTO A/C)
(DIAGNOSTICS) AC(diag)
AIRBAG SYSTEM AB
AIRBAG SYSTEM (DIAGNOSTICS) AB(diag)
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

2003 LEGACY SERVICE MANUAL QUICK REFERENCE INDEX
BODY SECTION
G2320GE7
CRUISE CONTROL SYSTEM CC
CRUISE CONTROL SYSTEM
(DIAGNOSTICS) CC(diag)
IMMOBILIZER (DIAGNOSTICS) IM(diag)
LAN SYSTEM (DIAGNOSTICS) LAN(diag)

IMMOBILIZER (DIAGNOSTICS)
IM(diag)
Page
1. Basic Diagnostic Procedure........................................................................2
2. General Description ....................................................................................4
3. Electrical Component Location ...................................................................6
4. Immobilizer Control Module I/O Signal........................................................7
5. Subaru Select Monitor.................................................................................8
6. Read Diagnostic Trouble Code (DTC)........................................................9
7. Clear Memory Mode..................................................................................10
8. Diagnostics Chart for Immobilizer Indicator Light......................................11
9. List of Diagnostic Trouble Code (DTC).....................................................15
10. Diagnostic Procedure with Diagnostic Trouble Code (DTC).....................17

IM(diag)-2
IMMOBILIZER (DIAGNOSTICS) Basic Diagnostic Procedure
1. Basic Diagnostic Procedure
A: PROCEDURE
Step Check Yes No
1 CHECK IMMOBILIZER WARNING LIGHT.
1) Turn the ignition switch to “OFF” or “ACC”.
2) Wait for more than 60 seconds.
Does the immobilizer warning
light blink? Go to step 2. Check the immobi- lizer warning light
circuit. <Ref. to
IM(diag)-11,
CHECK IMMOBI-
LIZER INDICA-
TOR CIRCUIT,
INSPECTION,
Diagnostics Chart
for Immobilizer
Indicator Light.>
2 CHECK KEY SWITCH.
Remove the key from ignition switch. Does the immobilizer warning light blink within 1 second after
removing ignition key?
Go to step 3. Check the key
switch circuit.
<Ref. to IM(diag)-
13, CHECK KEY
SWITCH CIR-
CUIT, INSPEC-
TION, Diagnostics
Chart for Immobi-
lizer Indicator
Light.>
3 CHECK IMMOBILIZER WARNING LIGHT.
Turn the ignition switch to ON. Does the immobilizer warning light off? Go to step 5. Go to step 4.
4 CHECK ENGINE START.
Turn the ignition switch to START. Does the starter operate? Check the LAN communication cir-
cuit. <Ref. to
LAN(diag)-2,Basic
Diagnostic Proce-
dure.>
Check the DTC
display (body inte-
grated unit). Go to
step 7.
5 CHECK ENGINE START.
Turn the ignition switch to START. Does the starter operate? Go to step 6. Check the LAN communication cir-
cuit. <Ref. to
LAN(diag)-2,Basic
Diagnostic Proce-
dure.>
6 CHECK ENGINE START.
Turn the ignition switch to START. Does the engine start? Immobilizer sys- tem is OK. Check the DTC display (ECM). Go
to step 7.
7 CHECK INDICATION OF DTC ON DISPLAY.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data
link connector. <Ref. to IM(diag)-8, Subaru
Select Monitor.>
3) Turn the ignition switch and Subaru Select
Monitor switch to ON.
4) Read DTC on display.
Is the DTC displayed on
screen? Go to step 8. Repair the related parts.

IM(diag)-3
IMMOBILIZER (DIAGNOSTICS)
Basic Diagnostic Procedure
8 PERFORM THE DIAGNOSIS.
1) Inspect using the “Diagnostic Procedure
with Diagnostic Trouble Code (DTC)”.
<Ref. to IM(diag)-17, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
2) Repair the trouble cause.
3) Perform clear memory mode.
4) Read DTC again.
Is the DTC displayed on
screen? Inspect using the “Diagnostic Proce-
dure with Diagnos-
tic Trouble Code
(DTC)”. <Ref. to
IM(diag)-17, Diag-
nostic Procedure
with Diagnostic
Trouble Code
(DTC).>
Finish the diagno-
sis.
Step Check Yes No

IM(diag)-4
IMMOBILIZER (DIAGNOSTICS) General Description
2. General Description
A: CAUTION
CAUTION:
• All airbag system wiring harnesses and con-
nectors are yellow. Do not use the electrical
test equipment on these circuits.
• Be careful not to damage the airbag system
wiring harness.
• While diagnostic items are being checked, do
not operate radios, portable telephones, etc.
which emit electromagnetic waves near or in-
side the vehicle.
• When turning the ignition switch to 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 diagnosis.
• 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 ig-
nition key, detach the ignition key from ignition
switch and wait for approx. 1 second until im-
mobilizer indicator light begins to flash. And
then start the engine again.
• Before checking the diagnostic items, obtain
all keys for the vehicle to be checked pos-
sessed by owner.
IM-00001
IM-00002
(1) Ignition switch position
(2) Sec.
IM-00003
ON
OFF
58
(2)
(1)

IM(diag)-5
IMMOBILIZER (DIAGNOSTICS)
General Description
B: PREPARATION TOOL
1. SPECIAL TOOL
2. GENERAL TOOL
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
24082AA230 CARTRIDGE Troubleshooting for electrical system.
22771AA030 SUBARU SELECT
MONITOR KIT Troubleshooting for electrical system. • 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.
ST24082AA23
0
ST22771AA03
0

IM(diag)-6
IMMOBILIZER (DIAGNOSTICS) Electrical Component Location
3. Electrical Component Location
A: LOCATION
NOTE:
Body integrated unit location for RHD model is symmetrically opposite.
(1) Antenna (3) Body integrated unit (4) Transponder
(2) Immobilizer indicator light (LED
bulb)
IM-00083
(2)
(4)
(1)
(3)

IM(diag)-7
IMMOBILIZER (DIAGNOSTICS)
Immobilizer Control Module I/O Signal
4. Immobilizer Control Module
I/O Signal
A: WIRING DIAGRAM
1. IMMOBILIZER
<Ref. to WI-246, WIRING DIAGRAM, Immobilizer
System.>

IM(diag)-8
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 to 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 the 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
the Subaru Select Monitor switch to ON.
6) Using the Subaru Select Monitor, call up DTCs
and various data, then record them.
2. READ DIAGNOSTIC TROUBLE CODE
(DTC) FOR ENGINE AND BODY INTEGRAT-
ED UNIT
Refer to Read Diagnostic Trouble Code for infor-
mation about how to indicate DTC. <Ref. to IM(di-
ag)-9, Read Diagnostic Trouble Code (DTC).>
3. COMMUNICATION LINE CHECK
NOTE:
The communication line between ECM and body
integrated module can be checked in “System Op-
eration Check Mode”. This is referred to as “Com-
munication line check”.
1) Connect the Subaru Select Monitor.
2) On the «System operation check mode» display,
select the {security system}.
3) Start the communication line check.
4) Is «Communication Line not Shorted» displayed
on screen?
If displayed, go to step 5).
If “NO”, go to step 6).
5) After diagnostic results, it is determined that the
circuit is not shorted. Finish the communication line
check.
6) If a problem is detected, repair the trouble
cause. <Ref. to IM(diag)-22, DTC P1572 IMM CIR-
CUIT FAILURE (EXCEPT ANTENNA CIRCUIT),
Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
CC-0002
8
CC-0002
9
IM-00084
(1) Power switch
CC-0004
5
(1)

IM(diag)-9
IMMOBILIZER (DIAGNOSTICS)
Read Diagnostic Trouble Code (DTC)
6. Read Diagnostic Trouble
Code (DTC)
A: OPERATION
1. ECM
1) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display
screen, select the {Engine Control System} and
press the [YES] key.
3) Press the [YES] key after the information of en-
gine type is displayed.
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 DTC, refer to the List of
DTC. <Ref. to IM(diag)-15, LIST, List of Diagnostic
Trouble Code (DTC).>
2. BODY INTEGRATED UNIT
1) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display
screen, select the {Integ. unit mode} and press the
[YES] key.
3) Press the [YES] key after the {Integ. unit mode}
is displayed.
4) On the «Integ. unit mode failure diag» display
screen, select the {Diagnostic Code(s) Display}
and press the [YES] key.
NOTE:
• For detailed operation procedure, refer to the
SUBARU SELECT MONITOR OPERATION MAN-
UAL.
• For detailed concerning DTC, refer to the List of
DTC. <Ref. to IM(diag)-15, LIST, List of Diagnostic
Trouble Code (DTC).>

IM(diag)-10
IMMOBILIZER (DIAGNOSTICS) Clear Memory Mode
7. Clear Memory Mode
A: OPERATION
1. ECM
1) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display
screen, select the {Engine Control System} and
press the [YES] key.
3) Press the [YES] key after the information of en-
gine type is displayed.
4) On the «Engine Diagnosis» display screen, se-
lect the {Clear Memory} and press the [YES] key.
5) When the ‘Done’ are shown on the display
screen, turn the Subaru Select Monitor and ignition
switch to OFF.
NOTE:
• After the memory has been cleared, the idle air
control solenoid valve must be initialized. To exe-
cute this procedure, turn the ignition switch to ON.
Wait 3 seconds before starting the engine.
• For detailed operation procedure, refer to the
SUBARU SELECT MONITOR OPERATION MAN-
UAL.
2. BODY INTEGRATED UNIT
1) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display
screen, select the {Integ. unit mode} and press the
[YES] key.
3) Press the [YES] key after the {Integ. unit mode}
is displayed.
4) On the «Integ. unit mode failure diag» display
screen, select the {Clear Memory} and press the
[YES] key.
5) When the ‘Done’ are shown on the display
screen, turn the Subaru Select Monitor and ignition
switch to OFF.
NOTE:
For detailed operation procedure, refer to the SUB-
ARU SELECT MONITOR OPERATION MANUAL.

IM(diag)-11
IMMOBILIZER (DIAGNOSTICS)
Diagnostics Chart for Immobilizer Indicator Light
8. Diagnostics Chart for Immobilizer Indicator Light
A: INSPECTION
1. CHECK IMMOBILIZER INDICATOR CIRCUIT
WIRING DIAGRAM:
IM-00086
SBF-1
SBF-4
BATTERY
COMBINATION METER
BODY INTEGRATED UNIT
i10
R98
i53
F/B No.7
F/B No.12
IGNITION
SWITCH
A33
C2 B7 C9 C8
A17
A2
E
A:
A1
13
A1
M/B No.8
SBF-9
B22
i84
A:
B280
B:
B281
C:
567
8
21
9
4
3
10
2422 23 25
11 12 13 14 15
26 27 28
16 17 18 19
20 21
B281
i84
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
24 25 26 27 28 29 30 31 32 33 34 35
5467
8
21
9
3
10
22 23
11 12 13 14 15
24 25 26 27
16 17 18
28 29
19 20
21 30
B280
i10
2134 6 7 8 9 10
222120191817161514131211
5
123 8
9
10
4
11 12 13 14 15 16
567
17 18
i53
A:
C:B:
A:
RHD
LHD
11
R167
i102
: LHD MODEL
: RHD MODEL
LHD
RHD
i102
LHD
RHD
IMMOBILIZER
INDICATOR
LIGHT

IM(diag)-12
IMMOBILIZER (DIAGNOSTICS)
Diagnostics Chart for Immobilizer Indicator Light
Step Check Yes No
1 CHECK IMMOBILIZER WARNING LIGHT.
1) Turn the ignition switch to OFF.
2) Disconnect the harness connector from
body integrated unit.
3) Connect the resistor (100 Ω) between body
integrated unit harness connector terminal
(i84) No. 33 and chassis ground.
Does the immobilizer indicator
light illuminate? Go to step 2. Go to step 5.
2 CHECKBODY INTEGRATEDUNIT GROUND
CIRCUIT.
Measure the resistance between body inte-
grated unit harness connector terminal and
chassis ground.
Connector & terminal
(B280) No. 22 — Chassis ground:
(B281) No. 8, No. 9 — Chassis ground:
Is the resistance less than 10
Ω?Go to step 3. Repair the open circuit of body inte-
grated unit ground
circuit.
3 CHECK BODY INTEGRATED UNITIGNITION
CIRCUIT.
1) Turn the ignition switch to ON. (engine
OFF)
2) Measure the voltage between body inte-
grated unit harness connector terminal and
chassis ground.
Connector & terminal
(i84) No. 1 (+) — Chassis ground (
− ):
Is the voltage more than 10 V? Go to step 4. Checktheharness
for open or short
circuit between
body integrated
unit and ignition
switch.
4 CHECK BODY INTEGRATED UNIT POWER
SUPPLY CIRCUIT.
1) Turn the ignition switch to OFF.
2) Measure the voltage between body inte-
grated unit harness connector terminal and
chassis ground.
Connector & terminal
(B280) No. 7 (+) — Chassis ground (
− ):
(B281) No. 2 (+) — Chassis ground (
− ):
Is the voltage more than 10 V? Replace the body
integrated unit
<Ref. to SL-46,
Body Integrated
Unit.> and replace
the all ignition keys
(including tran-
sponder). Execute
the registration
procedure next.
Refer to “REGIS-
TRATION MAN-
UAL FOR
IMMOBILIZER”.
Checktheharness
for open or short
circuit between
body integrated
unit and fuse.
5 CHECK COMBINATION METER CIRCUIT.
1) Remove the combination meter. <Ref. to
IDI-16, Combination Meter Assembly.>
2) Measure the voltage between the combina-
tion meter harness connector terminal and
chassis ground.
Connector & terminal
(i10) No. 1, No. 2 (+) — Chassis ground (
− ):
Is the voltage more than 10 V? Go to step 6. Checktheharness
for open or short
circuit between
combination meter
and fuse.
6 CHECK COMBINATION METER CIRCUIT.
Measure the resistance between body inte-
grated unit harness connector terminal and
combination meter harness connector termi-
nal.
Connector & terminal
(i84) No. 33 — (i10) No. 17:
Is the resistance less than 10
Ω?LED bulb malfunc- tion. Replace the
combination meter
case assembly.
<Ref. to IDI-17,
DISASSEMBLY,
Combination
Meter Assembly.>
Repair the har-
ness/connector.

IM(diag)-13
IMMOBILIZER (DIAGNOSTICS)
Diagnostics Chart for Immobilizer Indicator Light
2. CHECK KEY SWITCH CIRCUIT
WIRING DIAGRAM:
IM-00078
B350
KEY WARNING
SWITCH
B281
BODY INTEGRATED UNIT
BATTERY
M/B No.14
C7 3
4
C:
567
8
21
9
4
3
10
2422 23 25
11 12 13 14 15
26 27 28
16 17 18 19
20 21
B281C:
B350
1234

IM(diag)-14
IMMOBILIZER (DIAGNOSTICS)
Diagnostics Chart for Immobilizer Indicator Light
Step Check Yes No
1 CHECK POWER SUPPLY CIRCUIT.
1) Disconnect theharness connector fromkey
warning switch.
2) Turn the ignition switch to “ACC” or “LOCK”
(with key inserted).
3) Measure the voltage between key warning
switch harness connector terminal and chassis
ground.
Connector & terminal
(B350) No. 3 (+) — Chassis ground (
− ):
Is the voltage more than 10 V? Go to step 2. Checktheharness
for open or short
circuit between
keywarningswitch
and fuse.
2 CHECK KEY WARNING SWITCH.
1) Insert the ignition key to ignition switch.
(OFF or ACC)
2) Measure the resistance between key warn-
ing switch terminals.
Connector & terminal
No. 3 — No. 4:
Is the resistance less than 1
Ω?Go to step 3. Replace the key warning switch.
3 CHECK KEY WARNING SWITCH.
1) Remove the ignition key from ignition
switch.
2) Measure the resistance between key warn-
ing switch terminals.
Connector & terminal
No. 3 — No. 4:
Is the resistance more than 1
MΩ?Go to step 4. Replace the key warning switch.
4 CHECK HARNESS BETWEEN KEY WARN-
ING SWITCH AND BODY INTEGRATED
UNIT.
1) Disconnect theharness connector fromkey
warning switch.
2) Disconnect the harness connector from
body integrated unit.
3) Measure the resistance between key warn-
ing switch harness connector terminal and
body integrated unit harness connector termi-
nal.
Connector & terminal
(B350) No. 4 — (B281) No. 7:
Is the resistance less than 10
Ω?Replace the body integrated unit
<Ref. to SL-46,
Body Integrated
Unit.> and replace
the all ignition keys
(including tran-
sponder). Execute
the registration
procedure next.
Refer to “REGIS-
TRATION MAN-
UAL FOR
IMMOBILIZER”.
Repair the har-
ness between key
warning switch
and body inte-
grated unit.

IM(diag)-15
IMMOBILIZER (DIAGNOSTICS)
List of Diagnostic Trouble Code (DTC)
9. List of Diagnostic Trouble Code (DTC)
A: LIST
1. ECM
NOTE:
Perform the engine DTC when the DTC except for immobilizer DTC is detected.
<Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trouble Code (DTC).> <Ref. to EN(H4SO 2.5)(diag)-70,
List of Diagnostic Trouble Code (DTC).> <Ref. to EN(H4DOTC)(diag)-55, List of Diagnostic Trouble Code
(DTC).> <Ref. to EN(H6DO)(diag)-66, List of Diagnostic Trouble Code (DTC).>
DTC Item Contents of diagnosis Index No.
P0513 Incorrect Immobilizer Key Incorrect immobilizer key (Use of unregistered key in body integrated
unit)
<Ref. to IM(diag)-17, DTC P0513 INCOR-
RECT IMMOBILIZER KEY, Diagnostic Pro-
cedure with Diagnostic Trouble Code
(DTC).>
P1570 ANTENNA Faulty antenna <Ref. to IM(diag)-18, DTC P1570 ANTENNA, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
P1571 Reference Code Incompatibility Reference code incompatibility between body integrated unit and
ECM
<Ref. to IM(diag)-21, DTC P1571 REFER-
ENCE CODE INCOMPATIBILITY, Diagnos-
tic Procedure with Diagnostic Trouble Code
(DTC).>
P1572 EGI — Immobilizer Communi- cation
(Except Antenna Circuit)
Communication failure between
body integrated unit and ECM
<Ref. to IM(diag)-22, DTC P1572 IMM CIR-
CUIT FAILURE (EXCEPT ANTENNA CIR-
CUIT), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P1574 Key — Immobilizer Communica-
tion Failure of body integrated unit to ver- ify key (transponder) ID code
<Ref. to IM(diag)-25, DTC P1574 KEY COM-
MUNICATION FAILURE, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
P1576 EGI Control Module EEPROM ECM malfunctioning
<Ref. to IM(diag)-25, DTC P1576 EGI CON-
TROL MODULE EEPROM, Diagnostic Pro-
cedure with Diagnostic Trouble Code
(DTC).>
P1577 IMM Control Module EEPROM Body integrated unit malfunctioning
<Ref. to IM(diag)-25, DTC P1577 IMM CON-
TROL MODULE EEPROM, Diagnostic Pro-
cedure with Diagnostic Trouble Code
(DTC).>
P1578 Meter malfunctioning Reference code incompatibility between body integrated unit and
combination meter
<Ref. to IM(diag)-26, DTC P1578 METER
FAILURE, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

IM(diag)-16
IMMOBILIZER (DIAGNOSTICS)
List of Diagnostic Trouble Code (DTC)
2. BODY INTEGRATED UNIT
NOTE:
• Immobilizer system of 2.5 L EC, EK model and 3.0 L model perform the starter relay control. When the
body integrated unit detect the inconformity of reference code, immediately out put the starter relay cut signal
to ECM, and then ECM stop the starter relay operation. In this case, engine does not start, and DTC is not
recorded in ECM. Check that the engine does not start on the DTC of body integrated unit.
• DTC B0402 isrecordedas freeze frame datawhen theignition switchis turned to OFF. Whentrying to start
the engine with unregistered immobilizer key, DTC is not displayed on Subaru Select Monitor immediately.
Turn the ignition switch to OFF once and turn to ON again before checking DTC. At this time (when turning
the ignition switch to ON again), be careful that the DTC is displayed as freeze frame data even with the reg-
istered immobilizer key.
DTC Item Contents of diagnosis Index No. Relation between ECM and
DTC
B0401 M collation NG Reference code incompatibil- ity between body integrated
unit and combination meter
<Ref. to IM(diag)-26, DTC
P1578 METER FAILURE, Diag-
nostic Procedure with Diagnos-
tic Trouble Code (DTC).>
P1578
B0402 Immobilizer Key colla-
tion NG
• Incorrect immobilizer key
(Use of unregistered key in
body integrated unit)
• Faulty antenna
<Ref. to IM(diag)-17, DTC
P0513 INCORRECT IMMOBI-
LIZER KEY, Diagnostic Proce-
dure with Diagnostic Trouble
Code (DTC).> <Ref. to IM(diag)-
18, DTC P1570 ANTENNA,
Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).> or
<Ref. to IM(diag)-25, DTC
P1574 KEY COMMUNICA-
TION FAILURE, Diagnostic Pro-
cedure with Diagnostic Trouble
Code (DTC).>
• P0513
• P1570
• P1574
B0403 E/G request NG Communication failure between body integrated unit
and ECM
<Ref. to IM(diag)-22, DTC
P1572 IMM CIRCUIT FAILURE
(EXCEPT ANTENNA CIR-
CUIT), Diagnostic Procedure
with Diagnostic Trouble Code
(DTC).>
P1572

IM(diag)-17
IMMOBILIZER (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
10.Diagnostic Procedure with Diagnostic Trouble Code (DTC)
A: DTC P0513 INCORRECT IMMOBILIZER KEY
DTC DETECTING CONDITION:
Incorrect immobilizer key (Use of unregistered key in body integrated unit)
Step Check Yes No
1 PERFORM TEACHING OPERATION ON IG-
NITION KEY.
Perform teaching operation on all keys of the
vehicle. Refer to “REGISTRATION MANUAL
FOR IMMOBILIZER”.
Is the teaching operation for all
keys completed? END. Replace the igni- tion keys (includ-
ing transponder)
which cannot be
registered. Go to
step 2.
2 PERFORM TEACHING OPERATION ON IG-
NITION KEY.
Perform teaching operation on all keys of the
vehicle. Refer to “REGISTRATION MANUAL
FOR IMMOBILIZER”.
Is the teaching operation for all
keys completed? END. Replace the body integrated unit
<Ref. to SL-46,
Body Integrated
Unit.> and replace
alltheignitionkeys
(including tran-
sponder). Execute
the registration
procedure next.
Refer to “REGIS-
TRATION MAN-
UAL FOR
IMMOBILIZER”.

IM(diag)-18
IMMOBILIZER (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
B: DTC P1570 ANTENNA
DTC DETECTING CONDITION:
Faulty antenna
WIRING DIAGRAM:
IM-00079
C20 C21
ANTENNA
B351
1 2
2
1
B281
BODY INTEGRATED UNIT
C:
B351
567
8
21
9
4
3
10
2422 23 25
11 12 13 14 15
26 27 28
16 17 18 19
20 21
B281C: