Subaru Legacy IV (2008 year). Service manual - part 1113

SL-25

Keyless Entry System

SECURITY AND LOCKS

13.CHECK KEYLESS BUZZER

Step

Check

Yes

No

1

CHECK KEYLESS BUZZER SOUND.
1) Using the Subaru Select Monitor, set the 
keyless buzzer sound to ON.
2) Operate the LOCK/UNLOCK button of the 
transmitter and check whether the keyless 
buzzer sounds or not.

Does the keyless buzzer 
sound?

Keyless buzzer is 
normal.

Go to step 2.

2

CHECK KEYLESS BUZZER GROUND CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the keyless buzzer harness con-
nector.
3) Measure the resistance between keyless 
buzzer harness connector terminal and chassis 
ground.

Connector & terminal

(F102) No. 2 — Chassis ground:

Is the resistance less than 10 

:? Go to step 3.

Repair or replace 
the harness.

3

CHECK KEYLESS BUZZER POWER SUP-
PLY CIRCUIT.
1) Disconnect the harness connector of body 
integrated unit.
2) Measure the resistance between the body 
integrated unit harness connector and keyless 
buzzer harness connector.

Connector & terminal

(i84) No. 6 — (F102) No. 1:

Is the resistance less than 10 

:? Go to step 4.

Repair or replace 
the harness.

4

CHECK KEYLESS BUZZER.
1) Remove the keyless buzzer.
2) Install the keyless buzzer to another vehicle 
which operates keyless buzzer normally, check 
the buzzer sounds.

Does the keyless buzzer 
sound?

Replace the body 
integrated unit. 
<Ref. to SL-56, 
Body Integrated 
Unit.>

Replace the key-
less buzzer.

SL-26

Keyless Entry System

SECURITY AND LOCKS

14.CHECK IGNITION SWITCH

CAUTION:
When the ignition key lock is replaced, all ignition keys also must be registered. (Refer to the “IMMO-
BILIZER TEACHING OPERATION MANUAL”.)

Step

Check

Yes

No

1

CHECK IGNITION SWITCH INPUT.
1) Prepare the Subaru Select Monitor kit.
2) Turn the ignition switch to ON (engine OFF) 
and run the “PC application for Subaru Select 
Monitor”.
3) On the «System Selection Menu» display, 
select the {Integ. unit mode}.
4) Select the {Current Data Display}.
5) Check the following data display.

Is the data display 10 V or more 
(BATT voltage (Control), IG 
power supply voltage)?

Ignition switch is 
normal.

Go to step 2.

2

CHECK IGNITION SWITCH INPUT.
1) Turn the ignition switch to ON.
2) Measure the voltage between the body inte-
grated unit harness connector and chassis 
ground.

Connector & terminal

(i84) No. 1 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Replace the body 
integrated unit. 
<Ref. to SL-56, 
Body Integrated 
Unit.>

Go to step 3.

3

CHECK FUSIBLE LINK.
Remove the fusible link main SBF and SBF-6 
(in main fuse box), and visually check.

Is the fusible link blown out?

Replace the fusible 
link main SBF or 
SBF-6. If the 
replaced fusible 
link has blown out 
easily, repair the 
short circuit 
between the fus-
ible link and the 
ignition switch.

Go to step 4.

4

CHECK FOR POWER SUPPLY OF IGNITION 
SWITCH.
1) Disconnect the ignition switch harness con-
nector.
2) Measure the voltage between harness con-
nector terminal and chassis ground.

Connector & terminal

(B72) No. 3 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Go to step 5.

Check the harness 
for open circuits 
and shorts 
between the igni-
tion switch and fus-
ible link.

5

CHECK IGNITION SWITCH.
1) Insert the ignition key into ignition switch, 
and turn the each position.
2) Measure the resistance between ignition 
switch terminals.

Connector & terminal

No. 3 — No. 5: (ACC position)
No. 3 — No. 5 — No. 1 — No. 4 
(ON position)
No. 3 — No. 1 — No. 4 — No. 2 
(ST position)

Is the resistance less than 1 

:

when turning the ignition key to 
each position?

Ignition switch is 
normal.

Replace the igni-
tion switch. <Ref. 
to SL-49, 
REPLACEMENT, 
Ignition Key Lock.>

SL-27

Security System

SECURITY AND LOCKS

4. Security System

A: WIRING DIAGRAM

For wiring diagrams related to the security system, refer to “Security System” in Section WI. <Ref. to WI-186,
WIRING DIAGRAM, Security System.>

B: ELECTRICAL SPECIFICATION

Refer to the Control Module I/O Signal of the LAN SYSTEM (DIAGNOSTICS). <Ref. to LAN(diag)-9, ELEC-
TRICAL SPECIFICATION, Control Module I/O Signal.>

C: INSPECTION

1. BASIC DIAGNOSTIC PROCEDURE

Step

Check

Yes

No

1

INITIAL CHECK.
Check keyless entry system.

Does the keyless entry system 
operate normally?

Go to step 2.

Check keyless 
entry system. 
<Ref. to SL-14, 
INSPECTION,
Keyless Entry Sys-
tem.>

2

CHECK SECURITY ON/OFF SETTING.
1) Remove the key from ignition switch, and 
then close all doors.
2) Press the UNLOCK button of the keyless 
transmitter.
3) Check the security indicator light blinking 
patterns.

Is the security indicator light 
blinking patterns as follows?
• Model with immobilizer: Blinks 
in every 3 seconds

Go to step 3.

Check the security 
indicator light cir-
cuit. <Ref. to SL-
32, CHECK 
SECURITY INDI-
CATOR LIGHT 
CIRCUIT, 
INSPECTION,
Security System.>

3

CHECK SECURITY ON/OFF SETTING.
1) Press the LOCK button of the transmitter.
2) Check the security indicator light blinking 
patterns.

Is the security indicator light 
blinking patterns as follows?
• When monitoring lag is set to 
0 seconds: Blinks twice within 
0.5 seconds at 2 second inter-
vals.
• When monitoring lag is set to 
30 seconds: Blinks three times 
within 1 second at 0.4 second 
intervals.

Go to step 6.

Go to step 4.

4

CHANGE SETTING OF SECURITY SYSTEM.
Change the setting of security system to ON. 
<Ref. to SL-29, SECURITY SYSTEM ON/OFF 
SETTING, INSPECTION, Security System.>

Is setting change completed 
correctly?

Go to step 5.

• Check the igni-
tion switch circuit. 
<Ref. to SL-33, 
CHECK IGNITION 
SWITCH CIRCUIT, 
INSPECTION,
Security System.>
• Check the door 
lock switch circuit. 
<Ref. to SL-23, 
CHECK DOOR 
LOCK SWITCH, 
INSPECTION,
Keyless Entry Sys-
tem.>

SL-28

Security System

SECURITY AND LOCKS

5

CHECK SETTING CHANGE OF SECURITY 
SYSTEM.
1) Remove the key from ignition switch, and 
then close all doors.
2) Press the LOCK button of the transmitter.
3) Check the security indicator light blinking 
patterns.

Is the security indicator light 
blinking patterns as follows?
• When monitoring lag is set to 
0 seconds: Blinks twice within 
0.5 seconds at 2 second inter-
vals.
• When monitoring lag is set to 
30 seconds: Blinks three times 
within 1 second at 0.4 second 
intervals.

Go to step 6.

Replace the body 
integrated unit. 
<Ref. to SL-56, 
Body Integrated 
Unit.>

6

CHECK SECURITY SYSTEM OPERATION.
Press the LOCK button of keyless transmitter, 
and wait for 30 seconds.

Is the blinking pattern of secu-
rity indicator light blink twice 
within 0.5 seconds in 2 second 
cycles?

Go to step 7.

Replace the body 
integrated unit. 
<Ref. to SL-56, 
Body Integrated 
Unit.>

7

CHECK SECURITY SYSTEM CANCEL OP-
ERATION.
Insert the key to the door key cylinder to unlock.

Is the security indicator light 
blinking patterns as follows?
• Model with immobilizer: Blinks 
in every 3 seconds

Press the LOCK 
button of keyless 
transmitter, and 
wait for 30 sec-
onds. Go to step 8.

Check the door key 
cylinder circuit. 
<Ref. to SL-33, 
CHECK DOOR 
KEY CYLINDER 
SWITCH & CIR-
CUIT, INSPEC-
TION, Security 
System.>

8

CHECK SECURITY ALARM OPERATION.
1) Unlock all doors using the door lock switch 
on driver’s door.
2) Open any door, trunk or rear gate.

Does the security alarm oper-
ate when opening any door, 
trunk or rear gate?

Go to step 9.

• Check the door 
switch. <Ref. to 
SL-30, CHECK 
DOOR SWITCH, 
INSPECTION,
Security System.>
• Check the trunk 
lid switch or rear 
gate latch switch. 
<Ref. to SL-31, 
CHECK TRUNK 
LID SWITCH 
(SEDAN) OR 
REAR GATE 
LATCH SWITCH 
(WAGON), 
INSPECTION,
Security System.>

9

CHECK SECURITY ALARM OPERATION.
Check the security alarm operation.

Does all security alarm oper-
ate?
• Horn sounds
• Hazard light blinks
• Security indicator light illumi-
nates

Go to step 10.

• Check the horn. 
<Ref. to SL-32, 
CHECK HORN, 
INSPECTION,
Security System.>
• Check the haz-
ard light. <Ref. to 
SL-32, CHECK 
HAZARD LIGHT 
OPERATION, 
INSPECTION,
Security System.>

Step

Check

Yes

No