Subaru Legacy IV (2008 year). Manual - part 1112

SL-21

Keyless Entry System

SECURITY AND LOCKS

7. CHECK ROOM LIGHT OPERATION

Step

Check

Yes

No

1

CHECK ROOM LIGHT OPERATION.
Make sure the room light illuminates when the 
room light switch is ON, and goes off when the 
switch is OFF.

Does the room light illuminate 
or go off?

Go to step 2.

Check the harness 
between the fuse 
and main fuse box 
and room light.

2

CHECK ROOM LIGHT OPERATION.
1) Turn the room light switch to the “DOOR” 
position.
2) Open/close any door (other than trunk).

Does the room light illuminate 
œ go off (including off delay) 
when the door is opened and 
closed?

Go to step 3.

Check the room 
light circuit. <Ref. 
to LI-33, Room 
Light.>

3

CHECK HARNESS.
1) Disconnect the body integrated unit harness 
connector and room light harness connector.
2) Measure the resistance between the body 
integrated unit harness connector terminal and 
room light harness connector terminal.

Connector & terminal

(B280) No. 3 — (R52) No. 2:

Is the resistance less than 10 

:? Go to step 4.

Repair or replace 
the harness.

4

CHECK HARNESS.
Measure the voltage between room light har-
ness connector terminal and chassis ground.

Connector & terminal

(R52) No. 3 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Go to step 5.

Repair or replace 
the harness.

5

CHECK KEYLESS ENTRY OPERATION.
Press the LOCK/UNLOCK button of the keyless 
transmitter.

Is operation normal?

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

Check the bulb or 
room light assem-
bly, and replace if 
necessary.

SL-22

Keyless Entry System

SECURITY AND LOCKS

8. CHECK HAZARD LIGHT OPERATION

Step

Check

Yes

No

1

CHECK HAZARD LIGHT OPERATION.
Make sure the hazard light blinks when hazard 
switch is turned to ON.

Does the hazard light blink?

Go to step 2.

Check the hazard 
light circuit. <Ref. 
to LI-7, Turn Signal 
Light and Hazard 
Light System.>

2

CHECK OUTPUT TO HAZARD LIGHT.
1) Turn the ignition switch to OFF.
2) Disconnect the key warning switch harness 
connector.
3) Prepare the Subaru Select Monitor kit.
4) Turn the ignition switch to ON (engine OFF) 
and run the “PC application for Subaru Select 
Monitor”.
5) On the «System Selection Menu» display, 
select the {Integ. unit mode}.
6) Select {ECM customizing}.
7) Check {Hazard answer-back setup}, and 
then switch to ON setting if necessary.
8) Select the {Current Data Display & Save}.
9) Remove the key from ignition switch.
10) When operate the LOCK/UNLOCK button 
of transmitter, check the hazard output signal of 
body integrated unit.

Is output signal is present when 
operating the transmitter 
LOCK/UNLOCK button?

Go to step 3.

Check the body 
integrated unit. 
<Ref. to 
LAN(diag)-2, Basic 
Diagnostic Proce-
dure.>

3

CHECK CIRCUIT OF HAZARD LIGHT.
1) Disconnect the harness connector of body 
integrated unit.
2) Disconnect the turn signal and hazard unit 
harness connector.
3) Measure the resistance between harness 
connector terminals.

Connector & terminal

(B280) No. 12 — (B32) No. 8:

Is the resistance less than 10 

:? Check the body 

integrated unit. 
<Ref. to 
LAN(diag)-2, Basic 
Diagnostic Proce-
dure.>

Repair or replace 
the harness.

SL-23

Keyless Entry System

SECURITY AND LOCKS

9. CHECK TRUNK LID LOCK ACTUATOR

10.CHECK DOOR LOCK SWITCH

Refer to the door lock switch inspection of the door lock control system. <Ref. to SL-8, CHECK DOOR LOCK
SWITCH, INSPECTION, Door Lock Control System.>

Step

Check

Yes

No

1

CHECK TRUNK LID LOCK ACTUATOR.
1) Turn the ignition switch to OFF.
2) Disconnect the key warning switch harness 
connector.
3) Prepare the Subaru Select Monitor kit.
4) Turn the ignition switch to ON (engine OFF) 
and run the “PC application for Subaru Select 
Monitor”.
5) On the «System Selection Menu» display, 
select the {Integ. unit mode}.
6) Select the {Current Data Display & Save}.
7) When operating the TRUNK button of the 
transmitter, check the trunk unlock output signal 
of the body integrated unit.

Is the display change to OFF 

œ

ON, when the transmitter 
TRUNK button is operated?

Go to step 2.

Check the body 
integrated unit. 
<Ref. to 
LAN(diag)-2, Basic 
Diagnostic Proce-
dure.>

2

CHECK CIRCUIT OF TRUNK LID LOCK AC-
TUATOR.
1) Disconnect the harness connector of body 
integrated unit.
2) Disconnect the trunk lid lock actuator har-
ness connector.
3) Measure the resistance between harness 
connectors.

Connector & terminal

(i84) No. 22 — (R186) No. 2:

Is the resistance less than 10 

:? Go to step 3.

Repair or replace 
the harness.

3

CHECK GROUND CIRCUIT OF TRUNK LID 
LOCK ACTUATOR.
Measure the resistance between trunk lid lock 
actuator harness connector terminal and chas-
sis ground.

Connector & terminal

(R186) No. 1 — Chassis ground:

Is the resistance less than 10 

:? Go to step 4.

Repair or replace 
the harness.

4

CHECK TRUNK LID LOCK ACTUATOR.
Check the trunk lid lock actuator. <Ref. to SL-
44, Trunk Lid Lock Assembly.>

Is trunk lid lock actuator nor-
mal?

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

Replace the trunk 
lid lock assembly.

SL-24

Keyless Entry System

SECURITY AND LOCKS

11.CHECK IGNITION SWITCH ILLUMINATION

12.CHECK HORN OPERATION

Step

Check

Yes

No

1

CHECK FUSE.
Remove and visually check the fuse No. 14 (in 
the main fuse box).

Is the fuse blown out?

Replace the fuse 
with a new part.

Go to step 2.

2

CHECK POWER SUPPLY.
1) Disconnect the ignition switch illumination 
harness connector.
2) Measure the voltage between harness con-
nector terminal and chassis ground.

Connector & terminal

(B224) No. 2 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Go to step 3.

Check the harness 
for open circuits 
and shorts 
between the igni-
tion switch illumi-
nation and fuse.

3

CHECK IGNITION SWITCH ILLUMINATION 
CIRCUIT.
1) Disconnect the harness connector of body 
integrated unit.
2) Measure the resistance between body inte-
grated unit harness connector terminal and 
ignition switch illumination harness connector 
terminal.

Connector & terminal

(B280) No. 4 — (B224) No. 1:

Is the resistance less than 10 

:? Go to step 4.

Check the harness 
for open circuits 
and shorts 
between the body 
integrated unit and 
ignition switch illu-
mination.

4

CHECK IGNITION SWITCH ILLUMINATION 
BULB.
1) Remove the ignition switch illumination bulb.
2) Connect the battery (+) terminal and (–) ter-
minal to the illumination bulb.

Does the bulb illuminate?

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

Replace the igni-
tion switch illumi-
nation bulb with a 
new part.

Step

Check

Yes

No

1

CHECK HORN OPERATION.
Make sure the horn sounds when the horn 
switch is pushed.

Does the horn sound?

Go to step 2.

Check the horn cir-
cuit. <Ref. to COM-
2, General 
Description.>

2

CHECK HORN OPERATION.
1) Disconnect the harness connector of body 
integrated unit.
2) Connect the harness connector terminal to 
ground using a suitable lead wire.

Connector & terminal

(B280) No. 11 (+) — Chassis ground (–):

Does the horn sound?

Check the body 
integrated unit. 
<Ref. to 
LAN(diag)-2, Basic 
Diagnostic Proce-
dure.>

Check the harness 
for open circuits 
and/or shorts 
between the body 
integrated unit and 
horn relay.