Subaru Legacy IV (2008 year). Service manual - part 1046

SB-22

Rear Seat Belt

SEAT BELT SYSTEM

LI-2

General Description

LIGHTING SYSTEM

1. General Description

A: SPECIFICATION

B: CAUTION

• Before removing or installing parts, always disconnect the battery ground cable from battery. When replac-
ing the audio, control module and other parts provided with memory functions, record the memory contents
before disconnecting the battery ground cable. Otherwise, the memory is cleared.
• Reassemble the parts in the reverse order of disassembly procedure unless otherwise indicated.
• Adjust parts to the given specifications.
• Connect the connectors securely during reassembly.
• After reassembly, make sure functional parts operate smoothly.
• The airbag system wiring harness is routed near electrical parts and switches. Airbag system wiring har-
nesses and connectors are yellow. Do not use the electrical test equipment on these circuits.
• Be careful not to damage the airbag system wiring harness when servicing electrical parts and switches.

C: PREPARATION TOOL

1. GENERAL TOOL

Headlight

Halogen type low beam

12 V — 55 W

Halogen type high beam

12 V — 60 W

Front turn signal, parking, front side marker light

12 V — 27/8 W

Front fog light

12 V — 55 W

Side turn signal light

12 V — 2.7 W (LED)

Rear combination light

Stop/tail light

12 V — 21/5 W

Turn signal light

12 V — 21 W

Wagon

Rear side marker light

12 V — 5 W

Back-up light

Sedan

12 V — 16 W

Wagon

12 V — 16 W

License plate light

12 V — 5 W

High-mounted stop light

Sedan

12 V — 21 W

Wagon

12 V — 1.3 W (LED)

Room light

12 V — 8 W

Spot map light

12 V — 8 W

Luggage room light

12 V — 13 W

Trunk room light

12 V — 5 W

Glove box light

12 V — 1.4 W

Door step light

12 V — 3 W

TOOL NAME

REMARKS

Circuit tester

Used for measuring resistance and voltage.

LI-3

Headlight and Tail Light System

LIGHTING SYSTEM

2. Headlight and Tail Light 

System

A: WIRING DIAGRAM

1. HALOGEN TYPE HEADLIGHT

<Ref. to WI-128, WIRING DIAGRAM, Headlight
System.>

2. CLEARANCE LIGHT AND ILLUMINATION 
LIGHT

<Ref. to WI-134, WIRING DIAGRAM, Clearance
Light and Illumination Light System.>

B: INSPECTION

1. HEADLIGHT SWITCH

Measure the resistance between headlight switch
terminals.
<Ref. to LI-11, INSPECTION, Combination Switch
(Light).>

2. HEADLIGHT RELAY

Measure the headlight relay resistance between
terminals when connecting terminal No. 4 to the
battery positive terminal and terminal No. 3 to the
battery ground terminal.

3. TAIL AND ILLUMINATION RELAY

Measure the resistance between the tail and illumi-
nation relay terminals when connecting terminal
No. 4 to the battery positive terminal and terminal
No. 3 to the battery ground terminal.

Continuity

Terminal No.

Standard

Yes

1 and 2

Less than 1 

:

No

1 M

: or more

LI-00001

(1)

(2)

(1)

(4)

(2)

(3)

(3)

(4)

Continuity

Terminal No.

Standard

Yes

1 and 2

Less than 1 

:

No

1 M

: or more

LI-00001

(1)

(2)

(1)

(4)

(2)

(3)

(3)

(4)

LI-4

Day Time Running Light System

LIGHTING SYSTEM

3. Day Time Running Light System

A: WIRING DIAGRAM

<Ref. to WI-128, WIRING DIAGRAM, Headlight System.>

B: INSPECTION

1. DAYTIME RUNNING LIGHT MODULE CHECK

Step

Check

Yes

No

1

CHECK POWER SUPPLY CIRCUIT.
1) Turn the ignition switch to ON.
2) Measure the voltage between the daytime 
running light module terminal and chassis 
ground.

Connector & terminal

(B96) No. 2 (+) — Chassis ground (–):
(B242) No. 6 (+) — Chassis ground (–):

Is the voltage battery voltage?

Go to step 2.

Check the fuse and 
the power supply 
circuit.

2

CHECK GROUND CIRCUIT.
1) Disconnect the daytime running light mod-
ule connector.
2) Measure the resistance between the day-
time running light module connector and chas-
sis ground.

Connector & terminal

(B242) No. 10 (+) — Chassis ground (–):

Is the resistance less than 1 

:? Go to step 3.

Check the ground 
circuit.

3

CHECK THE PARKING SIGNAL.
1) Connect the daytime running light module 
connector.
2) Measure the voltage between the terminal 
and chassis ground when pulling parking brake 
lever and releasing.

Connector & terminal

(B96) No. 4 (+) — Chassis ground (–):

Does the voltage change to 0

œ

battery voltage?

Go to step 4.

Check the parking 
brake switch cir-
cuit.

4

CHECK THE STARTER SIGNAL.
Turn the ignition switch to ON 

œ Starter and 

measure the voltage of terminal.

Connector & terminal

(B96) No. 7 (+) — Chassis ground (–):

Does the voltage change to 0

œ

battery voltage?

Go to step 5.

Check the starter 
switch circuit.

5

CHECK THE HEADLIGHT SWITCH SIGNAL.
Turn the headlight switch to LO 

œ OFF and 

measure the voltage of terminal.

Connector & terminal

(B242) No. 2 (+) — Chassis ground (–):

Does the voltage change to 0

œ

battery voltage?

Go to step 6.

Check the combi-
nation switch and 
the headlight LO 
circuit.

6

CHECK THE HEADLIGHT SWITCH SIGNAL.
Turn the headlight switch to HI 

œ OFF and 

measure the voltage of terminal.

Connector & terminal

(B96) No. 1 (+) — Chassis ground (–):

Does the voltage change to 0

œ

battery voltage?

Go to step 7.

Check the combi-
nation switch and 
the headlight HI 
circuit.

7

CHECK THE HEADLIGHT SIGNAL.
1) Turn the ignition switch to ON.
2) Turn the headlight from HI to ON/OFF and 
measure the voltage of terminal.

Connector & terminal

(B242) No. 5 (+) — Chassis ground (–):

Does the voltage change to 0

œ

battery voltage?

Go to step 8.

Check the head-
light HI circuit.

8

CHECK THE HEADLIGHT SIGNAL.
1) Turn the ignition switch to ON.
2) Measure the voltage of terminal on passing 
of headlight.

Connector & terminal

(B96) No. 3 (+) — Chassis ground (–):

Does the voltage change to 0

œ

battery voltage?

If the above test is 
OK, replace the 
daytime running 
light module.

Check the head-
light HI circuit.