Subaru Legacy (2005 year). Manual - part 1055

WI-13

WIRING SYSTEM

Basic Diagnostic Procedure

F: ABBREVIATION IN WIRING DIA-

GRAMS

Abbr.

Full name

ABS

Antilock Brake System

ACC

Accessory

A/C

Air conditioner

AD

Auto Down

AT

Automatic transmission

AU

Auto Up

A/B

Airbag

A/F

Air/Fuel (Air fuel ratio sensor)

ATF

Automatic transmission fluid

AWD

All Wheel Drive

B, BAT

Battery

CPC

Canister Purge Control

D

Drive Range

DN

Down

E

Ground

ELR

Emergency Locking Retractor

F/B

Fuse & Relay box

FL1.5

Fusible Link 1.5 mm

2

H/L

Headlight

I/F

Interface

IG

Ignition

Illumi.

Illumination

INT

Intermittent

LH

Left Hand

Lo

Low

M

Motor

M/B

Main fuse box

MG

Magnet

Mi

Middle

MT

Manual transmission

N

Neutral Range

OCV

Oil flow control solenoid valve

OP

Optional Parts or Open

P

Parking Range

PASS

Passing

R

Reverse Range

RH

Right Hand

SBF

Slow Blow Fuse

ST

Starter

SW

Switch

TGV

Tumble generated valve

U, UP

Up

VDC

Vehicle Dynamics Control

VVL

Variable Valve Lift

WASH

Washer

WI-14

WIRING SYSTEM

Working Precautions

2. Working Precautions

A: PRECAUTIONS WHEN WORKING 

WITH THE PARTS MOUNTED ON 
THE VEHICLE

1) When working under a vehicle which is jacked-
up, always be sure to use rigid rack.
2) The parking brake must always be applied dur-
ing working. Also, in automatic transmission vehi-
cles, keep the select lever set to the P (Parking)
range.
3) Be sure the workshop is properly ventilated
when running the engine. Further, be careful not to
touch the belt or fan while the engine is operating.
4) Be careful not to touch hot metal parts, especial-
ly the radiator and exhaust system immediately af-
ter the engine has been turned off.

B: PRECAUTIONS IN TROUBLE DI-

AGNOSIS AND REPAIR OF ELEC-
TRIC PARTS

1) The battery cable must be disconnected from
the battery’s (

−) terminal, and the ignition switch

must be set to the OFF position, unless otherwise
required by the diagnostics.
2) Securely fasten the wiring harness with clamps
and slips so that the harness does not interfere with
the body end parts or edges and bolts or screws.
3) When installing parts, be careful not to catch
them on the wiring harness.
4) When disconnecting a connector, do not pull the
wires, but pull while holding the connector body.

5) Some connectors are provided with a lock. One
type of such a connector is disconnected by push-
ing the lock, and the other, by moving the lock up.
In either type the lock shape must be identified be-
fore attempting to disconnect the connector.

To connect, insert the connector until it snaps and
confirm that it is tightly connected.

6) When checking continuity between connector
terminals, or measuring voltage across the terminal
and ground, always contact tester probe(s) on ter-
minals from the wiring connection side. If the probe
is too thick to gain access to the terminal, use “mini”
test leads.
To check water-proof connectors (which are not
measurable from the wiring side), contact test
probes on the terminal side. Be careful not to bend
or damage the terminals.

7) Sensors, relays, electrical unit, etc., are sensi-
tive to strong impacts.
Handle them with care so that they are not dropped
or mishandled.

WI-02757

WI-02758

Example

LIFT

LIFT

PUSH

PUSH

PUSH

WI-02759

Tester probes

"Mini" test leads

WI-15

WIRING SYSTEM

Power Supply Circuit

3. Power Supply Circuit

A: WIRING DIAGRAM

1. LHD MODEL

P-SUP(L)-01

P-SUP(L)-01

WI-06861

MAIN FUSE BOX (M/B)

FUSE & RELAY BOX (F/B)

H/L

RELAY

RH

MAIN

FAN

RELAY-1

MAIN

SBF

H/L

RELAY

LH

NO. 8

NO. 11

NO. 12

NO. 13

NO. 14

NO. 15

NO. 16

NO. 27

NO. 28

NO. 29

NO. 30

NO. 31

NO. 32

NO. 33

NO. 20

NO. 21

NO. 22

NO. 23

NO. 24

NO. 25

NO. 26

NO. 13

NO. 14

NO. 15

NO. 16

NO. 17

NO. 18

NO. 19

NO. 6

NO. 7

NO. 8

NO. 9

NO. 10

NO. 11

NO. 12

NO. 1

NO. 2

NO. 3

NO. 4

NO. 5

NO. 9

NO. 10

NO. 3

NO. 4

NO. 1

NO. 2

NO. 5

NO. 6

NO. 7

SBF-8

SBF-6

SBF-2

SBF-3

SBF-4

SBF-7

SBF-5

SBF-1

HORN

RELAY

R.DEF

RELAY

TAIL

RELAY

WI-16

WIRING SYSTEM

Power Supply Circuit

P-SUP(L)-02

P-SUP(L)-02

WI-06862

P-SUP(L)-05

B

P-SUP(L)-05

A

P-SUP(L)-03

C

P-SUP(L)-04

I

P-SUP(L)-04

H

P-SUP(L)-03

D

P-SUP(L)-05

G

P-SUP(L)-05

F

P-SUP(L)-04

E

W

W

F26

B145

G:

1 2 3

B186

H:

(BROWN)

B144

D:

(BLUE)

F35

C:

A:

1

2 3

4 5 6 7 8

1 2

3 4 5

6 7 8 9 10 11 12

F37

1 2

3

4 5

6

7

1
5

7

6

2

8

3

4
9

1 2 3 4

5 6 7 8 9

10 11 12 13 14

15 16 17 18 19 20

B: B143

1 2 3 4

5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

F36

E:

(BROWN)

(GREEN)

H4

H4

WR

BR

BW

2
1

BR

3

B1

B7

C10

GENERATOR

MAIN FUSE BOX (M/B)

BATTERY

MB-2

MB-10

F26

MB-4

MB-29

MB-1

MB-9

MB-8

MB-7

MB-6

A7

A9

A19

NO. 4 25A

MAIN

SBF 120A

NO. 2 25A

NO. 8 20A

NO. 3 25A

NO. 5 20A

NO. 1 30A

NO. 16 7.5A

NO. 10 25A

SBF-1 50A

SBF-8 50A

SBF-6 50A

SBF-3 50A

SBF-2 50A

LR

E5

E6

RL

G7

H8

GOr

GB

W

H4

B19

ALT-2

ALT-1

MAIN FAN 

RELAY 1

REAR DEFOGGER RELAY

F37

A:

B143

B:

F35

C:

B144

D:

F36

E:

B145

G:

B186

H:

LR

D9

GD

3

WD

2

RD

6

RW

E3

D1

RY

D5

WR

D7

WB

B11

LD

8

MB-5

WR

RL

VG

H4

H4

1

*

H6

H6

: 6-CYLINDER ENGINE MODEL

: 4-CYLINDER ENGINE MODEL

: 4-CYLINDER ENGINE MODEL
: 6-CYLINDER ENGINE MODEL

1

*

H6

H4

: YG
: LW

OTHER CURRENT 

BATTERY CURRENT

CURRENT FROM IGNITION
SWITCH “IG” TERMINAL

CURRENT FROM IGNITION
SWITCH “ACC” TERMINAL