Subaru Legacy IV (2008 year). Manual - part 286

CO(H4DOTC)-6

General Description

COOLING

D: PREPARATION TOOL

1. SPECIAL TOOL

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

499977100

CRANK PULLEY 
WRENCH

Used to stop rotation of the crank pulley when 
loosening or tightening crank pulley bolts. (MT 
model)

499977400

CRANK PULLEY 
WRENCH

Used to stop rotation of the crank pulley when 
loosening or tightening crank pulley bolts. (AT 
model)

499977500

CAM SPROCKET 
WRENCH

Used for removing and installing intake cam 
sprocket.

499207400

CAM SPROCKET 
WRENCH

Used for removing and installing exhaust cam 
sprocket.

ST-499977100

ST-499977400

ST-499977500

ST-499207400

CO(H4DOTC)-7

General Description

COOLING

2. GENERAL TOOL

1B022XU0

SUBARU SELECT 
MONITOR III KIT

Used for troubleshooting the electrical system.

TOOL NAME

REMARKS

Radiator cap tester

Used for checking radiator and radiator cap.

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

ST1B022XU0

CO(H4DOTC)-8

Radiator Fan System

COOLING

2. Radiator Fan System

A: WIRING DIAGRAM

CO-02317

B136

F108

F16

B361

F17

F16

1 2

1
7

B360

1 2 3

4 5 6 7

8 9 10 11 12 13 14 15 16

F108

2 3

8

10

1
9

4

11 12 13 14 15 16

5 6 7

17 18

F27

B136

F36

F35

B143

F17

B361

1
7

2 3

4 5 6

8 9 10 11 12 13 14

F109

3 4

1 2

8 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

5

6 7

F27

1 2 3 4

5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

1 2

3 4 5

6 7 8 9 10 11 12

3

1 2

7

4 5

6

16

7

2

1

22

19

18

11

12

20

21

10

13

E

E

M

1

2

M

F109

B360

10

1

SBF-6

MAIN SBF

No.3

No.22

No.26

18

29

B:

C:

E:

ECM

No.4

BATTERY

5

6

7 8

2

1

9

4

3

10

24

22 23

25

11 12 13 14 15

26 27

28

16

17 18 19 20 21

33 34

29

32

30

31

35

20 21 22

19

18

3 4 5

7

6

10 11

12
13

15

16
17

14

2

1

9

8

E6

E5

C10

B7

MAIN
FUSE BOX

 (M/B)

B143

B:

F35

C:

F36

E:

MAIN FAN 
MOTOR

SUB FAN MOTOR

THROUGH JOINT CONNECTOR

MAIN FAN 
RELAY

 1

 2

MAIN
FAN 
RELAY

SUB
FAN 
RELAY

THROUGH JOINT 
CONNECTOR

RELAY 
HOLDER

IGNITION SWITCH

CO(H4DOTC)-9

Radiator Fan System

COOLING

B: INSPECTION

Operating condition:

Vehicle speed

A/C compressor load

Engine coolant temperature

Increase: 94°C (201°F) 

or less

Decrease: 91°C (196°F) 

or less

Increase: 95 — 96°C 

(203 — 205°F)

Decrease: 92 — 94°C 

(198 — 201°F)

Increase: 97°C (207°F) 

or more

Decrease: 95°C (203°F) 

or more

Radiator fan operation

Radiator fan operation

Radiator fan operation

During acceleration: 

19 km/h (12 MPH) 

or less

During deceleration: 

10 km/h (6 MPH) 

or less

OFF

OFF

Low-Speed

High-Speed

Low

Low-Speed

Low-Speed

High-Speed

High

High-Speed

High-Speed

High-Speed

During acceleration: 

20 — 69 km/h 

(12 — 43 MPH)

During deceleration: 

11 — 64 km/h 

(7 — 40 MPH)

OFF

OFF

Low-Speed

High-Speed

Low

High-Speed

High-Speed

High-Speed

High

High-Speed

High-Speed

High-Speed

During acceleration: 

70 — 105 km/h 

(43 — 65 MPH)

During deceleration: 

65 — 103 km/h 

(40 — 64 MPH)

OFF

OFF

Low-Speed

High-Speed

Low

High-Speed

High-Speed

High-Speed

High

High-Speed

High-Speed

High-Speed

During acceleration: 

106 km/h (66 MPH) 

or more

During deceleration: 

104 km/h (65 MPH) 

or more

OFF

OFF

High-Speed

High-Speed

Low

High-Speed

High-Speed

High-Speed

High

High-Speed

High-Speed

High-Speed