Subaru Legacy III (2000-2003 year). Manual - part 151

EN(H4SO)-216

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

AU:DTC P0483 — COOLING FAN RATIONALITY CHECK —

• DTC DETECTING CONDITION:

• Two consecutive driving cycles with fault

• TROUBLE SYMPTOM:

• Occurrence of noise
• Overheating

CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode<Ref. to EN(H4SO)-47, OPER-
ATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO)-40, OPERATION, Inspection 
Mode.> .

NOTE:
If the vehicle, with the engine idling, is placed very close to a wall or another vehicle, preventing normal cool-
ing function, the OBD system may detect malfunction.

EN(H4SO)-217

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

• WIRING DIAGRAM:

EN-00736

2

1

4

3

21

22

24

20

8

7

5

9

20A

20A

SUB FAN

RELAY

AIR CONDITIONING RELAY HOLDER

SUB FAN

MOTOR

MAIN FAN

MOTOR

MAIN FAN

RELAY

F28

F16

F66

F27

1

2

F17

B100

F2

B72

1

2

K9

J10

NO. 3

NO. 18

NO. 17

SBF-4

SBF-1

IGNITION 
SWITCH

B72

(BLUE)

3 4

1 2

1

2

3

4

5 6

7
8

9

10

11 12

13 14

15
16

17
18

19 20

21 22

23
24

25
26

27 28

29

30

B134

1 2

3 4

5 6

7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

24 25

26 27 28 29

30 31 32 33

34 35

F28

F66

F27

BATTERY

14

13

B134

ECM

F2

1

2 3 4

5 6 7

9 10 11 12 13 14 15 16

8

EN(H4SO)-218

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

Step

Value

Yes

No

1

CHECK ANY OTHER DTC ON DISPLAY.
Is any other DTC displayed?

DTC indicated.

Inspect the rele-
vant DTC using 
“List of Diagnostic 
Trouble Code 
(DTC)”. <Ref. to 
EN(H4SO)-83, List 
of Diagnostic 
Trouble Code 
(DTC).>

Check radiator fan 
and fan motor.  
<Ref. to 
CO(H4SO)-28, 
Radiator Main Fan 
and Fan Motor.> 
and  <Ref. to 
CO(H4SO)-30, 
Radiator Sub Fan 
and Fan Motor.>

EN(H4SO)-219

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

MEMO: