Subaru Legacy III (2000-2003 year). Manual - part 150

EN(H4SO)-212

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

6

CHECK FUEL TANK CORD.
1) Disconnect connector from fuel level sen-

sor.

2) Measure resistance between fuel level sen-

sor and coupling connector.

Connector & terminal

(R57) No. 6 — (R58) No. 3:

Is the measured value less than the speci-
fied value?

1 

Ω

Go to step 7.

Repair open circuit 
between coupling 
connector and fuel 
level sensor.

7

CHECK FUEL TANK CORD.
1) Disconnect connector from fuel sub level 

sensor.

2) Measure resistance between fuel level sen-

sor and fuel sub level sensor.

Connector & terminal

(R58) No. 2 — (R59) No. 2:

Is the measured value less than the speci-
fied value?

1 

Ω

Go to step 8.

Repair open circuit 
between fuel level 
sensor and fuel 
sub level sensor.

8

CHECK FUEL TANK CORD.
Measure resistance between fuel sub level 
sensor and coupling connector.

Connector & terminal

(R57) No. 2 — (R59) No. 1:

Is the measured value less than the specified 
value?

1 

Ω

Go to step 9.

Repair open circuit 
between coupling 
connector and fuel 
sub level sensor.

9

CHECK FUEL LEVEL SENSOR.

Warning:

During work procedures, if fuel tank is more
than 3/4 full, be careful because fuel may
spill.

1) Remove fuel pump assembly. <Ref. to 

FU(H4SO)-62, Fuel Pump.>

2) While moving fuel level sensor float up and 

down, measure resistance between fuel 
level sensor terminals.

Terminals

No. 3 — No. 6:

Does the measured value exceed the spec-
ified value?

54.5 

Ω

Replace fuel level 
sensor. <Ref. to 
FU(H4SO)-64, 
Fuel Level Sen-
sor.>

Go to step 10.

10

CHECK FUEL SUB LEVEL SENSOR.

Warning:

During work procedures, if fuel tank is more
than 3/4 full, be careful because fuel may
spill.

1) Remove fuel sub level sensor. <Ref. to 

FU(H4SO)-65, Fuel Sub Level Sensor.>

2) While moving fuel sub level sensor float up 

and down, measure resistance between 
fuel sub level sensor terminals.

Terminals

No. 1 — No. 2:

Does the measured value exceed the spec-
ified value?

41.5 

Ω

Replace fuel sub 
level sensor.  
<Ref. to 
FU(H4SO)-65, 
Fuel Sub Level 
Sensor.>

Replace combina-
tion meter. <Ref. 
to IDI-14, Combi-
nation Meter 
Assembly.>

Step

Value

Yes

No

EN(H4SO)-213

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

MEMO:

EN(H4SO)-214

ENGINE (DIAGNOSTICS)

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

AT:DTC P0464 — FUEL LEVEL SENSOR CIRCUIT INTERMITTENT—

• DTC DETECTING CONDITION:

• Two consecutive driving cycles with fault

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.> .
• WIRING DIAGRAM:

EN-01132

NO. 5

27

B22

R3

R15

R57

R58

R59

B99

E3

B157

B72

i53

R98

R59

i10

B22

1 2 3 4
5 6 7 8
9 10 11 12

13 14 15 16

1 2

SBF-1

SBF-4

IGNITION 
SWITCH

COMBINATION 
METER

FUEL GAUGE

FUEL PUMP ASSY

FUEL SUB 
METER UNIT

FUEL LEVEL 

SENSOR

FUEL SUB

LEVEL SENSOR

C3

A8

A20

i10

A :

i28

i11

B :

i12

C :

B16

A3

3

6

2

1

16

6
2

B72

4

1 2 3

6

5

1
3 4 5 6

2

R57

i12

1 2 3

4 5 6

7 8 9 10 11 12 13 14

i11

1 2 3 4

5 6 7

8 9 10 11 12 13 14 15 16

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

B99

1 2 3 4

5 6

10 11 12 13 14 15

7

16

23

30

19 20 21

22

26 27 28 29

8

17

24

31

9

18

25

32

B157

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 36

37
38

1

2

9

3

4

5

6

7

8

BATTERY

IGNITION RELAY

B135 ECM

R58

1 2
3 4
5 6

 LHD MODEL : 12
 RHD MODEL : 14

1

*

2

*

3

*

4

*

 LHD MODEL : 29
 RHD MODEL : 6

 LHD MODEL : 30
 RHD MODEL : 17

 LHD MODEL : 9
 RHD MODEL : 38

 LHD MODEL : 13
 RHD MODEL : 36

5

*

6

*

7

*

 LHD MODEL : 11
 RHD MODEL : 34

 LHD MODEL : 10
 RHD MODEL : 37

1

*

2

*

3

*

4

*

5

*

6

*

7

*

5

4

6 7

8

2

1

9

3

10

22

23

11 12 13 14 15

24 25

26 27

16 17 18

28 29

19 20

21

30

B136

R98

:LHD

:RHD

1 2 3

4 5 6

7 8 9 10 11 12 13 14

R98

1 2 3

4 5 6 7

8 9 10 11 12 13 14 15 16

EN(H4SO)-215

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).>

Go to step 2.

2

CHECK FUEL LEVEL SENSOR.

Warning:

During work procedures, if fuel tank is more
than 3/4 full, be careful because fuel may
spill.

1) Remove fuel pump assembly. <Ref. to 

FU(H4SO)-62, Fuel Pump.>

2) While moving fuel level sensor float up and 

down, make sure that the resistance 
between fuel level sensor terminals 
changes smoothly.

Terminals

No. 3 — No. 6:

Does the resistance change smoothly?

Change smoothly.

Go to step 3.

Replace fuel level 
sensor. <Ref. to 
FU(H4SO)-64, 
Fuel Level Sen-
sor.>

3

CHECK FUEL SUB LEVEL SENSOR.

Warning:

During work procedures, if fuel tank is more
than 3/4 full, be careful because fuel may
spill.

1) Remove fuel sub level sensor. <Ref. to 

FU(H4SO)-65, Fuel Sub Level Sensor.>

2) While moving fuel sub level sensor float up 

and down, make sure that the resistance 
between fuel level sensor terminals 
changes smoothly.

Terminals

No. 1 — No. 2:

Does the resistance change smoothly?

Change smoothly.

Repair poor con-
tact in ECM, com-
bination meter and 
coupling connec-
tors.

Replace fuel sub 
level sensor.  
<Ref. to 
FU(H4SO)-65, 
Fuel Sub Level 
Sensor.>