Subaru Legacy III (2000-2003 year). Manual - part 952

IDI-8

INSTRUMENTATION/DRIVER INFO

COMBINATION METER SYSTEM

5. CHECK ENGINE CONTROL MODULE

Step

Value

Yes

No

1

CHECK ENGINE CONTROL MODULE SIG-
NAL.
1) Start the engine.
2) Measure voltage between engine control 

module connector and chassis ground.

Connector & terminal

Standard meter (Without OBD):

(B134) No. 30 (+) — Chassis ground (

−−−−

):

Standard meter (With OBD):

(B134) No. 10 (+) — Chassis ground (

−−−−

):

Luminiscent meter:

(B136) No. 9 (+) — Chassis ground (

−−−−

):

Is the measured value same as the speci-
fied value?

0 

←→

 14 V

Go to step 2.

Check engine con-
trol module. <Ref. 
to EN(H4SO)-2, 
Basic Diagnostic 
Procedure.>or 
<Ref. to 
EN(H4SOw/
oOBD)-2, Basic 
Diagnostic Proce-
dure.>or  <Ref. to 
EN(H4DOSTC)-2, 
Basic Diagnostic 
Proce-
dure.>or<Ref. to 
EN(H6DO)-2, 
Basic Diagnostic 
Procedure.> or 
<Ref. to 
EN(H6DO)-2, 
Basic Diagnostic 
Procedure.>

2

CHECK HARNESS BETWEEN COMBINA-
TION METER AND ENGINE CONTROL MOD-
ULE.
1) Turn ignition switch to OFF.
2) Disconnect connector from engine control 

module and combination meter.

3) Measure resistance between engine con-

trol module harness connector and combi-
nation meter harness connector.

Connector & terminal

Standard meter (Without OBD):

(B134) No. 30 — (i11) No. 7:

Standard meter (With OBD):

(B134) No. 10 — (i11) No. 7:

Luminiscent meter:

(B136) No. 9 — (i11) No. 6:

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

10 

Ω

Check tachometer. 
<Ref. to IDI-19, 
REMOVAL, 
Tachometer.>

Repair wiring har-
ness.

IDI-9

INSTRUMENTATION/DRIVER INFO

COMBINATION METER SYSTEM

6. CHECK FUEL LEVEL SENSOR

Step

Value

Yes

No

1

CHECK FUEL LEVEL SENSOR.
1) Remove the fuel level sensor.  <Ref. to 

FU(H4SO)-64, REMOVAL, Fuel Level Sen-
sor.> or <Ref. to FU(H4SOw/oOBD)-61, 
REMOVAL, Fuel Level Sensor.><Ref. to 
FU(H4DOSTC)-61, REMOVAL, Fuel Level 
Sensor.>or <Ref. to FU(H6DO)-67, 
REMOVAL, Fuel Level Sensor.>

2) Measure the resistance between the fuel 

level sensor terminals when setting the 
float to FULL and EMPTY position.

Terminals

No. 3 — No. 6

Is the measured value within the specified 
range?

FULL: 0.5 — 2.5 

Ω, 

EMPTY: 

52.5 — 54.5 

Ω

Go to step 2.

Replace the fuel 
level sensor.

2

CHECK FUEL SUB LEVEL SENSOR.
1) Remove the fuel sub level sensor.  <Ref. to 

FU(H4SO)-65, REMOVAL, Fuel Sub Level 
Sensor.> or <Ref. to FU(H4SOw/oOBD)-
62, REMOVAL, Fuel Sub Level Sensor.> or 
<Ref. to FU(H4DOSTC)-62, REMOVAL, 
Fuel Sub Level Sensor.> or  <Ref. to 
FU(H6DO)-68, REMOVAL, Fuel Sub Level 
Sensor.>

2) Measure the resistance between the fuel 

sub level sensor terminals when setting the 
float to FULL and EMPTY position.

Terminals

No. 1 — No. 2

Is the measured value within the specified 
range?

FULL: 0.5 — 2.5 

Ω

, EMPTY: 

39.5 — 41.5 

Ω

Go to step 3.

Replace the fuel 
sub level sensor.

3

CHECK HARNESS BETWEEN FUEL SUB 
LEVEL SENSOR AND COMBINATION 
METER.
1) Disconnect the connector from the combi-

nation meter.

2) Measure the resistance between the fuel 

sub level sensor harness connector termi-
nal and combination meter harness con-
nector terminal.

Connector & terminal

Standard meter:

(R59) No. 1 — (i10) No. 3:

Luminiscent (LHD):

(R59) No. 1 — (i11) No. 15:

Luminiscent (RHD):

(R59) No. 1 — (i10) No. 17:

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

10 

Ω

Go to step 4.

Repair wiring har-
ness.

IDI-10

INSTRUMENTATION/DRIVER INFO

COMBINATION METER SYSTEM

4

CHECK HARNESS BETWEEN FUEL LEVEL 
SENSOR AND FUEL SUB LEVEL SENSOR.
Measure the resistance between the fuel level 
sensor harness connector terminal and fuel 
sub level sensor harness connector terminal.

Connector & terminal

(R58) No. 6 — (R59) No. 2:

Is the measured value less than the specified 
value?

10 

Ω

 

Go to step 5.

Repair wiring har-
ness. 

5

CHECK FUEL LEVEL SENSOR GROUND 
CIRCUIT.
Measure the resistance between the fuel level 
sensor harness connector terminal and chas-
sis ground.

Connector & terminal 

(R58) No. 3 — Chassis ground: 

Is the measured value less than the specified 
value?

10 

Ω

Check the fuel 
gauge. <Ref. to 
IDI-20, 
REMOVAL, Fuel 
Gauge.>

Repair wiring har-
ness.

Step

Value

Yes

No

IDI-11

INSTRUMENTATION/DRIVER INFO

COMBINATION METER SYSTEM

7. CHECK ENGINE COOLANT TEMPERATURE SENSOR

Step

Value

Yes

No

1

CHECK ENGINE COOLANT TEMPERATURE 
SENSOR.
Check engine coolant temperature sensor.  
<Ref. to EN(H4SO)-2, Basic Diagnostic Proce-
dure.>, or <Ref. to EN(H4SOw/oOBD)-2, Basic 
Diagnostic Procedure.> or <Ref. to 
EN(H4DOSTC)-2, Basic Diagnostic Proce-
dure.> or  <Ref. to EN(H6DO)-2, Basic Diag-
nostic Procedure.>
Is engine coolant temperature sensor OK?

Engine coolant temperature 
sensor is OK.

Go to step 2.

Replace engine 
coolant tempera-
ture sensor.

2

CHECK HARNESS BETWEEN ENGINE 
COOLANT TEMPERATURE SENSOR AND 
COMBINATION METER.
1) Turn ignition switch to OFF.
2) Disconnect connector from engine coolant 

temperature sensor and combination 
meter.

3) Measure resistance between engine cool-

ant temperature sensor harness connector 
and combination meter harness connector.

Connector & terminal

Standard meter:

(E8) No. 3 — (i12) No. 8:

Luminiscent meter (LHD):

(E8) No. 3 — (i12) No. 5:

Luminiscent meter (RHD):

(E8) No. 3 — (i11) No. 15:

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

10 

Ω

Go to step 3.

Repair wiring har-
ness.

3

CHECK WATER TEMPERATURE GAUGE 
GROUND CIRCUIT.
Measure resistance between combination 
meter harness connector terminal and chassis 
ground.

Connector & terminal

Standard meter:

(i12) No. 9 — Chassis ground:

Luminiscent meter (LHD):

(i12) No. 6 — Chassis ground:

Luminiscent meter (RHD):

(i11) No. 16 — Chassis ground:

Is the measured value less than the specified 
value?

10 

Ω

Check water tem-
perature gauge. 
<Ref. to IDI-21, 
REMOVAL, Water 
Temperature 
Gauge.>

Repair wiring har-
ness.