Page 2337 of 3342
B2M1102
AZ: DTC P0462
—FUEL LEVEL SENSOR CIRCUIT
LOW INPUT—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
WIRING DIAGRAM:
B2M1021
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
486
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles
Page 2338 of 3342
11AZ1CHECK SPEEDOMETER AND TACHOM-
ETER OPERATION IN COMBINATION
METER.
: Does speedometer and tachometer operate
normally?
: Go to step11AZ3.
: Go to step11AZ2.
B6M0121
11AZ2CHECK GROUND CIRCUIT OF COMBINA-
TION METER.
1) Turn ignition switch to OFF.
2) Pull out combination meter from instrument panel.
to 6-2 [W13A1].>
3) Disconnect connector from combination meter.
B2M0934A
4) Measure resistance of harness between combination
meter connector and chassis ground.
: Connector & terminal
(i12) No. 1—Chassis ground:
Is resistance less than 5Ω?
: Repair or replace combination meter.
: Repair harness and connector.
NOTE:
In this case, repair the following:
Open circuit in harness between combination meter con-
nector and grounding terminal
Poor contact in combination meter connector
Poor contact in grounding terminal
487
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11. Diagnostic Chart with Trouble Code for RHD Vehicles
Page 2339 of 3342

H2M1414B
11AZ3CHECK INPUT SIGNAL FOR ECM.
(USING VOLTAGE METER AND SUBARU
SELECT MONITOR.)
1) Turn ignition switch to ON. (Engine OFF)
2) Measure voltage between ECM connector and chassis
ground.
: Connector & terminal
(B84) No. 27 (+)—Chassis ground ( ):
Is the voltage less than 0.12 V?
: Go to step11AZ4.
: Go to next.
H2M1327
: Does the value change less than 0.12 V by
shaking harness and connector of ECM
while monitoring the value with Subaru
Select Monitor?
Subaru Select Monitor
Designate mode using function key.
Function mode: F45
F45: Fuel level sensor output signal is indicated.
: Repair poor contact in ECM connector.
: Even if MIL lights up, the circuit has returned to a
normal condition at this time. A temporary poor
contact of the connector may be the cause.
NOTE:
In this case, repair the following:
Poor contact in fuel pump connector
Poor contact in combination meter connector
Poor contact in ECM connector
Poor contact in coupling connector (i3, B22, B97 and
R57)
488
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G2M0340
11AZ4CHECK HARNESS BETWEEN ECM, COM-
BINATION METER AND FUEL PUMP
CONNECTOR.
1) Turn ignition switch to OFF.
2) Remove fuel pump access hole lid located on the right
rear of luggage compartment floor.
B2M0940A
3) Disconnect connector from fuel pump.
4) Measure resistance of harness between fuel pump con-
nector and chassis ground.
: Connector & terminal
(R58) No. 3—Chassis ground:
Is the resistance less than 10Ω?
: Go to next step 5).
: Go to step11AZ5.
G2M0863
5) Remove service hole cover located on the left rear of
luggage compartment floor.
B2M0940A
6) Disconnect connector from fuel sub meter unit.
7) Measure resistance of harness between fuel pump con-
nector and chassis ground.
: Connector & terminal
(R58) No. 3—Chassis ground:
Is the resistance less than 10Ω?
: Repair ground short circuit in harness between
fuel pump and fuel sub meter unit connector.
: Go to next step 8).
B2M0941A
8) Separate fuel tank cord connector (R57) and rear wir-
ing harness connector (R15).
9) Measure resistance of harness between fuel sub meter
unit connector and chassis ground.
: Connector & terminal
(R59) No. 1—Chassis ground:
Is the resistance less than 10Ω?
: Repair ground short circuit in fuel tank cord.
: Go to next step 10).
489
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B2M0942A
10) Separate rear wiring harness connector (R1) and bulk-
head wiring harness connector (B97).
11) Measure resistance of harness between rear wiring
harness connector and chassis ground.
: Connector & terminal
(R15) No. 3—Chassis ground:
Is the resistance less than 10Ω?
: Repair ground short circuit in rear wiring harness.
: Go to next step 12).
B2M1022A
12) Measure resistance of harness between bulkhead wir-
ing connector and chassis ground.
: Connector & terminal
(B97) No. J2—Chassis ground:
Is the resistance less than 10Ω?
: Go to next step 13).
: Repair ground short circuit in harness between
S.M.J. and ECM connector.
B2M1022A
13) Separate bulkhead wiring harness connector (B38)
and instrument panel wiring harness connector (i3).
14) Measure resistance of harness between bulkhead wir-
ing harness connector and chassis ground.
: Connector & terminal
(B97) No. J2—Chassis ground:
Is the resistance less than 10Ω?
: Repair ground short circuit in bulkhead wiring har-
ness.
: Repair ground short circuit in instrument panel
wiring harness.
490
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![SUBARU LEGACY 1997 Service Repair Manual B6M0121
11AZ5CHECK HARNESS BETWEEN COMBINA-
TION METER AND FUEL PUMP CONNEC-
TOR.
1) Connect connector to fuel pump.
2) Pull out combination meter from instrument panel. <Ref.
to 6-2 [W13A1].>
3) Disc SUBARU LEGACY 1997 Service Repair Manual B6M0121
11AZ5CHECK HARNESS BETWEEN COMBINA-
TION METER AND FUEL PUMP CONNEC-
TOR.
1) Connect connector to fuel pump.
2) Pull out combination meter from instrument panel. <Ref.
to 6-2 [W13A1].>
3) Disc](/manual-img/17/57434/w960_57434-2341.png)
B6M0121
11AZ5CHECK HARNESS BETWEEN COMBINA-
TION METER AND FUEL PUMP CONNEC-
TOR.
1) Connect connector to fuel pump.
2) Pull out combination meter from instrument panel.
to 6-2 [W13A1].>
3) Disconnect connector from combination meter.
B2M0945A
4) Measure resistance of harness between combination
meter connector and chassis ground.
: Connector & terminal
(i10) No. 3—Chassis ground:
Is the resistance less than 200Ω?
: Go to step11AZ6.
: Repair harness and connector.
NOTE:
In this case, repair the following:
Open circuit in harness between combination meter con-
nector and junction A on rear wiring harness
Poor contact in coupling connectors (i3 and B97)
11AZ6
CHECK COMBINATION METER.
1) Disconnect speedometer cable from combination meter
and remove combination meter.
: Is the fuel meter installation screw tightened
securely?
: Go to next step 2).
: Tighten fuel meter installation screw securely.
2) Remove printed circuit plate assembly from combina-
tion meter assembly.
: Is there flaw or burning on printed circuit
plate assembly?
: Replace printed circuit plate assembly.
: Replace fuel meter assembly.
491
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B2M1103
BA: DTC P0463
—FUEL LEVEL SENSOR CIRCUIT HIGH
INPUT—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
WIRING DIAGRAM:
B2M1021
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
492
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles
Page 2344 of 3342
11BA1CHECK SPEEDOMETER AND TACHOM-
ETER OPERATION IN COMBINATION
METER.
: Does speedometer and tachometer operate
normally?
: Go to step11BA3.
: Go to step11BA2.
B6M0121
11BA2CHECK GROUND CIRCUIT OF COMBINA-
TION METER.
1) Turn ignition switch to OFF.
2) Pull out combination meter from instrument panel.
to 6-2 [W13A1].>
3) Disconnect connector from combination meter.
B2M0934A
4) Measure resistance of harness between combination
meter connector and chassis ground.
: Connector & terminal
(i12) No. 1—Chassis ground:
Is resistance less than 5Ω?
: Repair or replace combination meter.
: Repair harness and connector.
NOTE:
In this case, repair the following:
Open circuit in harness between combination meter con-
nector and grounding terminal
Poor contact in combination meter connector
Poor contact in grounding terminal
493
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles