Page 2129 of 3342
B2M0936
2) Disconnect connector from fuel sub meter unit.
3) Measure resistance between connector terminals of
fuel sub meter unit.
: Terminals
No. 1—No. 2:
Is the resistance less than 100Ω?
: Go to step10BA6.
: Replace fuel sub meter unit.
B2M0937A
10BA6CHECK HARNESS BETWEEN FUEL
PUMP AND FUEL SUB METER UNIT
CONNECTOR.
Measure resistance of harness between fuel pump and fuel
sub meter unit connector.
: Connector & terminal
(R58) No. 3—(R59) No. 2:
Is the resistance less than 1Ω?
: Go to step10BA7.
: Repair open circuit in harness between fuel pump
and fuel sub meter unit connector.
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B2M0938A
10BA7CHECK GROUND CIRCUIT OF FUEL
LEVEL SENSOR.
Measure resistance of harness between fuel pump con-
nector and chassis ground.
: Connector & terminal
(R58) No. 5—Chassis ground:
Is the resistance less than 5Ω?
: Go to step10BA8.
: Repair harness and connector.
NOTE:
In this case, repair the following:
Open circuit in harness between fuel pump connector
and chassis grounding terminal
Poor contact in fuel pump connector
Poor contact in coupling connectors (R57, B98 and B22)
B2M0939A
10BA8CHECK HARNESS BETWEEN ECM AND
FUEL PUMP CONNECTOR.
1) Connect connector to fuel sub meter unit.
2) Turn ignition switch to ON.
3) Measure voltage between fuel pump connector and
chassis ground.
: Connector & terminal
(R58) No. 3 (+)—Chassis ground ( ):
Is the voltage less than 1 V?
: Repair harness and connector.
NOTE:
In this case, repair the following:
Open circuit in harness between fuel pump connector
and junction A on rear wiring harness
Poor contact in fuel sub meter unit connector
Poor contact in fuel pump connector
Poor contact in coupling connector (R57)
: Go to next step 4).
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H2M1418B
4) Turn ignition switch to OFF.
5) Disconnect connector from ECM.
6) Turn ignition switch to ON.
7) Measure voltage between ECM connector and chassis
ground.
: Connector & terminal
(B84) No. 27 (+)—Chassis ground:
Is the voltage less than 1 V?
: Repair harness and connector.
NOTE:
In this case, repair the following:
Open circuit in harness between ECM connector and
junction A on rear wiring harness
Poor contact in coupling connector (B98)
: Repair connector.
NOTE:
In this case, repair the following:
Poor contact in fuel pump connector
Poor contact in fuel sub meter unit
Poor contact in ECM connector
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OBD0340
BB: DTC P0500
—VEHICLE SPEED SENSOR MALFUNCTION
—
DTC DETECTING CONDITION:
Immediately at fault recognition
WIRING DIAGRAM:
B2M1285
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
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![SUBARU LEGACY 1997 Service Repair Manual 10BB1CHECK SPEEDOMETER OPERATION IN
COMBINATION METER.
: Does speedometer operate normally?
: Go to step10BB2.
: Check speedometer and vehicle speed sensor
<Ref. to 6-2 [K3A0].>.
B2M0573A
10BB2CHECK H SUBARU LEGACY 1997 Service Repair Manual 10BB1CHECK SPEEDOMETER OPERATION IN
COMBINATION METER.
: Does speedometer operate normally?
: Go to step10BB2.
: Check speedometer and vehicle speed sensor
<Ref. to 6-2 [K3A0].>.
B2M0573A
10BB2CHECK H](/manual-img/17/57434/w960_57434-2132.png)
10BB1CHECK SPEEDOMETER OPERATION IN
COMBINATION METER.
: Does speedometer operate normally?
: Go to step10BB2.
: Check speedometer and vehicle speed sensor
.
B2M0573A
10BB2CHECK HARNESS BETWEEN ECM AND
COMBINATION METER CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from TCM.
3) Turn ignition switch to ON.
4) Measure voltage between ECM and chassis ground.
: Connector & terminal
(B84) No. 83 (+)—Chassis ground ( ):
Is the voltage more than 2 V?
: Repair harness and connector.
NOTE:
In this case, repair the following:
Open circuit in harness between ECM and combination
meter connector
Poor contact in ECM connector
Poor contact in combination meter connector
Poor contact in coupling connector (B37)
: Go to step10BB3.
B2M0574A
10BB3CHECK HARNESS BETWEEN ECM AND
COMBINATION METER CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from ECM.
3) Measure resistance of harness between ECM connec-
tor and chassis ground.
: Connector & terminal
(B84) No. 83—Chassis ground:
Is the resistance less than 10Ω?
: Repair ground short circuit in harness between
ECM and combination meter connector.
: Repair poor contact in ECM connector.
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OBD0358
BC: DTC P0505
—IDLE CONTROL SYSTEM MALFUNCTION
—
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
Erroneous idling
Engine stalls.
Engine breathing
WIRING DIAGRAM:
B2M1311
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
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10BC1
CHECK AIR INTAKE SYSTEM.
1) Turn ignition switch to ON.
2) Start engine, and idle it.
: Is there a fault in air intake system?
NOTE:
Check the following items.
Loose installation of intake manifold, idle air control sole-
noid valve and throttle body
Cracks of intake manifold gasket, idle air control sole-
noid valve gasket and throttle body gasket
Loose connections and cracks of idle air control solenoid
valve by-pass hoses
Disconnections of vacuum hoses
: Repair or replace air intake system.
: Go to step10BC2.
B2M0576A
10BC2
CHECK OUTPUT SIGNAL FROM ECM.
1) Turn ignition switch to ON.
2) Measure voltage between ECM and chassis ground.
: Connector & terminal
(B84) No. 13 (+)—Chassis ground ( ):
Is the voltage more than 3 V?
: Go to next.
: Go to step10BC4.
: Connector & terminal
(B84) No. 14 (+)—Chassis ground ( ):
Is the voltage more than 3 V?
: Go to next step 3).
: Go to step10BC4.
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B2M0576A
3) Turn ignition switch to OFF.
4) Disconnect connector from idle air control solenoid
valve.
5) Turn ignition switch to ON.
6) Measure voltage between ECM and chassis ground.
: Connector & terminal
(B84) No. 13 (+)—Chassis ground ( ):
Is the voltage more than 10 V?
: Repair battery short circuit in harness between
ECM and idle air control solenoid valve connector.
After repair, replace ECM.
: Go to next.
: Connector & terminal
(B84) No. 14 (+)—Chassis ground ( ):
Is the voltage more than 10 V?
: Repair battery short circuit in harness between
ECM and idle air control solenoid valve connector.
After repair, replace ECM.
: Go to next.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Go to step10BC3.
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