1997 SUBARU LEGACY sensor

H2M1376B
: Connector & terminal
(B84) No. 20—(R47) No. 1:
Is the resistance less than 1Ω?
: Go to next.
: Repair harness and connector.
NOTE:
In this case, repair the following:

Open circuit in harness between ECM and fuel tank
pressure sensor connector

Poor contact in coupling connector (B97)
: Is there poor contact in fuel tank pressure
sensor connector?
: Repair poor contact in fuel tank pressure sensor
connector.
: Replace fuel tank pressure sensor.
B2M0927
11AX4CHECK HARNESS BETWEEN ECM AND
FUEL TANK PRESSURE SENSOR CON-
NECTOR.
1) Turn ignition switch to OFF and Subaru Select Monitor
or the OBD-II general scan tool switch to OFF.
2) Detach right side rear quarter trim panel.
3) Remove right side rear quarter trim pocket.
4) Detach right side rear quarter insulator.
H2M1326
5) Disconnect connector from fuel tank pressure sensor.
6) Remove fuel filler cap.
7) Install fuel filler cap.
8) Turn ignition switch to ON and Subaru Select Monitor or
the OBD-II general scan tool switch to ON.
9) Read data on Subaru select monitor or the OBD-II gen-
eral scan tool.

Subaru Select Monitor
Designate mode using function key.
Function mode: F43
: Is the value more than 2.8 kPa in function
mode F43?
: Repair battery short circuit in harness between
ECM and fuel tank pressure sensor connector.
: Replace fuel tank pressure sensor.

OBD-II general scan tool
For detailed operation procedures, refer to the OBD-II Gen-
eral Scan Tool Instruction Manual.
483
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

B2M1101
AY: DTC P0461
—FUEL LEVEL SENSOR CIRCUIT RANGE/
PERFORMANCE PROBLEM—
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.

484
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

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

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
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

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

H2M1414B
11BA3CHECK 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 more than 4.75 V?
: Go to step11BA4.
: 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)
G2M0340
11BA4
CHECK FUEL LEVEL SENSOR.
1) Turn ignition switch to OFF.
2) Remove fuel pump access hole lid located on the right
rear of luggage compartment floor.
B2M0935
3) Disconnect connector from fuel pump.
4) Measure resistance between connector terminals of
fuel pump.
: Terminals
No. 3—No. 5:
Is the resistance less than 100Ω?
: Go to step11BA5.
: Replace fuel sending unit.
G2M0863
11BA5
CHECK FUEL SUB LEVEL SENSOR.
1) Remove service hole cover located on the left rear of
luggage compartment floor.
494
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

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 step11BA6.
: Replace fuel sub meter unit.
B2M0937A
11BA6CHECK 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 step11BA7.
: Repair open circuit in harness between fuel pump
and fuel sub meter unit connector.
B2M0938A
11BA7CHECK 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 step11BA8.
: 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, B97 and B22)
495
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

OBD0340
BB: DTC P0500
—VEHICLE SPEED SENSOR
MALFUNCTION—
WIRING DIAGRAM:
B2M1285
NOTE:
Check vehicle speed sensor 2 circuit.

497
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles