SUBARU LEGACY 1997 Service Repair Manual

B2M1080
W: DTC P0183
—FUEL TEMPERATURE SENSOR A CIRCUIT
HIGH INPUT—
DTC DETECTING CONDITION:

Immediately at fault recognition
WIRING DIAGRAM:
B2M1015
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
<Ref. to 2-7 [T3D0] and [T3E0].>
450
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

B2M1016A
11W1CONNECT SUBARU SELECT MONITOR
OR THE OBD-II GENERAL SCAN TOOL,
AND READ DATA.
1) Turn ignition switch to OFF.
2) Connect Subaru Select Monitor or the OBD-II general
scan tool to data link connector.
3) Turn ignition switch to ON and Subaru Select Monitor or
OBD-II general scan tool switch to ON.
4) Start engine.
H2M1308
5) Read data on Subaru Select Monitor or OBD-II general
scan tool.

Subaru Select Monitor
Designate mode using function key.
Function mode: F44

F44: Fuel temperature is indicated in“°C”and“°F”.
: Is the value less than40°Cor40°Fin
function mode F44?
: Go to step11W2.
: Repair poor contact.
NOTE:
In this case, repair the following:

Poor contact in fuel pump connector

Poor contact in ECM connector

Poor contact in coupling connector (B22, B97 and R57)

OBD-II general scan tool
For detailed operation procedures, refer to the OBD-II Gen-
eral Scan Tool Instruction Manual.
G2M0340
11W2CHECK HARNESS BETWEEN FUEL TEM-
PERATURE SENSOR AND ECM CON-
NECTOR.
1) Turn ignition switch to OFF.
2) Remove access hole lid.
3) Disconnect connector from fuel pump.
B2M0917A
4) Measure voltage between fuel pump connector and
chassis ground.
: Connector & terminal
(R58) No. 6 (+)—Chassis ground ():
Is the voltage more than 10 V?
: Repair battery short circuit in harness between
ECM and fuel pump connector.
: Go to next step 5).
451
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

B2M0917A
5) Turn ignition switch to ON.
6) Measure voltage between fuel pump connector and
chassis ground.
: Connector & terminal
(R58) No. 6 (+)—Chassis ground ():
Is the voltage more than 10 V?
: Repair battery short circuit in harness between
ECM and fuel pump connector.
: Go to step11W3.
B2M0917A
11W3CHECK HARNESS BETWEEN FUEL TEM-
PERATURE SENSOR AND ECM CON-
NECTOR.
1) Measure voltage between fuel pump connector and
chassis ground.
: Connector & terminal
(R58) No. 6 (+)—Chassis ground ():
Is the voltage more than 4 V?
: Go to next step 2).
: Repair harness and connector.
NOTE:
In this case, repair the following:

Open circuit in harness between ECM and fuel pump
connector

Poor contact in fuel pump connector

Poor contact in ECM connector

Poor contact in coupling connectors (B97 and R57)
B2M0918A
2) Turn ignition switch to OFF.
3) 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?
: Replace fuel temperature sensor.
: Repair harness and connector.
NOTE:
In this case, repair the following:

Open circuit in harness between ECM and fuel pump
connector

Poor contact in fuel pump connector

Poor contact in ECM connector

Poor contact in coupling connectors (B22, B97 and R57)
452
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

B2M1081
X: DTC P0261
—FUEL INJECTOR CIRCUIT LOW INPUT -
#1—
B2M1082
Y: DTC P0264
—FUEL INJECTOR CIRCUIT LOW INPUT -
#2—
B2M1083
Z: DTC P0267
—FUEL INJECTOR CIRCUIT LOW INPUT -
#3—
B2M1084
AA: DTC P0270
—FUEL INJECTOR CIRCUIT LOW INPUT -
#4—
453
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

WIRING DIAGRAM:
B2M0784
NOTE:
Check fuel injector circuit.
<Ref. to 2-7 [T10X0].>
454
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

B2M1085
AB: DTC P0262
—FUEL INJECTOR CIRCUIT HIGH INPUT -
#1—
B2M1086
AC: DTC P0265
—FUEL INJECTOR CIRCUIT HIGH INPUT -
#2—
B2M1087
AD: DTC P0268
—FUEL INJECTOR CIRCUIT HIGH INPUT -
#3—
B2M1088
AE: DTC P0271
—FUEL INJECTOR CIRCUIT HIGH INPUT -
#4—
455
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

WIRING DIAGRAM:
B2M0784
NOTE:
Check fuel injector circuit.
<Ref. to 2-7 [T10AB0].>
456
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

OBD0277
AF: DTC P0301
—CYLINDER 1 MISFIRE DETECTED—
OBD0278
AG: DTC P0302
—CYLINDER 2 MISFIRE DETECTED—
OBD0279
AH: DTC P0303
—CYLINDER 3 MISFIRE DETECTED—
OBD0280
AI: DTC P0304
—CYLINDER 4 MISFIRE DETECTED—
457
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

WIRING DIAGRAM:
B2M0791
NOTE:
Check fuel injection control system.
<Ref. to 2-7 [T10AF0].>
458
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles

OBD0283
AJ: DTC P0325
—KNOCK SENSOR CIRCUIT
MALFUNCTION—
WIRING DIAGRAM:
B2M1089
NOTE:
Check knock sensor circuit.
<Ref. to 2-7 [T10AJ0].>
459
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostic Chart with Trouble Code for RHD Vehicles