Page 1915 of 2890
OBD0172
F: DTC P0115
—ENGINE COOLANT TEMPERATURE
SENSOR CIRCUIT MALFUNCTION (TW)—
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
Hard to start
Erroneous idling
Poor driving performance
10F1Connect Subaru Select Monitor or the OBD-II
general scan tool, and read data.
10F2Check harness between engine coolant
temperature sensor and ECM connector.
10F3Check harness between engine coolant
temperature sensor and ECM connector.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
WIRING DIAGRAM:
B2M0539
147
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10. Diagnostics Chart with Trouble Code
Page 1919 of 2890
OBD0181
G: DTC P0120
—THROTTLE POSITION SENSOR CIRCUIT
MALFUNCTION (THV)—
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
Erroneous idling
Engine stalls.
Poor driving performance
10G1Connect Subaru Select Monitor or the OBD-II
general scan tool and read data.
10G2Check input signal for ECM. (Using voltage
meter and Subaru select monitor.)
10G3Check harness between ECM and throttle
position sensor connector.
10G4Check harness between throttle position
sensor and body connector.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
151
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10. Diagnostics Chart with Trouble Code
Page 1921 of 2890
OBD0145A
10G1CONNECT 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.
B2M0482
5) Read data on Subaru Select Monitor or OBD-II general
scan tool.
Subaru Select Monitor
Designate mode using function key.
Function mode: F07
F07: Throttle position sensor output signal is indicated.
: Is the value less than 0.1 V in function
mode F07?
: Go to step10G2.
: Go to next.
B2M0482
: Is the value more than 4.9 V in function
mode F07?
: Go to step10G4.
: 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 throttle position sensor connector
Poor contact in ECM connector
Poor contact in coupling connector (B21)
OBD-II general scan tool
For detailed operation procedures, refer to the OBD-II Gen-
eral Scan Tool Instruction Manual.
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10. Diagnostics Chart with Trouble Code
Page 1925 of 2890
OBD0189
H: DTC P0121
—THROTTLE POSITION SENSOR CIRCUIT
RANGE/PERFORMANCE PROBLEM
(TH
—R)—
DTC DETECTING CONDITION:
Two consecutive trips with fault
TROUBLE SYMPTOM:
Erroneous idling
Engine stalls.
Poor driving performance
10H1Check DTC P0120 on display.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
WIRING DIAGRAM:
B2M0540
157
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code
Page 1927 of 2890
OBD0191
I: DTC P0125
—INSUFFICIENT COOLANT TEMPERATURE
FOR CLOSED LOOP FUEL CONTROL
(TW
—CL)—
DTC DETECTING CONDITION:
Two consecutive trips with fault
TROUBLE SYMPTOM:
Engine would not return to idling.
10I1Check DTC P0115 on display.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
WIRING DIAGRAM:
B2M0539
159
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code
Page 1929 of 2890
OBD0199
J: DTC P0130
—FRONT OXYGEN SENSOR CIRCUIT
MALFUNCTION (FO2
—V)—
DTC DETECTING CONDITION:
Two consecutive trips with fault
10J1Check for other causes affecting exhaust gas.
10J2Check front oxygen sensor data.
10J3Check harness between front oxygen sensor
and ECM connector.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
WIRING DIAGRAM:
LHD Model
B2M0544
161
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10. Diagnostics Chart with Trouble Code
Page 1932 of 2890
OBD0209
K: DTC P0133
—FRONT OXYGEN SENSOR CIRCUIT SLOW
RESPONSE (FO2
—R)—
DTC DETECTING CONDITION:
Two consecutive trips with fault
10K1Check DTC P0130 on display.
10K2Check exhaust system.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
WIRING DIAGRAM:
LHD Model
B2M0544
164
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10. Diagnostics Chart with Trouble Code
Page 1934 of 2890
OBD0212
L: DTC P0135
—FRONT OXYGEN SENSOR HEATER
CIRCUIT MALFUNCTION (FO2H)—
DTC DETECTING CONDITION:
Two consecutive trips with fault
10L1Check DTC P0141 on display.
10L2Connect Subaru Select Monitor or the OBD-II
general scan tool, and read data.
10L3Check output signal from ECM. (Using voltage
meter.)
10L4Check power supply to front oxygen sensor.
10L5Check front oxygen sensor.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
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10. Diagnostics Chart with Trouble Code
