1996 SUBARU LEGACY Service Repair Manual

Page 1921 of 2890

SUBARU LEGACY 1996  Service Repair Manual 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

Page 1922 of 2890

SUBARU LEGACY 1996  Service Repair Manual B2M0541A
10G2CHECK INPUT SIGNAL FOR ECM.
(USING VOLTAGE METER AND SUBARU
SELECT MONITOR.)
1) Measure voltage between ECM connector and chassis
ground while throttle valve is fully closed.
: Connector

Page 1923 of 2890

SUBARU LEGACY 1996  Service Repair Manual OBD0700A
10G3CHECK HARNESS BETWEEN ECM AND
THROTTLE POSITION SENSOR CON-
NECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connectors from throttle position sensor.
3) Turn ignition switch to ON.

Page 1924 of 2890

SUBARU LEGACY 1996  Service Repair Manual OBD0702A
7) Measure resistance of harness between throttle posi-
tion sensor connector and engine ground.
: Connector & terminal
(E13) No. 2—Engine ground:
Is the resistance less than 10Ω?
: Repai

Page 1925 of 2890

SUBARU LEGACY 1996  Service Repair Manual 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 st

Page 1926 of 2890

SUBARU LEGACY 1996  Service Repair Manual 10H1
CHECK DTC P0120 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0120?
: Inspect DTC P0120 using“10. Diagnostics Chart
with Trouble Code 2-7 [T1000]”.
NO

Page 1927 of 2890

SUBARU LEGACY 1996  Service Repair Manual 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

Page 1928 of 2890

SUBARU LEGACY 1996  Service Repair Manual 10I1
CHECK DTC P0115 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0115?
: Inspect DTC P0115 using“10. Diagnostics Chart
with Trouble Code 2-7 [T1000]”.
NO