1997 SUBARU LEGACY Service Repair Manual

Page 2009 of 3342

SUBARU LEGACY 1997  Service Repair Manual OBD0145A
10I1CONNECT 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 2010 of 3342

SUBARU LEGACY 1997  Service Repair Manual OBD0696A
5) Turn ignition switch to ON.
6) Measure voltage between engine coolant temperature
sensor connector and engine ground.
: Connector & terminal
(E8) No. 1 (+)—Engine ground (�):
Is the volt

Page 2011 of 3342

SUBARU LEGACY 1997  Service Repair Manual B2M1069
J: DTC P0121
—THROTTLE POSITION SENSOR CIRCUIT
RANGE/PERFORMANCE PROBLEM (HIGH
INPUT)—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
TROUBLE SYMPTOM:
Erroneous idlin

Page 2012 of 3342

SUBARU LEGACY 1997  Service Repair Manual 10J1CHECK DTC P0122 OR P0123 ON DIS-
PLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0122 or
P0123?
: Inspect DTC P0122 or P0123 using“10. Diagnos-
tics Chart with T

Page 2013 of 3342

SUBARU LEGACY 1997  Service Repair Manual B2M1070
K: DTC P0122
—THROTTLE POSITION SENSOR CIRCUIT
LOW INPUT—
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
Erroneous idling
Engine stalls.
Poor driving perfor

Page 2014 of 3342

SUBARU LEGACY 1997  Service Repair Manual OBD0145A
10K1CONNECT 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 2015 of 3342

SUBARU LEGACY 1997  Service Repair Manual B2M0541A
10K2CHECK 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 2016 of 3342

SUBARU LEGACY 1997  Service Repair Manual OBD0700A
10K3CHECK 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.