1997 SUBARU LEGACY Service Repair Manual

Page 2033 of 3342

SUBARU LEGACY 1997  Service Repair Manual 10Q1
CHECK DTC P0130 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0130?
: Go to step10Q2.
: Go to step10Q3.
10Q2
CHECK FAILURE CAUSE OF P0130.
Perform the ste

Page 2034 of 3342

SUBARU LEGACY 1997  Service Repair Manual B2M0488
: Is the value fixed between 0.2 and 0.4 V in
function mode F13?
: Go to step10Q4.
: Replace rear oxygen sensor.
OBD-II general scan tool
For detailed operation procedures, refer to the OBD-I

Page 2035 of 3342

SUBARU LEGACY 1997  Service Repair Manual OBD0229
R: DTC P0139
—REAR OXYGEN SENSOR CIRCUIT SLOW
RESPONSE—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
WIRING DIAGRAM:
B2M1077
CAUTION:
After repair or replacement of

Page 2036 of 3342

SUBARU LEGACY 1997  Service Repair Manual 10R1
CHECK DTC P0136 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0136?
: Inspect DTC P0136 using“10. Diagnostics Chart
with Trouble Code”. <Ref. to 2-7 [

Page 2037 of 3342

SUBARU LEGACY 1997  Service Repair Manual OBD0232
S: DTC P0141
—REAR OXYGEN SENSOR HEATER
CIRCUIT MALFUNCTION—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
WIRING DIAGRAM:
B2M1078
CAUTION:
After repair or replacemen

Page 2038 of 3342

SUBARU LEGACY 1997  Service Repair Manual 10S1
CHECK DTC P0135 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0141 and
P0135 at the same time?
: Go to next step 1).
: Go to step10S2.
B2M0553A
1) Turn ig

Page 2039 of 3342

SUBARU LEGACY 1997  Service Repair Manual NOTE:
In this case, repair the following:
Poor contact in rear oxygen sensor connector
Poor contact in rear oxygen sensor connecting harness
connector
Poor contact in ECM connector
: Go to step10S3

Page 2040 of 3342

SUBARU LEGACY 1997  Service Repair Manual Except 2200 cc California spec. vehicles
(T6) No. 2 (+)—Chassis ground (�):
Is the voltage more than 10 V?
: Go to step10S5.
: Repair power supply line.
NOTE:
In this case, repair the following:
O