1997 SUBARU LEGACY obd

OBD0145A
10CK1
CHECK DATA FOR CONTROL.
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 ON and Subaru Select Monitor or
the OBD-II general scan tool switch ON.
4) Start engine.
5) Read data on Subaru Select Monitor or the OBD-II gen-
eral scan tool.

Subaru Select Monitor
Designate mode using function key.
Function mode: F20

F20: Display shows pressure signal value sent from the
pressure sensor.
B2M0755
: Is the value more than 133 kPa in function
mode F20?
: Replace pressure sensor.
: Even if MIL lights up, the circuit has returned to a
normal condition at this time. Contact with SOA
service.
NOTE:
Inspection by DTM is required, because probable cause is
deterioration of multiple parts.

OBD-II general scan tool
For detailed operation procedures, refer to the OBD-II Gen-
eral Scan Tool Instruction Manual.
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OBD0327
5) Turn ignition switch to OFF.
6) Measure resistance between EGR solenoid valve ter-
minals.
: Terminals
No. 1—No. 2:
Is the resistance less than 1Ω?
: Replace EGR solenoid valve and ECM.
: Go to next.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Replace ECM.
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OBD0338
5) Turn ignition switch to OFF.
6) Measure resistance between purge control solenoid
valve terminals.
: Terminals
No. 1—No. 2:
Is the resistance less than 1Ω?
: Replace purge control solenoid valve and ECM.
: Go to next.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Replace ECM.
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OBD0005B
10CQ1CHECK FUEL TANK PRESSURE CON-
TROL SOLENOID VALVE.
1) Turn ignition switch to OFF.
2) Connect test mode connector.
3) Turn ignition switch to ON.
: Does fuel tank pressure control solenoid
valve produce operating sound?
NOTE:
Fuel tank pressure control solenoid valve operation check
can also be executed using Subaru Select Monitor (Func-
tion mode: FD07). For the procedure, refer to“COMPUL-
SORY VALVE OPERATION CHECK MODE”. [T3F0].>
: Go to step10CQ2.
: Replace fuel tank pressure control solenoid valve.
10CQ2CHECK FUEL FILLER CAP AND FUEL
FILLER PIPE.
1) Turn ignition switch to OFF.
2) Open the fuel flap.
: Is the fuel filler cap tightened securely?
: Tighten fuel filler cap securely.
: Go to next.
: Is there any damage to the seal between
fuel filler cap and fuel filler pipe?
: Repair or replace fuel filler cap and fuel filler pipe.
: Go to step10CQ3.
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OBD0005B
10CR1CHECK FUEL TANK PRESSURE CON-
TROL SOLENOID VALVE.
1) Turn ignition switch to OFF.
2) Connect test mode connector.
3) Turn ignition switch to ON.
: Does fuel tank pressure control solenoid
valve produce operating sound?
NOTE:
Fuel tank pressure control solenoid valve operation check
can also be executed using Subaru Select Monitor (Func-
tion mode: FD07). For the procedure, refer to“COMPUL-
SORY VALVE OPERATION CHECK MODE”. [T3F0].>
: Go to step10CR2.
: Replace fuel tank pressure control solenoid valve.
10CR2CHECK FUEL FILLER CAP AND FUEL
FILLER PIPE.
1) Turn ignition switch to OFF.
2) Open the fuel flap.
: Is there any damage at fuel filler cap and
fuel filler pipe?
: Repair or replace fuel filler cap and fuel filler pipe.
: Go to step10CR3.
B2M0925A
10CR3CHECK VENT CONTROL SOLENOID
VA LV E .
Turn ignition switch to ON.
: Does vent control solenoid valve produce
operating sound?
NOTE:
Vent control solenoid valve operation check can also be
executed using Subaru Select Monitor (Function mode:
FD08). For the procedure, refer to“COMPULSORY VALVE
OPERATION CHECK MODE”.
: Go to step10CR4.
: Replace vent control solenoid valve.
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10CS1CHECK DTC P0461, P0462 OR P0463 ON
DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0461,
P0462 or P0463?
: Inspect DTC P0461, P0462 or P0463 using“10.
Diagnostics Chart with Trouble Code”. 2-7 [T10A0].>
NOTE:
In this case, it is not necessary to inspect this trouble.
: Replace fuel sending unit and fuel sub meter unit.
394
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OBD0527
CT: DTC P1500
—RADIATOR FAN RELAY 1 CIRCUIT LOW
INPUT—
DTC DETECTING CONDITION:

Two consecutive driving cycles with fault
TROUBLE SYMPTOM:

Radiator fan does not operate properly.

Overheating
WIRING DIAGRAM:
B2M1289
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODE.

395
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10. Diagnostic Chart with Trouble Code for LHD Vehicles

OBD0736A
10CT1
CHECK OUTPUT SIGNAL FROM ECM.
1) Turn ignition switch to OFF.
2) Connect test mode connector at the lower portion of
instrument panel (on the driver’s side), to the side of the
center console box.
3) Turn ignition switch to ON.
B2M0608A
4) Measure voltage between ECM and chassis ground.
: Connector & terminal
(B84) No. 74 (+)—Chassis ground:
Does voltage change between 0 and 10
volts?
NOTE:
Radiator fan relay operation check can be executed using
Subaru Select Monitor (Function mode: FD03). For
procedure, refer to“COMPULSORY VALVE OPERATION
CHECK MODE”.
: Repair poor contact in ECM connector.
: Go to step10CT2.
B2M1138A
10CT2CHECK GROUND SHORT CIRCUIT IN
RADIATOR FAN RELAY 1 CONTROL CIR-
CUIT.
1) Turn ignition switch to OFF.
2) Disconnect connectors from ECM.
3) Measure resistance of harness between ECM connec-
tor and chassis ground.
: Connector & terminal
(B84) No. 74—Chassis ground:
Is the resistance less than 10Ω?
: Repair ground short circuit in radiator fan relay 1
control circuit.
: Go to step10CT3.
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10. Diagnostic Chart with Trouble Code for LHD Vehicles