1997 SUBARU LEGACY Service Repair Manual

Page 2137 of 3342

SUBARU LEGACY 1997  Service Repair Manual B2M0769
10BC3CHECK IDLE AIR CONTROL SOLENOID
VA LV E .
1) Turn ignition switch to OFF.
2) Measure resistance between idle air control solenoid
valve connector terminals.
: Terminals
No. 1—No. 2:
Is

Page 2138 of 3342

SUBARU LEGACY 1997  Service Repair Manual B2M0578A
10BC4CHECK POWER SUPPLY TO IDLE AIR
CONTROL SOLENOID VALVE.
1) Turn ignition switch to OFF.
2) Disconnect connector from idle air control solenoid
valve.
3) Turn ignition switch to ON.
4) Mea

Page 2139 of 3342

SUBARU LEGACY 1997  Service Repair Manual : Connector & terminal
(B84) No. 14—Chassis ground:
Is the resistance less than 10Ω?
: Repair ground short circuit in harness between
ECM and idle air control solenoid valve connector.
: Go to nex

Page 2140 of 3342

SUBARU LEGACY 1997  Service Repair Manual B2M1104
BD: DTC P0506
—IDLE CONTROL SYSTEM RPM LOWER
THAN EXPECTED—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
TROUBLE SYMPTOM:
Engine is difficult to start.
Engine does

Page 2141 of 3342

SUBARU LEGACY 1997  Service Repair Manual 10BD1
CHECK DTC P0505 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0505?
: Inspect DTC P0505 using“10. Diagnostics Chart
with Trouble Code”. <Ref. to 2-7

Page 2142 of 3342

SUBARU LEGACY 1997  Service Repair Manual B2M1105
BE: DTC P0507
—IDLE CONTROL SYSTEM RPM HIGHER
THAN EXPECTED—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
TROUBLE SYMPTOM:
Engine keeps running at higher revolution

Page 2143 of 3342

SUBARU LEGACY 1997  Service Repair Manual 10BE1
CHECK DTC P0505 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0505?
: Inspect DTC P0505 using“10. Diagnostics Chart
with Trouble Code”. <Ref. to 2-7

Page 2144 of 3342

SUBARU LEGACY 1997  Service Repair Manual BF: DTC P0600
—SERIAL COMMUNICATION LINK
MALFUNCTION—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
WIRING DIAGRAM:
B2M1312
CAUTION:
After repair or replacement of faulty par