Subaru 2002 IMPREZA Service Manual page 472

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
BH:DTC PO506
-
IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED
-
DTC DETECTING CONDITION:
TROUBLE SYMPTOM:
Two consecutive driving cycles with fault
Engine is difficult to start.
Engine does not start.
Erroneous idling
Engine stalls.
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(D0HC TURBO)-
49, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(D0HC TURBO)-46, Inspec-
tion Mode.>.
WIRING DIAGRAM:
MAIN RELAY
BATTERY
SBF-5
3 c
AIR CONTROL
SOLENOID
VALVE
@
ECM
5 6 7 8
EN1160
EN(D0HC TURBO)-248