Subaru IMPREZA 2002 Service Manual page 564

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
BG: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(S0HC)-43, OP-
ERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(S0HC)-40, OPERATION, Inspec-
tion Mode.>.
WIRING DIAGRAM:
MAIN RELAY
AIR CONTROL
SOLENOID
EN1099
EN( SO HC)-240