Subaru IMPREZA 2002 Service Manual page 565

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Replace the idle
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK AIR BY-PASS LINE.
1)Turn the ignition switch to OFF.
2)Remove the idle air control solenoid valve
from throttle body. <Ref. to FU(S0HC)-36,
REMOVAL, Idle Air Control Solenoid Valve.>
3)Remove the throttle body from intake mani-
fold. <Ref. to FU(S0HC)-14, REMOVAL,
Throttle Body.>
4)Using an air gun, force air into the idle air
control solenoid valve installation area. Con-
firm that forced air subsequently escapes from
throttle body interior.
deplace the throt-
Check
loes the Subaru Select Moni-
or or OBD-ll general scan tool
ndicate DTC P I 51 0, P I 51 1,
'1512, P1513, P1514, P1515,
' 1 51 6 or P I 51 7?
air control solenoid
valve. <Ref. to
INSTALLATION,
Idle Air Control
Solenoid Valve.>
FU(S0HC)-36,
loes air flow out?
tle body. <Ref. to
FU(S0HC)-14,
Throttle Body.>
INSTALLATION,
Yes
Inspect DTC
P1510, P1511,
P1512, P1513,
P1514, P1515,
PI516 or PI517
using "List of Diag-
nostic Trouble
Code (DTC)".
<Ref. to
List of Diagnostic
Trouble Code
(DTC).>
NOTE:
In this case, it is
not necessary tc
inspect DTC
P0506.
EN(S0HC)-77,
No
i o
to step 2.
EN(S0HC)-241