Subaru 2002 IMPREZA Service Manual page 563

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENG I NE (DIAGNOSTICS)
Yes
Inspect DTC-
P0506, P0507,
P0508,
PO509
or
P1142 using "List
of Diagnostic Trou-
ble Code (DTC)".
<Ref. to EN(D0HC
TURBO)-80, List
of Diagnostic Trou-
ble Code (DTC). >
NOTE:
In this case, it is
not necessary to
inspect DTC
P1507.
Repair air suction
and leaks.
Step
CHECK ANY OTHER DTC ON DISPLAY.
No
Go to step 2.
Go to step
3. CHECK AIR INTAKE SYSTEM.
1)Turn the ignition switch to ON.
2)Start the engine, and idle it.
3)Check the following items.
*Loose installation of intake manifold, idle air
control solenoid valve and throttle body
*Cracks of intake manifold gasket, idle air con-
fro1 solenoid valve gasket and throttle body
gasket
*Disconnections of vacuum hoses
CHECK THROlTLE CABLE.
Remove foreign
particles from by-
pass air line.
CHECK AIR BV-PASS LINE.
1)Turn the ignition switch to OFF.
2)Remove the idle air control solenoid valve
from throttle body. <Ref. to FU(D0HC
TURBO)-36, Idle Air Control Solenoid Valve.>
3)Confirm that there are no foreign particles in
bV-DaSS air line.
cable. <Ref.
to
TION, Accelerator
Control Cable.>
Replace the idle
air control solenoid
valve. <Ref. to
FU( DOHC
TURBO)-36, Idle
Air Control Sole-
noid Valve.>
SP-7, INSTALLA-
Check
>oes the Subaru Select Moni-
or or OBD-ll general scan tool
ndicate DTC P0506, P0507,
'0508, PO509 or P1142?
s there a fault in air intake sys-
em?
>oes the throttle cable have
)lay for adjustment?
ire foreign particles in by-pass
tir line?
EN(D0HC TURBO)-339