Subaru 2002 IMPREZA Service Manual page 647

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODE (DTC) ON DISPLAY.
2 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-
trol solenoid valve gasket and throttle body
gasket
•Disconnections of vacuum hoses
3 CHECK THROTTLE CABLE.
4 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-39, REMOVAL,
Idle Air Control Solenoid Valve.>
3)Confirm that there are no foreign particles in
by-pass air line.
Check
Is any other DTC displayed?
Is there a fault in air intake sys-
tem?
Does the throttle cable have
play for adjustment?
Are foreign particles in by-pass
air line?
EN-215
ENGINE (DIAGNOSTICS)
Yes
Inspect the rele- Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN-83, List of
Diagnostic Trou-
ble Code (DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
P0507.
Repair the air suc- Go to step 3.
tion and leaks.
Go to step 4. Adjust the throttle
cable. <Ref. to SP-
9, INSTALLA-
TION, Accelerator
Control Cable.>
Remove the for- Replace the idle
eign particles from air control solenoid
by-pass air line. valve. <Ref. to FU-
39, INSTALLA-
TION, Idle Air
Control Solenoid
Valve.>
No