Subaru 2009 IMPREZA Service Manual page 647

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
2 CHECK AIR CLEANER ELEMENT.
1) Turn the ignition switch to OFF.
2) Check the air cleaner element.
3 CHECK ELECTRONIC THROTTLE CON-
TROL.
1) Remove the electronic throttle control.
2) Check the electronic throttle control.
Check
Is there excessive clogging on
air cleaner element?
Are foreign matter found inside
electronic throttle control?
EN(H4SO)(diag)-230
Yes No
Check the appro- Go to step 2.
priate DTC using
the "List of Diag-
nostic Trouble
Code (DTC)".
<Ref. to
EN(H4SO)(diag)-
86, List of Diagnos-
tic Trouble Code
(DTC).>
Replace the air Go to step 3.
cleaner element.
<Ref. to IN(H4SO)-
4, Air Cleaner Ele-
ment.>
Remove foreign Perform the diag-
matter from elec- nosis of DTC
tronic throttle con- P2101. <Ref. to
trol. EN(H4SO)(diag)-
282, DTC P2101
THROTTLE
ACTUATOR CON-
TROL MOTOR
CIRCUIT RANGE/
PERFORMANCE,
Diagnostic Proce-
dure with Diagnos-
tic Trouble Code
(DTC).>