Subaru IMPREZA GD 2007 Series Manual page 1578

asieps_tobira_IM_US.book 247 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CD:DTC P0519 IDLE AIR CONTROL SYSTEM PERFORMANCE
DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(STI)-179, DTC P0519 IDLE AIR CONTROL SYSTEM PERFOR-
MANCE, Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
Engine keeps running at higher speed than specified idle speed.
CAUTION:
After repairing or replacing the defective part, perform the Clear Memory Mode <Ref. to EN(STI)(di-
ag)-48, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(STI)(diag)-39, PROCE-
DURE, Inspection Mode.>.
Step
1 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
2 CHECK AIR INTAKE SYSTEM.
1) Start and idle the engine.
2) Check the following items.
• Loose installation of intake manifold and
throttle body
• Cracks of intake manifold gasket and throttle
body gasket
• Disconnection of vacuum hoses
3 CHECK ELECTRONIC THROTTLE CON-
TROL.
1) Turn the ignition switch to OFF.
2) Remove the electronic throttle control. <Ref.
to FU(H4DOTC)-16, Throttle Body.>
3) Check the electronic throttle control.
Check
Is there any fault in air intake
system?
Are foreign matter found inside
electronic throttle control?
EN(STI)(diag)-247
ENGINE (DIAGNOSTICS)
Yes No
Go to step 2.
Check the appro-
priate DTC using
the "List of Diag-
nostic Trouble
Code (DTC)".
<Ref. to
EN(STI)(diag)-71,
List of Diagnostic
Trouble Code
(DTC).>
Go to step 3.
Repair air suction
and leaks.
Remove foreign Perform the diag-
matter from elec- nosis of DTC
tronic throttle con- P2101. <Ref. to
trol. EN(STI)(diag)-
323, DTC P2101
THROTTLE
ACTUATOR CON-
TROL MOTOR
CIRCUIT RANGE/
PERFORMANCE,
Diagnostic Proce-
dure with Diagnos-
tic Trouble Code
(DTC).>