Subaru Forester 2004 Service Manual page 160

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK AIR INTAKE SYSTEM.
1) Turn the ignition switch to ON.
2) Start and idle the engine.
3) Check the following items:
• Loose installation of intake manifold and
throttle body
• Cracks of intake manifold gasket and throttle
body gasket
• Disconnections of vacuum hoses
3 CHECK ELECTRONIC THROTTLE CON-
TROL.
1) Turn the ignition switch to OFF.
2) Replace the electronic throttle control.
3) Check the electronic throttle control.
Check
Is any other DTC displayed?
Is there any fault in air intake
system?
Are foreign matters found
inside the electronic throttle
control?
EN(H4DOTC 2.5)-159
ENGINE (DIAGNOSTIC)
Yes
Inspect the rele- Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4DOTC 2.5)-
65, List of Diag-
nostic Trouble
Code (DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
P0519.
Repair air suction Go to step 3.
and leaks.
Remove foreign Perform the diag-
matters from the nosis of DTC
electronic throttle P2101.
control.
No