Subaru 2004 LEGACY Service Manual page 112

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
12 CHECK FUEL LEVEL.
13 CHECK STATUS OF MALFUNCTION INDI-
CATOR LIGHT.
1) Clear the memory using Subaru Select
Monitor.
<Ref. to EN(H6DO)(diag)-40, Clear Memory
Mode.>
2) Start the engine, and drive the vehicle more
than 10 minutes.
14 CHECK CAUSE OF MISFIRE DIAGNOSED.
15 CHECK AIR INTAKE SYSTEM.
Check
Is the fuel meter indication
lower than the "Lower" level?
Does the malfunction indicator
light illuminate or blink?
Was the cause of misfire
detected when the engine is
running?
Is there any fault in air intake
system?
EN(H6DO)(diag)-181
ENGINE (DIAGNOSTICS)
Yes
Replenish fuel so Go to step 13.
fuel meter indica-
tion is higher than
the "Lower" level.
After replenishing
fuel, Go to step 13.
Go to step 15. Go to step 14.
Finish diagnostics Repair the poor
operation, if the contact.
engine has no
NOTE:
abnormality.
In this case repair
the following:
• Poor contact in
ignition coil con-
nector
• Poor contact in
fuel injector con-
nector on faulty
cylinders
• Poor contact in
ECM connector
• Poor contact in
coupling connector
Repair air intake Go to step 16.
system.
NOTE:
Check the follow-
ing items:
• Are there air
leaks or air suction
caused by loose or
dislocated nuts
and bolts?
• Are there cracks
or any disconnec-
tion of hoses?
No