Subaru 2006 Legacy, Manual

Page: 1665 / 4302

EN(H4DOTC)(diag)-163
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
12 CHECK FUEL LEVEL.
Is the fuel meter indication
higher than the “Lower” level? Go to step
13
. Replenish fuel so
fuel meter indica-
tion is higher than
the “Lower” level.
After refueling, Go
to step
13 .
13 CHECK STATUS OF MALFUNCTION INDI-
CATOR LIGHT.
1) Clear the memory using Subaru Select
Monitor. <Ref. to EN(H4DOTC)(diag)-42, Clear
Memory Mode.>
2) Start the engine, and drive the vehicle more
than 10 minutes.
Does the malfunction indicator
light illuminate or blink? Go to step 15 . Go to step 14 .
14 CHECK CAUSE OF MISFIRE. Has the cause of misfire diag-
nosed when the engine is run-
ning? Finish diagnostics
operation, if the
engine has no
abnormality. Repair the poor
contact.
NOTE:
In this case, repair
the following item:
• Poor contact of
ignition coil con-
nector
• Poor contact of
fuel injector con-
nector on faulty
cylinders
• Poor contact in
ECM connector
• Poor contact of
coupling connector
15 CHECK AIR INTAKE SYSTEM. Is there any fault in air intake
system? Repair the air
intake 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?
Go to step 16 .
16 CHECK CYLINDER.
Is there any fault in the cylin-
der? Repair or replace
faulty parts.
NOTE:
Check the follow-
ing items.
• Spark plug
• Fuel Injector
• Compression
Go to DTC P0171
and P0172. <Ref.
to EN(H4DOTC)
(diag)-137, DTC
P0171 SYSTEM
TOO LEAN (BANK
1), Diagnostic Pro-
cedure with Diag-
nostic Trouble
Code (DTC).>
Step Check Yes No
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