Subaru Legacy IV (2008 year). Manual - part 560
EN(H6DO)(diag)-213
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
13
CHECK CAUSE OF MISFIRE.
Was the cause of misfire identi-
fied when the engine is run-
ning?
Finish diagnostics
operation, if the
engine has no
abnormality.
Repair the poor
contact of connec-
tor.
NOTE:
In this case, repair
the following item:
• Poor contact of
ignition coil con-
nector
• Poor contact in
fuel injector con-
nector on faulty
cylinders
• Poor contact in
ECM connector
• Poor contact of
coupling connector
14
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 15.
15
CHECK MISFIRE SYMPTOM.
1) Turn the ignition switch to ON.
2) Read the DTC.
NOTE:
• SUBARU SELECT MONITOR
For detailed operation procedure, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H6DO)(diag)-34, Subaru Select Moni-
tor.>
• General Scan Tool
For detailed operation procedures, refer to the
general scan tool operation manual.
Does the Subaru Select Moni-
tor or general scan tool indicate
only one DTC?
Go to step 21.
Go to step 16.
16
CHECK FOR ANY OTHER DTC ON DISPLAY. Are DTCs P0301 and P0302
displayed?
Go to step 22.
Go to step 17.
17
CHECK DTC ON DISPLAY.
Are DTCs P0303 and P0304
displayed?
Go to step 23.
Go to step 18.
18
CHECK DTC ON DISPLAY.
Are DTC P0305 and P0306 dis-
played?
Go to step 24.
Go to step 19.
19
CHECK DTC ON DISPLAY.
Are DTC P0301, P0303 and
P0305 displayed?
Go to step 25.
Go to step 20.
20
CHECK DTC ON DISPLAY.
Are DTC P0302, P0304 and
P0306 displayed?
Go to step 26.
Go to step 27.
Step
Check
Yes
No