Subaru Legacy 2005 Service Manual page 1620

MECHANICAL
29.Engine Trouble in General
A: INSPECTION
NOTE:
"RANK" shown in the chart refers to the possibility of the cause of trouble in order ("Very often" to "Rarely")
A — Very often
B — Sometimes
C — Rarely
Symptom
1. Engine does not start.
1) Starter does not turn.
2) Initial combustion does
not occur.
Engine Trouble in General
Problem parts, etc.
Starter
Battery
Friction
Starter
Engine control system <Ref. to EN(H6DO)(diag)-2, Basic Diagnostic Procedure.>
Fuel line
Chain
Compression
ME(H6DO)-86
Possible cause
Defective battery-to-starter harness
Defective starter switch
Defective inhibitor switch or neutral position switch
Defective starter
Poor terminal connection
Run-down battery
Defective charging system
Seizure of crankshaft and connecting rod bearing
Seized camshaft
Seized or stuck piston and cylinder
Defective starter
Defective fuel pump and relay
Lack of or insufficient fuel
Trouble
Defective timing
Incorrect valve clearance
Loosened spark plug or defective gasket
Loosened cylinder head bolt or defective gasket
Improper valve sealing
Defective valve stem
Worn or broken valve spring
Worn or stuck piston rings, cylinder and piston
Incorrect valve timing
Improper engine oil (low viscosity)
Trouble of tappet
Trouble of tappet. In case noise occurs with valve mov-
ing. Or the harness involved to oil switching solenoid
valve, variable valve lift diagnosis oil pressure switch
and variable valve lift has trouble in a past.
Rank
B
C
C
B
A
A
B
C
C
C
C
A
A
B
B
B
C
C
C
C
C
B
C
B
B
C
B