2005 SUBARU LEGACY alternator

3-26
Instruments and controls
NOTE
This light also comes on when the fuel filler cap is
not tightened until it clicks.
If you have recently refueled your vehicle, the cause of
the CHECK ENGINE warning light/malfunction indica-
tor lamp coming on could be a loose or missing fuel fill-
er cap. Remove the cap and retighten it until it clicks.
Make sure nothing is interfering with the sealing of the
cap. Tightening the cap will not make the CHECK EN-
GINE warning light turn off immediately. It may take
several driving trips. If the light does not go out, take
your vehicle to your authorized SUBARU dealer im-
mediately. !
If the light is blinking:
If the light is blinking while driving, an engine misfire
condition has been detected which may damage the
emission control system.
To prevent serious damage to the emission control
system, you should do the following:" Reduce vehicle speed.
" Avoid hard acceleration.
" Avoid steep uphill grades.
" Reduce the amount of cargo, if possible.
" Stop towing a trailer as soon as possible.
The CHECK ENGINE warning light may stop blinking and come on steadily after several driving trips. You
should have your vehicle checked by an authorized
SUBARU dealer immediately. !
Charge warning light
If this light comes on when the engine is running, it
may indicate that the charging system is not working
properly.
If the light comes on while driving or does not go out
after the engine starts, stop the engine at the first safe
opportunity and check the alternator belt. If the belt is
loose, broken or if the belt is in good condition but the
light remains on, contact your nearest SUBARU deal-
er immediately. ! Oil pressure warning light
Do not operate the engine with the oil pressure
warning light on. This may cause serious en-
gine damage.
If this light comes on when the engine is running, it
may indicate that the engine oil pressure is low and the

11 - 3 0
Maintenance and service
Drive belts
The alternator, power steering pump, and air condi-
tioner compressor depend on drive belts. Satisfactory
performance requires that belt tension be correct. !
2.5-liter models
A) Power steering pump pulley
B) Air conditioner compressor pulley
C) Crank pulley in (mm)
To check belt tension, place a straightedge (ruler)
across two adjacent pulleys and apply a force of 22 lbs
(98 N, 10 kg) midway between the pulleys by using a
spring scale. Belt deflection should be the amount
specified. ! 3.0-liter models
It is unnecessary to check belt tension periodically be-
cause your engine is equipped with an automatic belt
tension adjuster. However, replacement of the belt
should be done according to the maintenance sched-
ule in the “Warranty and Maintenance Booklet”. Con-
sult your SUBARU dealer for replacement.
If a belt is loose, cracked, or worn, contact your SUB-
ARU dealer.
B
C a
b
A
HSB033BC
Deflection
New belt Used belt
a 0.28 – 0.35 (7.0 – 9.0) 0.35 – 0.43 (9.0 – 11.0)
b 0.30 – 0.33 (7.5 – 8.5) 0.35 – 0.40 (9.0 – 10.0)

12-3
Specifications
– CONTINUED –
!Engine
! Electrical system
Engine modelEJ253
(2.5-liter, SOHC, non-turbo)EJ255
(2.5-liter, DOHC, turbo)EZ30D
(3.0-liter, DOHC, non-turbo)
Engine typeHorizontally opposed, liquid cooled 4 cylinder, 4 stroke gasoline engineHorizontally opposed, liquid cooled
6 cylinder, 4 stroke gasoline engine
Displacement cu-in (cc)150 (2,457)183 (3,000)
Bore × Stroke in (mm)3.92 × 3.11 (99.5 × 79.0)3.51 × 3.15 (89.2 × 80.0)
Compression ratio10.0 : 18.2 : 110.7 : 1
Firing order1 – 3 – 2 – 41 – 6 – 3 – 2 – 5 – 4
Battery type and capacity (5HR)2.5-liter modelsMT55D23L (12V-48AH)
AT75D23L (12V-52AH)
3.0-liter models75D23L (12V-52AH)
Alternator2.5-liter models12V-110A
3.0-liter models12V-100A
Spark plugs2.5-liter non-turbo modelsFR5AP-11 (NGK)
2.5-liter turbo modelsILFR6B (NGK)
3.0-liter modelsILFR6B (NGK)

12-9
Specifications
– CONTINUED –
Fuse panelFuse ratingCircuit
130"ABS unit
" Vehicle dynamics con- trol unit
225"Main fan
325"Sub fan (Except 3.0-li- ter models)
425"Main fan (3.0-liter mod- els)
520
615"Headlight (right side)
715"Headlight (left side)
820"Backup light
915"Horn
1025"Rear window defogger
1115"Fuel pump
1215"Automatic transmis- sion control unit
137.5"Engine control unit
1415"Turn and hazard warn-
ing flasher
1520"Parking switch
167.5"Alternator
Fuse panelFuse ratingCircuit