2004 SUBARU LEGACY alternator

3-12
Instruments and controls
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 lubricating 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 engine oil level. If the oil lev-
el is low, add oil immediately. If the engine oil is at the
proper level but the light remains on, contact your
nearest SUBARU dealer immediately. „
AT OIL TEMPerature warning
light (for AT vehicles)
If this light comes on when the engine is running, it
may indicate that the automatic transmission fluid tem-
perature is too hot.
If the light comes on while driving, it is unnecessary to
stop the vehicle, but avoid driving up steep grades or
in stop and go traffic. T Automatic transmission control system warn- ing
If the light flashes after the engine starts, it may indi-
cate that the automatic transmission control system is
not working properly. Contact your nearest SUBARU
dealer for service immediately.

11 - 2 6
2Maintenance 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
1) Power steering pump pulley
2) Air conditioner compressor pulley
3) 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 SUBARU dealer.
2
3 A
B
1
HSB033BB
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
*: CALIFORNIA spec models
Engine modelEJ251, EJ259 (2.5 liter)EZ30D
(3.0 liter)
Engine typeHorizontally opposed, liquid cooled 4 cyl- inder, 4 stroke gasoline engineHorizontally opposed, liquid cooled 6 cyl-inder, 4 stroke gasoline engine
Displacement cc (cu-in)2,457 (150)3,000 (183.0)
Bore × Stroke in (mm)3.92 x 3.11
(99.5 x 79.0)3.51 x 3.15
(89.2 x 80.0)
Compression ratio10.0 : 110.7 : 1
Firing order1 – 3 – 2 – 41 – 6 – 3 – 2 – 5 – 4
Battery type and capacity2.5 literMT55D23L
AT75D23L
3.0 liter75D23L
Alternator2.5 liter12V-90A
3.0 liter12V-100A
Spark plugs2.5 literRC10YC4 (Champion)
BKR6E-11 (NGK)
BKR5E-11 (NGK)
FR5AP-11 (NGK)*
3.0 literPLFR6A-11 (NGK)

12-9
Specifications
– CONTINUED –
„Fuse panel located in the engine com- partment
T 2.5 liter models
A) FWD socket (without SPORTSHIFT mode)
B) Main fuse
A
B
1
2
3 45 6 7 8 9 10 11 12
UBC003BB
Fuse panelFuse ratingCircuit
120Ay
Radiator cooling fan (Main)
220AyRadiator cooling fan (Sub)
330AyABS motor
420AyRear window defogger
515AyHazard warning flasher
y Horn
615AyMeter
y SRS airbag system
warning light
710AyAutomatic transmis-
sion control unit
y ABS UNIT
810AyAlternator
915AyHeadlight (right side)
1015AyHeadlight (left side)
1120AyLighting switch

12-11
Specifications
– CONTINUED –
Fuse panelFuse ratingCircuit
130AyRadiator cooling fan (Main)
230AyRadiator cooling fan (Sub)
330A 50AyABS motor
y VDC motor
430AyMcIntosh audio amp (if
equipped)
520AyRear window defogger
615AyHazard warning flasher
y Horn
715AyMeter
y SRS airbag system warning light
810AyAutomatic transmis- sion control unit
y ABS UNIT
910AyAlternator
1015AyHeadlight (right side)
1115AyHeadlight (left side)
1220AyLighting switch
1315AyClock
y Interior light
Fuse panelFuse ratingCircuit