Battery - Subaru Legacy 2005 Service Manual

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STARTING/CHARGING SYSTEMS

4. Battery

A: REMOVAL
1) Disconnect the positive (+) terminal after discon-
necting the negative (−) terminal of battery.
2) Remove the battery cable holder from battery
rod.
3) Remove the flange nuts from battery rods and
take off battery holder.
4) Remove the battery.
B: INSTALLATION
Install in the reverse order of removal.
Tightening torque:
3.4 N
m (0.35 kgf-m, 2.5 ft-lb)
NOTE:
• Clean the battery cable terminals and apply
grease to retard the formation of corrosion.
• Connect the positive (+) terminal, and then con-
nect the negative (−) terminal of battery.
• Initial diagnosis of electronic throttle control is
performed after battery installation. For this reason,
start the engine after 10 seconds or more have
elapsed since the ignition switch was turned to ON.
C: INSPECTION
WARNING:
• Electrolyte has toxicity; be careful of han-
dling the fluid.
• Avoid contact with skin, eyes or clothing. Es-
pecially at contact with eyes, flush with water
for 15 minutes and get prompt medical atten-
tion.
• Batteries produce explosive gases. Keep
sparks, flame, cigarettes away.
• Ventilate when charging or using in enclosed
space.
• For safety, in case an explosion does occur,
wear eye protection or shield your eyes when
working near any battery. Never lean over a bat-
tery.
• Do not let battery fluid contact eyes, skin,
fabrics, or paint-work because battery fluid is
corrosive acid.
Battery
• To lessen the risk of sparks, remove rings,
metal watch-bands, and other metal jewelry.
Never allow metal tools to contact the positive
battery terminal and anything connected to it
while you are at the same time in contact with
any other metallic portion of the vehicle. This
may cause short circuit.
1. EXTERNAL PARTS
Check the battery case, top cover, vent plugs, and
terminal posts for dirt or cracks. If necessary, clean
with water and wipe with a dry cloth.
Apply a thin coat of grease on the terminal posts to
prevent corrosion.
2. ELECTROLYTE LEVEL
Check the electrolyte level in each cell. If the level
is below MIN level, bring the level to MAX level by
pouring distilled water into the battery cell. Do not
fill beyond MAX level.
SC-00180
3. SPECIFIC GRAVITY OF ELECTROLYTE
1) Measure specific gravity of electrolyte using a
hydrometer and a thermometer.
Specific gravity varies with temperature of electro-
lyte so that it must be corrected at 20°C (68°F) us-
ing the following equation:
S
= St + 0.0007
20
S
20
temperature of 20
St: Measured specific gravity
t: Measured temperature (
Determine whether or not battery must be
charged, according to corrected specific
gravity.
Standard specific gravity: 1.220 — 1.290
[20
2) Measuring the specific gravity of the electrolyte
in the battery will disclose the state of charge of the
battery. The relation between specific gravity and
state of charge is as shown in the figure.
SC(H4SO 2.0)-20
×
(t
20)
: Specific gravity corrected at electrolyte
°
°
C (68
°
°
C (68
F)
Battery with standard specific gravity 1,280 (20 C)
1.28
1.24
1.22
1.20
1.16
1.12
1.08
1.04
10
20
30
40
50
0
Amount of discharge (%)
F)
°
C)
60
70
80
90 100
SC-00054

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