Mitsubishi Lancer (4A9 engine). Manual - part 87

below the LOWER LEVEL indicator, there is
the danger that explosions may occur, so add
water to the battery until the electrolyte level
is between the LOWER LEVEL and UPPER
LEVEL indications.

• If too much water is added to make the level

rise above the UPPER LEVEL indication, the
electrolyte may leak out, so adjust so that the
electrolyte level is between the LOWER
LEVEL and UPPER LEVEL indications.

1. Check that the battery electrolyte level is between

the UPPER LEVEL and LOWER LEVEL
indications.

2. Use a specific gravity meter and a thermometer to

measure the specific gravity.

Standard value: 1.220

− 1.290 (electrolyte

temperature 20

°C)

Item

Standard value

Battery electrolyte specific gravity

1.220

− 1.290 (electrolyte temperature 20°C)

Battery current sensor resistance

Current sensor resistance value

between terminal No.1

−

3: 3

− 10 kΩ

between terminal No.1

−

4: less than 0.5 k

Ω

between terminal No.3

−

4: 3

− 10 kΩ

Temperature sensor resistance
value

4.5

− 7.2 kΩ (when 0 °C)

1.6

− 2.5 kΩ (when 25 °C)

0.96

− 1.40 kΩ (when 40

°C)

AC102027

Thermometer

Specific
gravity meter

BATTERY

CHASSIS ELECTRICAL

54A-12

The specific gravity of the battery electrolyte
changes according to the temperature, so the spe-
cific gravity when the electrolyte is at a temperature
of 20

°C can be calculated using the following for-

mula. Use the converted value to judge whether the
electrolyte is okay or not.

= (t

− 20) × 0.0007 + Dt

: Specific gravity converted to a value for

electrolyte temperature of 20

°C

t: Electrolyte temperature at the time of
measurement
Dt: Actual specific gravity

CHARGING

M1541001102130

CAUTION

• The battery plugs should be removed during

charging.

• The battery electrolyte level may rise and

overflow from the battery during charging.

• Explosions may occur if the battery is

brought close to naked flames during charg-
ing.

• Be careful to avoid tasks that might produce

sparks or other danger while the battery is
charging.

• After charging is complete, reinstall the bat-

tery plugs, pour water over the battery to
rinse away any sulphuric acid, and let the bat-
tery stand to dry.

• Charge the battery in a well-ventilated loca-

tion.

• Do not let the battery electrolyte temperature

rise above approximately 45

°C (approximately

°C during rapid charging).

Remove the battery from the vehicle.
1. The normal charging current is a value in

amperes which is 1/10th of the battery capacity. If
the battery needs to be charged rapidly because
of reasons such as time limitations, the maximum
charging current for rapid charging is the battery
capacity expressed as an ampere value.

Determine when charging is finished.
When the specific gravity of the battery electrolyte is
constantly within 1.220

− 1.290 for a continuous

period of one hour or more.

BATTERY TEST

M1541001202256

TEST STEPS

STEP 1. Battery no-load voltage check
(1) Illuminate the headlamp for 15 seconds.
(2) Turn off the headlamp and then leave it for about

2 minutes to stabilise the battery voltage.

(3) Remove the battery cable.
(4) Measure the battery no-load voltage.

OK: 12.4 V or more (Specific gravity
1.240)

Q: Does the measured voltage correspond with this

range?
YES :

Go to Step 3.

NO :

Go to Step 2.

STEP 2. Battery charging
Recharge the battery at 5A (constant-current charg-
ing). (Refer to Table 1.)

Q: Is the battery no-load voltage normal value (12.4 V

or more)?
YES :

Go to Step 3.

NO :

Replace the battery.

STEP 3. Load test check
(1) Connect the battery tester to battery.
(2) Feed a load current through the battery. (Refer to

Table 1).

(3) Measure the battery voltage after 15 seconds and

then eliminate a load current.

(4) Compare the measured voltage to the specified

lowest voltage. (Refer to Table 2).

Q: Is the measured voltage higher than the lowest

voltage?
YES :

The battery is normal.

NO :

Replace the battery.

Battery
type

Capacity (5-
hour rate)

Normal
charging
current

Rapid
charging
current

75D23L

53 Ah

5.3 A

53 A

55D23L

50 Ah

5.0 A

50 A

Q-85

55 Ah

5.5 A

55 A

T-105

73 Ah

7.3 A

73 A

BATTERY

CHASSIS ELECTRICAL

54A-13

(TABLE 1)

(TABLE 2)

Battery type

Charging time when fully discharged
[5A constant current charging] (H)

Load current (A)

55D23L

200

75D23L

270

Q-85

310

T-105

410

Outside air
temperature (

°C)

21 or
more

16 to 20

10 to 15

4 to 9

−1 to 3

−7 to −2

−12 to −8

−18 to −13

Minimum voltage
(V)

9.6

9.5

9.4

9.3

9.1

8.9

8.7

8.5

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