Infiniti G20 (P11). Manual - part 516

MEL043F

Remove the cell plug using a suitable tool.

Add distilled water up to the MAX level.

SEL709E

Sulphation

NCSC0003S0201

A battery will be completely discharged if it is left unattended
for a long time and the specific gravity will become less than
1.100. This may result in sulphation on the cell plates.
To determine if a battery has been “sulphated”, note its volt-
age and current when charging it. As shown in the figure, less
current and higher voltage are observed in the initial stage of
charging sulphated batteries.
A sulphated battery may sometimes be brought back into ser-
vice by means of a long, slow charge, 12 hours or more, fol-
lowed by a battery capacity test.

MEL042FA

SPECIFIC GRAVITY CHECK

NCSC0003S03

Read hydrometer and thermometer indications at eye level.

Use the chart below to correct your hydrometer reading
according to electrolyte temperature.

Hydrometer Temperature Correction

NCSC0003S0301

Battery electrolyte temperature °C (°F)

Add to specific gravity reading

71 (160)

0.032

66 (150)

0.028

60 (140)

0.024

54 (130)

0.020

49 (120)

0.016

43 (110)

0.012

38 (100)

0.008

32 (90)

0.004

27 (80)

21 (70)

−0.004

16 (60)

−0.008

10 (50)

−0.012

IDX

BATTERY

How to Handle Battery (Cont’d)

SC-5

Battery electrolyte temperature °C (°F)

Add to specific gravity reading

4 (40)

−0.016

−1 (30)

−0.020

−7 (20)

−0.024

−12 (10)

−0.028

−18 (0)

−0.032

Corrected specific gravity

Approximate charge condition

1.260 - 1.280

Fully charged

1.230 - 1.250

3/4 charged

1.200 - 1.220

1/2 charged

1.170 - 1.190

1/4 charged

1.140 - 1.160

Almost discharged

1.110 - 1.130

Completely discharged

CHARGING THE BATTERY

NCSC0003S04

CAUTION:

Do not “quick charge” a fully discharged battery.

Keep the battery away from open flame while it is being
charged.

When connecting the charger, connect the leads first, then
turn on the charger. Do not turn on the charger first, as
this may cause a spark.

If battery electrolyte temperature rises above 60°C (140°F),
stop charging. Always charge battery at a temperature
below 60°C (140°F).

Charging Rates

NCSC0003S0401

Amps

Time

1 hour

2 hours

5 hours

10 hours

Do not charge at more than 50 ampere rate.
NOTE:
The ammeter reading on your battery charger will automatically
decrease as the battery charges. This indicates that the voltage of
the battery is increasing normally as the state of charge improves.
The charging amps indicated above refer to initial charge rate.

If, after charging, the specific gravity of any two cells varies
more than .050, the battery should be replaced.

BATTERY

How to Handle Battery (Cont’d)

SC-6

Trouble Diagnoses with
Battery/Starting/Charging System Tester

NCSC0018

CAUTION:

When working with batteries, always wear appropriate eye
protection.
NOTE:

To ensure a complete and thorough diagnosis, the battery,
starter and alternator test segments must be done as a set
from start to finish.

If battery surface charge is detected while testing, the tester
will prompt you to turn on the headlights to remove the surface
charge.

If necessary, the tester will prompt you to determine if the bat-
tery temperature is above or below 0°C (32°F). Choose the
appropriate selection by pressing the up or down arrow button,
then press “ENTER” to make the selection.

SEL404X

Turn off all loads on the vehicle electrical system. Clean or
repair as necessary.

Visually inspect the battery, battery terminals and cable ends
with ignition switch in “OFF” position.

NOTE:
The contact surface between the battery terminals, cable ends and
tester leads must be clean for a valid test. A poor connection will
prevent testing and a “CHECK CONNECTION” message will
appear during the test procedures. If this occurs, clean the battery
post and terminals, reconnect them and restart the test.
3.

Connect the red tester lead clamp to the positive battery
terminal, and the black to the negative terminal.

SEL405X

The tester will turn on automatically. Using the arrow keys,
select “IN VEHICLE” on the tester and then press the “ENTER”
key.

IDX

BATTERY

Trouble Diagnoses with Battery/Starting/Charging System Tester

SC-7

SEL406X

Locate the battery type and rating stamped or written on the
top case of the battery to be tested.

NOTE:
The battery type and rating will have either of the following.

CCA: Cold Cranking Amps (490 CCA, 550 CCA, etc.)
JIS: Japanese Industrial Standard.
Battery is stamped with a number such as:
80D26L: 80 (rank of output), D (physical size-depth), 26 (width
in cm). The last character L (post configuration) is not input into
the tester.
The tester requires the rating for the battery be entered exactly
as it is written or stamped on the battery. Do not attempt a CCA
conversion for JIS stamped batteries. JIS must be input
directly.

Using the arrow and “ENTER” keys alternately, select the bat-
tery type and rating.

NOTE:
The tester lists five choices; CCA, JIS, IEC, DIN, and EN. Only use
CCA or JIS.

SEL407X

Press “ENTER” to begin the test. Diagnosis results are dis-
played on the tester. Refer to “DIAGNOSTIC RESULT ITEM
CHART” SC-9.

SEL576X

Press “ENTER”, then test output code is displayed. Record the
test output code on the repair order.

Toggle back to the “DIAGNOSTIC SCREEN” for test results.

NOTE:

If necessary, the tester will ask the user to determine if the
battery has just been charged. Choose the appropriate selec-
tion by pressing the up or down arrow button and then press
the “ENTER” button to make the selection.

When testing a battery installed in a vehicle that has recently
been driven, select “BEFORE CHANGE”.

If the battery has just been slow charged due to a “CHARGE
& RETEST” decision by the tester, and the tester asks the user
“BEFORE

CHARGE/AFTER

CHARGE”,

select

“AFTER

CHARGE”.

BATTERY

Trouble Diagnoses with Battery/Starting/Charging System Tester (Cont’d)

SC-8

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