Infiniti QX56 (JA60). Manual - part 729

PG

PRECAUTIONS

PG-3

< PRECAUTION >

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5. When the repair work is completed, return the ignition switch to the 

″LOCK″ position before connecting

the battery cables. (At this time, the steering lock mechanism will engage.)

6. Perform a self-diagnosis check of all control units using CONSULT-III. 

Precaution for Power Generation Variable Voltage Control System

INFOID:0000000005146570

CAUTION:

For this model, the battery current sensor that is installed to the negative battery cable measures the

charging/discharging current of the battery and performs various engine controls. If an electrical com-

ponent is connected directly to the negative battery terminal, the current flowing through that compo-

nent will not be measured by the battery current sensor. This condition may cause a malfunction of

the engine control system and battery discharge may occur. Do not connect an electrical component

or ground wire directly to the battery terminal.

PG-4

< PREPARATION >

PREPARATION

PREPARATION

PREPARATION

Special Service Tool

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Commercial Service Tool

INFOID:0000000005146572

Tool number
(Kent-Moore No.)
Tool name

Description

 —
(—) Model GR-8
Multitasking Battery Diagnostic Sta-
tion

Tests batteries, starting and charging sys-
tems.
For operating instructions, refer to diagnostic 
station instruction manual.

AWIIA1239ZZ

Tool name

Description

Power tool

Loosening bolts and nuts

PBIC0190E

PG

BATTERY

PG-5

< BASIC INSPECTION >

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BASIC INSPECTION

BATTERY

How to Handle Battery

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CAUTION:

• If it becomes necessary to start the engine with a booster battery and jumper cables, use a 12-volt

booster battery.

• After connecting battery cables, ensure that they are tightly clamped to battery terminals for good

contact.

• Never add distilled water through the hole used to check specific gravity.

METHODS OF PREVENTING OVER-DISCHARGE

The following precautions must be taken to prevent over-discharging a battery.

• The battery surface (particularly its top) should always be kept

clean and dry.

• The terminal connections should be clean and tight.

• At every routine maintenance, check the electrolyte level.

This also applies to batteries designated as “low maintenance” and

“maintenance-free”.

• When the vehicle is not going to be used over a long period of

time, disconnect the battery cable from the negative terminal. (If

the vehicle has an extended storage switch, turn it off.)

• Check the charge condition of the battery.

Periodically check the specific gravity of the electrolyte. Keep a

close check on charge condition to prevent over-discharge.

CHECKING ELECTROLYTE LEVEL

WARNING:

Never allow battery fluid to come in contact with skin, eyes, fabrics, or painted surfaces. After touch-

ing a battery, never touch or rub your eyes until you have thoroughly washed your hands. If acid con-

tacts eyes, skin or clothing, immediately flush with water for 15 minutes and seek medical attention.

MEL040F

ELA0349D

MEL042F

PG-6

< BASIC INSPECTION >

BATTERY

• Remove the cell plug using a suitable tool.

• Add distilled water up to the MAX level.

Sulphation

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 voltage

and current when charging it. As shown in the figure, less cur-

rent 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.

SPECIFIC GRAVITY CHECK

1. Read hydrometer and thermometer indications at eye level.
2. Use the chart below to correct your hydrometer reading accord-

ing to electrolyte temperature.

Hydrometer Temperature Correction

MEL043F

PKIA2353E

MEL042FA

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)

0

21 (70)

−0.004

16 (60)

−0.008

10 (50)

−0.012

4 (40)

−0.016

−1 (30)

−0.020

−7 (20)

−0.024