Infiniti Q45. Manual — part 790
BATTERY
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●
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
SC-6
BATTERY
CHARGING THE BATTERY
CAUTION:
●
Never “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. Never turn on the
charger first, as this may cause a spark.
●
If battery electrolyte temperature rises above 55
°
C (131
°
F), stop charging. Always charge battery
at a temperature below 55
°
C (131
°
F).
Charging Rates
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 indi-
cates 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 0.050, the battery should be
replaced.
Trouble Diagnosis with Battery/Starting/Charging System Tester
NKS0016L
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 headlamps to
remove the surface charge.
●
If necessary, the tester will prompt you to determine if the battery 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.
−
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
Battery electrolyte temperature
°
C (
°
F)
Add to specific gravity reading
Amps
Time
50
1 hour
25
2 hours
10
5 hours
5
10 hours
BATTERY
SC-7
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1.
Turn off all loads on the vehicle electrical system. Clean or repair
as necessary.
2.
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 connec-
tion will prevent testing and a “CHECK CONNECTION” mes-
sage 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 termi-
nal, and the black to the negative terminal.
4.
The tester will turn on automatically. Using the arrow keys,
select “IN-VEHICLE” on the tester and then press the “ENTER”
key.
5.
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.
6.
Using the arrow and “ENTER” keys alternately, select the battery type and rating.
NOTE:
The tester lists five choices; CCA, JIS, IEC, DIN, and EN. Only use CCA or JIS.
7.
Press “ENTER” to begin the test. Diagnosis results are dis-
played on the tester. Refer to
.
SEL404X
SEL405X
SEL406X
SEL407X
SC-8
BATTERY
8.
Press “ENTER”, then test output code is displayed. Record the
test output code on the repair order.
9.
Toggle back to the “DIAGNOSTIC SCREEN” for test results.
NOTE:
●
If necessary, the tester will ask the user to determine if the bat-
tery has just been charged. Choose the appropriate selection 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”.
DIAGNOSTIC RESULT ITEM CHART
Removal and Installation
NKS0016M
Observe the following to ensure proper servicing.
CAUTION:
●
When disconnecting, disconnect the battery cable from the
negative terminal first. But when connecting, connect the
battery cable to the positive terminal first.
●
Tighten parts to the specified torque shown below.
SEL576X
Diagnostic item
Service procedure
GOOD BATTERY
Battery is OK, go to “Trouble Diagnosis”, “STARTING SYSTEM”. Refer to
SC-11, "Trouble Diagnosis with
Battery/Starting/Charging System Tester"
REPLACE BATTERY
Replace battery.
Before replacing battery, clean the battery cable clamps and battery posts. Perform battery test again with
Battery/Starting/Charging system tester. If second test result is “Replace Battery”, then do so. Perform bat-
tery test again to confirm repair.
BAD CELL-REPLACE
Replace the battery. Perform battery test again with Battery/Starting/Charging system tester to confirm
repair.
GOOD-RECHARGE
Perform the slow battery charging procedure. (Initial rate of charge is 10 A for 12 hours.) Perform battery
test again with Battery/Starting/Charging system tester.
CHARGE & RETEST
Perform the slow battery charging. (Initial rate of charge is 10 A for 12 hours.)
Perform battery test again with Battery/Starting/Charging system tester to confirm repair.
NOTE:
If the tester asks the user “BEFORE CHARGE/AFTER CHARGE”, select “AFTER CHARGE”.
Battery fix frame mounting nut:
: 4.4 N·m (0.45 kg-m, 39 in-lb)
Battery terminal nut:
: 4.0 N·m (0.41 kg-m, 35 in-lb)
PKIA2352E
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