charging INFINITI QX56 2011 Factory Workshop Manual

PCS
SYSTEMPCS-37
< SYSTEM DESCRIPTION > [POWER DISTRIBUTION SYSTEM]
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SYSTEM
POWER DISTRIBUTION SYSTEM
POWER DISTRIBUTION SYSTEM : System DiagramINFOID:0000000006220196
POWER DISTRIBUTION SYST
EM : System DescriptionINFOID:0000000006220197
SYSTEM DESCRIPTION
 PDS (POWER DISTRIBUTION SYSTEM) is the system that BCM controls with the operation of the push-
button ignition switch and performs the power distributi on to each power circuit. This system is used instead
of the mechanical power supply changing mechanism wit h the operation of the conventional key cylinder.
 The push-button ignition switch can be operated when Intelligent Key is in the following condition. Refer to Engine Start Function for details.
- Intelligent Key is in the detection area of the inside key antenna.
- Intelligent Key backside is contact ed to push-button ignition switch.
 The push-button ignition switch operation is input to BCM as a signal. BCM changes the power supply posi-
tion according to the status and operates the follo wing relays to supply power to each power circuit.
- Ignition relay (inside IPDM E/R)
- Ignition relay-1
- ACC relay
- Blower relay
NOTE:
The engine switch operation changes due to the conditions of brake pedal, selector lever and vehicle speed.
 The power supply position can be confirmed with the light ing of the indicators near the push-button ignition
switch.
BATTERY SAVER SYSTEM
When all the following conditions are met for 60 minutes, the battery saver system will cut off the power supply
to prevent battery discharge.
 The ignition switch is in the ACC position
 All doors are closed
 Selector lever is in the P position
Reset Condition of Battery Saver System
In order to prevent the battery from discharging, the battery saver system will cut off the power supply when all
doors are closed, the selector lever is on P position and t he ignition switch is left on ACC position for 1 hour. If
any of the following conditions are met the battery saver system is released and the steering will change auto-
matically to lock position from OFF position.
 Opening any door
 Operating with door request switch on door lock
 Operating with Intelligent Key on door lock
Press push-button ignition switch and ignition swit ch will change to ACC position from OFF position.
JMMIA0444GB
Revision: 2010 May2011 QX56

PG
BATTERY INSPECTIONPG-159
< BASIC INSPECTION >
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BASIC INSPECTION
BATTERY INSPECTION
How to Handle BatteryINFOID:0000000006288754
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 gr avity 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, imme diately flush with water for 15 minutes and seek medical attention.
MEL040F
ELA0349D
MEL042F
Revision: 2010 May2011 QX56

PG-160
< BASIC INSPECTION >
BATTERY INSPECTION
 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
Revision: 2010 May2011 QX56

PG
BATTERY INSPECTIONPG-161
< BASIC INSPECTION >
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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 automat ically decrease as the battery charges. This indi-
cates that the voltage of the battery is increasing norma lly 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 ce lls varies more than 0.050, the battery should be replaced.
Work FlowINFOID:0000000006288755
TROUBLE DIAGNOSIS WITH BATTERY SERVICE CENTER
For battery testing, use Battery Service Center (J-48087) . For details and operating instructions, refer to Tech-
nical Service Bulletin and/or Battery Service Center User Guide.
− 12 (10) −0.028
− 18 (0) −0.032
Battery electrolyte temperature [
°C ( °F)] Add to specific gravity reading
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 discharged1.110 - 1.130 Completely discharged
Amps Time 50 1 hour
25 2 hours
10 5 hours5 10 hours
Revision: 2010 May2011 QX56

RAX-14
< REMOVAL AND INSTALLATION >
REAR DRIVE SHAFT
9. Install the boot securely into grooves (indicated by “*” marks)shown in the figure.
CAUTION:
If grease adheres to the boot mounting surface (indicated
by “*” mark) on the shaft or housing, boot may come off.
Remove all grease from the surfaces.
10. To prevent the deformation of the boot, adjust the boot installa- tion length (L) to the specified value shown below by inserting
the suitable tool into inside of the boot from the large diameter
side of boot and discharging the inside air.
CAUTION:
 If the boot installation length is outsid e the standard, it may cause breakage of boot.
 Be careful not to touch the inside of the boot with the tip of tool.
11. Install new boot bands securely. CAUTION:
Never reuse boot band.
a. Small boot band
i. Secure the ends of the boot with boot bands using the boot band crimping tool [SST: KV40107300 ( −)] (A).
CAUTION:
Secure boot band so that dimension (M) meets the specifi-
cation as shown in the figure.
b. Large boot band
i. Put boot band in the groove on drive shaft boot. Then fit pawls ( ) into holes to temporary installation.
NOTE:
For the large diameter side, fit projection (A) and guide slit (B) at
first.L: Refer to
RAX-18, "
Drive Shaft".
JPDIG0136ZZ
PDIA1187J
M : 1.0 – 4.0 mm (0.039 – 0.157 in)
DSF0047D
SDIA3557E
Revision: 2010 May2011 QX56

RAX-16
< REMOVAL AND INSTALLATION >
REAR DRIVE SHAFT
2. Install boot and boot bands to shaft.CAUTION:
 Wrap serration on shaft with tape (A) to protect the bootfrom damage.
 Never reuse boot and boot band.
3. Remove the tape wrapped around the serration on shaft.
4. Install ball cage/steel ball/inner race assembly (1), align it with the matching marks on shaft (2) put during the removal.
5. Secure ball cage/steel ball/inner race assembly onto shaft with snap ring (3).
CAUTION:
Never reuse snap ring.
6. Apply the appropriate amount of grease onto housing and slid- ing surface.
7. Install stopper ring to housing. CAUTION:
Never reuse stopper ring.
8. After installed, pull shaft to check engagement between housing and stopper ring.
9. Install boot securely into grooves (indicated by “*” marks) shown in the figure.
CAUTION:
If grease adheres to the boot mounting surfaces (indicated
by “*” marks) on shaft or housing, boot may be removed.
Remove all grease from the surfaces.
10. To prevent deformation of the boot, adjust the boot installation
length (L) to the value shown below by inserting the suitable tool
into the inside of boot from the large diameter side of boot and
discharging inside air.
CAUTION:
 If the boot installation length is outsid e the standard, it may cause breakage of boot.
 Be careful not to touch the inside of the boot with the tip of tool.
11. Install boot bands securely as shown in the figure. CAUTION:
Never reuse boot band.
12. Secure housing and shaft, and then check that they are in the correct position when rotating boot. Install them with boot band
when the mounting positi ons become incorrect.
CAUTION:
Never reuse boot band.
InspectionINFOID:0000000006225472
INSPECTION AFTER REMOVAL
JPDIF0009ZZ
Grease amount : Refer to RAX-18, "Drive Shaft".
L: Refer to RAX-18, "
Drive Shaft".
JPDIG0004ZZ
JPDIG0137ZZ
PDIA1188J
Revision: 2010 May2011 QX56

DESCRIPTIONSCS-49
< SYSTEM DESCRIPTION > [AIR LEVELIZER CONTROL SYSTEM]
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SYSTEM DESCRIPTION
DESCRIPTION
DescriptionINFOID:0000000006256039
 Corrects sinkage of vehicle rear that occurs in laden or towing conditions.
 Maintains vehicle height at a constant level and improv es riding comfort by charging or discharging air in air
chamber of rear shock absorber, according to signal from vehicle height sensor installed to rear suspension.
Revision: 2010 May2011 QX56

STR-4
< PREPARATION >
PREPARATION
PREPARATION
PREPARATION
Special Service ToolsINFOID:0000000006275531
Commercial Service ToolsINFOID:0000000006275532
Tool number
(Kent-Moore No.) Tool name Description
—
(J-44373 Model MCR620)
Starting/Charging System Tester Tests starting and charging systems.
For operating instructio
ns, refer to Technical
Service Bulletin.
SEL403X
Tool name Description
Power tool Loosening bolts, nuts and screws
PIIB1407E
Revision: 2010 May2011 QX56

STR-12
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
NOTE:
To ensure a complete and thorough diagnosis, the battery, starter motor and alternator test segments must be
done as a set from start to finish.
1.DIAGNOSIS WITH STARTING /CHARGING SYSTEM TESTER
Perform the starting system test with Starting/Char ging System Tester (SST: J-44373). For details and operat-
ing instructions, refer to Technical Service Bulletin.
Te s t r e s u l t
CRANKING VOLTAGE NORMAL>>GO TO 2.
CRANKING VOLTAGE LOW>>GO TO 5.
CHARGE BATTERY>>Perform the slow battery charging procedure. (Initial rate of charge is 10A for 12
hours.) Perform battery test again. Re fer to Technical Service Bulletin.
REPLACE BATTERY>>Before replacing battery, clean t he battery cable clamps and battery posts. Perform
battery test again. Refer to Technical Service Bu lletin. If second test result is “REPLACE BAT-
TERY”, then do so. Perform battery test again to confirm repair.
2.CRANKING CHECK
Check that the starter motor operates correctly.
Does the engine crank normally?
YES >> GO TO 3.
NO >> GO TO 4.
3.ENGINE START CHECK
Check that the engine starts.
Does the engine start?
YES >> Starter motor is OK. INSPECTION END
NO >> Perform further diagnosis of engine mechanical or engine control system. Refer EM and EC sec-
tions. Once resolved, perform battery test again.
4.STARTER MOTOR ACTIVATION
Check that the starter motor operates.
Does the starter motor turn?
YES >> Check ring gear and starter motor drive pinion. Once resolved, perform battery test again.
NO >> GO TO 7.
5.COMPARISON BETWEEN ENGINE COOLANT AND CRANKING VOLTAGE
Compare the engine coolant temperature and the cranking voltage with the specifications.
Minimum Specification of Cranking Voltage Referencing Coolant Temperature
Is the voltage less than the specified value?
YES >> GO TO 7.
NO >> GO TO 6.
6.STARTER OPERATION
Check the starter operation status.
Does the starter motor turn smoothly?
YES >> Starter motor is OK. INSPECTION END
NO >> GO TO 7.
7.“B” TERMINAL CIRCUIT INSPECTION
Check “B” terminal circuit. Refer to STR-14, "
Diagnosis Procedure".
Is
“B” terminal circuit normal?
Engine coolant temperature [ °C ( °F)] Voltage [V]
− 30 to −20 ( −22 to −4) 8.6
− 19 to −10 ( −2 to 14) 9.1
− 9 to 0 (16 to 32) 9.5
More than 1 (More than 34) 9.9
Revision: 2010 May2011 QX56

PREPARATIONTM-9
< PREPARATION > [7AT: RE7R01B]
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Commercial Service ToolINFOID:0000000006226737
*: Always check with the Parts Department for the latest parts information. Tool name
Description
Power tool Loosening bolts and nuts
Drift
a: 22 mm (0.87 in) dia. Installing manual shaft oil seals
Drift
a: 64 mm (2.52 in) dia. Installing rear oil seal (4WD)
Pin punch
a: 4 mm (0.16 in) dia. Remove retaining pin
1. 315268E000* O-ring
2. 310811EA5A*
Charging pipe A/T fluid changing and adjustment
PBIC0190E
NT083
SCIA5338E
NT410
JSDIA1332ZZ
Revision: 2010 May2011 QX56