ECU INFINITI QX56 2006 Factory Service Manual

FAX-12
DRIVE SHAFT
Revision: November 20092006 QX56
4. Attach the circlip to the drive shaft making sure circlip fits
securely into groove on drive shaft. Then install drive shaft nut to
end of joint sub-assembly, and press-fit the circlip using a suit-
able tool as shown.
NOTE:
Discard the old circlip and use a new one for assembly.
5. Insert the specified quantity of Genuine NISSAN Grease or equivalent, into the joint sub-assembly and the large end of the
boot. Refer to MA-11, "
RECOMMENDED FLUIDS AND LUBRI-
CANTS" .
6. Install the boot securely into the grooves (indicated by the * marks) as shown.
CAUTION:
If there is grease on the boot mounting surfaces (indicated
by the * marks) of the drive shaft and joint sub-assembly,
the boot may come off. Remove all grease from the drive
shaft surfaces.
7. Check that the boot installation length “L” is the specified length. Insert a suitable tool into the large end of the boot, as shown.
Bleed the air from the boot to prevent boot deformation.
CAUTION:

The boot may break if the boot installation length is less than the specified length.

Do not contact inside surface of boot with the tip of the suitable tool.
8. Secure large and small ends of the boot using new boot bands using tool as shown.
NOTE:
Discard the old boot bands and use new ones for assembly.

Secure boot band so that dimension "M" meets specification
as shown.
9. After installing the housing to the shaft, rotate the boot to check that it is positioned correctly. If the boot is not positioned correctly, remove the old boot bands then reposition the boot and secure the boot with new
boot bands. Grease capacity : 145
− 165 g (5.11 − 5.82 oz)
RAC0049D
Boot installation length “L” : 168.4 mm (6.63 in)
Tool number : KV40107300 ( — )WDIA0288E
RAC1133D
Dimension "M" : 1.0 – 4.0 mm (0.039 – 0.157 in)
DSF0047D

FRONT FINAL DRIVE ASSEMBLYFFD-29
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FFD
Revision: November 2009 2006 QX56
10. Install side bearing adjusters into gear carrier.
11. Apply differential gear oil to the side bearings, and install the dif-
ferential case assembly with the side bearing outer races into
the gear carrier.
CAUTION:
Do not reuse side bearing outer race when replacing side
bearing inner race (replace as a set).
12. Install the side bearing caps with the matching marks aligned. NOTE:
Do not tighten at this step. This allows further tightening of side
bearing adjusters.
13. Tighten each side bearing adjuster alternately turning drive gear.
14. Check and adjust tooth contact, backlash, drive gear runout and total preload torque. Refer to FFD-16,
"Tooth Contact" , FFD-17, "Backlash" , FFD-15, "Drive Gear Runout" and FFD-15, "Total Preload Torque"
.
Recheck above items.

After adjusting tooth contact and backlash secure side bear-
ing adjuster with screws and tighten side bearing cap bolt to
the specified torque. Refer to FFD-14, "
COMPONENTS" .
15. Apply multi-purpose grease to the lips of the new side oil seal. Then drive the new side oil seal in evenly to the gear carrier using suitable tool.
CAUTION:

Do not reuse side oil seal.

Do not incline the new side oil seal when installing.
SPD527
PDIA0700E
SDIA2265E
SDIA2263E

FL-4Revision: November 2009
FUEL SYSTEM
2006 QX56
FUEL SYSTEMPFP:17503
Checking Fuel LinesEBS00M3Q
Inspect fuel lines, fuel filler cap and fuel tank for improper attach-
ment, leaks, cracks, damage, loose connections, chafing or deterio-
ration.
If necessary, repair or replace damaged parts.
General PrecautionsEBS00M3R
WARNING:
When replacing fuel line parts, be sure to observe the following.

Put a “CAUTION: INFLAMMABLE” sign in the workshop.

Be sure to work in a well ventilated area and furnish workshop with a CO2 fire extinguisher.

Do not smoke while servicing fuel system. Keep open flames and sparks away from the work area.
CAUTION:

Before removing fuel line parts, carry out the following procedures:
–Put drained fuel in an explosion-proof container and put the lid on securely. Keep the container in
safe area.
–Release fuel pressure from the fuel lines. Refer to EC-80, "FUEL PRESSURE RELEASE" .
–Disconnect the battery negative terminal.

Always replace O-rings and clamps with new ones.

Do not kink or twist hoses when they are being installed.

Do not tighten hose clamps excessively to avoid damaging
hoses.
Tighten high-pressure rubber hose clamp so that clamp
end is 3 mm (0.12 in) from hose end.
Tightening torque specifications are the same for all rubber
hose clamps.
Check that the screw does not contact adjacent parts.
SMA803A
MMA104A

FUEL SYSTEMFL-5
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After connecting the fuel tube quick connectors, make sure
the quick connectors are secure.
Ensure that the connector and resin tube do not contact
any adjacent parts.

After installing tubes, make sure there is no fuel leakage at
connections in the following steps.
–Apply fuel pressure to fuel lines with turning ignition switch
ON (with engine stopped). Then check for fuel leaks at con-
nections.
–Start the engine and rev it up and check for fuel leaks at
connections.

Use only a Genuine NISSAN fuel filler cap as a replacement.
If an incorrect fuel filler cap is used, the MIL may come on.

For servicing “Evaporative Emission System” parts, refer to
EC-32, "
EVAPORATIVE EMISSION SYSTEM" .

For servicing “On Board Refueling Vapor Recovery
(ORVR)” parts, refer to EC-39, "
ON BOARD REFUELING
VAPOR RECOVERY (ORVR)" .
PBIC1268E

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLYFL-9
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Revision: November 2009 2006 QX56
12. Remove the lock ring using Tool.
13. Remove the fuel level sensor, fuel filter, and fuel pump assem-
bly. Remove and discard the fuel level sensor, fuel filter, and fuel
pump assembly O-ring.
CAUTION:

Do not bend the float arm during removal.

Avoid impacts such as dropping when handling the com-
ponents.
INSTALLATION
Installation is in the reverse order of removal.

For installation, use a new fuel level sensor, fuel filter, and fuel pump assembly O-ring.

Connect the quick connector as follows:
–Check the connection for any damage or foreign materials.
–Align the connector with the pipe, then insert the connector straight into the pipe until a click is heard.
–After connecting the quick connector, make sure that the con-
nection is secure by checking as follows:
–Pull the tube and the connector to make sure they are securely
connected.
–Visually inspect the connector to make sure the two retainer tabs
are securely connected.
INSPECTION AFTER INSTALLATION
1. Turn the ignition switch ON but do not start engine, then check the fuel pipes and hose connections forleaks while applying fuel pressure to the system.
2. Start the engine and rev it above idle speed, then check that there are no fuel leaks at any of the fuel pipe and hose connections.Tool number : — (J-46536)
LBIA0389E
PBIC1653E

FL-14Revision: November 2009
FUEL TANK
2006 QX56
22. If necessary, remove the lock ring using Tool.
23. If necessary, remove the fuel level sensor, fuel filter, and fuelpump assembly. Discard the fuel level sensor, fuel filter, and fuel
pump assembly O-ring.
CAUTION:

Do not bend the float arm during removal.

Avoid impacts such as dropping when handling the com-
ponents.
INSTALLATION
Installation is in the reverse order of removal.

For installation, use a new fuel level sensor, fuel filter, and fuel pump assembly O-ring.

Connect the quick connector as follows:
–Check the connection for any damage or foreign materials.
–Align the connector with the pipe, then insert the connector straight into the pipe until a click is heard.
–After connecting the quick connector, make sure that the con-
nection is secure by checking as follows:
–Pull the tube and the connector to make sure they are securely
connected.
–Visually inspect the connector to make sure the two retainer tabs
are securely connected.
INSPECTION AFTER INSTALLATION
1. Turn the ignition switch ON but do not start engine, then check the fuel pipe and hose connections forleaks while applying fuel pressure.
2. Start the engine and rev it above idle, then check that there are no fuel leaks at any of the fuel pipe and hose connections.Tool number : — (J-46536)
LBIA0389E
PBIC1653E

PRECAUTIONSGI-3
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Revision: November 2009 2006 QX56
PRECAUTIONSPFP:00001
DescriptionEAS001F5
Observe the following precautions to ensure safe and proper servicing. These precautions are not
described in each individual section.
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EAS001F6
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER ”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for NVIS/IVIS (NISSAN/INFINITI VEHICLE IMMOBILIZER SYSTEM -
NATS) (If Equipped)
EAS001TH
NVIS/IVIS (NATS) will immobilize the engine if someone tries to start it without the registered key of NVIS/IVIS
(NATS).
Both of the originally supplied ignition key IDs have been NVIS/IVIS (NATS) registered.
The security indicator is located on the instrument panel. The indicator blinks when the immobilizer system is
functioning.
Therefore, NVIS/IVIS (NATS) warns outsiders that the vehicle is equipped with the anti-theft system.

When NVIS/IVIS (NATS) detects trouble, the security indicator lamp lights up while ignition switch is in
"ON" position.
This lighting up indicates that the anti-theft is not functioning, so prompt service is required.

When servicing NVIS/IVIS (NATS) (trouble diagnoses, system initialization and additional registration of
other NVIS/IVIS (NATS) ignition key IDs), CONSULT-II hardware and CONSULT-II NVIS/IVIS (NATS)
software is necessary.
Regarding the procedures of NVIS/IVIS (NATS) initialization and NVIS/IVIS (NATS) ignition key ID regis-
tration, refer to CONSULT-II operation manual, NVIS/IVIS (NATS).
Therefore, CONSULT-II NVIS/IVIS (NATS) software (program card and operation manual) must be kept
strictly confidential to maintain the integrity of the anti-theft function.

When servicing NVIS/IVIS (NATS) (trouble diagnoses, system initialization and additional registration of
other NVIS/IVIS (NATS) ignition key IDs), it may be necessary to re-register original key identification.
Therefore, be sure to receive all keys from vehicle owner. A maximum of four or five key IDs can be regis-
tered into NVIS/IVIS (NATS).

When failing to start the engine first time using the key of NVIS/IVIS (NATS), start as follows.
1. Leave the ignition key in "ON" position for approximately 5 seconds.
2. Turn ignition key to "OFF" or "LOCK" position and wait approximately 5 seconds.
3. Repeat step 1 and 2 again.
4. Restart the engine while keeping the key separate from any others on key-chain.

GI-6
PRECAUTIONS
Revision: November 20092006 QX56
(i.e. Flexible Fuel Vehicle - FFV models). Using a fuel other than that specified could adversely affect
the emission control devices and systems, and could also affect the warranty coverage validity.
Precautions for Multiport Fuel Injection System or Engine Control SystemEAS001FA

Before connecting or disconnecting any harness connector for
the multiport fuel injection system or ECM:
Turn ignition switch to “OFF” position.
Disconnect negative battery terminal.
Otherwise, there may be damage to ECM.

Before disconnecting pressurized fuel line from fuel pump to
injectors, be sure to release fuel pressure.

Be careful not to jar components such as ECM and mass air
flow sensor.
Precautions for HosesEAS001FB
HOSE REMOVAL AND INSTALLATION

To prevent damage to rubber hose, do not pry off rubber hose
with tapered tool or screwdriver.

To reinstall the rubber hose securely, make sure of hose inser-
tion length and clamp orientation. (If tube is equipped with hose
stopper, insert rubber hose into tube until it butts up against
hose stopper.)
HOSE CLAMPING

If old rubber hose is re-used, install hose clamp in its original
position (at the indentation where the old clamp was). If there is
a trace of tube bulging left on the old rubber hose, align rubber
hose at that position.

Discard old clamps; replace with new ones.
SGI787
SMA019D
SMA020D
SMA021D

SERVICE INFORMATION FOR ELECTRICAL INCIDENTGI-33
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Revision: November 2009 2006 QX56
no voltage; short is further down the circuit than SW1.

With SW1 closed, relay and solenoid disconnected and the DMM leads across both fuse terminals, check
for voltage.
voltage; short is between SW1 and the relay (point B).
no voltage; short is further down the circuit than the relay.

With SW1 closed, relay contacts jumped with fused jumper wire check for voltage.
voltage; short is down the circuit of the relay or between the relay and the disconnected solenoid (point C).
no voltage; retrace steps and check power to fuse block.
Ground Inspection
Ground connections are very important to the proper operation of electrical and electronic circuits. Ground
connections are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can
become an unwanted resistance. This unwanted resistance can change the way a circuit works.
Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drasti-
cally affect an electronically controlled circuit. A poor or corroded ground can easily affect the circuit. Even
when the ground connection looks clean, there can be a thin film of rust on the surface.
When inspecting a ground connection follow these rules:

Remove the ground bolt or screw.

Inspect all mating surfaces for tarnish, dirt, rust, etc.

Clean as required to assure good contact.

Reinstall bolt or screw securely.

Inspect for “add-on” accessories which may be interfering with the ground circuit.

If several wires are crimped into one ground eyelet terminal, check for proper crimps. Make sure all of the
wires are clean, securely fastened and providing a good ground path. If multiple wires are cased in one
eyelet make sure no ground wires have excess wire insulation.
For detailed ground distribution information, refer to “Ground Distribution” in PG section.
Voltage Drop Tests
Voltage drop tests are often used to find components or circuits which have excessive resistance. A voltage
drop in a circuit is caused by a resistance when the circuit is in operation.
Check the wire in the illustration. When measuring resistance with DMM, contact by a single strand of wire will
give reading of 0 ohms. This would indicate a good circuit. When the circuit operates, this single strand of wire
is not able to carry the current. The single strand will have a high resistance to the current. This will be picked
up as a slight voltage drop.
Unwanted resistance can be caused by many situations as follows:

Undersized wiring (single strand example)

Corrosion on switch contacts

Loose wire connections or splices.
SGI853

GI-38
CONSULT-II CHECKING SYSTEM
Revision: November 20092006 QX56
CONSULT-II CHECKING SYSTEMPFP:00000
DescriptionEAS001FP

CONSULT-II is a hand-held type tester. When it is connected with a diagnostic connector equipped on the
vehicle side, it will communicate with the control unit equipped in the vehicle and then enable various
kinds of diagnostic tests.

Refer to “CONSULT-II Software Operation Manual ” for more information.
Function and System ApplicationEAS001TO
Diagnostic test
mode Function
ENGINE
A/T
ICC
ABS
AIR BAG
IPDM E/R BCM
AUTO DRIVE POS.
REARVIEW CAMERA
AIR LEVELIZER
ALL MODE AWD/4WD HVAC
NVIS (NATS)
*1
NVIS (NATS BCM OR S/ENT)
*1
Work support This mode enables a technician to adjust some
devices faster and more accurately by following the
indications on CONSULT-II. x - xx - - xxxxx - - -
Self-diagnostic Self-diagnostic can be performed quickly. ----x---------
Self-diagnos-
tic results Self-diagnostic results can be read and erased
quickly.
xxxx - xxx - xxxxx
Trouble diag-
nostic record Current self-diagnostic results and all trouble diagnos-
tic records previously stored can be read.
--- - x---------
Data monitor Input/Output data in the ECM can be read. xxxx - x - xxxxx - -
Data monitor
(spec) Data monitor specification can be read.
x-------------
CAN diagno-
sis support
monitor The communication condition of CAN communication
line can be read.
xxxx - xxx - - xx - -
Active test Diagnostic Test Mode in which CONSULT-II drives
some actuators apart from the ECMs and also shifts
some parameters in a specified range.
x-xx-x-x-x----
Function test This mode can show results of self-diagnosis of ECU
with either “
OK” or “NG ”. For engines, more practical
tests regarding sensors/switches and/or actuators are
available. xx-xx- --- -----
DTC & SRT
confirmation The results of SRT (System Readiness Test) and the
self-diagnosis status/result can be confirmed.
x-------------
DTC work sup-
port The operating condition to confirm Diagnosis Trouble
Codes can be selected.
xx------------
ECM/ECU part
number ECM/ECU part number can be read.
x x x x - - x x x x x x - -
ECU discrimi-
nated No. Classification number of a replacement ECU can be
read to prevent an incorrect ECU from being installed.
----x---------
Passenger air
bag Displays the STATUS (readiness) of the front passen-
ger airbag.
----x---------
Configuration Sets control module parameters to match vehicle
options. ------x-------
PIN read
*2This mode shows the BCM-specific 5-digit code. -------------x
Control unit
initialization
*2All registered ignition key IDs in NATS components
can be initialized and new IDs can be registered. ------------x-