INFINITI QX56 2006 Factory Service Manual

BRC-64
[VDC/TCS/ABS]
WHEEL SENSORS
Revision: November 20092006 QX56
WHEEL SENSORSPFP:47910
Removal and InstallationEFS0068D
REMOVAL
1. Remove wheel sensor bolt.

When removing the front wheel sensor, first remove the disc rotor to gain access to the front wheel sen-
sor bolt. Refer to BR-22, "
Removal and Installation of Brake Caliper and Disc Rotor" .

When removing the rear wheel sensor, first remove the rear hub and bearing assembly to gain access
to the rear wheel sensor bolt. Refer to RAX-5, "
Removal and Installation" .
2. Pull out the sensor, being careful to turn it as little as possible. CAUTION:

Do not pull on the sensor harness.
3. Disconnect wheel sensor harness electrical connector, then remove harness from attaching points.
INSTALLATION
Installation is in the reverse order of removal. Tighten wheel sensor bolt to specification.
CAUTION:
Installation should be performed while paying attention to the following.

Inspect wheel sensor O-ring, replace sensor assembly if damaged.

Before installing wheel sensor, make sure no foreign materials (such as iron fragments) are
adhered to the pick-up part of the sensor, to the inside of the sensor hole or on the rotor mating
surface.

Apply a coat of suitable grease to the wheel sensor O-ring and hole. Refer to MA-11, "RECOM-
MENDED FLUIDS AND LUBRICANTS" .
WFIA0376E

SENSOR ROTORBRC-65
[VDC/TCS/ABS]
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Revision: November 2009 2006 QX56
SENSOR ROTORPFP:47970
Removal and Installation EFS0068E
NOTE:
The wheel sensor rotors are built into the wheel hubs and are not removable. If damaged, replace wheel hub
and bearing assembly. Refer to FA X - 5 , "
Removal and Installation" (front), RAX-5, "Removal and Installation"
(rear).

BRC-66
[VDC/TCS/ABS]
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Revision: November 20092006 QX56
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)PFP:47660
Removal and InstallationEFS0068F
REMOVAL
1. Disconnect the negative battery terminal.
2. Remove the cowl top extension. Refer to EI-18, "
Removal and Installation" .
3. Drain the brake fluid. Refer to BR-10, "
Drain and Refill" .
4. Disconnect the actuator harness from the ABS actuator and electric unit (control unit). CAUTION:

To remove the brake tubes, use a flare nut wrench to prevent the flare nuts and brake tubes from
being damaged.

Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is
splashed on painted areas, wash it away with water immediately.
5. Disconnect the brake tubes.
6. Remove the three bolts and remove the ABS actuator and electric unit (control unit).
1. To left front 2. To rear right 3. To rear left
4. To front right 5. From the master cylinder secondary
side 6. From the master cylinder primary
side
7. ABS actuator and electric unit (con- trol unit) 8. Harness connector
WFIA0375E

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)BRC-67
[VDC/TCS/ABS]
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Revision: November 2009 2006 QX56
INSTALLATION
Installation is in the reverse order of removal.
NOTE:
To install, use a flare nut wrench (commercial service tool). Tighten brake tubes to specification when install-
ing. Refer to BR-12, "
Hydraulic Circuit" .

After installation of the ABS actuator and electric unit (control unit), refill the brake system with new brake
fluid. Refer to MA-11, "
RECOMMENDED FLUIDS AND LUBRICANTS" . Then bleed the air from the sys-
tem. Refer to BR-11, "
Bleeding Brake System" .
CAUTION:

Never reuse drained brake fluid.

Adjust the steering angle sensor. Refer to BRC-62, "Adjustment of Steering Angle Sensor Neu-
tral Position" .

Calibrate the yaw rate/side/decel G sensor. Refer to BRC-62, "Calibration of Decel G Sensor" .

BRC-68
[VDC/TCS/ABS]
STEERING ANGLE SENSOR
Revision: November 20092006 QX56
STEERING ANGLE SENSORPFP:25554
Removal and InstallationEFS0068G
The steering angle sensor is an integral part of the spiral cable. Refer to SRS-48, "Removal and Installation" .
CAUTION:
After installation of spiral cable, adjust steering angle sensor. Refer to BRC-62, "
Adjustment of Steer-
ing Angle Sensor Neutral Position" .

G SENSORBRC-69
[VDC/TCS/ABS]
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Revision: November 2009 2006 QX56
G SENSORPFP:47930
Removal and InstallationEFS0068H
REMOVAL
1. Remove center console. Refer to IP-16, "REMOVAL AND
INSTALLATION" .
2. Remove yaw rate/side/decel G sensor attaching nuts. CAUTION:

Do not use power tools to remove or install yaw rate/side/
decel G sensor.

Do not drop or strike the yaw rate/side/decel G sensor.
3. Disconnect harness connector and remove the yaw rate/side/ decel G sensor.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
After installation, calibrate the yaw rate/side/decel G sensor. Refer to BRC-62, "
Calibration of Decel G
Sensor" .
WFIA0230E

BRC-70
[VDC/TCS/ABS]
G SENSOR
Revision: November 20092006 QX56

CO-1
ENGINE COOLING SYSTEM
B ENGINE
CONTENTS
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SECTION
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Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 2
Precautions for Liquid Gasket ............................. ..... 2
REMOVAL OF LIQUID GASKET SEALING ..... ..... 2
LIQUID GASKET APPLICATION PROCEDURE ..... 2
PREPARATION ...................................................... ..... 4
Special Service Tools .......................................... ..... 4
Commercial Service Tools ................................... ..... 4
OVERHEATING CAUSE ANALYSIS ..................... ..... 6
Troubleshooting Chart ......................................... ..... 6
COOLING SYSTEM ............................................... ..... 8
Cooling Circuit .......................................................... 8
System Drawing ....................................................... 9
ENGINE COOLANT ............................................... ... 10
Inspection ............................................................ ... 10
LEVEL CHECK ................................................ ... 10
CHECKING COOLING SYSTEM FOR LEAKS ... 10
CHECKING RESERVOIR CAP ........................ ... 10
CHECKING RADIATOR CAP ........................... ... 10
Changing Engine Coolant ................................... ... 10
DRAINING ENGINE COOLANT ...................... .... 11
REFILLING ENGINE COOLANT ..................... .... 11
FLUSHING COOLING SYSTEM ...................... ... 12
RADIATOR ............................................................. ... 14
Removal and Installation ..................................... ... 14
REMOVAL ........................................................ ... 14
INSTALLATION ................................................ ... 16INSPECTION AFTER INSTALLATION .............
... 16
Checking Radiator ............................................... ... 16
ENGINE COOLING FAN ........................................ ... 17
Removal and Installation (Crankshaft Driven Type) ... 17
REMOVAL ........................................................ ... 17
INSPECTION AFTER REMOVAL .................... ... 17
INSTALLATION ................................................ ... 17
INSPECTION AFTER INSTALLATION ............. ... 17
Removal and Installation (Motor Driven Type) .... ... 18
REMOVAL ........................................................ ... 18
INSTALLATION ................................................ ... 18
WATER PUMP ....................................................... ... 19
Removal and Installation ..................................... ... 19
REMOVAL ........................................................ ... 19
INSPECTION AFTER REMOVAL .................... ... 19
INSTALLATION ................................................ ... 19
INSPECTION AFTER INSTALLATION ............. ... 20
THERMOSTAT AND WATER PIPING ................... ... 21
Removal and Installation ..................................... ... 21
REMOVAL ........................................................ ... 21
INSPECTION AFTER REMOVAL .................... ... 22
INSTALLATION ................................................ ... 22
INSPECTION AFTER INSTALLATION ............. ... 22
SERVICE DATA AND SPECIFICATIONS (SDS) ... ... 23
Standard and Limit ............................................... ... 23
ENGINE COOLANT CAPACITY (APPROXI-
MATE) ............................................................... ... 23
THERMOSTAT ................................................. ... 23
RADIATOR ....................................................... ... 23

CO-2Revision: November 2009
PRECAUTIONS
2006 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EBS00RE2
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 Liquid GasketEBS00RE3
REMOVAL OF LIQUID GASKET SEALING

After removing the bolts and nuts, separate the mating surface
and remove the old liquid gasket sealing using Tool.
CAUTION:
Do not damage the mating surfaces.

Tap the seal cutter to insert it.

In areas where the Tool is difficult to use, lightly tap to slide it.
LIQUID GASKET APPLICATION PROCEDURE
1. Remove the old liquid gasket adhering to the gasket application surface and the mating surface using suitable tool.

Remove the liquid gasket completely from the groove of the
liquid gasket application surface, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove adhering moisture, grease and foreign material.Tool number
: KV10111100 (J-37228)
WBIA0566E
PBIC0003E

PRECAUTIONSCO-3
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Revision: November 2009 2006 QX56
3. Attach the liquid gasket tube to the Tool.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-46, "
Recommended Chemical Products and Sealants" .
4. Apply the liquid gasket without breaks to the specified location with the specified dimensions.

If there is a groove for the liquid gasket application, apply the
liquid gasket to the groove.

As for the bolt holes, normally apply the liquid gasket inside
the holes. If specified in the procedure, it should also be
applied outside the holes.

Within five minutes of liquid gasket application, install the mat-
ing component.

If the liquid gasket protrudes, wipe it off immediately.

Do not retighten after the installation.

Wait 30 minutes or more after installation before refilling the
engine with engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe them. Tool number : WS39930000 ( — )
WBIA0567E
SEM159F