2006 INFINITI QX56 tires

FRONT DISC BRAKEBR-23
C
DE
G H
I
J
K L
M A
B
BR
Revision: November 2009 2006 QX56

Do not reuse drained brake fluid.
1. Install disc rotor.
2. Install sliding pin bolts and torque member to caliper, if removed. Refer to BR-21, "
Components" .
3. Install caliper assembly to the vehicle, then tighten the torque member bolts to the specified torque. Refer to BR-21, "
Compo-
nents" .
CAUTION:

When attaching caliper assembly to the vehicle, wipe any
oil off knuckle spindle, washers and caliper assembly
attachment surfaces.

Do not reuse caliper torque member bolts.
4. Install brake hose to cylinder body, then tighten union bolt to specification, as necessary. Refer to BR-21, "
Components" .
CAUTION:

Do not reuse copper washer.

Install brake hose to caliper assembly together with
union bolt and washers.
5. Refill with new brake fluid and bleed air. Refer to BR-11, "
Bleeding Brake System" .
6. Install tires to the vehicle. Refer to WT-7, "
Rotation" .
Disassembly and Assembly of Brake CaliperEFS004WK
DISASSEMBLY
1. Remove sliding pin bolt, and then remove the pad, shim, shim cover, and pad retainer from the torque member.
2. Remove sliding pins and sliding pin boots from torque member.
3. Place a wooden block as shown, and blow air from union bolt mounting hole to remove pistons and piston boots.
CAUTION:
Do not get your fingers caught in piston.
LFIA0209E
LFIA0214E
MAA0272D

BR-28
REAR DISC BRAKE
Revision: November 20092006 QX56
WARNING:
Clean dust on caliper and brake pad with a vacuum dust collector to minimize the hazard of airborne
particles or other materials.
CAUTION:

While removing cylinder body, never depress brake pedal because piston will pop out.

It is not necessary to remove bolts on torque member and brake hose except for disassembly or
replacement of cylinder body. In this case, hang cylinder body with a wire so as not to stretch
brake hose.

Do not damage piston boot.

Burnish brake contact surface after refinishing or replacing rotors, after replacing pads, or it a soft
pedal occurs at very low mileage. Refer to BR-31, "
BRAKE BURNISHING PROCEDURE" .
Removal and Installation of Brake PadEFS004WN
REMOVAL
1. Remove tires from vehicle with power tool.
2. Remove the top bolt from the cylinder body.
3. Swing cylinder body open, and remove pads.
INSTALLATION
1. Push piston in so that pad is firmly attached and install cylinder body to torque member.
NOTE:
Using a disc brake piston tool (commercial service tool), makes it easier to push in the piston.
CAUTION:
By pushing in piston, brake fluid returns to master cylinder reservoir tank. Watch the level of the
surface of reservoir tank.
2. Apply Molykote M-77 grease to knuckle slide where brake pad contacts.
CAUTION:
Do not get grease on the brake rotor friction surface.
3. Install pads to cylinder body.
4. Install cylinder body top bolt and tighten to specification.
5. Check brake for drag.
6. Install tires to the vehicle. Refer to WT-7, "
Rotation" .
Removal and Installation of Brake Caliper and Disc RotorEFS004WO
REMOVAL
1. Remove tires from vehicle with power tool.
2. Drain brake fluid as necessary. Refer to BR-10, "
Drain and Refill" .
NOTE:
Do not remove union bolt unless removing cylinder body from vehicle.
3. Remove mounting bolts and cylinder body. NOTE:
Position cylinder body aside using suitable wire, as necessary.
4. Remove disc rotor.
INSTALLATION
CAUTION:

Refill with new brake fluid. Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS" .

Do not reuse drained brake fluid.
1. Install disc rotor.
LFIA0211E

REAR DISC BRAKEBR-29
C
DE
G H
I
J
K L
M A
B
BR
Revision: November 2009 2006 QX56
2. Install cylinder body and tighten bolts to specification. Refer to BR-27, "Components" .
CAUTION:
Before installing cylinder body to the vehicle, wipe off mating surface of cylinder body.
3. Install brake hose to cylinder body and tighten union bolt to specification as necessary. Refer to BR-27,
"Components" .
CAUTION:

Do not reuse copper washers.

Securely attach brake hose to protrusion on cylinder body.
4. Refill new brake fluid and bleed air as necessary. Refer to BR-11, "
Bleeding Brake System" .
5. Install tires to the vehicle. Refer to WT-7, "
Rotation" .
Disassembly and Assembly of Brake CaliperEFS004WP
DISASSEMBLY
1. Remove pads from cylinder body.
2. Remove sliding sleeve and boot from cylinder body.
3. Place a wooden block as shown, and blow air into union bolt hole to remove piston and piston boot.
CAUTION:
Do not get your fingers caught in piston.
4. Using a suitable tool, remove piston seal from cylinder body as shown.
CAUTION:
Be careful not to damage cylinder body inner wall.
CALIPER INSPECTION
Cylinder Body
CAUTION:

Use new brake fluid to clean. Do not use mineral oils such as gasoline or kerosene. Refer to MA-
11 , "RECOMMENDED FLUIDS AND LUBRICANTS" .

Check inside surface of cylinder body for score, rust wear, damage or foreign materials. If any of
the above conditions are observed, replace cylinder body.

Minor damage from rust or foreign materials may be eliminated by polishing surface with a fine
emery paper. Replace cylinder body if necessary.
To r q u e M e m b e r
Check for wear, cracks, and damage. If damage or deformation is present, replace the affected part.
Piston
CAUTION:

Piston sliding surface is plated, do not polish with emery paper even if rust of foreign materials
are stuck to sliding surface.

Check piston for score, rust, wear, damage or presence of foreign materials. Replace if any of the
above conditions are observed.
BRD0041D
PFIA0269E

BRC-4
[VDC/TCS/ABS]
PRECAUTIONS
Revision: November 20092006 QX56

If NO, GO TO 5.
2. Is there any indication other than indications relating to CAN communication system in the self-diagnosis results?

If YES, GO TO 3.

If NO, GO TO 4.
3. Based on self-diagnosis results unrelated to CAN communication, carry out the inspection.
4. Malfunctions may be detected in self-diagnosis depending on control units carrying out CAN communica- tion. Therefor, erase the self-diagnosis results.
5. Diagnose CAN communication system. Refer to BRC-10, "
CAN COMMUNICATION" .
Precautions for Brake ControlEFS004X6

During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.

Just after starting vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check.

Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.

When an error is indicated by ABS or another warning lamp, collect all necessary information from cus-
tomer (what symptoms are present under what conditions) and check for simple causes before starting
diagnosis. Besides electrical system inspection, check booster operation, brake fluid level, and fluid leaks.

If incorrect tire sizes or types are installed on the vehicle or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.

If there is a radio, antenna or related wiring near control module, ABS function may have a malfunction or
error.

If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits or improper wiring.

If the following components are replaced with non-genuine components or modified, the VDC OFF indica-
tor lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Components
related to suspension (shock absorbers, struts, springs, bushings, etc.), tires, wheels (exclude specified
size), components related to brake system (pads, rotors, calipers, etc.), components related to engine
(muffler, ECM, etc.), components related to body reinforcement (roll bar, tower bar, etc.).

Driving with broken or excessively worn suspension components, tires or brake system components may
cause the VDC OFF indicator lamp and the SLIP indicator lamp to turn on, and the VDC system may not
operate properly.

When the TCS or VDC is activated by sudden acceleration or sudden turn, some noise may occur. The
noise is a result of the normal operation of the TCS and VDC.

When driving on roads which have extreme slopes (such as mountainous roads) or high banks (such as
sharp curves on a freeway), the VDC may not operate normally, or the VDC warning lamp and the SLIP
indicator lamp may turn on. This is not a problem if normal operation can be resumed after restarting the
engine.

Sudden turns (such as spin turns, acceleration turns), drifting, etc. with VDC turned off may cause the yaw
rate/side G sensor to indicate a problem. This is not a problem if normal operation can be resumed after
restarting the engine.
Precautions for CAN SystemEFS004X7

Do not apply voltage of 7.0V or higher to terminal to be measured.

Maximum open terminal voltage of tester in use must be less than 7.0V.

Before checking harnesses, turn ignition switch OFF and disconnect battery negative cable.

BRC-38
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: November 20092006 QX56
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSPFP:00000
Wheel Sensor System InspectionEFS004XR
INSPECTION PROCEDURE
1. CONNECTOR INSPECTION
Disconnect the ABS actuator and electric unit (control unit) connector E125 and wheel sensor of malfunction-
ing code.
Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace as necessary.
2. CHECK WHEEL SENSOR OUTPUT SIGNAL
1. Connect ABS active wheel sensor tester (J-45741) to wheel sensor using appropriate adapter.
2. Turn on the ABS active wheel sensor tester power switch. NOTE:
The green POWER indicator should illuminate. If the POWER indicator does not illuminate, replace the
battery in the ABS active wheel sensor tester before proceeding.
3. Spin the wheel of the vehicle by hand and observe the red SENSOR indicator on the ABS active wheel sensor tester. The red SENSOR indicator should flash on and off to indicate an output signal.
NOTE:
If the red SENSOR indicator illuminates but does not flash, reverse the polarity of the tester leads and
retest.
Does the ABS active wheel sensor tester detect a signal?
YES >> GO TO 3.
NO >> Replace the wheel sensor. Refer to BRC-64, "
Removal and Installation" .
3. CHECK TIRES
Check for inflation pressure, wear and size of each tire.
Are tire pressure and size correct and is tire wear within specifications?
YES >> GO TO 4.
NO >> Adjust tire pressure or replace tire(s).
4. CHECK WHEEL BEARINGS
Check wheel bearing axial end play. Refer to FA X - 5 , "
WHEEL BEARING INSPECTION" or RAX-5, "WHEEL
BEARING INSPECTION" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace as necessary. Refer to FAX-5, "
WHEEL BEARING INSPECTION" or RAX-5,
"WHEEL BEARING INSPECTION" .
5. CHECK WIRING HARNESS FOR SHORT CIRCUIT
1. Disconnect ABS actuator and electric unit (control unit) connec- tor and wheel sensor connector of malfunction code No.
2. Check continuity between wheel sensor harness connector ter- minals and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair the circuit. Continuity should not exist.
WFIA0343E

BRC-62
[VDC/TCS/ABS]
ON-VEHICLE SERVICE
Revision: November 20092006 QX56
ON-VEHICLE SERVICEPFP:00000
Adjustment of Steering Angle Sensor Neutral PositionEFS004YH
After removing/installing or replacing ABS actuator and electric unit (control unit), steering angle sensor, steer-
ing and suspension components which affect wheel alignment or after adjusting wheel alignment, be sure to
adjust neutral position of steering angle sensor before running vehicle.
NOTE:
Adjustment of steering angle sensor neutral position requires CONSULT-II.
1. Stop vehicle with front wheels in straight-ahead position.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector on vehicle, and turn ignition switch ON (do not
start engine).
3. Touch “ABS”, “WORK SUPPORT ” and “ST ANGLE SENSOR
ADJUSTMENT ” on CONSULT-II screen in this order.
4. Touch “START”.
CAUTION:
Do not touch steering wheel while adjusting steering angle
sensor.
5. After approximately 10 seconds, touch “END”. (After approxi-
mately 60 seconds, it ends automatically.)
6. Turn ignition switch OFF, then turn it ON again.
7. Run vehicle with front wheels in straight-ahead position, then stop.
8. Select “DATA MONITOR ”, “SELECTION FROM MENU ”, and
“STR ANGLE SIG ” on CONSULT-II screen. Then check that
“STR ANGLE SIG ” is within 0±3.5 deg. If value is more than specification, repeat steps 1 to 5.
9. Erase memory of ABS actuator and electric unit (control unit) and ECM.
10. Turn ignition switch to OFF.
Calibration of Decel G SensorEFS004YI
After removing/installing or replacing ABS actuator and electric unit (control unit), yaw rate/side/decel G sen-
sor, steering and suspension components which affect wheel alignment or after adjusting wheel alignment, be
sure to calibrate the decel G sensor before running vehicle.
NOTE:
Calibration of decel G sensor requires CONSULT-II.
1. Stop vehicle with front wheels in straight-ahead position. CAUTION:

The work should be done on a level area with an unloaded vehicle.

Keep all the tires inflated to the correct pressures. Adjust the tire pressure to the specified pres-
sure value.
2. Connect CONSULT-II with CONSULT-II CONVERTER to data link connector on vehicle, and turn ignition switch ON (do not start engine).
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
3. Touch "ABS", "WORK SUPPORT" and "DECEL G SEN CALIBRATION" on CONSULT-II screen in this order. Refer to BRC-28, "
CONSULT-II BASIC OPERATION PROCEDURE" .
BBIA0369E
WFIA0239E

OVERHEATING CAUSE ANALYSISCO-7
C
DE
F
G H
I
J
K L
M A
CO
Revision: November 2009 2006 QX56
Except cool-
ing system
parts mal-
function—
Overload on engine Abusive driving
High engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system mal-
function
—
Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flow Blocked bumper
—
—
Blocked radiator grille
Installed car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser Blocked air flow
Installed large fog lamp
Symptom
Check items

EXHAUST MANIFOLD AND THREE WAY CATALYSTEM-21
C
DE
F
G H
I
J
K L
M A
EM
Revision: November 2009 2006 QX56
EXHAUST MANIFOLD AND THREE WAY CATALYSTPFP:14004
Removal and InstallationEBS00RF1
REMOVAL
WARNING:
Perform the work when the exhaust and cooling system have cooled sufficiently.
1. Remove the engine undercover (rear) using power tool (4WD models).
2. Remove front final drive assembly (4WD models). Refer to FFD-12, "
Removal and Installation" .
3. Remove the main muffler assembly and center exhaust tube. Refer to EX-3, "
Removal and Installation" .
4. Remove the front exhaust tubes. Refer to EX-3, "
Removal and Installation" .
5. Remove the front tires. Refer to WT-7, "
Rotation" .
6. Remove fender protectors. Refer to EI-23, "
Removal and Installation" .
7. Remove the air fuel ratio A/F sensors (bank 1, bank 2).

Follow steps below to remove each air fuel ratio A/F sensor.
a. Remove the harness connector of each air fuel ratio A/F sensor, and harness from bracket and middle clamp.
1. Air fuel ratio A/F sensor 1 (bank 2) 2. Exhaust manifold cover (bank 2) 3. Exhaust manifold (bank 2)
4. Gaskets 5. Exhaust manifold (bank 1) 6. Exhaust manifold cover (bank 1)
7. Air fuel ratio A/F sensor 1 (bank 1)
WBIA0466E