INFINITI QX56 2006 Factory Service Manual

BL-210
BODY REPAIR
Revision: November 20092006 QX56
Installation Notes

Scribe a straight line on the inner side rail crush horn along the hole center as shown in the figure. Cut off
inner side rail crush horn along scribed line.

Scribe a straight line on the outer side rail crush horn along the hole center as shown in the figure. Cut off
outer side rail crush horn along scribed line.
LIIA1087E
LIIA1088E

BODY REPAIRBL-211
C
DE
F
G H
J
K L
M A
B
BL
Revision: November 2009 2006 QX56

Weld part to be butt-welded and seam-welded corner to corner as shown in the figure.
LIIA1089E

BL-212
BODY REPAIR
Revision: November 20092006 QX56

BR-1
BRAKE SYSTEM
F BRAKES
CONTENTS
C
DE
G H
I
J
K L
M
SECTION
A
B
BR
Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 3
Precautions for Brake System ............................. ..... 3
PREPARATION ...................................................... ..... 4
Special Service Tool ............................................ ..... 4
Commercial Service Tools ................................... ..... 4
NOISE, VIBRATION, AND HARSHNESS (NVH)
TROUBLESHOOTING ........................................... ..... 5
NVH Troubleshooting Chart ................................ ..... 5
BRAKE PEDAL ..................................................... ..... 6
Inspection and Adjustment .................................. ..... 6
INSPECTION ................................................... ..... 6
ADJUSTMENT ................................................. ..... 7
Removal and Installation ..................................... ..... 8
REMOVAL ........................................................ ..... 8
INSPECTION AFTER REMOVAL .................... ..... 9
INSTALLATION ................................................ ..... 9
BRAKE FLUID ....................................................... ... 10
On-board Inspection ............................................ ... 10
LEVEL CHECK ................................................ ... 10
Drain and Refill .................................................... ... 10
Bleeding Brake System ....................................... .... 11
BRAKE PIPING AND HOSE ................................. ... 12
Hydraulic Circuit .................................................. ... 12
Removal and Installation of Front Brake Hose .... ... 12
REMOVAL ........................................................ ... 12
INSTALLATION ................................................ ... 13
Removal and Installation of Rear Brake Hose .... ... 13
REMOVAL ........................................................ ... 13
INSTALLATION ................................................ ... 13
Inspection After Installation ................................. ... 14
BRAKE MASTER CYLINDER ............................... ... 15
On-board Inspection ............................................ ... 15
LEAK INSPECTION ......................................... ... 15
Removal and Installation ..................................... ... 15
REMOVAL ........................................................ ... 15INSTALLATION ................................................
... 16
Disassembly and Assembly ................................. ... 16
DISASSEMBLY ................................................ ... 16
ASSEMBLY ...................................................... ... 16
BRAKE BOOSTER ................................................ ... 17
On-Vehicle Service .............................................. ... 17
OPERATING CHECK ....................................... ... 17
AIRTIGHT CHECK ........................................... ... 17
Removal and Installation ..................................... ... 18
REMOVAL ........................................................ ... 18
INSTALLATION ................................................ ... 18
VACUUM LINES .................................................... ... 20
Removal and Installation ..................................... ... 20
Inspection ............................................................ ... 20
VISUAL INSPECTION ...................................... ... 20
CHECK VALVE INSPECTION .......................... ... 20
FRONT DISC BRAKE ............................................ ... 21
On-vehicle Inspection .......................................... ... 21
PAD WEAR INSPECTION ................................... 21
Components ........................................................ ... 21
Removal and Installation of Brake Pad ............... ... 22
REMOVAL ........................................................ ... 22
INSTALLATION ................................................ ... 22
Removal and Installation of Brake Caliper and Disc
Rotor .................................................................... ... 22
REMOVAL ........................................................ ... 22
INSTALLATION ................................................ ... 22
Disassembly and Assembly of Brake Caliper ...... ... 23
DISASSEMBLY ................................................ ... 23
CALIPER INSPECTION ................................... ... 24
ASSEMBLY ...................................................... ... 24
DISC ROTOR INSPECTION ............................ ... 25
BRAKE BURNISHING PROCEDURE .............. ... 25
REAR DISC BRAKE .............................................. ... 27
On-vehicle Inspection .......................................... ... 27
PAD WEAR INSPECTION ................................... 27
Components ........................................................ ... 27
Removal and Installation of Brake Pad ............... ... 28
REMOVAL ........................................................ ... 28
INSTALLATION ................................................ ... 28

BR-2Revision: November 20092006 QX56
Removal and Installation of Brake Caliper and Disc
Rotor ....................................................................
... 28
REMOVAL ........................................................ ... 28
INSTALLATION ................................................. ... 28
Disassembly and Assembly of Brake Caliper ...... ... 29
DISASSEMBLY ................................................ ... 29
CALIPER INSPECTION ................................... ... 29
ASSEMBLY ...................................................... ... 30
DISC ROTOR INSPECTION ............................ ... 30
BRAKE BURNISHING PROCEDURE .............. ... 31SERVICE DATA AND SPECIFICATIONS (SDS) ...
... 32
General Specifications ......................................... ... 32
Brake Pedal ......................................................... ... 32
Brake Booster ...................................................... ... 32
Check Valve ......................................................... ... 32
Front Disc Brake .................................................. ... 32
Rear Disc Brake ................................................... ... 33

PRECAUTIONSBR-3
C
DE
G H
I
J
K L
M A
B
BR
Revision: November 2009 2006 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EFS004VW
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 Brake SystemEFS004VX

Always use recommended brake fluid. Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS" .

Do not reuse drained brake fluid.

Be careful not to splash brake fluid on painted areas.

To clean or wash all parts of master cylinder, disc brake caliper and wheel cylinder, use clean brake fluid.

Do not use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.

Use flare nut wrench when removing and installing brake tube.

Always check tightening torque when installing brake lines.

Before working, turn ignition switch to OFF and disconnect con-
nectors for ABS actuator and electric unit (control unit) or battery
terminals.

Burnish the brake contact surfaces after refinishing or replacing
drums or rotors, after replacing pads or linings, or if a soft pedal
occurs at very low mileage.
Refer to BR-25, "
BRAKE BURNISHING PROCEDURE" .
WARNING:

Clean brake pads and shoes with a waste cloth, then wipe
with a dust collector.SBR686C

BR-4
PREPARATION
Revision: November 20092006 QX56
PREPARATIONPFP:00002
Special Service ToolEFS0068R
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolsEFS0068S
Tool number
(Kent-Moore No.)
Tool nameDescription
—
(J-46532)
Brake and clutch pedal height measure-
ment tool Measuring brake pedal height
LFIA0227E
Tool name
Description
1. Flare nut crowfoot
2. Torque wrench Removing and installing each brake pip-
ing.
a: 10 mm (0.39 in) / 12 mm (0.47 in)
Power tool Removing nuts, bolts and screws.
S-NT360
PBIC0190E
PBIC0191E

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGBR-5
C
DE
G H
I
J
K L
M A
B
BR
Revision: November 2009 2006 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEFS004VZ
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
BR-21
,
BR-27
BR-21
, BR-27
BR-21
, BR-27
BR-25
, BR-30
BR-25
, BR-30
BR-25
, BR-30
BR-25
, BR-30
BR-25
, BR-30
BR-25
, BR-31
BR-25
, BR-31

PR-3, "
NVH Troubleshooting Chart
"
FFD-6, "
NVH Troubleshooting Chart
", RFD-7, "
NVH Troubleshooting Chart
"
FAX-4, "
NVH Troubleshooting Chart
", RAX-4, "
NVH Troubleshooting Chart
"
FSU-4, "
NVH Troubleshooting Chart
", RSU-5, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and
SUSPECTED PARTS
Pads - damaged
Pads - uneven wear
Shims damaged
Rotor imbalance
Rotor damage
Rotor runout
Rotor deformation
Rotor deflection
Rotor rust
Rotor thickness variation
PROPELLER SHAFT
DIFFERENTIAL
DRIVESHAFT
SUSPENSION
TIRES AND ROAD WHEEL
STEERING
Symptom Noise
××× ××××××
Shake ××××××
Shimmy, Shudder ××××××× ××××

BR-6
BRAKE PEDAL
Revision: November 20092006 QX56
BRAKE PEDALPFP:46501
Inspection and Adjustment EFS0068P
INSPECTION
1. Inspect the brake pedal free height "H" from the lower dash panel using tool.
2. Adjust the height referring to the following specifications.
CAUTION:
When equipped with adjustable pedal, the pedal must be in
the forwardmost (closest to the floor) position for pedal
height measurement.
Brake Pedal Specifications
Unit: mm (in)
Tool number : — (J-46532)
WFIA0160E
Free height "H" : 182.3 - 192.3 mm (7.18 - 7.57 in)
Depressed pedal height "D" [under a force of 490 N (50 kg-f, 110 lb-f) with engine
running] : More than 90.3 mm (3.55 in)
Clearance between pedal stopper and threaded end of stop lamp switch and
ASCD switch "C
1 " or “ C2 ” : 0.74 - 1.96 mm (0.029 - 0.077 in)
Pedal play "A" : 3 - 11 mm (0.12 - 0.43 in)

BRAKE PEDALBR-7
C
DE
G H
I
J
K L
M A
B
BR
Revision: November 2009 2006 QX56
ADJUSTMENT
1. Loosen the stop lamp switch and ASCD switch by turning 45° counterclockwise.
2. Loosen lock nut on the input rod, then turn input rod to adjust the pedal to specified height. When finished adjusting, tighten lock
nut.
CAUTION:
Make sure that the screw portion of the end of input rod is
located inside the clevis.
3. With the pedal pulled up and held by hand, press the stop lamp switch and the ASCD switch in until threaded ends contact pedal
arm.
4. With the threaded ends of the stop lamp switch and ASCD switch contacting the pedal arm, turn the switches 45 ° clockwise
to lock in place.
CAUTION:
Make sure that the gap (C) between the rubber stops and
switch ends are within specification.
5. Check the pedal play. CAUTION:
Make sure that the stop lamp goes off when the pedal is
released.
6. Start the engine and check the height of the brake pedal when depressing it.Lock nut : 18.6 N·m (1.9 kg-m, 14 ft-lb)
PFIA0436E