2004 INFINITI QX56 brakes

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
FFD-7
C
E
F
G
H
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K
L
MA
B
FFD
Revision: August 20072004 QX56
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS0035I
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
FFD-15FFD-15

FFD-15
FFD-16
FFD-16
MA-24, "
Checking Final Drive Oil
"
PR-3, "
NVH Troubleshooting Chart
"
FSU-4, "
NVH Troubleshooting Chart
" (FSU) and RSU-5, "
NVH Troubleshooting Chart
" (RSU)
WT-3, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
FAX -4, "
NVH Troubleshooting Chart
" (FAX) and RAX-4, "
NVH Troubleshooting Chart
" (RAX)
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and suspected parts
Rough gear tooth
Improper gear contact
Tooth surfaces worn
Incorrect backlash
Companion flange excessive runout
Improper gear oil
Propeller shaft
Axle and suspension
Tires
Road wheel
Drive axle
Brakes
Steering
Symptom Differential Noise×××××××××××××

FSU-4
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: August 20072004 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEES0010G
Use the chart below to help you find the cause of the symptom. Repair or replace parts as necessary.
x: ApplicableReference page
FSU-5FSU-10FSU-5FSU-5FSU-21FSU-6FSU-6FSU-6
PR-3, "
NVH Troubleshooting Chart
"
FFD-7, "
NVH Troubleshooting Chart
"
FAX -4, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible Cause and
SUSPECTED PARTS
Improper installation, looseness
Shock absorber deformation,
damage or deflection
Bushing or mounting deterioration
Parts interference
Spring fatigue
Suspension looseness
Incorrect wheel alignment
Stabilizer bar fatigue
PROPELLER SHAFT
DIFFERENTIAL
AXLE
TIRES
ROAD WHEEL
BRAKES
STEERING
SymptomNoise× × ×××× × × × × × ××
Shake×××× × × ×××××
Vib ratio n××××× × ×× ×
Shimmy× × ×× × × × × ××
Shudder××× ×××××
Poor quality ride or handling××××× ×× ×××

GENERAL MAINTENANCE
MA-5
C
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MA
B
MA
Revision: August 20072004 QX56
UNDER THE HOOD AND VEHICLE
The maintenance items listed here should be checked periodically (e.g. each time you check the engine oil or refuel).BrakesCheck that the brake does not pull the vehicle to one side when applied. —
Brake pedal and
boosterCheck the pedal for smooth operation and make sure it has the proper distance
under it when depressed fully. Check the brake booster function. Keep the floor
mats away from the pedal.BR-6, "
Inspection and
Adjustment", BR-17,
"On-Vehicle Service"
Parking brakeCheck that the parking brake control has the proper travel and make sure that
the vehicle is held securely on a fairly steep hill when only the parking brake is
applied.PB-3, "On-Vehicle Ser-
vice"
Automatic transmis-
sion “Park” mecha-
nismOn a fairly steep hill check that the vehicle is held securely with the selector
lever in the P position without applying the brakes. — ItemReference page
ItemReference page
Windshield washer
fluidCheck that there is adequate fluid in the tank.
—
Engine coolant levelCheck the coolant level when the engine is cold.MA-12
Radiator and hosesCheck the front of the radiator and clean off any dirt, insects, leaves, etc., that
may have accumulated. Make sure the hoses have no cracks, deformation,
deterioration or loose connections.—
Brake fluid levelMake sure that the brake fluid level is between the “MAX” and “MIN” lines on the
reservoirsMA-27
BatteryCheck the fluid level in each cell. It should be between the “MAX” and “MIN”
lines. Vehicles operated in high temperatures or under severe conditions require
frequent checks of the battery fluid level.—
Engine drive beltMake sure that no belt is frayed, worn, cracked or oily.MA-12
Engine oil levelCheck the level on the dipstick after parking the vehicle on a level spot and turn-
ing off the engine.MA-16
Power steering fluid
level and linesCheck the level on the reservoir with the engine off. Check the lines for improper
attachment, leaks, cracks, etc.MA-29
Automatic transmis-
sion fluid levelCheck the level on the dipstick after putting the selector lever in “P” with the
engine idling.MA-21
Exhaust systemMake sure there are no loose supports, cracks or holes. If the sound of the
exhaust seems unusual or there is a smell of exhaust fumes, immediately locate
the trouble and correct it.MA-21
UnderbodyThe underbody is frequently exposed to corrosive substances such as those
used on icy roads or to control dust. It is very important to remove these sub-
stances, otherwise rust will form on the floor pan, frame, fuel lines and around
the exhaust system. At the end of winter, the underbody should be thoroughly
flushed with plain water, being careful to clean those areas where mud and dirt
can easily accumulate.—
Fluid leaksCheck under the vehicle for fuel, oil, water or other fluid leaks after the vehicle
has been parked for a while. Water dripping from the air conditioner after use is
normal. If you should notice any leaks or gasoline fumes are evident, check for
the cause and correct it immediately.—

PB-1
PARKING BRAKE SYSTEM
F BRAKES
CONTENTS
C
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M
SECTION PB
A
B
PB
Revision: August 20072004 QX56 PREPARATION ........................................................... 2
Commercial Service Tools ........................................ 2
PARKING BRAKE SYSTEM ...................................... 3
On-Vehicle Service ................................................... 3
PEDAL STROKE ................................................... 3
INSPECTION ........................................................ 3
ADJUSTMENT ...................................................... 3
PARKING BRAKE CONTROL ................................... 4
Components ............................................................. 4
Removal and Installation .......................................... 4
REMOVAL ............................................................. 4
INSTALLATION ..................................................... 5PARKING BRAKE SHOE ........................................... 6
Removal and Installation .......................................... 6
COMPONENTS ..................................................... 6
REMOVAL ............................................................. 6
INSPECTION AFTER REMOVAL ......................... 7
INSTALLATION ..................................................... 7
SERVICE DATA AND SPECIFICATIONS (SDS) ........ 9
Parking Drum Brake ................................................. 9
Parking Brake Control .............................................. 9

PB-6
PARKING BRAKE SHOE
Revision: August 20072004 QX56
PARKING BRAKE SHOEPFP:44060
Removal and InstallationEFS003Q7
COMPONENTS
REMOVAL
WAR NIN G:
Clean the brakes with a vacuum dust collector to minimize the hazard of airborne particles or other
materials.
NOTE:
Remove the disc rotor only with the parking brake pedal completely disengaged.
1. Remove the rear disc rotor. Refer to BR-28, "
Removal and Installation of Brake Caliper Assembly and
Disc Rotor" .
2. Remove the rear drive shaft. Refer to RAX-7, "
Removal and Installation" .
3. Disconnect ABS sensor at harness connector. Then remove ABS sensor wire from grommet mounts.
4. Remove wheel hub and bearing assembly. Refer to RAX-5, "
Removal and Installation" .

Withdraw ABS sensor harness through back plate when removing wheel hub and bearing assembly.
5. Remove the return springs.
6. Remove the adjuster.
7. Remove the retainers, anti-rattle pins and shoes.
8. Disconnect the parking brake cable from the toggle lever.
9. Remove back plate.
1. Back plate 2. Shoes 3. Toggle lever
4. Return springs 5. Retainers 6. Adjuster
7. Anti-rattle pins
WFIA0164E

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
PR-3
C
E
F
G
H
I
J
K
L
MA
B
PR
Revision: August 20072004 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS002JY
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
PR-4
(front)
PR-8 (rear)
PR-4 (front)
PR-8 (rear)
PR-4 (front)
PR-8 (rear)
FFD-7, "
NVH Troubleshooting Chart
" (front)
RFD-5, "
NVH Troubleshooting Chart
" (rear)
FA X-4, "
NVH Troubleshooting Chart
" (front)
RAX-4, "
NVH Troubleshooting Chart
" (rear)
FSU-4, "
NVH Troubleshooting Chart
" (front)
RSU-5, "
NVH Troubleshooting Chart
" (rear)
WT-3, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
FA X-4, "
NVH Troubleshooting Chart
" (front)
RAX-4, "
NVH Troubleshooting Chart
" (rear)
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and suspected parts
Uneven rotation torque
Rotation imbalance
Excessive run out
Differential
Axle
Suspension
Tire s
Road wheel
Drive shaft
Brakes
Steering
SymptomNoise×××××××××××
Shake×××××××
Vibration××× ××× × ×

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
PS-5
C
D
E
F
H
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J
K
L
MA
B
PS
Revision: August 20072004 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEGS000MM
Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
PS-6PS-6PS-20PS-20PS-20PS-6PS-7PS-7EM-12PS-7PS-13PS-15PS-11PS-10PS-15
PR-3, "
NVH Troubleshooting Chart
"
FFD-7, "
NVH Troubleshooting Chart
"
FA X-4, "
NVH Troubleshooting Chart
"
FSU-4, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
FA X-4, "
NVH Troubleshooting Chart
"
BR-5, "
NVH Troubleshooting Chart
"
Possible cause and sus-
pected parts
Fluid level
Air in hydraulic system
Outer socket ball joint swinging force
Outer socket ball joint rotating torque
Outer socket ball joint end play
Steering fluid leakage
Steering wheel play
Steering gear rack sliding force
Drive belt looseness
Improper steering wheel
Improper installation or looseness of tilt lock lever
Mounting rubber deterioration
Steering column deformation or damage
Improper installation or looseness of steering column
Steering linkage looseness
PROPELLER SHAFT
FRONT FINAL DRIVE
WHEEL HUB
FRONT SUSPENSION
TIRES
ROAD WHEEL
DRIVE SHAFT
BRAKES
SymptomNoise× × ××××× × × ××××××× ×
Shake××× × ××××× ×
Vibration××××× × ××× ×
Shimmy××× × ×××× ×
Shudder× × ×××× ×

RAX-4
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: August 20072004 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS001AS
Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
—
RAX-8—
RAX-5—
RFD-5, "
NVH Troubleshooting Chart
"
FAX -4, "
NVH Troubleshooting Chart
" (FAX), FSU-4, "
NVH Troubleshooting Chart
" (FSU)
RSU-5, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
PR-3, "
NVH Troubleshooting Chart
"
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Excessive joint angle
Joint sliding resistance
Imbalance
Improper installation, looseness
Parts interference
DIFFERENTIAL
FRONT AXLE AND FRONT SUSPENSION
REAR SUSPENSION
TIRES
ROAD WHEEL
PROPELLER SHAFT
BRAKES
STEERING
SymptomNoise×× ×× ×× ×××××
Shake× × ×× × ×××××
Vibration×× ×× × × × ×
Shimmy×× ×××××
Shudder× × ×× ××
Poor quality ride or handling×× ×× ×× ×