2006 INFINITI QX56 Factory Service Manual

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Page 2737 of 3383

INFINITI QX56 2006 Factory Service Manual PS-4
PREPARATION
Revision: November 20092006 QX56
Commercial Service ToolsEGS00122
KV40107300
(— ) Crimping boot bands
—
(J-44372)
Spring gauge Measuring steering wheel turning force
Tool number
(

Page 2738 of 3383

INFINITI QX56 2006 Factory Service Manual NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPS-5
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Revision: November 2009 2006 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting

Page 2739 of 3383

INFINITI QX56 2006 Factory Service Manual PS-6
POWER STEERING FLUID
Revision: November 20092006 QX56
POWER STEERING FLUIDPFP:KLF20
Checking Fluid LevelEGS000U9
Check power steering fluid level with engine off, referring to the scale
on reserv

PS-6
POWER STEERING FLUID
Revision: November 20092006 QX56
POWER STEERING FLUIDPFP:KLF20
Checking Fluid LevelEGS000U9
Check power steering fluid level with engine off, referring to the scale
on reservoir tank.
Use HOT range for fluid temperatures of 50° – 80 °C (122 ° – 176° F).
Use COLD range for fluid temperatures of 0 ° – 30° C (32 ° – 86 °F).
CAUTION:
Do not overfill.
Do not reuse any used power steering fluid.
Recommended fluid is Genuine NISSAN PSF or equivalent.
Refer to MA-11, "
RECOMMENDED FLUIDS AND LUBRI-
CANTS" .
Checking Fluid LeakageEGS000UA
Check the hydraulic piping lines for improper attachment and for
leaks, cracks, damage, loose connections, chafing or deterioration.
1. Run engine until fluid temperature reaches 50 ° – 80 °C (122 ° –
176° F) in reservoir tank. Keep engine speed idle.
2. Turn steering wheel right-to-left several times.
3. Hold steering wheel at each “lock” position for five seconds to
check fluid leakage.
CAUTION:
Do not hold steering wheel in a locked position for more
than 10 seconds. (There is the possibility that oil pump may
be damaged.)
4. If fluid leakage at connections is noticed, then loosen flare nut and then retighten. Do not over tighten con- nector as this can damage O-ring, washer and connector.
5. If fluid leakage from oil pump is noticed, check oil pump. Refer to PS-21, "
POWER STEERING OIL
PUMP" .
6. Check steering gear boots for accumulation of fluid indicating a leak from the steering gear.
Air Bleeding Hydraulic SystemEGS000UB
Incomplete air bleeding causes the following. When this happens, bleed air again.
Air bubbles in reservoir tank.
Clicking noise in oil pump.
Excessive buzzing in oil pump.
NOTE:
When vehicle is stationary or while steering wheel is being turned slowly, some noise may be heard from
oil pump or gear. This noise is normal and does not affect any system.
1. Stop engine, and then turn steering wheel fully to right and left several times. CAUTION:
Do not allow steering fluid reservoir tank to go below the MIN level line. Check tank frequently and
add fluid as needed.
2. Run engine at idle speed. Turn steering wheel fully right and then fully left, hold for about three seconds. Then check for fluid leakage.
3. Repeat step 2 several times at about three second intervals. CAUTION:
Do not hold steering wheel in the locked position for more than 10 seconds. (There is the possibil-
ity that oil pump may be damaged.)
4. Check for air bubbles or cloudy fluid.
5. If air bubbles or cloudiness still exists, stop engine, perform steps 2 and 3 again until air bubbles or cloud- iness does not exist.
6. Stop engine, check fluid level.
LGIA0021E
SGIA0506E

Page 2740 of 3383

INFINITI QX56 2006 Factory Service Manual STEERING WHEELPS-7
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Revision: November 2009 2006 QX56
STEERING WHEELPFP:48430
On-Vehicle Inspection and ServiceEGS000UC
CHECKING CONDITION OF INSTALLATION
Check installation

STEERING WHEELPS-7
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Revision: November 2009 2006 QX56
STEERING WHEELPFP:48430
On-Vehicle Inspection and ServiceEGS000UC
CHECKING CONDITION OF INSTALLATION
Check installation condition of steering gear assembly, front suspension, axle and steering column.
Check if movement exists when steering wheel is moved up and down, to the left and right and to the axial
direction.
Check if the mounting nuts for steering gear assembly are loose.
Refer to PS-15, "
POWER STEERING GEAR AND LINKAGE" .
CHECKING STEERING WHEEL PLAY
1. Turn tires straight ahead, start engine, then turn steering wheel to the left and right lightly, and measure
steering wheel movement on the outer circumference when steering wheel is turned up to the point where
tires start moving.
CHECKING NEUTRAL POSITION ON STEERING WHEEL
Check neutral position on steering wheel after confirming that front wheel alignment is correct. Refer to
FSU-6, "
Front Wheel Alignment" .
1. Turn tires straight ahead, check if steering wheel is in the neutral position.
2. If it is not in the neutral position, remove steering wheel and reinstall it correctly.
3. If the neutral position cannot be attained by repositioning the steering wheel two teeth or less on steering stem, loosen tie-rod lock nuts of steering outer sockets, then adjust tie-rods by the same amount in the
opposite direction.
CHECKING STEERING WHEEL TURNING FORCE
1. Park vehicle on a level, dry surface and set parking brake.
2. Start engine.
3. Bring power steering fluid up to operating temperature of 60 ° – 80° C (140 ° – 176° F).
4. Tires need to be inflated to specified pressure. Refer to WT-38, "
Tire" .
5. Check steering wheel turning force using Tool when steering wheel has been turned 360 ° from the neutral position.
6. If steering wheel turning force is out of specification, inspect the following:
Steering column. Refer to PS-11, "INSPECTION AFTER
REMOVAL" .
Power steering oil pump. Refer to PS-21, "CHECKING
RELIEF OIL PRESSURE" .
7. If steering column and power steering oil pump meet specifications, replace steering gear. Refer to PS-15,
"Removal and Installation" .
End play of the axial direction for steering wheel : 0 mm (0 in)
LGIA0024E
Steering wheel play on the outer circumference : 0
− 35 mm (0 − 1.38 in)
Tool number : J-44372
Steering wheel
turning force : 39 N (4 kg-f, 9 lb-f) or less
WGIA0035E

Page 2741 of 3383

INFINITI QX56 2006 Factory Service Manual PS-8
STEERING WHEEL
Revision: November 20092006 QX56
CHECKING FRONT WHEEL TURNING ANGLE
When checking front wheel turning angle, refer to FSU-8, "FRONT WHEEL TURNING ANGLE" .
Removal and Installation

Page 2742 of 3383

INFINITI QX56 2006 Factory Service Manual TILT SYSTEMPS-9
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Revision: November 2009 2006 QX56
TILT SYSTEMPFP:48810
Removal and InstallationEGS000UE
TILT MOTOR AND TILT SENSOR
Removal
1. Remove the steering column cover

Page 2743 of 3383

INFINITI QX56 2006 Factory Service Manual PS-10
STEERING COLUMN
Revision: November 20092006 QX56
STEERING COLUMNPFP:48810
Removal and InstallationEGS000UF
CAUTION:
Do not exert any load or impact in the axial direction immediately before or

Page 2744 of 3383

INFINITI QX56 2006 Factory Service Manual STEERING COLUMNPS-11
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Revision: November 2009 2006 QX56
4. Remove lock nut and bolt, then separate upper shaft from upper
joint.
5. Remove two nuts and two bolts, then remove

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