Nissan Pathfinder (2008 year). Manual — part 577

POWER STEERING FLUID

ST-11

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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.

Repeat step 3 several times at about three second intervals.

5.

Check for air bubbles, cloudy fluid and fluid leakage.

6.

If air bubbles or cloudiness exists, perform steps 3 and 4 again until air bubbles and cloudiness do not
exist.

7.

Stop the engine and check fluid level.

ST-12

< ON-VEHICLE MAINTENANCE >

STEERING WHEEL

STEERING WHEEL

On-Vehicle Inspection and Service

INFOID:0000000001297935

CHECKING CONDITION OF INSTALLATION

• Check the installation condition of the steering gear assembly, front suspension, axle and steering column.
• Check if movement exists when the steering wheel is pushed up and down, left and right and in the axial

direction.

• Check if the mounting nuts for the steering gear assembly are

loose. Refer to

ST-22, "Removal and Installation"

.

CHECKING STEERING WHEEL PLAY

1.

Turn the tires straight ahead and start the engine. Lightly turn the steering wheel left and right to the point
where the tires start moving, and measure the distance that the outer circumference of the steering wheel
travels.

CHECKING NEUTRAL POSITION ON STEERING WHEEL

• Check the neutral position on the steering wheel after confirming the front wheel alignment is correct. Refer

to

FSU-5, "Front Wheel Alignment"

.

1.

Turn the tires straight ahead, check if the steering wheel is in the neutral position.

2.

If it is not in the neutral position, remove the steering wheel and reinstall it correctly on the steering stem,
within two teeth of the original position.

3.

If the neutral position cannot be attained by repositioning the steering wheel within two teeth on the steer-
ing stem, loosen the tie-rod lock nuts of the steering outer sockets, then adjust the tie-rods by the same
amount in the opposite direction of the steering wheel.

CHECKING STEERING WHEEL TURNING FORCE

1.

Park vehicle on a level, dry surface and set parking brake.

2.

Start engine.

3.

Bring the power steering fluid up to adequate operating temperature. Make sure the fluid temperature is
approximately 50

°

– 80

°

C (122

°

– 176

°

F).

4.

Tires need to be inflated to specified pressure. Refer to

WT-40, "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

ST-22, "Removal and Installation"

.

End play of the axle 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

STEERING WHEEL

ST-13

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• Power steering oil pump. Refer to

ST-14, "On-Vehicle Inspection and Service"

.

7.

If steering column and power steering oil pump meet specifications, inspect steering gear and replace as
necessary. Refer to

ST-22, "Removal and Installation"

.

CHECKING FRONT WHEEL TURNING ANGLE

When checking the front wheel turning angle, refer to

FSU-23, "Wheel Alignment (Unladen*1)"

.

ST-14

< ON-VEHICLE REPAIR >

POWER STEERING OIL PUMP

ON-VEHICLE REPAIR

POWER STEERING OIL PUMP

On-Vehicle Inspection and Service

INFOID:0000000001297923

CHECKING RELIEF OIL PRESSURE

CAUTION:

Before starting work, confirm that the belt tension is within specification. Refer to

EM-13, "Checking

Drive Belts"

(VQ40DE),

EM-153, "Checking Drive Belts"

(VK56DE).

1.

Connect the Tool between the power steering oil pump dis-
charge connector and the high pressure hose, then bleed the air
from the hydraulic circuit. Refer to

ST-10, "Air Bleeding Hydrau-

lic System"

.

2.

Start the engine. Run the engine until the power steering fluid temperature in reservoir tank reaches 50 –
80

°

C (122 – 176

°

F).

CAUTION:

• Warm up the engine with the shut-off valve fully opened. If the engine is started with the shut-off

valve closed, fluid pressure in the power steering oil pump increases to maximum pressure.
This will raise fluid temperature excessively.

• Do not contact the belt with the hose while the engine is running.

3.

With the engine at idle, close the shut-off valve and read the relief oil pressure.

CAUTION:

Do not close the shut-off valve of the pressure gauge for more than 10 seconds.

4.

After measurement, open the shut-off valve slowly.
• If relief oil pressure is outside the specification, replace the power steering oil pump. Refer to

ST-24,

"Removal and Installation"

.

5.

After inspection, disconnect the oil pressure gauge and oil pressure gauge adapter from the hydraulic cir-
cuit, then connect the power steering oil pump discharge connector. Add fluid and bleed the air from the
hydraulic circuit thoroughly. Refer to

ST-10, "Air Bleeding Hydraulic System"

.

Tool number:

Pressure gauge and shut-off valve

KV48103500
(J-26357 and J-26357-10)

Oil pump side

Connector A and O-
ring

KV48105300-4 and 5295262U10
(

—

)

Eye-bolt and O-ring

KV48105300-3 and 5295262U00
(

—

)

High pressure pip-
ing side

Connector B and O-
ring

KV48105300-1 and 5295262U00
(

—

)

Nut

KV48105300-2
( — )

WGIA0129E

Relief oil pressure

: 8.0 – 8.8 mPa (81.60 – 89.76 kg/cm

2

, 1160.0 – 1276.0 psi)

STEERING WHEEL

ST-15

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REMOVAL AND INSTALLATION

STEERING WHEEL

On-Vehicle Inspection and Service

INFOID:0000000001297917

CHECKING CONDITION OF INSTALLATION

• Check the installation condition of the steering gear assembly, front suspension, axle and steering column.
• Check if movement exists when the steering wheel is pushed up and down, left and right and in the axial

direction.

• Check if the mounting nuts for the steering gear assembly are

loose. Refer to

ST-22, "Removal and Installation"

.

CHECKING STEERING WHEEL PLAY

1.

Turn the tires straight ahead and start the engine. Lightly turn the steering wheel left and right to the point
where the tires start moving, and measure the distance that the outer circumference of the steering wheel
travels.

CHECKING NEUTRAL POSITION ON STEERING WHEEL

• Check the neutral position on the steering wheel after confirming the front wheel alignment is correct. Refer

to

FSU-5, "Front Wheel Alignment"

.

1.

Turn the tires straight ahead, check if the steering wheel is in the neutral position.

2.

If it is not in the neutral position, remove the steering wheel and reinstall it correctly on the steering stem,
within two teeth of the original position.

3.

If the neutral position cannot be attained by repositioning the steering wheel within two teeth on the steer-
ing stem, loosen the tie-rod lock nuts of the steering outer sockets, then adjust the tie-rods by the same
amount in the opposite direction of the steering wheel.

CHECKING STEERING WHEEL TURNING FORCE

1.

Park vehicle on a level, dry surface and set parking brake.

2.

Start engine.

3.

Bring the power steering fluid up to adequate operating temperature. Make sure the fluid temperature is
approximately 50

°

– 80

°

C (122

°

– 176

°

F).

4.

Tires need to be inflated to specified pressure. Refer to

WT-40, "Tire"

.

End play of the axle direction for steering wheel

: 0 mm (0 in)

LGIA0024E

Steering wheel play on the outer circumference

: 0

−

35 mm (0

−

1.38 in)

ST-16

< REMOVAL AND INSTALLATION >

STEERING WHEEL

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

ST-17, "Removal and Installation"

.

• Power steering oil pump. Refer to

ST-14, "On-Vehicle Inspec-

tion and Service"

.

7.

If steering column and power steering oil pump meet specifications, replace steering gear. Refer to

ST-22,

"Removal and Installation"

.

CHECKING FRONT WHEEL TURNING ANGLE

When checking the front wheel turning angle, refer to

FSU-5, "Front Wheel Alignment"

.

Removal and Installation

INFOID:0000000001297918

REMOVAL

1.

Set the front wheels in the straight-ahead position.

2.

Remove the driver air bag module. Refer to

SR-4, "Removal and Installation"

.

3.

Disconnect the steering wheel switches and heated steering wheel connector.

4.

Remove the steering wheel center nut.

5.

Remove the steering wheel, using Tools.

6.

Inspect the steering wheel near the puller holes for damage. If
damage is found, replace the steering wheel.
• Remove the steering wheel rear cover and steering wheel

switches, if required.

CAUTION:

Place a piece of tape across the spiral cable so it will not be
rotated out of position.

INSTALLATION

Installation is in the reverse order of removal.
• Align spiral cable correctly when installing steering wheel. Make

sure that the spiral cable is in the neutral position. The neutral
position is detected by turning left 2.6 revolutions from the right
end position and ending with the locating pin at the top.

• If equipped with VDC, refer to

BRC-131, "ADJUSTMENT OF

STEERING ANGLE SENSOR NEUTRAL POSITION : Special
Repair Requirement"

for steering angle sensor adjustment.

• After the work is completed, perform self-diagnosis to make sure

no malfunction is detected. Refer to

SRC-13, "SRS Operation

Check"

.

• Tighten steering wheel center nut to specification. Refer to

ST-17,

"Removal and Installation"

.

CAUTION:

• The spiral cable may snap due to steering operation if the cable is not installed in the correct posi-

tion.

• With the steering linkage disconnected, the cable may snap by turning the steering wheel beyond

the limited number of turns. The spiral cable can be turned counterclockwise about 2.5 turns from
the neutral position.

Tool number

:

—

(J-44372)

Steering wheel
turning force

: 39 N (4 kg-f, 9 lb-f) or less

WGIA0035E

Tool number

A: KV481J0010 (J-1859A)

B: KV481J0020 (J-42578)

WHIA0124E

PHIA0275E

STEERING COLUMN

ST-17

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STEERING COLUMN

Removal and Installation

INFOID:0000000001297919

CAUTION:

• Do not exert any axial load or impact to the steering column.
• Do not move the steering gear while the steering column assembly is removed.

REMOVAL

1.

Remove the spiral cable with the combination switches attached from the steering column assembly.
Refer to

SR-6, "Removal and Installation"

.

2.

Remove the lower instrument panel LH. Refer to

IP-10, "Removal and Installation"

.

3.

Remove the steering column cover and ignition key finisher. Refer to

IP-10, "Removal and Installation"

.

4.

Remove the lower knee protector. Refer to

IP-10, "Removal and Installation"

.

1.

Driver air bag module

2.

Steering wheel center nut

3.

Steering wheel

4.

Combination switch and spiral cable 5.

Steering column assembly and igni-
tion switch

6.

Collar

7.

Hole cover seal

8.

Clamp

9.

Hole cover mounting plate

10. Hole cover

11. Upper joint

12. Upper shaft

13. Boot clamp

14. Lower joint shaft

15. Boot and clips (plastic)

WGIA0125E

ST-18

< REMOVAL AND INSTALLATION >

STEERING COLUMN

5.

Remove the lock nut and bolt from the upper joint, then separate
the upper joint from the upper shaft.

CAUTION:

• Do not reuse the lock nut.

6.

Remove the three nuts and bolt from the steering column
assembly, then remove the steering column assembly from the
steering member.

7.

Remove the hole cover seal and clamp.

8.

Remove the hole cover nuts, then remove the hole cover from
the dash panel.

9.

Remove the bolt from the lower joint of the lower joint shaft, then
remove the lower joint shaft from the vehicle.

CAUTION:

• Do not damage the lower joint.

INSPECTION AFTER REMOVAL

• Check for damage to the steering column jacket tube. If damage is found, replace the steering column with a

new one.

CAUTION:

• Do not exert any axial load or impact to the steering column.
• Replace the column if it is depleted of grease, worn, damaged, or if any scratches or coating sepa-

ration is present on the shaft seal area.

• If the vehicle has been in a collision, or if noises are heard coming

from the steering column, check column length “L1” and “L2” as
shown. If out of specification, replace the steering column as an
assembly.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

LGIA0027E

LGIA0028E

LGIA0029E

Steering column length

L1

: 165.1 mm (6.500 in)

L2

: 258.0 mm (10.16 in)

SGIA0475E