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Nissan Titan A60. Manual - part 892

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING

ST-5

< SYMPTOM DIAGNOSIS >

SYMPTOM DIAGNOSIS

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING

NVH Troubleshooting Chart

INFOID:0000000006164496

Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.

×: Applicable

Reference page

(2F1

0),

DLN

-139

(2S1

0),

, (3S1

Possible cause and sus-
pected parts

lui

d l

r i

dra

lic sy

tee

rin

g o

er s

ll j

swin

rce

tee

rin

g o

er socket

ll j

rot

tin

torq

eri

r so

cke

bal

l jo

d pl

ower

ste

eri

uid

ring

whe

l pl

teering wheel t

urning force

Dri

loo

sen

pro

ring

rop

er i

tal

tio

n o

r lo

s of

til

t lo

ing

er d

erio

rat

ion

tee

rin

g c

lum

form

ion

r da

rop

er i

tal

tio

n o

r lo

s of

ring

olu

eri

e l

OPE

LLE

R SHAFT

FRO

NT FINAL

DRIVE

EEL H

PENSION

ROAD W

EEL

DRIV

E SHAFT

Symptom

Noise

× ×

Shake

× ×

Vibration

Shimmy

Shudder

ST-6

< PERIODIC MAINTENANCE >

POWER STEERING FLUID

PERIODIC MAINTENANCE

POWER STEERING FLUID

Checking Fluid Level

INFOID:0000000006164497

Check fluid level, referring to the scale on reservoir tank.

Use HOT range for power steering fluid temperatures of 50

° – 80°C

(122

° – 176°F).

Use COLD range for power steering fluid temperatures of 0

° – 30°C

(32

° – 86°F).

CAUTION:

• Do not overfill.

• Do not reuse any used power steering fluid.

• Recommended power steering fluid is Genuine NISSAN PSF

or equivalent. Refer to

MA-21, "FOR NORTH AMERICA : Fluids

and Lubricants"

North America,

MA-22, "FOR MEXICO : Fluids

and Lubricants"

Mexico.

Checking Fluid Leakage

INFOID:0000000006164498

Check the hydraulic piping lines for improper attachment and for

leaks, cracks, damage, loose connections, chafing or deterioration.
1. Run engine until power steering fluid temperature reaches 50

° –

°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 power steering fluid leakage at connections is noticed, then loosen flare nut and then retighten. Do not

over tighten connector as this can damage O-ring, washer and connector.

5. If power steering fluid leakage from oil pump is noticed, check power steering oil pump. Refer to

ST-10

6. Check steering gear boots for accumulation of power steering fluid indicating a leak from the power steer-

ing gear.

Air Bleeding Hydraulic System

INFOID:0000000006164499

Incomplete air bleeding causes the following. When this happens, bleed air again.

• Air bubbles in reservoir tank.

• Clicking noise in power steering oil pump.

• Excessive buzzing in power steering oil pump.

NOTE:

When vehicle is stationary or while steering wheel is being turned slowly, some noise may be heard from

power steering oil pump or the power steering 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 power steering 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 power steering 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 the power steering oil pump may be damaged.)

4. Check for air bubbles or cloudy fluid.

LGIA0021E

SGIA0506E

POWER STEERING FLUID

ST-7

< PERIODIC MAINTENANCE >

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 power steering fluid level.

ST-8

< REMOVAL AND INSTALLATION >

STEERING WHEEL

REMOVAL AND INSTALLATION

STEERING WHEEL

On-Vehicle Inspection and Service

INFOID:0000000006164500

CHECKING CONDITION OF INSTALLATION

• Check installation condition of power 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 nuts for power steering gear assembly are loose.

Refer to

ST-17

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-50, "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

steering column. Refer to