Nissan Xterra. Manual - part 167

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< SYMPTOM DIAGNOSIS >

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

SYMPTOM DIAGNOSIS

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NVH Troubleshooting Chart

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Use the chart below to help you find the cause of the symptom. The numbers indicate the order of the inspec-

tion. If necessary, repair or replace these parts.

CLUTCH

Reference page

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CL-9

CL-10

EM-99

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EM-1

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SUSPECTED PARTS (Possible cause)

CLUTCH P

E

DAL (Free play

 o

ut

 of

 ad

ju

st

me

nt

)

CLUTCH LINE (A

ir in line)

MAS

T

ER CYLINDER PIS

T

ON CUP (Damaged)

OPERA

T

ING CYLINDER PIST

ON CUP (Damaged)

ENGINE MOU

NTING (Loose)

RELEA

SE BEA

RI

NG 

(W

o

rn,

 di

rty 

or d

am

ag

ed

)

CLUTCH DISC (Out 

of 

true)

CLUTCH DISC (Runou

t i

s ex

ce

ssi

ve

)

CLUTCH DISC (Lining 

broken)

CLUTCH DISC (Dirty or burned)

CLUTCH DISC (Oily)

CLUTCH DISC (W

orn 

out)

CLUTCH DISC (Hardened)

CLUTCH DISC (Lack 

of

 sp

lin

e gre

ase)

DI

APHRAGM SPRI

N

G (Dam

ag

ed

)

DIAPHRAGM

 SPRING (Ou

t of

 ti

p a

lig

nm

en

t)

PRESSURE P

LA

T

E (Di

storti

on)

FL

YWHEE

L (Distortion)

Symptom

Clutch grabs/chatters

1

2

2

2

2

2

Clutch pedal spongy

1

2

2

Clutch noisy

1

Clutch slips

1

2

2

3

4

5

Clutch  does  not  disengage

1

2

3

4

5

5

5

5

5

5

6

6

7

PRECAUTIONS

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< PRECAUTION >

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

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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 SR 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 performed by

an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag

Module, see the SR 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 har-

ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-

tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a

hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing

serious injury.

• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the

battery and wait at least three minutes before performing any service.

Service Notice or Precautions

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• Always use recommended fluid. Refer to 

MA-12, "Fluids and Lubricants"

.

• Do not reuse drained fluid.

• Be careful not to splash fluid on painted areas.

• When removing and installing clutch piping, use tool.

• Use new fluid to clean or wash all parts of master cylinder.

• Do not use mineral oils such as gasoline or kerosene. It will ruin

the rubber parts of the hydraulic system.

WARNING:

After cleaning clutch disc, wipe it with a dust collector. Do not

use compressed air.

SBR686C

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< PREPARATION >

PREPARATION

PREPARATION

PREPARATION

Special Service Tool

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The actual shape of the tools may differ from those illustrated here.

Commercial Service Tool

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Tool number
(TechMate No.)
Tool name

Description

ST20050240
( — )
Diaphragm adjusting wrench

Adjusting unevenness of diaphragm spring of 
clutch cover

ST20630000
(J-26366)
Clutch aligning bar

Installing clutch disc
a: 15.8 mm (0.622 in) dia.
b: 22.9 mm (0.902 in) dia.

ZZA0508D

ZZA1178D

Tool name

Description

Power tool

Loosening nuts, screws and bolts

1. Flare nut crowfoot
2. Torque wrench

Removing and installing clutch piping
a: 10 mm (0.39 in)

PIIB1407E

S-NT360

PREPARATION

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< PREPARATION >

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Bearing puller

Removing release bearing

Bearing drift

Installing release bearing
a: 52 mm (2.05 in) dia.
b: 45 mm (1.77 in) dia.

Tool name

Description

NT077

NT474