Nissan Altima L32. Manual - part 187

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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.

Reference page

CL

-6

CL

-7

CL

-1

3

EM-72

 (QR25DE),

EM-202

 (VQ35DE)

CL

-1

7

CL

-1

5

CL

-1

5

CL

-1

5

CL

-1

5

CL

-1

5

CL

-1

5

CL

-1

5

CL

-1

4

CL

-1

4

CL

-1

4

EM-76

 (QR2

5DE), 

EM-206

(VQ35DE)

SUSPECTED PARTS (Possible cause)

CL

UTCH PEDAL

 (In

sp

ec

tio

n 

an

d a

dj

us

tm

ent

)

CLUTCH LINE (Air in line)

CSC (Co

nc

en

tr

ic

 sl

av

e 

cy

lin

d

er) (W

orn

, d

irt

y o

r 

da

ma

ge

d)

EN

GIN

E

 M

O

UNTIN

G (Lo

o

se

)

CLUTCH DISC (Out of true)

CLUTCH DISC (Runou

t i

s e

xce

ss

iv

e)

CLUTCH DISC (L

in

in

g b

rok

en

)

CLUTCH DISC (Dirty or burned)

CLUTCH DISC (Oily)

CLUTCH DISC (W

orn out)

CLUTCH DISC (Hardened)

CLUTCH DISC (Lack 

of

 sp

lin

e 

gre

as

e)

DIAPHRAGM S

P

RING (Damaged)

DI

APHRAG

M

 S

P

RING

 (O

ut 

of 

tip

 al

ig

nm

en

t)

P

R

E

SSURE PLA

T

E (Distortion)

F

LYWHEEL (Distortion)

Symptom

Clutch grabs/chatters

1

2

2

2

2

2

Clutch pedal spongy

1

Clutch noisy

1

Clutch slips

1

2

2

3

4

5

Clutch does not disengage

1

2

4

5

5

5

5

5

5

6

6

7

PRECAUTIONS

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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 Necessary for Steering Wheel Rotation after Battery Disconnect

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NOTE:

• Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-

tion, then disconnect both battery cables.

• After finishing work, confirm that all control unit connectors are connected properly, then re-connect both

battery cables.

• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.

If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.

This vehicle is equipped with a push-button ignition switch and a steering lock unit.

If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.

If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure

below before starting the repair operation.

OPERATION PROCEDURE

1. Connect both battery cables.

NOTE:

Supply power using jumper cables if battery is discharged.

2. Carry the Intelligent Key or insert it to the key slot and turn the push-button ignition switch to ACC position.

(At this time, the steering lock will be released.)

3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon-

nected and the steering wheel can be turned.

4. Perform the necessary repair operation.
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn

the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering

wheel will lock when the push-button ignition switch is turned to LOCK position.)

6. Perform self-diagnosis check of all control units using CONSULT-III.

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< PRECAUTION >

PRECAUTIONS

Precaution for Procedure without Cowl Top Cover

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When performing the procedure after removing cowl top cover, cover

the lower end of windshield with urethane, etc.

Service Notice or Precautions

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• Always use recommended fluid. Refer to 

MA-12, "Fluids and Lubricants"

.

• Never 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.

• Never 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.

PIIB3706J

SBR686C

PREPARATION

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< PREPARATION >

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PREPARATION

PREPARATION

Special Service Tools

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The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Commercial Service Tools

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Tool number
(Kent-Moore No.)
Tool name

Description

ST20050240
(

—

)

Diaphragm adjusting wrench

Adjusting unevenness of diaphragm spring of 
clutch cover

KV30101000
(

—

)

Clutch aligning bar

Installing clutch disc
a: 15.9 mm (0.626 in) dia.
b: 17.9 mm (0.705 in) dia.
C: 40 mm (1.57 in) dia.

ZZA0508D

NT405

Tool name

Description

1.

Flare nut crowfoot

2.

Torque wrench

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

Power tool

Loosening bolts and nuts

S-NT360

PBIC0190E