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  • Service Technician Workbook

    Noise, Vibration, & HarshnessDiagnosis and Repair

    GITC9980A

    REVISED SEPTEMBER, 2011

  • ii

    This book is designed for instructional use only for authorized Nissan North America, Inc. and Nissan dealer personnel. For additional information contact:

    Nissan North America, Inc. Technical Training P.O. Box 685001 Franklin, TN 37068

    2011 Nissan North America, Inc.

    All rights reserved. No part of this publication may be reproduced in any form without the prior written permission of the publisher.

    Revised Printing: September, 2011

    Training Department

    Technical Training

    Nissan North America, Inc. reserves the right to alter specifications or methods at any time.

    This manual uses post consumer recycled fibers

    Nissan North America, Inc.Training Department

    Technical Training

  • NOISE, VIBRATION AND HARSHNESS TABLE OF CONTENTS

    Section 1: Text

    Noise, Vibration and Harshness................................................................................................. 1

    Squeak and Rattle Resources..................................................................................................... 2

    NVH Troubleshooting Charts ...................................................................................................................2

    Squeak and Rattle Work Flow .................................................................................................................3

    Squeak and Rattle Diagnostic Worksheet ............................................................................................4

    ASIST.............................................................................................................................................................6

    Virtual Academy ............................................................................................................................... 7

    SIR Videos.................................................................................................................................................. 7

    Vibration Fundamentals ............................................................................................................... 8

    Vibration Elements.................................................................................................................................... 8

    Cycle, Amplitude and Frequency .......................................................................................................... 9

    Frequency Chart...................................................................................................................................... 11

    Resonance................................................................................................................................................ 12

    Masking ..................................................................................................................................................... 12

    Vibration Dampers .................................................................................................................................. 12

    Origins of Vibrations.................................................................................................................... 14

    Vibration Order .........................................................................................................................................14

    Vibration Caused by Combustion ........................................................................................................15

    Misfire Order of Vibration.......................................................................................................................16

    Vibration Frequency..................................................................................................................... 17

    Calculating Engine Order of Vibration ............................................................................................... 17

    Driveline Order of Vibration .................................................................................................................. 17

    Wheel and Tire Vibration Frequency .................................................................................................. 18

    Summary of typical Vibration Frequencies.........................................................................................18

    iii

  • NVH Diagnostic Tools................................................................................................................... 19

    Sirometer ...................................................................................................................................................19

    Electronic Vibration Analyzer.................................................................................................................19

    EVA Components and Operation Description ..................................................................................20

    Steelman Engine Ear...............................................................................................................................26

    Steelman Chassis Ear.............................................................................................................................27

    Digital Inclinometer ..................................................................................................................................29

    ASIST..........................................................................................................................................................30

    Isolating Engine & Driveline Noises and Vibrations........................................................... 31

    Engine Related Noises .......................................................................................................................... 31

    Engine Vibrations .................................................................................................................................... 31

    Driveshaft Noises and Vibration .......................................................................................................... 32

    Rebro Joint Inspection ........................................................................................................................... 34

    CV Driveshaft Inspection........................................................................................................................34

    Propshaft Imbalance................................................................................................................................35

    Propshaft Runout .....................................................................................................................................36

    Propshaft Balancing ................................................................................................................................36

    Propshaft Angles......................................................................................................................................39

    Inspecting the Center Bearing..............................................................................................................41

    1 and 2 Piece Driveshaft (propshaft) Working Angles ...................................................................42

    2nd Order Driveshaft Vibration.............................................................................................................43

    Lateral Driveshaft Alignment..................................................................................................................43

    Isolating Tire and Road Noises ................................................................................................ 45

    Tire Related Noises ................................................................................................................................ 46

    Radial Force Variation .............................................................................................................................47

    Hunter GSP9700 ....................................................................................................................................48

    RFV Measurement ...................................................................................................................................49

    Matchmaker...............................................................................................................................................50

    iv

  • Brake Noise ..................................................................................................................................... 51

    Repairing Brake Noise............................................................................................................................52

    Corrective Action Chart..........................................................................................................................54

    Wind Noise and Turbulence....................................................................................................... 56

    Air Leaks ....................................................................................................................................................56

    Sun Roof ..................................................................................................................

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