Inspection and Verification (Start Testing Here)

This provides a working knowledge of the process of diagnosing Noise, Vibration and Harshness (NVH) conditions. The topics are based on the description of the condition. For example, if the condition is a shake that occurs at high speed, the most likely place to start is under High-Speed Shake in the symptom chart. The road test procedure will help you to sort the conditions into categories and distinguish a vibration from a shake. It also provides quick checks to help pinpoint or eliminate a cause.