How to Use This Diagnostic Procedure Section

^ Noise, Vibration and Harshness (NVH) concerns have become more important as vehicles have become more sensitive to these vibrations. This information is designed to aid in identifying these situations.
^ The section provides diagnostic procedures based on symptom. If the condition occurs at high speed, for instance, the most likely place to start is under Shake and Vibration While Driving.
^ The road test procedure will tell how to sort the conditions into categories and how to tell a vibration from a shake.
^ A series of Road Test Quick Checks is provided to make sure that a cause is either pinpointed or eliminated.
^ Name the condition, proceed to the appropriate component and locate the correct diagnosis. When the condition is identified, the job is partly done.
^ Follow the diagnostic procedure as outlined.
^ Quick Checks are described within the step, while more involved tests and adjustments are outlined in General Procedures.
^ Always follow each step exactly and make notes to recall important findings later.