Operation CHARM: Car repair manuals for everyone.

Engine: Testing and Inspection


Noise, Vibration And Harshness (NVH) Troubleshooting:




NVH Troubleshooting Chart:





Use the chart to help you find the cause of the symptom.
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of engine.
4. Check specified noise source.
If necessary, repair or replace these parts.