Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

NVH Troubleshooting Chart




NVH Troubleshooting

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.







A: Closely related B: Related C: Sometimes related -: Not related