Wind noises often have similar causes as the general NVH noises. For instance, a windshield which is incorrectly bonded in position can cause normal driving noises to become more noticeable.
Asking the customer detailed questions and a road test together with the customer are the requirements for a targeted diagnosis.
NOTE: Take the customer concern seriously. But do not confirm that a noise is a problem until you are sure that it is something which is not normal for the vehicle series.
Possible questions:
Remember that a noise is often more or less noticeable depending on where you are sitting in the vehicle.
Stage | to test | Result | Reference or Action |
1st | Road test the
vehicle with the
customer. First
let the customer
drive to demonstrate
the noise,
before you drive
the vehicle yourself.
Check that the concern is justified. Is this a noise which gives cause for concern? |
Yes | Step 2. |
No | Explain the noise
and tell the
customer what is
causing it.
Possibly offer a comparable vehicle for a road test. |
||
2nd | Visually inspect
the vehicle. Look
for loose,
damaged or
missing components.
Check that the vehicle is to standard production series specification. In particular, check for any aftermarket components which may have been installed. Depending on the type of noise, check the suspected area. Could a cause of the noise be found? |
Yes | Eliminate the
noise or carry
out a repair as
the case may be.
Check whether the measures have been successful. |
No | Step 3. | ||
3rd | Before starting
any further work,
use the VIN to
look for modelspecific
information
in eTIS.
Perform Oasis query and check TSBs. Can a cause for the noise be determined based on the information available? |
Yes | Take the action
specified in the
Oasis or TSB
information.
Check whether the measures have been successful. |
No | Step 4. | ||
4th | Localize the noise. In doing so, check whether it is an unusual noise or if it is a usual driving noise that is more noticeable because of inadequate sealing. Is it an unusual noise? | Yes | Step 5. |
No | Step 7. | ||
5th | Determine the source of the noise. Can the cause be determined? | Yes | Eliminate the
noise or carry
out a repair as
the case may be.
Check whether the measures have been successful. |
No | Step 6. | ||
6th | Determine the
path of the noise
using the stethoscope.
By way of a trial, mask the suspected area or components or remove them. Can the cause be determined? |
Yes | Eliminate the
noise or carry
out a repair as
the case may be.
Check whether the measures have been successful. |
No | Step 7. | ||
7th | Check the
vehicle for inadequate
or
damaged seals.
The sealing of a vehicle can be checked using the stethoscope, the powder test, the smoke test and the ultrasonic detector. (See under test method.) Could a leak be detected? |
Yes | Renew the seal
or perform the
appropriate
repair as necessary.
Check whether the measures have been successful. |
No | Step 8. | ||
8th | Under certain circumstances there may be a constructional problem which is not yet known about. Record the problem in an Express Service Report and send it on by the usual method. |