VAS 6350/7 - Locking Pins
VAS 6350/4 - Calibration unit for Lane Change Assist

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Compare noise complaint
3D Information: Additional information is stored under the following link, which is required for carrying out the action
described here:
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Sound file as an aid to identify the noise
Video as an aid to recreate the driving situation in which the noises occur
File required for this “PICO measurement”

Information
The updated 3D information for this action is currently not yet available. Please refer to the additional
information on PPN: https://ppn.porsche.com/portal/community/porsche_cars_north_america/after_
sales/support/blog/2023/11/17/sy-18321-additional-information
Work Procedure: 1

Recreate the noise complained about in a driving situation as described below and compare it with
the sound file from the 3D information:
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Light acceleration
Normal drive mode
Transmission in “D”
Light load at approx. 1500 rpm
Assessment

( )

This is the same noise.

Action
To confirm the noise, perform a targeted noise and
vibration analysis “PICO measurement”.
Continue with:  Technical Information '2X00IN
Check engine mounts'
The measurement can only be omitted if no PICO
analysis tool is available. In this case, based
on empirical values and a comparison vehicle
with dynamic engine mount, estimate whether

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a component replacement would lead to an
improvement.

(✗)

It is not the same noise.

Identify other cause of noise.
End of test.

Checking engine mounts using targeted noise and vibration analysis “PICO measurement”
CAUTION
Hot components
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Risk of burns



Let hot components cool down.

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Wear personal protective gear.

Information
In order to clearly determine that the engine mounts cause the noises complained about, a targeted noise
and vibration analysis “PICO measurement” must be performed.
If no targeted noise and vibration analysis “PICO measurement” is possible, based on empirical values
and, if necessary, a comparison vehicle with dynamic engine mounts whether these are unusually strong
noises, estimate whether a component replacement can make an improvement.

Information
Information and documents on the handling and use of the VAS 611 015A - vibration and noise
analysis system can be found in PALMS under “My learning area” with the keyword “Pico NVH
Diagnostics”
Overview › 01 Global › 01 Topics › 03 Technical Training › 01 Components & Repair Groups › 13 Others
Work Procedure: 1

Remove rear wheels.
 Workshop Manual '440519 Removing and fitting wheel'

2

Remove rear wheel housing liners (rear section).
 Workshop Manual '53691903 Removing and installing rear wheel housing liner (rear section)'

3

Install / route microphone and vibration and noise analysis system sensors as follows:
3.1

Microphone channel A rear-seat backrest
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Sensor type: Microphone
Item: Passenger compartment
Fastening on the vehicle: Rear-seat backrest area directed backwards  Item
microphone in channel A

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Item microphone in channel A
3.2

Sensor channel B seat rail for driver seat
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Sensor type: Acceleration sensor
Item: Passenger compartment
Fastening on the vehicle: Seat rail for driver seat at left Item sensor channel B

Item sensor channel B
3.3

Sensor channel C for left PADM bearing
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Sensor type: Acceleration sensor
Item: Engine compartment
Fastening on the vehicle: Screw on PADM bearing on the left on longitudinal member
 Item sensor channel C

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Item sensor channel C
3.4

Sensor channel D for right PADM bearing
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Sensor type: Acceleration sensor
Item: Engine compartment
Fastening on the vehicle: Screw on PADM bearing on the right on longitudinal member
 Item sensor channel D

Item sensor channel D
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Route the test leads  Example of routing / fastening underbody -1- in such a way that they are not
damaged during the analytical run.

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Example of routing / fastening underbody

Example of routing / fastening intake hose

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5

Install wheels at rear (wheel housing liners need not be installed for the analysis run).
 Workshop Manual '440519 Removing and fitting wheel'

6

For targeted noise and vibration analysis “PICO measurement”, proceed as follows:
6.1

Load the available comparison measurement file called “Vergleichsmessung.pddata” in 3D
information.

6.2

Start measurement based on Comparison measurement file “Vergleichsmessung.pddata”.
Required settings are pre-set.

6.3

Open the “Record and Analyse” tab.

6.4

Switch view from “Frequency” to “Time Domain”.

6.5

Set filter to 550 Hz–900 Hz if not already
done.  Frequency filter

6.6

Start recording and perform comparison run.
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Light acceleration
Normal drive mode
Transmission in “D”
Light load at approx. 1500 rpm

6.7

Set markers as soon as noise complaint is
noticeable.

6.8

Stop and save measurement if noise
complaint has been recorded.

6.9

Compare current measurement with sample measurement  Sample measurement with the
same scaling (400 mg and 2.5 seconds).

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Frequency filter

Service

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Sample measurement
Assessment
( )

Action

The noise can be attributed to the engine
mounts.

Using empirical values and, if necessary, a
comparison vehicle with dynamic engine mounts,
estimate whether these are unusually strong
noises.
If the noise is rated as “normal”, replacing the
engine mounts would not make any improvement.
If the noise is rated as “not normal”, replacing the
engine mounts can make an improvement.
If necessary, continue with:  Technical Information '440519 Replacing engine mounts'

(✗)

The noise cannot be attributed to the
engine mounts.

The engine mounts are not the cause of the noise.
If necessary, contact Technical Support in order to
agree on how to proceed.
End of test.
Continue with: Step  7.

7

Remove vibration and noise analysis system.

8

Install rear wheel housing liners (rear section).
 Workshop Manual '53691903 Removing and installing rear wheel housing liner (rear section)'

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Replacing engine mounts
Work Procedure: 1
2

Remove vibration and noise analysis system.
Replace engine mounts.

 Workshop Manual '103519 Removing and installing engine mount'

Working position and PCSS encryption
Labor position:
I No.

APOS

Labor operation

10350210

Check engine mounts

10352020

Removing and installing engine mount

10352010

Removing and installing engine mount
PCSS encryption:

Location (FES5)

10350

Engine mount

Damage type (SA4)

2013

rattles, knocks

Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a
discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed.

© 2024 Porsche Cars North America, Inc.

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