No. 155-21

Service
Technical Information
155/21 ENU WML0
9
WML0 – Retrofitting Loudspeaker Booster (Delivery Stop)
Revision:
This bulletin replaces bulletin Group 9 155/21 WML0, dated November 28, 2022.
Model Year:
As of 2021 up to 2023
Model Line:
Cayenne (9YA/9YB)
Equipment:
BOSE Surround Sound System (M-no. 9VL)
Concerns:
Loudspeaker booster
Information:
Due to worldwide semiconductor shortages experienced by some suppliers, the affected
vehicles were built without a loudspeaker booster.
Action required: Retrofit loudspeaker booster.
Information
Please also note that the new loudspeaker boosters must be re-coded using the latest PIWIS Tester
software version during the teaching process. The minimum requirement is version 41.550.013.
Information
Each vehicle will now be assigned 2 Repair Scopes from CW45 onward. Scope 2 applies to
vehicles where the original Campaign Part V04015001FE is used. Scope 8 is to be claimed
if the new Campaign Part V04015009A is used. Your dealer will need to choose the correct
scope when submitting the warranty claim based off the part used for each vehicle. The new
part V04015009A will begin to arrive at dealers starting CW46 as well as continued allocations
of the original part V04015001FE..
The two parts are identical and can be used on any Cayenne with WML0 but must be recorded
properly in the Warranty system for proper billing of your dealer.
Scope 2, 8: Installing and teaching loudspeaker booster
Affected
Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information).
AfterSales
Dec 30, 2022
Page 1 of 8
9
Service
WML0
Technical Information
ENU 155/21
Installation
Position:
Installation position
– Loudspeaker booster (retrofit)
Parts required
Parts Info:
Part No.
Designation
Qty.
V04015001FE
 Booster
1 ea.
As of CW 46/2022:
 Booster
1 ea.
 Self-tapping screw
4 ea.
V04015009A
N 10442003
Required tools
NOTICE
Use of a PIWIS Tester test software version that is older than the prescribed version
•
Measure is ineffective
Dec 30, 2022
Page 2 of 8
AfterSales
Service
Technical Information

155/21 ENU WML0
9
Always use the specified version or a higher version of the PIWIS Tester test software for control unit
programming or coding.
Tools:
•
•
•
Torque wrench, 2-10 Nm (1.5-7.5 ftlb.), e.g. V.A.G 1783 - Torque wrench, 2-10 Nm (1.5-7.5
ftlb.)
Battery charger with a current rating of at least 90 A and - if required - also with a current and
voltage-controlled charge map for lithium starter batteries, e.g. VAS 5908 Battery charger,
90 A
9900 - PIWIS Tester 3 with installed PIWIS Tester test software version 41.550.013 (or higher)
installed
Installing loudspeaker booster
NOTICE
Incorrect handling of optical waveguides
•
Risk of damage to optical waveguide

Observe the requirements for working with and installing optical waveguides.
NOTICE
Voltage peaks
•
Risk of damage to electrical load or to the control unit

Switch off ignition and keep transmitter key outside of the transmission range (at least 5 m).

Switch off electrical loads before disconnecting or removing them.
Work
Procedure:
Information
Always comply with the regulations for handling ESD-sensitive components!
•
Always wear approved work clothes and shoes when carrying out assembly work.
•
Do not remove new parts from ESD (electrostatic discharge) protective packaging until shortly
before installation.
•
Do not touch electric pins and plug contacts.
1
Remove side trim panel for rear luggage compartment at the right.  Workshop Manual '700319
Removing and installing side trim panel for rear luggage compartment'
AfterSales
Dec 30, 2022
Page 3 of 8
9
Service
Technical Information
ENU 155/21
WML0
2
Position loudspeaker booster  Loudspeaker
booster -1-, screw in fastening screws  Loudspeaker booster -3- and tighten to Tightening
torque 6 Nm (4.5 ftlb.) .
Information
The number of connecting lines for the loudspeaker
booster will vary depending on equipment and the
connecting lines are located close to the installation
position. These may be fastened in place and may have to
be exposed beforehand.
Loudspeaker booster
3
Plug in and lock electric plug connections  Loudspeaker booster -2-.
4
Install side trim panel for rear luggage compartment at the right.  Workshop Manual '700319
Removing and installing side trim panel for rear luggage compartment'
5
After installing the loudspeaker booster, continue as follows:
Continue with  Technical Information '700319 Warranty processing'
End of action required -
Teaching loudspeaker booster
NOTICE
Voltage drop
•
Destruction of control unit
•
Damage to control unit
•
Fault entries in the control unit
•
Coding in the control unit is aborted
•
Malfunctions in control unit, even during programming

Switch off ignition before connecting the control unit.

Ensure that the power supply is not interrupted during programming.

Connect a battery charger with a current rating of at least Current 90 A to the vehicle battery.
Information
Because no interference-free audio quality can be guaranteed in the radio, there must be no audio output
via radio for the test, rather it must be played via another audio source, e.g. via a USB stick.
Dec 30, 2022
Page 4 of 8
AfterSales
Service
Technical Information
155/21 ENU WML0
9
Information
The loudspeaker booster must be replaced if dropouts and/or disturbing noises are detected. Only
use the amplifiers with campaign part numbers when replacing. The incurred labor costs and the
additional cost of parts required over and above this scope must be invoiced using a reimbursement
claim for the original campaign claim for this campaign. In this case, the removed and faulty loudspeaker
booster will be requested and must be returned for further analysis.
Work
Procedure:
Information
To carry out the campaign, the PIWIS Tester must be online and logged into the Porsche Partner Network
(PPN).
1
Connect the PIWIS Tester to the vehicle communication module (VCI) via the USB cable. Then
connect the communication module to the vehicle and switch on the PIWIS Tester.
2
Place original remote control (hand-held transmitter)
in emergency start tray.  Emergency start tray
3
Switch on the ignition.
4
Select the 'Booster' control unit in the overview.
Press •F12“ ('Next') to continue.
5
When the question “Create Vehicle Analysis Log
(VAL)?” appears, either press •F12“ ('Yes') to create
a VAL or press •F11“ ('No') if you do not want to
create a VAL.
Emergency start tray
6
Select 'Coding/programming'.
7
Select 'Automatic coding'. Press •F12“ ('Next') to continue.
8
The message "Coding was completed successfully" appears. Press •F12“ ('Next') to continue.
9
In the overview, press •F7“ to switch to the Additional menu.
10 Select 'Commission component protection'. Follow instructions and procedure. Press •F12“
('Next') to continue.
11 Enter the PPN user name and password. Press •F12“ ('Next') to continue.
12 Follow the instructions on the PIWIS Tester.
13 Check the chassis number and enter the order number. Press •F12“ ('Next') to continue.
AfterSales
Dec 30, 2022
Page 5 of 8
9
Service
WML0
Technical Information
ENU 155/21
14 Select 'Gateway' (master) component protection in order to teach it. Press •F12“ ('Next') to
continue.
15 Allow the Tester to run the procedure.
16 The Tester displays the message: 'Component protection taught'. Press •F12“ ('Next') to
continue.
17 Go back to the overview. Press •F12“ ('Next') to continue.
18 Read out and erase the fault memories of all control units.
18.1
Press •F7“ in the control unit selection screen ('Overview' menu) to call up the Additional
menu.
18.2
Select the function 'Read all fault
memories and erase if required'. Press
•F12“ ('Next') to continue.  Erasing fault
memories
The fault memories of the control units are
read out.
18.3
Once you have read out the fault memories,
check the fault memory entries.
Erasing fault memories
Information
If control units are found to have faults that
are not caused by control unit programming, these must first be found and corrected. This
work cannot be invoiced under the workshop campaign number.
18.4
Press •F8“ to delete fault memory entries.
18.5
Press •F12“ ('Yes') in response to the question asking whether you really want to delete all
fault memory entries.
The faults stored in the fault memories of the various control units are deleted.
Information
If fault memory entries for individual control units cannot be deleted, proceed as follows:
Dec 30, 2022
Page 6 of 8
•
Switch off ignition.
•
Disconnect the PIWIS Tester diagnostic connector from the diagnostic socket.
•
Lock the vehicle using the driver's key.
•
Wait approx. 1 minute before unlocking the vehicle again.
•
Start the engine, leave it running for a short time and then stop it again.
AfterSales
Service
Technical Information
18.6
155/21 ENU WML0
9
•
Switch off the ignition and wait approx. 10 seconds before switching it back on again.
•
Plug the PIWIS Tester diagnostic connector into the diagnostic socket again and restore
communication with the vehicle.
•
Read out the fault memory again and delete any fault memory entries that are stored.
Once you have erased the fault memories,
select the 'Overview' menu to return to the
control unit selection screen  Control unit
selection.
19 Exit the diagnostic application. Switch off ignition.
Disconnect the Tester from the vehicle.
20 Carry out a function test on the loudspeaker booster
and check for audio output.
21 Enter the campaign in the Warranty and Maintenance
booklet.
Control unit selection
Warranty processing
Information
The working times specified below were determined specifically for carrying out this campaign and may
differ from the working times published in the PCSS Labor Operation List.
Scope 1:
Dummy scope – billing not possible
Information
Scopes 1 –8, 10 are not applicable for this vehicle type.
Scope 2:
Installing loudspeaker booster and teaching loudspeaker booster
Valid for
•
Cayenne (9YA/9YB)
AfterSales
Dec 30, 2022
Page 7 of 8
9
Service
Technical Information
ENU 155/21
WML0
Working time:
Labor time: 68 TU
Installing loudspeaker booster
Includes:
Removing and installing cover for (rear) lock carrier
Removing and installing side trim panel for rear luggage
compartment at the right
Teaching loudspeaker booster
Reading out and erasing fault memories
Function test
Parts required:
V04015001FE
Booster
1 ea.
N 10442003
Self-tapping screw
4 ea.
 Damage Code WML0 066 000 1
Scope 8:
Installing loudspeaker booster and teaching loudspeaker booster
Valid for
•
•
Cayenne (9YA/9YB)
As of CW 46/2022
Working time:
Installing loudspeaker booster
Includes:
Removing and installing cover for (rear) lock carrier
Removing and installing side trim panel for rear luggage
compartment at the right
Teaching loudspeaker booster
Reading out and erasing fault memories
Function test
Labor time: 68 TU
Parts required:
V04015009A
Booster
1 ea.
N 10442003
Self-tapping screw
4 ea.
 Damage Code WML0 066 000 1
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.
© 2023 Porsche Cars North America, Inc.
Dec 30, 2022
Page 8 of 8
AfterSales