NHTSA ID Number: 11016728
Manufacturer Communication Number: No. 65-23
TSB/Document Date: 2025-04-07
Summary
Technical Information - Various Fault Patterns for Porsche Communication Management (PCM) with Software Version 36xx / 37xx/38xx: Performing Software Update(65/23)
Service
Technical Information
65/23
ENU
9152
9
Various Fault Patterns for Porsche
Communication Management (PCM) with Software Version 36xx /
37xx / 38xx: Performing Software Update (65/23)
Change
Overview:
Release
Date
Change
0
07/26/2023
•
First publication
1
09/03/2024
•
PIWIS Tester software
release adapted
PiUS part numbers changed
Target software version
adapted
•
•
2
03/12/2025
•
•
•
•
PIWIS Tester software
release adapted
PiUS part numbers changed
Target software version
adapted
Further complaint added
under “Cause”
Model Year:
As of 2022 up to 2024
Model Line:
911 (992)
Concerns:
Control unit for central computer (PCM)
Cause:
The PCM cannot be switched on, fails intermittently during vehicle operation or starts up again independently. Possible features:
•
•
•
•
PCM screen remains black
Navigation display on the instrument cluster fails
There is no sound output, and the hands-free device is faulty
The PCM can only be started again after some time or starts up again on its own
On vehicles with a BOSE® Surround Sound System (M-No. 9VL) or a Burmester® 3D High-End Surround
Sound System (M-No. 9VJ), the sound settings in the Main Menu >> Media >> Bose/Burmester may also
be lost after bus rest:
•
•
•
No longer ticked on the “Treble and Bass” settings
No longer ticked on the “Balance and Fader” settings
Setting bars to “0”
AfterSales
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Service
9152
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Technical Information
65/23
Real Time Traffic display does not show traffic jams in the text on the route monitor.
No access to the vehicle via the MyPorsche app with the message “Vehicle in private mode” although the
vehicle is not in private mode.
In the case of vehicles from model year 2024:
The map is not centered in the map view on the instrument cluster.
Action:
In the event of a complaint, re-program the central computer (PCM) with the latest PIWIS Tester software
release.
Information
The minimum programming requirement is the PIWIS Tester software release 43.200.020.
Required tools
Tools:
•
•
•
P90999 - P90999 - PIWIS Tester 4
Battery charger with a current rating of at least 90 A, e.g., VAS 5908 - battery charger 90 A
USB storage medium Type A+C 32 GB (for PCM update), Part-No. V04014999WW000, already
available at the Porsche Center
Overview of PCM update
Information
The central computer (PCM) software update is performed using a USB storage medium. The software
release that is specific to each region must be downloaded using the software tool PiUS (Porsche integrated
Update Service) and must be installed on a blank USB storage medium.
Pay particular attention to the following:
•
For this PCM software update, a USB storage medium must be used.
•
To use the software tool, one blank or re-writable USB storage medium is required for each individual
software.
•
The software available in PiUS must only be used in accordance with the instructions provided in a
Technical Information published for this purpose.
The software listed here may only be used for the action described here. Damage to the central computer
cannot be ruled out if the software is used on other vehicles.
You will find further information on installation and use for the PiUS software tool in the PPN portal under
*PiUS (Porsche integrated Update Service) goes live*.
Mar 12, 2025
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AfterSales
Service
Technical Information
Overview:
65/23
ENU
9152
Part No.
Designation
– Region
Vehicle allocation
9Y2909000AF
USB storage medium for PCM
update
– North America
– Mexico
I-No. ER3 / ER4
9
Re-programming control unit for central computer (PCM)
Information
Before starting programming, particular attention must be paid to the following:
•
Switch off the charger off and on once; the battery charger display must be off before starting it again,
because the battery charger automatically switches to trickle charge after 5 hours (default setting in
the charger).
•
The charger must be set to 14.6 V charging voltage and operated in charging mode.
•
Vehicles with a PVTS contract must be activated for Service mode.
•
The PIWIS Tester must not be charged using the cigarette lighter!
Information
If Privacy mode is not active, programming may be aborted, resulting in a defect in the central computer
(PCM).
Information
If control units are found to have faults that are not caused by control unit programming, these must first be
found and corrected.
Work Procedure: 1
Unless otherwise already done, prepare a USB storage medium with the software required for the PCM
central computer depending on the country variant in accordance with the above overview.
⇒ Technical Information 'Overview of PCM update'
2
The basic procedure for control unit programming is described in the Workshop Manual ⇒ Workshop
Manual 'Basic Instructions and Procedure for Control Unit Programming Using the PIWIS Tester'.
3
Select the Guest account from the central display (PCM) and activate Privacy mode (available in some
countries).
4
Re-program the central computer (PCM).
For specific information on control unit programming during this campaign, see the table below.
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Technical Information
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Required PIWIS Tester software release:
43.200.020 (or higher)
Type of control unit programming:
PCM central computer update using PIWIS Tester
start code to start the guided programming
sequence. The PCM application software is loaded
via the USB storage medium.
In the control unit selection (‘Overview’ menu)
select the PCM central computer control unit and
select the ‘Service / repairs’ menu.
Select the ‘Install software update’ function and
press •F12“ (‘Next’) to perform the software
update.
Programming code:
X3G5A
Programming sequence:
Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
Do not interrupt the programming and coding
process.
A backup documentation process for the
re-programmed software releases starts as soon
as programming and coding is complete.
Required software (part number and software
version):
•
North America/Mexico (M-No. ER3/ER4):
9Y2909000AF / 3885
Programming time (up to):
25 minutes
Procedure in the event of error messages
appearing during the programming sequence:
⇒ Workshop Manual '9X00IN Basic instructions
and procedure for control unit programming using
the PIWIS Tester – Section on “Troubleshooting”'
Procedure in the event of a termination in the
control unit programming:
Repeat control unit programming by restarting
programming.
Additional instructions for aborted programming
⇒ Technical Information '9X00IN Additional
information if programming is aborted'
Integration test procedure:
Mar 12, 2025
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•
The integration test shows a green result
regardless of this update
5
Read out all fault memories and process and delete existing faults if necessary.
6
Press •F3“ to start the integration test in the control unit selection.
All affected control units should now be successfully re-programmed or checked in the control unit
overview and their status.
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Information
If a deviation in the integration test is still indicated despite programming being carried out, this must be
repeated. If the deviation persists, contact Technical Support.
7
End the diagnostic application. Switch off the ignition. Disconnect the Tester from the vehicle.
8
Set the battery charger back to a charge voltage of 14.4 volts.
Additional instructions if programming is aborted
Information
If individual programming steps or rework could not be carried out correctly, see Workshop Manual for
the basic procedure for control unit programming using the PIWIS Tester. ⇒ Workshop Manual '9X00IN
Basic instructions and procedure for control unit programming using the PIWIS Tester - Section on
“Troubleshooting”'
In the event of a fault, logging must always be created during programming using •Ctrl“and •L“using the
PIWIS Tester.
Notes:
Control unit:
Situation:
Action:
Cancelling individual control
units:
One or more control units cannot
be programmed or can no longer
be accessed
•
•
•
•
Central computer (PCM)
The central computer freezes
while loading
AfterSales
•
•
Check whether the control
unit can be accessed using
the PIWIS Tester or if bus idle
does not have to be carried
out
Control unit still not
accessible –> Remove fuse
for control unit –> Ignition on
–> Ignition off –> Re-insert
fuse
Control unit still not
accessible –> Disconnect
battery overnight
Check whether the control
unit is accessible
Starting programming again
Performing PCM factory
reset using guided PIWIS
Tester procedure
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Central computer (PCM)
The central computer control
unit cannot be accessed
•
Pulling out fuse for central
computer control unit –>
Ignition on –> Ignition off –>
Re-insert fuse
Central computer (PCM)
Programming of the central
computer (PCM) aborts when
Fault 33 is detected
•
Fault 33 is displayed on the
central computer display
during programming
Start the update in the
Developer menu on the
central computer (PCM). The
update may only be started
from the Developer menu in
this case because the PCM
is already in the Developer
menu
If the update still cannot be
performed –> replace central
computer (PCM)
•
•
Central computer (PCM)
No start of programming
•
Programming is started
via the additional menu
and not in the central
computer (PCM) control
unit under Service / repairs
as described in the TI
Central computer (PCM)
Programming is not started or
programming is interrupted
•
For other topics that are not
listed in the TI, a PRMS ticket
must be created before
replacing the PCM system
Labor position and PCSS encryption
Labor position:
APOS
Labor operation
91522520
Programming central computer
I No.
PCSS encryption:
Location (FES5)
91520
Central computer
Damage type (SA4)
1614
Function not as per specification
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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.
© 2025 Porsche Cars North America, Inc.
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TSB/Document ID: No. 65-23
Replacement Service Bulletin Number:
MFR Communication Date: 2025-03-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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