NHTSA ID Number: 11032437
Manufacturer Communication Number: No. WSJ0
TSB/Document Date: 2026-05-07
Summary
Technical information for WSJ0 – Update to Software Network VR28.13
Service
Technical Information
2025
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WSJ0
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WSJ0 – Update to Software Network VR28.13 (Workshop Campaign)
Important:
CRITICAL WARNING - This campaign includes steps where control unit(s) in the vehicle will be programmed
with the PIWIS Tester. The vehicle voltage must be maintained between 13.5 volts and 14.5 volts during this
programming. Failure to maintain this voltage could result in damaged control unit(s). Damage caused by
inadequate voltage during programming is not a warrantable defect. The technician must verify the actual
vehicle voltage in the PIWIS Tester before starting the campaign and also document the actual voltage on the
repair order.
Model Year:
As of 2024 up to 2025
Change
Overview:
Revision
Date
Change
0
11/04/2025
•
First publication
1
11/05/2025
•
•
•
Addition of reference to Note attached on PPN page for this
Campaign
Update to Note attached on PPN page for this Campaign
Update to ‘Notice’ under Work Procedure Step 3
2
11/06/2025
•
Addition of ‘Checklist’ section as a separate attachment on PPN
3
11/12/2025
•
Update to Checklist: Addition of step 17 & modification of step
19
4
12/19/2025
•
•
•
Update to minimum required Porsche Tester software release
Addition of step 17 within Work Procedure section
Addition of step 23 in Checklist
5
02/09/2026
•
•
Update to minimum required Porsche Tester software release
Update to “Update to software network VR28.13”, work
procedure step 2, and step 3
Update to “Additional information on control unit programming
and coding”, work procedure
Update to “Checklist”, step 10
•
•
6
03/02/2026
•
7
04/30/2026
“Update to software package VR28.03 SQ4” implemented
•
•
•
Update to work procedure “During the update”, “HCP2 driver
assistance main control unit (J1274)”, and “Main control unit
for gateway HCP5 (J1273)”
Minimum requirement for Porsche Tester software release
changed
Action revised (updating Owner's Manual in the PCM for scope
3 and 4 added, teaching rear lid (work step 8) added, adding
service intervals (work step 9) added)
Required tools added
AfterSales
Apr 30, 2026
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Technical Information
2025
•
•
Overview of the new features of the software update added
Checklist revised
Model Line:
Macan Electric (XAB)
Concerns:
Software update (software network VR28.13 SQ4)
Information:
Software optimizations are available for various control units for the Macan Electric.
An overview of the improvements that will be integrated with this software update can be found in the
appendix under ⇒ Technical Information 'Overview of new features of the software update'
Action:
•
•
•
Perform reprogramming of the affected vehicle using the Porsche
Tester on software network VR28.13
SQ4
Update Owner's Manual in the PCM – only valid for vehicles with the allocated scope 3 and scope 4
Minimum requirement: Release 44.100.010 (or higher)
Checklist:
Due to the high number of programming steps incorrectly carried out as part of the last software update, a
checklist was created to improve the overview of the work to be carried out. This can be used as a tool at the
start and for support during the update.
The checklist must be completed, signed and attached to the PQIS quality line in the PCSS.
For the checklist, see ⇒ Technical Information 'Checklist'
Supporting
Videos:
For a better overview of the work to be carried out, several supporting videos have been created for individual
work steps.
NOTE: Some videos have German language voiceover.
The supporting videos are available in PCSS: ⇒ Workshop Manual '9X00IN10 Electrical system – general
information (implementation of a software network update)'
Affected
Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information).
Required tools
Tools:
•
•
•
Apr 30, 2026
Page 2 of 23
Porsche Tester P90999 - Porsche Tester 4
Battery charger with a current rating of at least 90 A, e.g., VAS 5908 - 90-A battery charger. For
further information about the battery chargers to be used, see the corresponding Workshop Manual. ⇒
Workshop Manual '270689 Charge battery and vehicle electrical system'
Only valid for vehicles with assigned scope 3 and scope 4 – USB storage medium Type-C (for updating
onboard Owner's Manual)
AfterSales
Service
Technical Information
2025
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WSJ0
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Update to software network VR28.13 SQ4
NOTICE
Sitting inside the vehicle during the update
•
Update cancelled by automatic ignition activation
Þ
⇒
Avoid sitting inside the vehicle during the update.
NOTICE
The specified update process was not followed
•
Update cancellation
•
Destruction of control units
Þ
⇒
Observe and follow the procedures displayed for the update and instructions for the Porsche Tester
Þ
⇒
Do not switch the ignition on/off without instruction from Porsche Tester
Þ
⇒
Repeat the programming only if a failed update is displayed on the Porsche Tester
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Technical Information
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Information
Vehicle update – general information
The entire vehicle network will be checked for a necessary update or computed to ensure fault-free functioning of the vehicle. For this purpose, the following preparations are to be made:
•
Latest release on available on Porsche Tester 4 and PiUS
•
Vehicle is fully built up
•
To prevent potential faults due to insufficient data transfer, carry out the software update using
a cable (between VCI and Porsche Tester). Only if sufficient WLAN availability is ensured in the
workshop can a wireless update be performed
•
The user must be logged into the Porsche Tester 4 in the PPN
•
The vehicle must be supported with an external charger
•
Seat heating and seat ventilation are not active
•
Place the original hand-held transmitter in the emergency start tray (see Workshop Manual)
For this update procedure, the respective vehicle no longer needs to be in transport mode
Procedure for new vehicles with active transport protection:
Perform “Vehicle handover” routine according to the Porsche Tester instructions, to deactivate transport
protection.
Always make sure: to answer the question of “Is this a new vehicle?” asked by the Tester with No!
As a result, no complete vehicle commissioning is carried out and only transport protection can be deactivated.
A NOTE ON CAMPAIGN PROGRAMMING FOR MULTIPLE VEHICLES AT THE SAME TIME: PCNA will make an
exception to warranty policy regarding the necessary time keeping procedures when performing campaigns
with an Integration test. Though warranty policy guidelines state that no technician may be punched on
more than one R.O. at the same time, an exception will be made for these campaigns. Due to the extensive
programming time necessary, a technician may perform multiple integration test campaigns at one time, as
long as there is a separate identifiable punch for each on the respective repair order and the total number of
campaigns being performed at one time does not exceed 3 vehicles. The exception will be made so that full
"active participation time" does not need to be documented for these 3 campaigns only. Please refer to the
Campaign FAQ document on PPN for more information.
Work Procedure: 1
Observe preconditions for control unit programming.
⇒ Technical Information '9X10IN Basic instructions and procedure for control unit programming using
the PIWIS Tester Information'
Information
An active internet connection with the Porsche Tester must be ensured.
The technician must log in to PPN with the Porsche Tester.
The Porsche Tester must not be charged using the cigarette lighter.
Apr 30, 2026
Page 4 of 23
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Technical Information
2025
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Information
Before starting the diagnosis, it is essential for an ignition change to be performed on the vehicle.
Subsequently, after starting the diagnosis, the VCI will be automatically initialized and the control unit
data is loaded.
For additional information on the programming procedure and when the process is aborted, see ⇒
Technical Information '9X10IN Additional information on control unit programming and coding'.
2
Prepare an update of the various control units on software network VR28.13 SQ4.
2.1
Start new logging via •P2“.
2.2
Press •F3“ to start the integration test in the control unit overview.
Create a Vehicle Analysis Log (VAL). Mark the created VAL with the attribute “Pre-VAL” and, after
carrying out the campaign, return it using the Porsche Tester.
The required updates are then automatically displayed for the respective vehicle in accordance
with the integration test.
Information
Due to overload of the onboard tester, an interruption may occur intermittently in the step “Onboard tester
downloads update”.
In this case, the Porsche Tester will automatically restart the entire update process.
No intervention by the user is required!
3
Update the software of various control units on software network VR28.13 SQ4.
Start the software update with ‘Campaign’ •F5“ (if not available, start the ‘Repair’ function with
•F8“) and program it according to the menu guidance.
After the update has been completed, a corresponding confirmation is displayed on the Porsche Tester.
All affected control units should now be successfully programmed or checked in the results view
showing the control units and their status.
Information
If a deviation in the integration test is still indicated despite the programming carried out, this must be
repeated. If the deviation persists, contact Technical Support.
Information
The entire update process for this action takes approx. 120 minutes depending on the equipment.
However, the download speed of the update package depends on the performance of the local network
and can vary accordingly.
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Information
During the update process, all displays in the vehicle (instrument cluster, central display and passenger
display) are occasionally switched off. Nevertheless, the programming is ongoing, the ignition must not
be switched on/off, as this can result in the destruction of the control units.
During the update, a buzzing of the acoustic simulator will sound several times. This noise is normal
and indicates an ongoing update of the HCP1 drive and chassis main control unit (J1312).
If Wi-Fi coverage is insufficient, the connection
between the Porsche Tester and VCI can be interrupted
(battery charge indicator at the top right inactive on the
Tester display). The vehicle will, nevertheless, continue
programming independently. In the meantime, no
entry may be made on the Porsche Tester, and the
programming must not be restarted. In this case, the
update progress can still be checked in the vehicle in
the front display and control panel (R238) by going to
the “Messages” (RPC+) tile.
Update progress on central display
NOTICE
Switch ignition on/off in the event of faults in the HCP4 body electronics main control unit (J519)
•
Destruction of control units
Þ
⇒
Do not switch the ignition on/off after completing the update if faulty HCP4 (J519) programming and coding is
displayed.
If the main HCP4 body electronics control unit (J519) has a programming and coding error in the results
view after programming is completed, follow the corresponding procedure in the section ⇒ Technical Information '9X10IN Additional information on control unit programming and coding'.
For specific information on control unit programming during this campaign, see the table below.
Required Porsche Tester software release:
44.100.010 (or higher)
Type of control unit programming:
Start control unit programming in the integration test
using the ‘Campaign’ function •F5“ on the Porsche
Tester (if not available, start the ‘Repair’ function with
•F8“)
Campaign to be carried out: WSJ0
Apr 30, 2026
Page 6 of 23
AfterSales
Service
Technical Information
2025
Programming sequence:
ENU
WSJ0
9
Read and follow the information and instructions on
the Porsche 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 after
programming and coding.
Programming time (up to):
120 minutes
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TSB/Document ID: No. WSJ0
Replacement Service Bulletin Number:
MFR Communication Date: 2026-04-30
MFR Internal Campaign ID/Software Version: WSJ0
Communication Type: Service Campaign
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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