WSB0 Service Campaign

Service
Technical Information
2025
ENU
WSB0
9
WSB0 – Re-Programming Central Computer (PCM) and Connect Control Unit (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:
2025
Change

Overview:
Release
Date
Change
1
02/21/2025
•
First publication
2
03/12/2025
•
Removal of request to

attach the completed

checklist to the PQIS quality

line
Model Line:
Cayenne (9YA/9YB)
Concerns:
Control unit for central computer (PCM)

Application extension control unit
Cause:
Optimized software is available for the central computer (PCM) control unit and the application extension

control unit.

An overview of optimizations that will be implemented with the software update can be found in the

attachment under ⇒ Technical Information 'Overview of optimisations of the software update'
Actions:
•

•
Checklist:
Re-programming the control unit of the central computer (PCM) using the latest PIWIS Tester software

release in each case.

Minimum requirement: Release 43.200.010 (or higher)
For better clarity, a checklist was created as an aid for carrying out the campaign.

This does not replace the TI.

The checklist does not have to be attached to the job line in PCSS.

For checklist, see ⇒ Technical Information 'Checklist'
AfterSales
Mar 12, 2025

Page 1 of 8
9
Service

WSB0
Affected

Vehicles:
ENU
Technical Information
2025
Only vehicles assigned to the campaign (see also PCSS Vehicle Information).
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)
Re-programming control unit for central computer (PCM)

Work

Procedure:
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).
•
Set charge voltage to 14.8 volts.
•
Operate 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!
1
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'.
2
Select the Guest account from the central display (PCM) and activate Privacy mode (available in some

countries).

Information

If Privacy mode is not active, programming may be aborted, resulting in a defect in the central computer

(PCM). Central computers that are replaced as part of the workshop campaign are checked by

Porsche AG. If private mode was not set in the central computer before starting programming, the costs

will be re-debited.
3
Mar 12, 2025

Page 2 of 8
Re-program the central computer (PCM).
AfterSales
Service
Technical Information
2025
ENU
WSB0
9
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, the USB storage medium USB Type A+C 32 GB 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 mentioned here must only be used on the vehicles assigned to the campaign. 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*.

Prepare the USB stick with the required PIUS software.

Part No.
Designation

– Region
Vehicle allocation
976909000C
USB storage medium for PCM

update

– North America

– Mexico
I-No. ER3 / ER4
For specific information on control unit programming during this campaign, see the table below.

Required PIWIS Tester software release:
43.200.010 (or higher)
Type of control unit programming:
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:
E3M1B
AfterSales
Mar 12, 2025

Page 3 of 8
9
Service

WSB0
ENU
Technical Information
2025
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 after

programming and coding.
Programming time (up to):
30 minutes
Software release to be programmed during this

campaign:
•
Control unit for central computer (PCM)

4360
Following control unit programming, the software

release can be read out from the relevant control

unit using the PIWIS Tester in the menu ⇒ ‘Incremented identifications’.

Procedure if error messages appear during

programming sequence:
⇒ Workshop Manual '9X00IN Basic instructions
Procedure in the event of a termination in the

control unit programming:
Repeat control unit programming by restarting

programming.
and procedure for control unit programming using

the PIWIS Tester - section on "Troubleshooting"'
Additional instructions for aborted programming

⇒ Technical Information '9X00IN Additional

instructions if programming is aborted'

4
Read out all fault memories process and delete existing faults if necessary.

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.
5
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 and

their status overview.

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.
Mar 12, 2025

Page 4 of 8
AfterSales
Service
Technical Information
2025
ENU
WSB0
6
End the diagnostic application. Switch off ignition. Disconnect the Tester from the vehicle.
7
Switch off and disconnect the battery charger.
9
Information

The wheel electronics must be taught again during the test drive, while ensuring that the wheel / tire combination is correct.

The activities must be carried out during the test drive and do not need to be carried out by the technician.

8
Enter the campaign in the Warranty and Maintenance Logbook.
Warranty processing

Scope 1 and 2: Not relevant for this vehicle type

Scope 3:

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Last update on 2026-05-12 / Affiliate links / Images from Amazon Product Advertising API

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