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

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:

•
•

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)

Checklist:

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'

Affected
Vehicles:

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)

AfterSales

Feb 21, 2025
Page 1 of 8

9

Service
WSB0

ENU

Technical Information

2025

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

Re-program the central computer (PCM).
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.

Feb 21, 2025
Page 2 of 8

AfterSales

Service

Technical Information

2025

ENU

WSB0

9

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

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

AfterSales

Feb 21, 2025
Page 3 of 8

9

Service
WSB0

ENU

Technical Information

2025

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
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

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.

6

End the diagnostic application. Switch off ignition. Disconnect the Tester from the vehicle.

7

Switch off and disconnect the battery charger.

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.

Feb 21, 2025
Page 4 of 8

8

Attach the completed checklist to the PQIS quality line ⇒ Technical Information '9X00IN Checklist'

9

Enter the campaign in the Warranty and Maintenance Logbook.

AfterSales

Service

Technical Information

2025

ENU

WSB0

9

Warranty processing
Scope 1 and 2: Not relevant for this vehicle type

Scope 3:

Re-programming control unit for central computer (PCM)
Labor time:
Re-programming control unit for central computer (PCM)
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester

Labor time: 86 TU

Þ Damage Number WSB0 066 000 1