No. WSC3 Service Campaign

Service
Technical Information
2025
ENU
WSC3
9
WSC3 – Re-Program DME 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:
As of 2021 up to 2023
Vehicle Type:
Panamera 4 E-Hybrid (971) / Panamera 4S E-Hybrid (971)
Concerns:
DME control unit
Cause:
Optimized software for the DME control unit is available for the affected vehicles.

The software update improves the robustness of the engine control during the heating phase of the catalytic

converter.
Action:
Re-program the DME control unit using the PIWIS Tester.

Information

The minimum programming / coding requirement is the PIWIS Tester software release 43.300.020 (or

higher).
Affected

Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information).
Required tools

Tool:
•

•
P90999 - PIWIS Tester 4

Battery charger with a current rating of at least 90 A and a current- and voltage-controlled charge

map for lithium starter batteries, e.g. battery charger 90 A. For further information about the battery

chargers to be used, see the corresponding Workshop Manual. ⇒ Workshop Manual '270689 Charging

vehicle electrical system battery'
Re-program DME control unit

Work Procedure: 1
Re-program DME control unit.

The basic procedure for control unit programming is described in the Workshop Manual ⇒ Workshop

Manual '9X00IN Basic instructions and procedure for control unit programming using the PIWIS Tester'.
AfterSales
Jun 9, 2025

Page 1 of 4
9
Service

WSC3
ENU
Technical Information
2025
For specific information on control unit programming during this campaign, see the table below.

Required PIWIS Tester software release:
43.300.020 (or higher)
Type of control unit programming:
Control unit programming using the "Automatic

programming" function of the DME control unit:

"DME" control unit – "Coding/programming" menu –

"Automatic programming" function.
Programming sequence:
Read and follow the information and instructions on

the PIWIS Tester during the guided programming

sequence.

During the programming sequence, the DME control

unit is re-programmed first, then the PDK control unit

is re-programmed.

Both control units are then automatically re-coded.

Do not interrupt the programming and coding

process.

Once the control units have been programmed and

coded, you will be prompted to switch the ignition off

and then back on again after a certain waiting period.

Backup documentation of the new software versions

is then performed.
Jun 9, 2025

Page 2 of 4
The programming sequence takes (approx.):
12 minutes
Software release programmed during this

action:
See section. ⇒ Technical Information '9X00IN

Overview of programmed DME data records'
Procedure in the event of a termination in

the control unit programming:
• Switch the ignition off and switch on again.

• Read out and erase the fault memory ⇒ Workshop

Manual '9X00IN Basic instructions and procedure for

control unit programming using the PIWIS Tester "Rework" section'.

• Repeat control unit programming by restarting

programming.
Procedure if other error messages appear

during the programming sequence:
⇒ Workshop Manual '9X00IN Basic instructions and

procedure for control unit programming using the

PIWIS Tester - chapter on "FSL troubleshooting"'.
2
Read out all fault memories, process and delete existing faults if necessary.
3
End the diagnostic application. Switch off the ignition. Disconnect P90999 - PIWIS Tester 4 from the

vehicle.
AfterSales
Service
Technical Information

4

5
2025
ENU
WSC3
9
Switch off and disconnect the battery charger.
⇒ Workshop Manual '270689 Charge vehicle electrical system battery'

Enter the campaign in the Warranty and Maintenance Logbook.
Overview of programmed DME data records

Information

The data for software part number and software version of the programmed data record are based on the

specified PIWIS Tester test software release. Please note that this can be different in a later release.

Panamera 4 E-Hybrid (971):

Exhaust emission

standard

ULEV70
Porsche part number (software)

972907551AS
Software release

0005 (or higher)
Panamera 4S E-Hybrid (971):

Exhaust emission

standard

ULEV70
Porsche part number (software)

972907551AN
Software release

0005 (or higher)
Warranty processing

Information

The stated labor time was determined specifically for carrying out this campaign and includes all necessary

preliminary and subsequent rework. The labor time may differ from the labor times published in the Labor

Operation List in PCSS.

Scope 1:
Re-program DME control unit

Labor time:

Re-program DME control unit

Includes:

Connect and disconnect battery charger

Connect and disconnect PIWIS Tester

Read out and delete fault memory
Labor time: 49 TU
⇒ Damage number WSC3 066 000 1
AfterSales
Jun 9, 2025

Page 3 of 4
9
Service

WSC3
ENU
Technical Information
2025
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.
Jun 9, 2025

Page 4 of 4
AfterSales

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

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