No. WSE2 Service Campaign

Service
Technical Information
2025
ENU
WSE2
2
WSE2 - Re-Program High-Voltage Battery Control Unit (Workshop Campaign)
Change

Overview:
Revision
Date
Change
0
05/21/2025
•
Original Publication
1
06/18/2025
•
Update to terminology in

instructions to Re-program

high-voltage battery control

unit
Model Year:
2025
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 Line:
Panamera E-Hybrid (YAA)

Cayenne E-Hybrid (9YA/9YB)
Concerns:
High-voltage battery control unit
Cause:
Due to a software error in the high-voltage battery control unit, a red warning message "Stop vehicle

safely" may appear in the instrument cluster.
Actions:
•

•
Affected

Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information)
Re-program the high-voltage battery control unit with the latest PIWIS Tester software release.

Minimum requirement: Release 43.400.025
Required tools

Tools:
•

•
Battery charger with a current rating of at least 90 A, e.g., VAS 5908 battery

charger 90 A

P90999 - P90999 - PIWIS Tester 4
AfterSales
Jun 18, 2025

Page 1 of 5
2
Service

WSE2
ENU
Technical Information
2025
Re-program high-voltage battery control unit

1
Read and perform general preliminary work for control unit programming. ⇒ Workshop Manual 'Basic

instructions and procedure for control unit programming using the PIWIS Tester'
2
Connect PIWIS Tester to the vehicle and switch it on.
3
Switch on ignition and have the high-voltage system disabled via the tester sequence "Automatic

verification of absence of electric charge". ⇒ Workshop Manual '277583A1 Deactivation/

commissioning of the high-voltage system'
4
Create Pre-VAL, then start logging.
5
Re-program high-voltage battery control unit.

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

function in the additional menu on the PIWIS

Tester by entering a programming code.
Programming code:
•

•
Programming sequence:
Read and follow the information and instructions

on the PIWIS Tester during the guided

programming sequence.
G3B1D (Panamera)

E3B1D (Cayenne)
Do not interrupt the programming and coding

process.

A backup documentation process for the

re-programmed software releases starts after

programming and coding.
Jun 18, 2025

Page 2 of 5
Programming time (up to):
10 minutes
Procedure if error messages appear during

programming sequence:
⇒ Workshop Manual '9X00IN Basic instructions
AfterSales
and procedure for control unit programming using

the PIWIS Tester'
Service
Technical Information
2025
ENU
WSE2
2
6
Re-activate the high-voltage system. ⇒ Workshop Manual '277583A1 Deactivation/commissioning of

the high-voltage system'
7
Read out all fault memories. If necessary, work through existing faults and delete them.

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.
8
End logging, then create Post-VAL.
9
Enter the campaign in the Warranty and Maintenance Logbook.
Warranty processing

Information

The specified labor times were determined specifically for carrying out this campaign and include all

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

Operation List in the PCSS.

Scope 1:
Re-program high-voltage battery control unit

•
Panamera E-Hybrid

Labor time:

Re-program high-voltage battery control unit

Includes:

Connect and disconnect battery charger

Connect and disconnect PIWIS Tester

Deactivate and activate high-voltage system

Read out and delete fault memory
Labor time: 95 TU
⇒ Damage number WSE2 066 000 1
AfterSales
Jun 18, 2025

Page 3 of 5
2
Service

WSE2
Scope 2:
ENU
Technical Information
2025
Re-program high-voltage battery control unit

•
Cayenne E-Hybrid

Labor time:

Re-program high-voltage battery control unit

Includes:

Connect and disconnect battery charger

Connect and disconnect PIWIS Tester

Deactivate and activate high-voltage system

Read out and delete fault memory
Labor time: 94 TU
⇒ Damage number WSE2 66 000 1
Additional instructions if programming is aborted

Information

If individual programming steps or rework could not be carried out correctly, follow 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"'

During programming always create a logging and, in the event of a fault, a VAL (vehicle analysis log) with

the PIWIS Tester.

Work

Procedure:
Situation:
Action:
After cancelling the control unit programming, the

fault memory entry U003800 - Private CAN bus,

no communication (D12B02) is displayed in the

control unit.
Repeat control unit programming with the following

programming code:

•

•
G3B3C (Panamera)

E3B3C (Cayenne)
Locking time is active and the programming is

cancelled repeatedly as a result.
•

•

•
Deactivate high-voltage system.

Start logging.

Erase fault memory from BMC (Faults remain

active because the high-voltage system has

been deactivated; faults can be ignored in this

step).

Using the "Campaign" function in the additional

menu, enter the campaign code "G3B1D"

(Panamera) or enter "E3B1D" (Cayenne).

If the programming process runs without errors:

End logging and park vehicle (no further steps

necessary).
•

•
Jun 18, 2025

Page 4 of 5
AfterSales
Service
Technical Information
2025

•
•

•
•

•
ENU
WSE2
2
If the programming process does not run

correctly (blocking time error): Cancel

campaign, switch back to the control unit

overview and continue with the next step.

When the ignition is switched on, leave the

vehicle incl. the vehicle communication module

(VCI) plugged in for 15 min.

After 15 minutes, use the additional menu

to re-enter the campaign code "G3B1D"

(Panamera) or "E3B1D" (Cayenne) (there

should no longer be a blocking time error).

If the programming process runs without

errors: End logging and park vehicle (no further

steps necessary).

If the programming process did not run

correctly: End logging and create VAL;

create PRMS ticket and attach logging.
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.
AfterSales
Jun 18, 2025

Page 5 of 5

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